diff --git a/Makefile b/Makefile
index 835b7d96..650b0046 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ endif
 ifeq ($(OS),Linux)
 LINUX_ARCH = $(ARCH)
 else
-LINUX_ARCH = $(shell docker run --rm vproxyio/compile:latest uname -m)
+LINUX_ARCH := $(shell docker run --rm vproxyio/compile:latest uname -m)
 endif
 #
 ifeq ($(LINUX_ARCH),arm64)
@@ -86,7 +86,7 @@ _add_linux_so_to_zip:
 	mkdir -p ./io/vproxy/
 	cp ./base/src/main/c/libvfdposix.so ./io/vproxy/libvfdposix-$(LINUX_ARCH).so
 	cp ./submodules/vpxdp/libvpxdp.so ./io/vproxy/libvpxdp-$(LINUX_ARCH).so
-	cp ./submodules/xdp-tools/lib/libxdp/libxdp.1.4.0 ./io/vproxy/libxdp-$(LINUX_ARCH).so
+	cp ./submodules/vpxdp/submodules/xdp-tools/lib/libxdp/libxdp.so.1.4.0 ./io/vproxy/libxdp-$(LINUX_ARCH).so
 	cp ./libmsquic.so ./io/vproxy/libmsquic-$(LINUX_ARCH).so
 	cp ./base/src/main/c/libmsquic-java.so ./io/vproxy/libmsquic-java-$(LINUX_ARCH).so
 	cp ./submodules/fubuki/target/release/libfubukil.so ./io/vproxy/libfubuki-$(LINUX_ARCH).so
@@ -118,6 +118,8 @@ endif
 .PHONY: jar-with-lib
 ifeq ($(OS),Linux)
 jar-with-lib: clean jar native _add_linux_so_to_zip
+.PHONY: jar-with-lib-skip-native
+jar-with-lib-skip-native: clean-jar jar _add_linux_so_to_zip
 else
 jar-with-lib: clean jar native _add_linux_so_to_zip jar-with-lib-skip-native
 .PHONY: jar-with-lib-no-docker
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/Flag.java b/app/src/main/java/io/vproxy/app/app/cmd/Flag.java
index 69368aac..29116443 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/Flag.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/Flag.java
@@ -16,7 +16,6 @@ public enum Flag {
     disable("disable"),
 
     rxgencsum("rx-gen-csum"),
-    offload("offload"),
     ;
     public final String fullname;
 
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/HelpCommand.java b/app/src/main/java/io/vproxy/app/app/cmd/HelpCommand.java
index 03d89f28..61d695da 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/HelpCommand.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/HelpCommand.java
@@ -1,6 +1,7 @@
 package io.vproxy.app.app.cmd;
 
 import io.vproxy.app.app.Application;
+import io.vproxy.app.app.cmd.handle.param.OffloadHandle;
 import io.vproxy.app.app.cmd.handle.resource.SwitchHandle;
 import io.vproxy.base.Config;
 import io.vproxy.base.util.coll.Tuple;
@@ -447,6 +448,7 @@ public enum ParamMan {
         framesize("frame-size", null, "size of a frame"),
         busypoll("busy-poll", null, "a number indicating whether to enable busy poll, " +
             "and may set the SO_BUSY_POLL_BUDGET as well"),
+        offload("offload", null, "specify offload operations"),
         ip("ip", null, "ip address or ip/mask"),
         iface("iface", null, "connected interface in switch"),
         ;
@@ -470,7 +472,6 @@ public enum FlagMan {
         force("force", null, "forcibly to do something"),
         zerocopy("zerocopy", null, "indicate to perform zerocopy operations"),
         rxgencsum("rx-gen-csum", null, "generate checksum before receiving the packet into vswitch"),
-        offload("offload", null, "offload operations from java"),
         enable("enable", null, "enable the resource"),
         disable("disable", null, "disable the resource"),
         ;
@@ -1372,15 +1373,17 @@ public enum ResMan {
                 new ResActMan(ActMan.addto, "add xdp socket into the switch", Arrays.asList(
                     new ResActParamMan(ParamMan.umem, "umem for the xdp socket to use. See `umem` for more info"),
                     new ResActParamMan(ParamMan.queue, "the queue index to bind to"),
-                    new ResActParamMan(ParamMan.rxringsize, "rx ring size", "" + SwitchUtils.RX_TX_CHUNKS),
-                    new ResActParamMan(ParamMan.txringsize, "tx ring size", "" + SwitchUtils.RX_TX_CHUNKS),
+                    new ResActParamMan(ParamMan.rxringsize, "rx ring size", "" + SwitchUtils.DEFAULT_RX_TX_CHUNKS),
+                    new ResActParamMan(ParamMan.txringsize, "tx ring size", "" + SwitchUtils.DEFAULT_RX_TX_CHUNKS),
                     new ResActParamMan(ParamMan.mode, "mode of the xsk, enum: {SKB, DRIVER}, see doc for more info", "" + BPFMode.SKB),
                     new ResActParamMan(ParamMan.busypoll, "whether to enable busy poll, and set SO_BUSY_POLL_BUDGET. Set this option to 0 to disable busy poll", "0"),
-                    new ResActParamMan(ParamMan.vrf, "vrf which the iface is assigned to")
+                    new ResActParamMan(ParamMan.vrf, "vrf which the iface is assigned to"),
+                    new ResActParamMan(ParamMan.offload, "support " + OffloadHandle.PACKET_SWITCHING + "," + OffloadHandle.CHECKSUM + ". " +
+                                                         "Note that checksum offloading requires kernel version >= 6.8 and not all drivers support this feature",
+                        "(none)")
                 ), Arrays.asList(
                     new ResActFlagMan(FlagMan.zerocopy, "allow kernel to use zerocopy machanism", false),
-                    new ResActFlagMan(FlagMan.rxgencsum, "generate checksum in native code before receiving the packet in java", false),
-                    new ResActFlagMan(FlagMan.offload, "offload mac switching to xdp program", false)
+                    new ResActFlagMan(FlagMan.rxgencsum, "generate checksum in native code before receiving the packet in java", false)
                 ), Arrays.asList(
                     new Tuple<>(
                         "add xdp xdptut-4667 to switch sw0 umem umem0 queue 0 rx-ring-size 2048 tx-ring-size 2048 mode SKB vrf 1 zerocopy",
@@ -1487,9 +1490,9 @@ public enum ResMan {
         umem("umem", null, "umem for xdp sockets to use",
             Arrays.asList(
                 new ResActMan(ActMan.addto, "add a umem to a switch", Arrays.asList(
-                    new ResActParamMan(ParamMan.chunks, "how many chunks are there in this umem", "" + (SwitchUtils.RX_TX_CHUNKS * 2)),
-                    new ResActParamMan(ParamMan.fillringsize, "size of the fill ring", "" + SwitchUtils.RX_TX_CHUNKS),
-                    new ResActParamMan(ParamMan.compringsize, "size of the comp ring", "" + SwitchUtils.RX_TX_CHUNKS),
+                    new ResActParamMan(ParamMan.chunks, "how many chunks are there in this umem", "" + (SwitchUtils.DEFAULT_UMEM_CHUNKS)),
+                    new ResActParamMan(ParamMan.fillringsize, "size of the fill ring", "" + SwitchUtils.DEFAULT_RX_TX_CHUNKS),
+                    new ResActParamMan(ParamMan.compringsize, "size of the comp ring", "" + SwitchUtils.DEFAULT_RX_TX_CHUNKS),
                     new ResActParamMan(ParamMan.framesize, "size of the frame, must be 2048 or 4096", "" + SwitchUtils.TOTAL_RCV_BUF_LEN / 2)
                 ), Arrays.asList(
                     new Tuple<>(
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/ModuleCommands.kt b/app/src/main/java/io/vproxy/app/app/cmd/ModuleCommands.kt
index a70363ce..ccbd35e5 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/ModuleCommands.kt
+++ b/app/src/main/java/io/vproxy/app/app/cmd/ModuleCommands.kt
@@ -919,11 +919,11 @@ class ModuleCommands private constructor() : Commands() {
           it + ResActParam(Param.mode) { BPFModeHandle.check(it) }
           it + ResActParam(Param.busypoll) { BusyPollHandle.check(it) }
           it + ResActParam(Param.vrf, required) { VrfParamHandle.check(it) }
+          it + ResActParam(Param.offload) { OffloadHandle.check(it) }
         },
         flags = {
           it + ResActFlag(Flag.zerocopy)
           it + ResActFlag(Flag.rxgencsum)
-          it + ResActFlag(Flag.offload)
         },
         exec = execUpdate { XDPHandle.add(it) }
       )
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/Param.java b/app/src/main/java/io/vproxy/app/app/cmd/Param.java
index 54ec4d1b..1850d2d0 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/Param.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/Param.java
@@ -60,6 +60,7 @@ public enum Param {
     compringsize("comp-ring-size"),
     framesize("frame-size"),
     busypoll("busy-poll"),
+    offload("offload"),
 
     url("url"),
     cls("class"),
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/handle/param/OffloadHandle.java b/app/src/main/java/io/vproxy/app/app/cmd/handle/param/OffloadHandle.java
new file mode 100644
index 00000000..7a2327df
--- /dev/null
+++ b/app/src/main/java/io/vproxy/app/app/cmd/handle/param/OffloadHandle.java
@@ -0,0 +1,53 @@
+package io.vproxy.app.app.cmd.handle.param;
+
+import io.vproxy.app.app.cmd.Command;
+import io.vproxy.app.app.cmd.Param;
+
+import java.util.Arrays;
+
+public class OffloadHandle {
+    private OffloadHandle() {
+    }
+
+    public static final String PACKET_SWITCHING = "pktsw";
+    public static final String CHECKSUM = "csum";
+
+    public static boolean check(Command cmd, String... available) {
+        if (!cmd.args.containsKey(Param.offload)) {
+            return true;
+        }
+        var lsAvailable = Arrays.asList(available);
+        var offload = cmd.args.get(Param.offload);
+        var split = offload.split(",");
+        for (var s : split) {
+            s = s.trim();
+            if (!lsAvailable.contains(s)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean isPacketSwitchingOffloaded(Command cmd) {
+        return isOffloaded(cmd, PACKET_SWITCHING);
+    }
+
+    public static boolean isChecksumOffloaded(Command cmd) {
+        return isOffloaded(cmd, CHECKSUM);
+    }
+
+    private static boolean isOffloaded(Command cmd, String match) {
+        var offload = cmd.args.get(Param.offload);
+        if (offload == null) {
+            return false;
+        }
+        var split = offload.split(",");
+        for (var s : split) {
+            s = s.trim();
+            if (s.equals(match)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/ArpHandle.java b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/ArpHandle.java
index 8182a58b..8bef1c8f 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/ArpHandle.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/ArpHandle.java
@@ -83,18 +83,18 @@ public static List<ArpEntry> list(Resource parent) throws Exception {
             macInArpEntries.add(a.mac);
             var macEntry = macEntriesMap.get(a.mac);
             if (macEntry == null) {
-                result.add(new ArpEntry(a.mac, a.ip, null, a.getTTL(), -1, false));
+                result.add(new ArpEntry(a.mac, a.ip, null, a.getTTL(), -1, false, 0));
             } else {
                 var iface = macEntry.iface;
                 var ttl = macEntry.getTTL();
-                result.add(new ArpEntry(a.mac, a.ip, iface, a.getTTL(), ttl, macEntry.isOffloaded()));
+                result.add(new ArpEntry(a.mac, a.ip, iface, a.getTTL(), ttl, macEntry.isOffloaded(), macEntry.getOffloadedCount()));
             }
         }
         for (var m : macEntries) {
             if (macInArpEntries.contains(m.mac)) {
                 continue;
             }
-            result.add(new ArpEntry(m.mac, null, m.iface, -1, m.getTTL(), m.isOffloaded()));
+            result.add(new ArpEntry(m.mac, null, m.iface, -1, m.getTTL(), m.isOffloaded(), m.getOffloadedCount()));
         }
         result.sort((a, b) -> {
             // sort by mac
@@ -144,23 +144,9 @@ public static void remove(Command cmd) throws Exception {
         net.arpTable.remove(mac);
     }
 
-    public static class ArpEntry {
-        public final MacAddress mac;
-        public final IP ip;
-        public final Iface iface;
-        public final long arpTTL;
-        public final long macTTL;
-        public final boolean offloaded;
-
-        public ArpEntry(MacAddress mac, IP ip, Iface iface, long arpTTL, long macTTL, boolean offloaded) {
-            this.mac = mac;
-            this.ip = ip;
-            this.iface = iface;
-            this.arpTTL = arpTTL;
-            this.macTTL = macTTL;
-            this.offloaded = offloaded;
-        }
-
+    public record ArpEntry(
+        MacAddress mac, IP ip, Iface iface, long arpTTL, long macTTL, boolean offloaded, int offloadedCount
+    ) {
         private String strForIp(ArpEntry e) {
             if (e.ip == null) return "";
             return e.ip.formatToIPString();
@@ -236,7 +222,7 @@ public String toString(List<ArpEntry> all) {
             String strMacTTL = strForMacTTL(this);
             sb.append(split).append("MAC-TTL:").append(strMacTTL);
             if (offloaded) {
-                sb.append("/offload");
+                sb.append("/offload(").append(offloadedCount).append(")");
             }
             return sb.toString();
         }
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/UMemHandle.java b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/UMemHandle.java
index 7c8c0de4..4152aa30 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/UMemHandle.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/UMemHandle.java
@@ -31,9 +31,9 @@ public static UMem get(String alias, String swAlias) throws NotFoundException {
     }
 
     public static void add(Command cmd) throws Exception {
-        int chunksSize = RingSizeHandle.get(cmd, Param.chunks, SwitchUtils.RX_TX_CHUNKS * 2);
-        int fillRingSize = RingSizeHandle.get(cmd, Param.fillringsize, SwitchUtils.RX_TX_CHUNKS);
-        int compRingSize = RingSizeHandle.get(cmd, Param.compringsize, SwitchUtils.RX_TX_CHUNKS);
+        int chunksSize = RingSizeHandle.get(cmd, Param.chunks, SwitchUtils.DEFAULT_UMEM_CHUNKS);
+        int fillRingSize = RingSizeHandle.get(cmd, Param.fillringsize, SwitchUtils.DEFAULT_RX_TX_CHUNKS);
+        int compRingSize = RingSizeHandle.get(cmd, Param.compringsize, SwitchUtils.DEFAULT_RX_TX_CHUNKS);
         int frameSize = FrameSizeHandle.get(cmd, SwitchUtils.TOTAL_RCV_BUF_LEN / 2);
 
         Switch sw = Application.get().switchHolder.get(cmd.prepositionResource.alias);
diff --git a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/XDPHandle.java b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/XDPHandle.java
index 8acf924f..5724e0b4 100644
--- a/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/XDPHandle.java
+++ b/app/src/main/java/io/vproxy/app/app/cmd/handle/resource/XDPHandle.java
@@ -21,8 +21,8 @@ public static void add(Command cmd) throws Exception {
         UMem umem = UMemHandle.get(cmd.args.get(Param.umem), sw.alias);
 
         int queueId = QueueHandle.get(cmd);
-        int rxRingSize = RingSizeHandle.get(cmd, Param.rxringsize, SwitchUtils.RX_TX_CHUNKS);
-        int txRingSize = RingSizeHandle.get(cmd, Param.txringsize, SwitchUtils.RX_TX_CHUNKS);
+        int rxRingSize = RingSizeHandle.get(cmd, Param.rxringsize, SwitchUtils.DEFAULT_RX_TX_CHUNKS);
+        int txRingSize = RingSizeHandle.get(cmd, Param.txringsize, SwitchUtils.DEFAULT_RX_TX_CHUNKS);
         boolean zeroCopy = cmd.flags.contains(Flag.zerocopy);
         int busyPollBudget = 0;
         if (cmd.args.containsKey(Param.busypoll)) {
@@ -30,7 +30,8 @@ public static void add(Command cmd) throws Exception {
         }
         boolean rxGenChecksum = cmd.flags.contains(Flag.rxgencsum);
         int vrf = VrfParamHandle.get(cmd);
-        boolean offload = cmd.flags.contains(Flag.offload);
+        boolean pktswOffloaded = OffloadHandle.isPacketSwitchingOffloaded(cmd);
+        boolean csumOffloaded = OffloadHandle.isChecksumOffloaded(cmd);
 
         var nic = cmd.resource.alias;
         var mode = BPFModeHandle.get(cmd, BPFMode.SKB);
@@ -41,12 +42,26 @@ public static void add(Command cmd) throws Exception {
 
         try {
             var xskMap = bpfobj.getMap(Prebuilt.DEFAULT_XSKS_MAP_NAME);
-            var macMap = createResult.map();
+            var mac2portMap = createResult.mac2portMap();
+            var port2devMap = createResult.port2devMap();
             var srcmac2countMap = bpfobj.getMap(Prebuilt.DEFAULT_SRC_MAC_TO_COUNT_MAP_NAME);
+            var passmacMap = bpfobj.getMap(Prebuilt.DEFAULT_PASS_MAC_MAP_NAME);
 
-            sw.addXDP(nic, vrf, umem, new XDPIface.XDPParams(
-                queueId, rxRingSize, txRingSize, mode, zeroCopy, busyPollBudget, rxGenChecksum, offload,
-                new XDPIface.BPFInfo(bpfobj, xskMap, macMap, srcmac2countMap, createResult.groupName())));
+            var bpfInfo = new XDPIface.BPFInfo(bpfobj, xskMap, mac2portMap, port2devMap, srcmac2countMap, passmacMap, createResult.groupName());
+
+            sw.addXDP(nic, vrf, umem, new XDPIface.XDPParamsBuilder()
+                .setQueueId(queueId)
+                .setBPFInfo(bpfInfo)
+                .setRxRingSize(rxRingSize)
+                .setTxRingSize(txRingSize)
+                .setMode(mode)
+                .setZeroCopy(zeroCopy)
+                .setBusyPollBudget(busyPollBudget)
+                .setRxGenChecksum(rxGenChecksum)
+                .setPktswOffloaded(pktswOffloaded)
+                .setCsumOffloaded(csumOffloaded)
+                .build()
+            );
         } catch (Exception e) {
             Logger.error(LogType.SYS_ERROR, "failed to create xdp interface " + nic, e);
             createResult.release(true);
diff --git a/app/src/main/java/io/vproxy/app/controller/DockerNetworkDriverImpl.java b/app/src/main/java/io/vproxy/app/controller/DockerNetworkDriverImpl.java
index a6824a3c..6f2952f1 100644
--- a/app/src/main/java/io/vproxy/app/controller/DockerNetworkDriverImpl.java
+++ b/app/src/main/java/io/vproxy/app/controller/DockerNetworkDriverImpl.java
@@ -386,31 +386,41 @@ private XDPIface createXDPIface(Switch sw, UMem umem, VirtualNetwork net, String
             bpfobj = BPFObject.loadAndAttachToNic(nicname, BPFMode.SKB, true);
         }
 
-        BPFMap mac2portMap;
+        BPFMap mac2portMap = null;
+        BPFMap port2devMap = null;
+        BPFMap srcmac2countMap = null;
         try {
-            mac2portMap = bpfobj.getMap(Prebuilt.DEFAULT_MAC_TO_PORT_MAP_NAME);
-        } catch (Exception e) {
-            Logger.error(LogType.SYS_ERROR, "failed to retrieve mac2port map", e);
             if (isPodNic) {
-                reusedResult.release(true);
-            } else {
-                bpfobj.release(true);
+                mac2portMap = bpfobj.getMap(Prebuilt.DEFAULT_MAC_TO_PORT_MAP_NAME);
+                port2devMap = bpfobj.getMap(Prebuilt.DEFAULT_PORT_TO_DEV_MAP_NAME);
+                srcmac2countMap = bpfobj.getMap(Prebuilt.DEFAULT_SRC_MAC_TO_COUNT_MAP_NAME);
             }
+        } catch (Exception e) {
+            Logger.error(LogType.SYS_ERROR, "failed to retrieve mac2port map", e);
+            reusedResult.release(true);
             throw e;
         }
 
+        var bpfInfo = new XDPIface.BPFInfo(
+            bpfobj,
+            bpfobj.getMap(Prebuilt.DEFAULT_XSKS_MAP_NAME),
+            mac2portMap,
+            port2devMap,
+            srcmac2countMap,
+            null,
+            isPodNic ? SHARED_BPF_MAP_GROUP_NAME : null
+        );
+
         XDPIface iface;
         try {
             iface = sw.addXDP(nicname, net != null ? net.vrf : NETWORK_ENTRY_VRF, umem,
-                new XDPIface.XDPParams(0, 32, 32, BPFMode.SKB,
-                    false, 0, false, isPodNic,
-                    new XDPIface.BPFInfo(
-                        bpfobj,
-                        bpfobj.getMap(Prebuilt.DEFAULT_XSKS_MAP_NAME),
-                        isPodNic ? mac2portMap : null,
-                        isPodNic ? bpfobj.getMap(Prebuilt.DEFAULT_SRC_MAC_TO_COUNT_MAP_NAME) : null,
-                        isPodNic ? SHARED_BPF_MAP_GROUP_NAME : null
-                    )));
+                new XDPIface.XDPParamsBuilder()
+                    .setQueueId(0)
+                    .setBPFInfo(bpfInfo)
+                    .setRxGenChecksum(!NativeXDP.supportTxMetadata)
+                    .setPktswOffloaded(isPodNic)
+                    .setCsumOffloaded(true)
+                    .build());
         } catch (Exception e) {
             Logger.error(LogType.SYS_ERROR, "failed to create xdp interface: " + nicname, e);
             if (isPodNic) {
diff --git a/app/src/main/java/io/vproxy/app/process/Shutdown.java b/app/src/main/java/io/vproxy/app/process/Shutdown.java
index 83681dd8..de4d3a3d 100644
--- a/app/src/main/java/io/vproxy/app/process/Shutdown.java
+++ b/app/src/main/java/io/vproxy/app/process/Shutdown.java
@@ -1,6 +1,7 @@
 package io.vproxy.app.process;
 
 import io.vproxy.app.app.*;
+import io.vproxy.app.app.cmd.handle.param.OffloadHandle;
 import io.vproxy.app.app.util.SignalHook;
 import io.vproxy.app.controller.HttpController;
 import io.vproxy.app.controller.RESPController;
@@ -758,8 +759,14 @@ public static String currentConfig() {
                         + " mode " + xdp.params.mode().name()
                         + " busy-poll " + xdp.params.busyPollBudget()
                         + " vrf " + xdp.vrf;
-                    if (xdp.params.offload()) {
-                        cmd += " offload";
+                    if (xdp.params.pktswOffloaded() || xdp.params.csumOffloaded()) {
+                        cmd += " offload ";
+                        var ls = new ArrayList<String>();
+                        if (xdp.params.pktswOffloaded())
+                            ls.add(OffloadHandle.PACKET_SWITCHING);
+                        if (xdp.params.csumOffloaded())
+                            ls.add(OffloadHandle.CHECKSUM);
+                        cmd += String.join(",", ls);
                     }
                     if (xdp.params.zeroCopy()) {
                         cmd += " zerocopy";
diff --git a/base/src/main/java/io/vproxy/vfd/posix/AESelector.java b/base/src/main/java/io/vproxy/vfd/posix/AESelector.java
index b6f9f6b6..62ad9a46 100644
--- a/base/src/main/java/io/vproxy/vfd/posix/AESelector.java
+++ b/base/src/main/java/io/vproxy/vfd/posix/AESelector.java
@@ -18,7 +18,7 @@ public class AESelector implements FDSelector {
 
     private final Posix posix;
     private final long ae;
-    private final int[] pipefd; // null, or pipefd[read][write], might be the same if using linux eventfd
+    private final int[] pipefd; // pipefd[read][write], might be the same if using linux eventfd
     private final Att[] attachments;
     private final DirectByteBuffer bufferForPipeFD;
     private boolean closed = false;
@@ -62,19 +62,17 @@ private EventSet getJavaEvents(int events) {
     }
 
     private void clearPipeFD() {
-        if (pipefd != null) {
-            while (true) {
-                int x;
-                try {
-                    x = posix.read(pipefd[0], bufferForPipeFD.realBuffer(), 0, 8);
-                } catch (IOException e) {
-                    Logger.shouldNotHappen("reading from read end of pipefd failed", e);
-                    break;
-                }
-                assert x == 0 || x == 8;
-                if (x == 0) {
-                    break;
-                }
+        while (true) {
+            int x;
+            try {
+                x = posix.read(pipefd[0], bufferForPipeFD.realBuffer(), 0, 8);
+            } catch (IOException e) {
+                Logger.shouldNotHappen("reading from read end of pipefd failed", e);
+                break;
+            }
+            assert x == 0 || x == 8;
+            if (x == 0) {
+                break;
             }
         }
     }
@@ -147,9 +145,6 @@ public Collection<SelectedEntry> select(long millis) throws IOException {
 
     @Override
     public void wakeup() {
-        if (pipefd == null) {
-            throw new UnsupportedOperationException("does not support wakeup");
-        }
         checkOpen();
         bufferForPipeFD.getMemorySegment().set(ValueLayout.JAVA_LONG, 0, 1L);
         try {
@@ -273,18 +268,16 @@ public void close() {
         if (bufferForPipeFD != null) {
             bufferForPipeFD.clean();
         }
-        if (pipefd != null) {
+        try {
+            posix.close(pipefd[0]);
+        } catch (IOException e) {
+            Logger.shouldNotHappen("closing read end of the pipefd failed", e);
+        }
+        if (pipefd[1] != pipefd[0]) {
             try {
-                posix.close(pipefd[0]);
+                posix.close(pipefd[1]);
             } catch (IOException e) {
-                Logger.shouldNotHappen("closing read end of the pipefd failed", e);
-            }
-            if (pipefd[1] != pipefd[0]) {
-                try {
-                    posix.close(pipefd[1]);
-                } catch (IOException e) {
-                    Logger.shouldNotHappen("closing write end of the pipefd failed", e);
-                }
+                Logger.shouldNotHappen("closing write end of the pipefd failed", e);
             }
         }
     }
diff --git a/base/src/main/java/io/vproxy/xdp/BPFMap.java b/base/src/main/java/io/vproxy/xdp/BPFMap.java
index 55c6fa47..4c1876fc 100644
--- a/base/src/main/java/io/vproxy/xdp/BPFMap.java
+++ b/base/src/main/java/io/vproxy/xdp/BPFMap.java
@@ -31,7 +31,7 @@ public int getInt(MacAddress mac) throws IOException {
                 if (err == -XDPConsts.ENOENT) {
                     throw new FileNotFoundException();
                 }
-                throw new IOException("failed to retrieve value of key " + mac + " from " + this);
+                throw new IOException("failed to retrieve value of key " + mac + " from " + this + ", err = " + err);
             }
             return value.get(ValueLayout.JAVA_INT, 0);
         }
@@ -42,47 +42,71 @@ private void setMacIntoMemSeg(MacAddress mac, MemorySegment seg) {
     }
 
     public void put(int key, XDPSocket xsk) throws IOException {
-        int res = map.addXsk(key, xsk.xsk);
-        if (res != 0) {
-            throw new IOException("failed to add xsk " + xsk.xsk + " to " + this);
+        int err = map.addXsk(key, xsk.xsk);
+        if (err != 0) {
+            throw new IOException("failed to add xsk " + xsk.xsk + " to " + this + ", err = " + err);
         }
     }
 
     public void putNetif(MacAddress mac, String ifname) throws IOException {
-        int res;
+        int err;
         try (var allocator = Allocator.ofConfined()) {
             var macRaw = allocator.allocate(6);
             setMacIntoMemSeg(mac, macRaw);
-            res = map.addMac2Port(macRaw, new PNIString(allocator, ifname));
+            err = map.addMac2Port(macRaw, new PNIString(allocator, ifname));
         }
-        if (res != 0) {
-            throw new IOException("failed to add mac " + mac + " to " + this);
+        if (err != 0) {
+            throw new IOException("failed to add mac2port " + mac + " -> " + ifname + " to " + this + ", err = " + err);
+        }
+    }
+
+    public void putNetif(String ifname) throws IOException {
+        int err;
+        try (var allocator = Allocator.ofConfined()) {
+            err = map.addPort2Dev(new PNIString(allocator, ifname));
+        }
+        if (err != 0) {
+            throw new IOException("failed to add port2dev " + ifname + " -> " + ifname + " to " + this + ", err = " + err);
         }
     }
 
     public void put(int key, byte value) throws IOException {
-        int res;
+        int err;
         try (var allocator = Allocator.ofConfined()) {
             var keyRaw = allocator.allocate(4);
             var valueRaw = allocator.allocate(1);
             keyRaw.set(ValueLayout.JAVA_INT, 0, key);
             valueRaw.set(ValueLayout.JAVA_BYTE, 0, value);
-            res = map.update(keyRaw, 4, valueRaw, 1, 0);
+            err = map.update(keyRaw, 4, valueRaw, 1, 0);
+        }
+        if (err != 0) {
+            throw new IOException("failed to add " + key + " => " + value + " to " + this + ", err = " + err);
+        }
+    }
+
+    public void put(MacAddress mac, byte value) throws IOException {
+        int err;
+        try (var allocator = Allocator.ofConfined()) {
+            var keyRaw = allocator.allocate(6);
+            var valueRaw = allocator.allocate(1);
+            setMacIntoMemSeg(mac, keyRaw);
+            valueRaw.set(ValueLayout.JAVA_BYTE, 0, value);
+            err = map.update(keyRaw, 6, valueRaw, 1, 0);
         }
-        if (res != 0) {
-            throw new IOException("failed to add " + key + " => " + value + " to " + this);
+        if (err != 0) {
+            throw new IOException("failed to add " + mac + " => " + value + " to " + this + ", err = " + err);
         }
     }
 
     public void remove(MacAddress mac) throws IOException {
-        int res;
+        int err;
         try (var allocator = Allocator.ofConfined()) {
             var macRaw = allocator.allocate(6);
             setMacIntoMemSeg(mac, macRaw);
-            res = map.delete(macRaw, 6);
+            err = map.delete(macRaw, 6, 0);
         }
-        if (res != 0) {
-            throw new IOException("failed to remove mac " + mac + " from " + this);
+        if (err != 0) {
+            throw new IOException("failed to remove mac " + mac + " from " + this + ", err = " + err);
         }
     }
 }
diff --git a/base/src/main/java/io/vproxy/xdp/BPFObject.java b/base/src/main/java/io/vproxy/xdp/BPFObject.java
index c80cd507..a26add56 100644
--- a/base/src/main/java/io/vproxy/xdp/BPFObject.java
+++ b/base/src/main/java/io/vproxy/xdp/BPFObject.java
@@ -13,6 +13,7 @@
 import java.io.IOException;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import static io.vproxy.xdp.Prebuilt.DEFAULT_PROG;
 
@@ -82,6 +83,9 @@ public static BPFObject load(ByteArray bpfObjectBytes) throws IOException {
         var filename = generateBpfObjectFile(bpfObjectBytes);
         try (var allocator = Allocator.ofConfined()) {
             var o = XDP.get().loadBPFObject(new PNIString(allocator, filename), null);
+            if (o == null) {
+                throw new IOException("loading bpfobj failed");
+            }
             obj = new BPFObject(o, null);
         }
         return obj;
@@ -113,7 +117,13 @@ public BPFMap getMap(String name) throws IOException {
         }
     }
 
+    private final AtomicBoolean isReleased = new AtomicBoolean(false);
+
     public void release(boolean detach) {
+        if (!isReleased.compareAndSet(false, true)) {
+            return;
+        }
+
         bpfobj.release();
         if (detach) {
             int res;
diff --git a/base/src/main/java/io/vproxy/xdp/Prebuilt.java b/base/src/main/java/io/vproxy/xdp/Prebuilt.java
index 2dd6b889..a39b2149 100644
--- a/base/src/main/java/io/vproxy/xdp/Prebuilt.java
+++ b/base/src/main/java/io/vproxy/xdp/Prebuilt.java
@@ -6,7 +6,9 @@ public class Prebuilt {
     public static final String DEFAULT_XDP_PROG_NAME = "xdp_sock";
     public static final String DEFAULT_XSKS_MAP_NAME = "xsks_map";
     public static final String DEFAULT_MAC_TO_PORT_MAP_NAME = "mac2port_map";
+    public static final String DEFAULT_PORT_TO_DEV_MAP_NAME = "port2dev_map";
     public static final String DEFAULT_SRC_MAC_TO_COUNT_MAP_NAME = "srcmac2count_map";
+    public static final String DEFAULT_PASS_MAC_MAP_NAME = "pass_mac_map";
 
     public static final String HANDLE_DST_PORT_MAP_NAME = "handled_ports";
 
@@ -18,283 +20,350 @@ private Prebuilt() {
     private static final ByteArray _DEFAULT_PROG = ByteArray.fromHexString(
         "7f454c46020101000000000000000000" +
         "0100f700010000000000000000000000" +
-        "00000000000000003822000000000000" +
+        "00000000000000000028000000000000" +
         "00000000400000000000400019000100" +
-        "bf160000000000006161040000000000" +
-        "6168000000000000bf82000000000000" +
-        "07020000060000002d122e0000000000" +
+        "bf16000000000000b700000001000000" +
+        "61610400000000006162000000000000" +
+        "bf230000000000000703000006000000" +
+        "2d134700000000001801000000000000" +
+        "00000000000000008500000001000000" +
+        "bf01000000000000b700000002000000" +
+        "55014100000000006161040000000000" +
+        "6167000000000000bf72000000000000" +
+        "070200000e0000002d12370000000000" +
+        "71710d000000000071720c0000000000" +
+        "67020000080000004f12000000000000" +
+        "15023200008100001801000000000000" +
+        "0000000000000000bf72000000000000" +
+        "8500000001000000bf08000000000000" +
+        "15082c00000000000707000006000000" +
         "18010000000000000000000000000000" +
-        "bf820000000000008500000001000000" +
-        "15002900000000006107000000000000" +
-        "61610c00000000001d71260000000000" +
+        "bf720000000000008500000001000000" +
+        "15002600000000006101000000000000" +
+        "61620c00000000005d12230000000000" +
+        "61870000000000001d71210000000000" +
+        "61610400000000006168000000000000" +
+        "bf82000000000000070200000c000000" +
+        "2d121300000000000708000006000000" +
         "18010000000000000000000000000000" +
         "bf820000000000008500000001000000" +
-        "bf01000000000000b700000002000000" +
-        "55012900000000006161040000000000" +
-        "6168000000000000bf82000000000000" +
-        "070200000c0000002d12130000000000" +
-        "07080000060000001801000000000000" +
+        "55000a0000000000b701000001000000" +
+        "631afcff00000000bfa3000000000000" +
+        "07030000fcffffff1801000000000000" +
         "0000000000000000bf82000000000000" +
-        "850000000100000055000a0000000000" +
-        "b701000001000000631afcff00000000" +
-        "bfa300000000000007030000fcffffff" +
+        "b7040000000000008500000002000000" +
+        "05000300000000006101000000000000" +
+        "07010000010000006310000000000000" +
         "18010000000000000000000000000000" +
-        "bf82000000000000b704000000000000" +
-        "85000000020000000500030000000000" +
-        "61010000000000000701000001000000" +
-        "6310000000000000bf71000000000000" +
-        "b7020000000000008500000017000000" +
-        "bf010000000000006701000020000000" +
-        "770100002000000025010a0001000000" +
-        "b7000000010000006161040000000000" +
-        "61620000000000000702000006000000" +
-        "2d120500000000006162100000000000" +
+        "bf72000000000000b703000001000000" +
+        "8500000033000000bf01000000000000" +
+        "67010000200000007701000020000000" +
+        "25010500010000006162100000000000" +
         "18010000000000000000000000000000" +
         "b7030000010000008500000033000000" +
         "95000000000000000000000000000000" +
         "00000000000000000000000000000000" +
-        "0000000000000000dd00000005000800" +
-        "0f0000003c000000480000004e000000" +
-        "5900000060000000670000006e000000" +
-        "76000000850000008d0000009c000000" +
-        "b5000000bd000000c5000000cd000000" +
-        "04000801510408f80301560004104001" +
-        "510004182801580428480152000418b8" +
-        "01015800045090010150000460a00301" +
-        "570004b001e80101510004b801c80101" +
-        "5804c801f00101520004b801d8010158" +
-        "0004f801c802015004d002e802015000" +
-        "04800290020311019f049002d002027a" +
-        "0404d802e002015100048003a0030150" +
-        "0004b003e00301510004b803d0030152" +
-        "0004b803c00301520001110125251305" +
-        "0325721710171b25111b120673178c01" +
-        "170000023400032549133a0b3b050000" +
-        "03260049130000040f00491300000515" +
-        "01491327190000060500491300000724" +
-        "0003253e0b0b0b0000080f0000000916" +
-        "00491303253a0b3b0b00000a34000325" +
-        "49133f193a0b3b0b021800000b13010b" +
-        "0b3a0b3b0b00000c0d00032549133a0b" +
-        "3b0b380b00000d0101491300000e2100" +
-        "4913370b00000f240003250b0b3e0b00" +
-        "00102100491337050000113400032549" +
-        "133a0b3b0b0000122600000013040149" +
-        "1303250b0b3a0b3b0500001428000325" +
-        "1c0f0000152e0103253a0b3b0b271949" +
-        "133f19202101000016050003253a0b3b" +
-        "0b4913000017340003253a0b3b0b4913" +
-        "000018130103250b0b3a0b3b05000019" +
-        "0d00032549133a0b3b05380b00001a2e" +
-        "0103253a0b3b0b27193f192021010000" +
-        "1b2e01111b120640187a1903253a0b3b" +
-        "0b271949133f1900001c050002220325" +
-        "3a0b3b0b491300001d3400022203253a" +
-        "0b3b0b491300001e1d013113111b1206" +
-        "580b590b570b00001f05000218311300" +
-        "00203400022231130000009803000005" +
-        "0001080000000001000c000108000000" +
-        "000000000204f8010000080000000c00" +
-        "0000020330000000022d050335000000" +
-        "043a000000054f000000065300000006" +
-        "54000000065400000000070405080809" +
-        "5c00000006011f070507080a076b0000" +
-        "00000902a1000b2000040c0894000000" +
-        "0005000c0bad0000000006080c0cbe00" +
-        "00000007100c0dbe0000000008180004" +
-        "990000000da50000000ea90000001100" +
-        "070905040f0a080704b20000000da500" +
-        "00000ea9000000800004a50000000a0e" +
-        "ce000000001102a1010b20000c0c08f7" +
-        "000000000d000c0b08010000000e080c" +
-        "0c1a010000000f100c0dbe0000000010" +
-        "180004fc0000000da50000000ea90000" +
-        "000900040d0100000da500000010a900" +
-        "0000001000041f0100000d2b0100000e" +
-        "a90000000600070f06010a103a010000" +
-        "001902a1020b2000140c08f700000000" +
-        "15000c0b080100000016080c0c1a0100" +
-        "000017100c0d6301000000181800042b" +
-        "0100000a1173010000002002a1030b20" +
-        "001b0c08f7000000001c000c0b080100" +
-        "00001d080c0c1a010000001e100c0dbe" +
-        "000000001f18001112a4010000023803" +
-        "a901000004ae01000005530000000653" +
-        "00000006be0100000004c30100001202" +
-        "13cd010000026d0203d201000004d701" +
-        "0000054f00000006e701000006540000" +
-        "000009ef01000015011b071407041116" +
-        "fb010000024e03000200000405020000" +
-        "054f000000065300000006be01000006" +
-        "be01000006540000000013ef0100001c" +
-        "04031919141700141801141902141a03" +
-        "141b0400043e020000071d0801151e00" +
-        "35a5000000161f00357b020000172100" +
-        "36390200001727003839020000172000" +
-        "37390200001728003dbe000000172900" +
-        "41a50000000004800200001826180324" +
-        "191920e7010000032519001921e70100" +
-        "00032619041922e70100000327190819" +
-        "23e70100000329190c1924e701000003" +
-        "2a19101925e7010000032c1914001a2a" +
-        "0022161f00227b020000172100233902" +
-        "00001727002539020000172000243902" +
-        "0000172b002abe000000172c002ba500" +
-        "0000001b04f8010000015a2d004da500" +
-        "00001c001f004d7b0200001d0b2e004f" +
-        "a50000001d0c210054390200001d0d27" +
-        "0056390200001d0e200055390200001e" +
-        "420200000590010000004f181f01564a" +
-        "02000020015202000020025a02000020" +
-        "036202000020046a0200002005720200" +
-        "001ec302000006c00000000049051f01" +
-        "56c70200002006cf0200002007d70200" +
-        "002008df0200002009e7020000200aef" +
-        "02000000000000c00000000500000000" +
-        "00000027000000310000004200000053" +
-        "000000580000006b000000710000007a" +
-        "0000007f0000008300000097000000a3" +
-        "000000a7000000ad000000ba000000bf" +
-        "000000cc000000dd000000f1000000fe" +
-        "0000000b010000110100002501000031" +
-        "0100003a010000430100004a01000057" +
-        "01000062010000700100008401000088" +
-        "0100008d01000096010000a0010000b0" +
-        "010000bf010000ce010000d5010000d9" +
-        "010000ea010000f70100000b02000013" +
-        "02000017020000200200005562756e74" +
-        "7520636c616e672076657273696f6e20" +
-        "31342e302e302d317562756e7475312e" +
-        "310064656661756c742e63002f767072" +
-        "6f78792f7072656275696c7400627066" +
-        "5f72656469726563745f6d6170006c6f" +
-        "6e6700756e7369676e6564206c6f6e67" +
-        "206c6f6e67005f5f7536340078736b73" +
-        "5f6d6170007479706500696e74005f5f" +
-        "41525241595f53495a455f545950455f" +
-        "5f006d61785f656e7472696573006b65" +
-        "790076616c7565006d616332706f7274" +
-        "5f6d6170006368617200706173735f6d" +
-        "61635f6d6170007372636d616332636f" +
-        "756e745f6d6170006270665f6d61705f" +
-        "6c6f6f6b75705f656c656d006270665f" +
-        "726564697265637400756e7369676e65" +
-        "6420696e74005f5f753332006270665f" +
-        "6d61705f7570646174655f656c656d00" +
-        "5844505f41424f52544544005844505f" +
-        "44524f50005844505f50415353005844" +
-        "505f5458005844505f52454449524543" +
-        "54007864705f616374696f6e00756e73" +
-        "69676e65642063686172007265646972" +
-        "6563745f706b745f62795f6d61630063" +
-        "7478006461746100646174615f656e64" +
-        "00646174615f6d65746100696e677265" +
-        "73735f6966696e6465780072785f7175" +
-        "6575655f696e64657800656772657373" +
-        "5f6966696e646578007864705f6d6400" +
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-        "5f707472006f75747075745f69666163" +
-        "6500706b745f636f756e745f62795f73" +
-        "72636d616300636e745f70747200636e" +
-        "74007864705f736f636b007265646972" +
-        "6563745f726573003c00000005000800" +
         "00000000000000000000000000000000" +
-        "00000000000000000800000000000000" +
-        "a8000000000000009feb010018000000" +
-        "0000000004030000040300007a040000" +
-        "00000000000000020300000001000000" +
-        "00000001040000002000000100000000" +
-        "00000003000000000200000004000000" +
-        "11000000050000000000000104000000" +
-        "20000000000000000000000206000000" +
-        "00000000000000030000000002000000" +
-        "04000000800000000000000000000002" +
-        "02000000000000000400000420000000" +
-        "1900000001000000000000001e000000" +
-        "05000000400000002a00000007000000" +
-        "800000002e00000007000000c0000000" +
-        "340000000000000e0800000001000000" +
-        "00000000000000020b00000000000000" +
-        "00000003000000000200000004000000" +
-        "0900000000000000000000020d000000" +
-        "00000000000000030000000002000000" +
-        "04000000001000000000000000000002" +
-        "100000003d0000000000000101000000" +
-        "08000001000000000000000300000000" +
-        "0f000000040000000600000000000000" +
-        "0400000420000000190000000a000000" +
-        "000000001e0000000c00000040000000" +
-        "2a0000000e000000800000002e000000" +
-        "07000000c0000000420000000000000e" +
-        "11000000010000000000000000000002" +
-        "0f000000000000000400000420000000" +
-        "190000000a000000000000001e000000" +
-        "0c000000400000002a0000000e000000" +
-        "800000002e00000013000000c0000000" +
-        "4f0000000000000e1400000001000000" +
-        "00000000040000042000000019000000" +
-        "0a000000000000001e0000000c000000" +
-        "400000002a0000000e00000080000000" +
-        "2e00000007000000c00000005c000000" +
-        "0000000e160000000100000000000000" +
-        "00000002190000006d00000006000004" +
-        "18000000740000001a00000000000000" +
-        "790000001a0000002000000082000000" +
-        "1a000000400000008c0000001a000000" +
-        "600000009c0000001a00000080000000" +
-        "ab0000001a000000a0000000ba000000" +
-        "000000081b000000c000000000000001" +
-        "0400000020000000000000000100000d" +
-        "02000000cd00000018000000d1000000" +
-        "0100000c1c000000740400000400000f" +
-        "00000000090000000000000020000000" +
-        "12000000000000002000000015000000" +
-        "00000000200000001700000000000000" +
-        "2000000000696e74005f5f4152524159" +
-        "5f53495a455f545950455f5f00747970" +
-        "65006d61785f656e7472696573006b65" +
-        "790076616c75650078736b735f6d6170" +
-        "0063686172006d616332706f72745f6d" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000601000005000800" +
+        "1200000048000000540000005a000000" +
+        "650000006b0000007200000080000000" +
+        "870000008f000000970000009f000000" +
+        "a7000000af000000b7000000c6000000" +
+        "ce000000dd000000f600000004000801" +
+        "510408f8040156000418480151000420" +
+        "30015204305001530004205001520004" +
+        "709801015100047888010157048801a0" +
+        "010152000478f00101570004b001d001" +
+        "01520004e001d0020158000490029003" +
+        "01500004a002c80201510004b802c804" +
+        "01570004c802800301510004d002e002" +
+        "015804e002880301520004d002f00201" +
+        "5800049003e003015004e80380040150" +
+        "00049803a8030311019f04a803e80302" +
+        "7a0404f003f80301510004a804c80401" +
+        "5000011101252513050325721710171b" +
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+        "49000000010000000300000000000000" +
+        "0000000000000000b802000000000000" +
+        "a0000000000000000000000000000000" +
+        "08000000000000000000000000000000" +
+        "22000000010000000000000000000000" +
+        "00000000000000005803000000000000" +
+        "0a010000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "01000000010000000000000000000000" +
+        "00000000000000006204000000000000" +
+        "9b010000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "c7000000010000000000000000000000" +
+        "0000000000000000fd05000000000000" +
+        "13040000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "c3000000090000004000000000000000" +
+        "0000000000000000001f000000000000" +
+        "50000000000000001800000008000000" +
+        "08000000000000001000000000000000" +
+        "36000000010000000000000000000000" +
+        "0000000000000000100a000000000000" +
+        "d0000000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "32000000090000004000000000000000" +
+        "0000000000000000501f000000000000" +
+        "2003000000000000180000000a000000" +
+        "08000000000000001000000000000000" +
+        "4f000000010000003000000000000000" +
+        "0000000000000000e00a000000000000" +
+        "54020000000000000000000000000000" +
+        "01000000000000000100000000000000" +
+        "6e000000010000000000000000000000" +
+        "0000000000000000340d000000000000" +
+        "48000000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "6a000000090000004000000000000000" +
+        "00000000000000007022000000000000" +
+        "8000000000000000180000000d000000" +
+        "08000000000000001000000000000000" +
+        "1b010000010000000000000000000000" +
+        "00000000000000007c0d000000000000" +
+        "ec090000000000000000000000000000" +
+        "04000000000000000000000000000000" +
+        "17010000090000004000000000000000" +
+        "0000000000000000f022000000000000" +
+        "5000000000000000180000000f000000" +
+        "08000000000000001000000000000000" +
+        "19000000010000000000000000000000" +
+        "00000000000000006817000000000000" +
+        "00030000000000000000000000000000" +
+        "04000000000000000000000000000000" +
+        "15000000090000004000000000000000" +
+        "00000000000000004023000000000000" +
+        "d0020000000000001800000011000000" +
+        "08000000000000001000000000000000" +
+        "f0000000010000000000000000000000" +
+        "0000000000000000681a000000000000" +
+        "28000000000000000000000000000000" +
+        "08000000000000000000000000000000" +
+        "ec000000090000004000000000000000" +
+        "00000000000000001026000000000000" +
+        "20000000000000001800000013000000" +
+        "08000000000000001000000000000000" +
+        "e0000000010000000000000000000000" +
+        "0000000000000000901a000000000000" +
+        "3e010000000000000000000000000000" +
+        "01000000000000000000000000000000" +
+        "dc000000090000004000000000000000" +
+        "00000000000000003026000000000000" +
+        "90000000000000001800000015000000" +
+        "08000000000000001000000000000000" +
+        "5a000000010000003000000000000000" +
+        "0000000000000000ce1b000000000000" +
+        "c9000000000000000000000000000000" +
+        "01000000000000000100000000000000" +
+        "0f010000020000000000000000000000" +
+        "0000000000000000981c000000000000" +
+        "f801000000000000010000000f000000" +
+        "08000000000000001800000000000000").persist();
 
     private static final ByteArray _HANDLE_DST_PORT_EBPF_OBJECT = ByteArray.from(
         "7f454c46020101000000000000000000" +
@@ -697,6 +800,8 @@ private Prebuilt() {
         "bf06000000000000bf60000000000000" +
         "95000000000000000000000000000000" +
         "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
         "0000000000000000d700000005000800" +
         "0900000024000000300000003e000000" +
         "6500000073000000870000009b000000" +
@@ -1173,6 +1278,8 @@ private Prebuilt() {
         "42305f3135004c4242305f3133004c42" +
         "42305f31300000000000000000000000" +
         "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
+        "00000000000000000000000000000000" +
         "0000000000000000de00000003000000" +
         "00000000000000000000000000000000" +
         "281f0000000000001e01000000000000" +
@@ -1273,7 +1380,7 @@ private Prebuilt() {
 
     /**
      * default.c
-     * md5sum(default.o): cae0a2a6adcba86a49aeeba164ecdcda
+     * md5sum(default.o): 8df266ca0ed22071d5cb8cacaa1d04ec
      */
     public static final ByteArray DEFAULT_PROG = _DEFAULT_PROG;
     /**
diff --git a/base/src/main/java/io/vproxy/xdp/SharedBPFMapHolder.java b/base/src/main/java/io/vproxy/xdp/SharedBPFMapHolder.java
index ccad2f0d..4a63555a 100644
--- a/base/src/main/java/io/vproxy/xdp/SharedBPFMapHolder.java
+++ b/base/src/main/java/io/vproxy/xdp/SharedBPFMapHolder.java
@@ -1,7 +1,5 @@
 package io.vproxy.xdp;
 
-import io.vproxy.base.util.coll.Tuple;
-
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
@@ -17,25 +15,29 @@ public static SharedBPFMapHolder getInstance() {
     private SharedBPFMapHolder() {
     }
 
-    private record Storage(BPFObject bpfObject, BPFMap bpfMap, AtomicInteger refCount) {
+    private record Storage(BPFObjectAndMapProviderResultTuple tup, AtomicInteger refCount) {
+    }
+
+    public record BPFObjectAndMapProviderResultTuple(BPFObject object, BPFMap mac2portMap, BPFMap devMap) {
     }
 
     private final Map<String, Storage> bpfMaps = new HashMap<>();
 
     public interface BPFObjAndMapProvider {
-        Tuple<BPFObject, BPFMap> get() throws IOException;
+        BPFObjectAndMapProviderResultTuple get() throws IOException;
     }
 
-    public synchronized BPFMap getOrCreate(String mapGroup, BPFObjAndMapProvider f) throws IOException {
+    public synchronized BPFObjectAndMapProviderResultTuple
+    getOrCreate(String mapGroup, BPFObjAndMapProvider f) throws IOException {
         if (bpfMaps.containsKey(mapGroup)) {
             var storage = bpfMaps.get(mapGroup);
             storage.refCount.incrementAndGet();
-            return storage.bpfMap;
+            return storage.tup;
         }
         var tup = f.get();
-        var storage = new Storage(tup._1, tup._2, new AtomicInteger(1));
+        var storage = new Storage(tup, new AtomicInteger(1));
         bpfMaps.put(mapGroup, storage);
-        return tup._2;
+        return tup;
     }
 
     public synchronized void release(String mapGroup) {
@@ -45,7 +47,7 @@ public synchronized void release(String mapGroup) {
         }
         if (s.refCount.decrementAndGet() == 0) {
             bpfMaps.remove(mapGroup);
-            s.bpfObject.release(false);
+            s.tup.object.release(false);
         }
     }
 }
diff --git a/build.gradle b/build.gradle
index 66678215..4c67a018 100644
--- a/build.gradle
+++ b/build.gradle
@@ -551,6 +551,18 @@ project(':test') {
             "submodules/vpxdp/submodules/xdp-tools/lib/libxdp")
         systemProperty("vfd", "posix")
         main = "io.vproxy.poc.XDPPoc"
+        def ifname = System.getProperty("ifname")
+        def offload = System.getProperty("offload")
+        doLast {
+            if (ifname == null) {
+                throw new Exception("You must specify -Difname={...}")
+            }
+            var ls = [ifname]
+            if (offload != null) {
+                ls.add(offload)
+            }
+            args = ls
+        }
     }
 
     task QuicPoc(type: JavaExec) {
diff --git a/core/src/main/java/io/vproxy/vswitch/MacTable.java b/core/src/main/java/io/vproxy/vswitch/MacTable.java
index afa899b2..b7423a09 100644
--- a/core/src/main/java/io/vproxy/vswitch/MacTable.java
+++ b/core/src/main/java/io/vproxy/vswitch/MacTable.java
@@ -129,7 +129,7 @@ void record() {
                 // the mac is already registered on another iface
                 // remove that iface
                 MacEntry entry = macMap.get(mac);
-                entry.cancel();
+                entry.cancel(false);
             }
             entries.add(this);
             macMap.put(mac, this);
@@ -148,12 +148,15 @@ void record() {
         }
 
         private void tryOffload() {
-            if (!(iface instanceof XDPIface xdpIface) || !xdpIface.params.offload()) {
+            if (!(iface instanceof XDPIface xdpIface) || !xdpIface.params.pktswOffloaded()) {
                 return;
             }
             if (xdpIface.params.bpf().mac2port() == null) {
                 return;
             }
+            if (xdpIface.params.bpf().port2dev() == null) {
+                return;
+            }
             if (xdpIface.params.bpf().srcmac2count() == null) {
                 return;
             }
@@ -168,10 +171,10 @@ private void tryOffload() {
             }
 
             var mac2portMap = xdpIface.params.bpf().mac2port();
-            if (mac2portMap == null) {
-                return;
-            }
+            var port2devMap = xdpIface.params.bpf().port2dev();
             try {
+                port2devMap.putNetif(xdpIface.nic);
+                // first add port2dev map, then add mac2port map, so that the dev would be valid
                 mac2portMap.putNetif(mac, xdpIface.nic);
                 Logger.trace(LogType.ALERT, "mac entry " + iface.name() + " -> " + mac + " recorded into xdp offload mac map");
             } catch (IOException e) {
@@ -183,9 +186,13 @@ private void tryOffload() {
 
         @Override
         public void cancel() {
+            cancel(true);
+        }
+
+        public void cancel(boolean isTimeout) {
             super.cancel();
 
-            if (offloaded) {
+            if (isTimeout && offloaded) {
                 if (hasOffloadedPacketPassed()) {
                     start();
                     return;
@@ -208,13 +215,18 @@ public void cancel() {
         }
 
         private boolean hasOffloadedPacketPassed() {
-            assert iface instanceof XDPIface;
-            assert ((XDPIface) iface).params.bpf().srcmac2count() != null;
+            if (!(iface instanceof XDPIface xdpIface)) {
+                return false;
+            }
+            if (xdpIface.params.bpf().srcmac2count() == null) {
+                return false;
+            }
 
             try {
-                int n = ((XDPIface) iface).params.bpf().srcmac2count().getInt(mac);
+                int n = xdpIface.params.bpf().srcmac2count().getInt(mac);
                 assert Logger.lowLevelDebug("fetched packet count from xdp offload map: " + n + ", last recorded: " + offloadedCount);
                 if (n != offloadedCount) {
+                    assert Logger.lowLevelDebug("mac entry " + iface.name() + " -> " + mac + " has packets passed, old: " + offloadedCount + ", new: " + n);
                     offloadedCount = n;
                     return true;
                 }
@@ -243,7 +255,7 @@ private void clearOffload() {
                 mac2portMap.remove(mac);
                 Logger.trace(LogType.ALERT, "mac entry removed from xdp offload mac map: " + iface.name() + " -> " + mac);
             } catch (IOException e) {
-                Logger.error(LogType.SYS_ERROR, "failed to removed mac from xdp offload mac map: " + iface.name() + " -> " + mac);
+                Logger.error(LogType.SYS_ERROR, "failed to removed mac from xdp offload mac map: " + iface.name() + " -> " + mac, e);
             }
         }
 
@@ -252,6 +264,7 @@ public void resetTimer() {
             if (getTimeout() == -1) {
                 return;
             }
+            hasOffloadedPacketPassed(); // will update offloadedCount field
             super.resetTimer();
         }
 
@@ -259,13 +272,17 @@ public boolean isOffloaded() {
             return offloaded;
         }
 
+        public int getOffloadedCount() {
+            return offloadedCount;
+        }
+
         @Override
         public String toString() {
             return "MacEntry{" +
-                "mac=" + mac +
-                ", iface=" + iface.name() +
-                ", offloaded=" + offloaded +
-                '}';
+                   "mac=" + mac +
+                   ", iface=" + iface.name() +
+                   ", offloaded=" + offloaded + "(" + offloadedCount + ")" +
+                   '}';
         }
     }
 
diff --git a/core/src/main/java/io/vproxy/vswitch/iface/XDPIface.java b/core/src/main/java/io/vproxy/vswitch/iface/XDPIface.java
index 1be78f9e..bcbc152a 100644
--- a/core/src/main/java/io/vproxy/vswitch/iface/XDPIface.java
+++ b/core/src/main/java/io/vproxy/vswitch/iface/XDPIface.java
@@ -4,7 +4,6 @@
 import io.vproxy.base.selector.HandlerContext;
 import io.vproxy.base.selector.SelectorEventLoop;
 import io.vproxy.base.util.ByteArray;
-import io.vproxy.base.util.Consts;
 import io.vproxy.base.util.LogType;
 import io.vproxy.base.util.Logger;
 import io.vproxy.base.util.thread.VProxyThread;
@@ -21,6 +20,7 @@
 
 import java.io.IOException;
 import java.lang.foreign.MemorySegment;
+import java.util.ArrayList;
 
 public class XDPIface extends Iface {
     public final String nic;
@@ -35,22 +35,23 @@ public class XDPIface extends Iface {
 
     public record BPFInfo(
         BPFObject bpfObject,
-        BPFMap xsk, BPFMap mac2port, BPFMap srcmac2count,
-        String mac2portSharedMapGroup) {
-
+        BPFMap xsk, BPFMap mac2port, BPFMap port2dev, BPFMap srcmac2count, BPFMap passmac,
+        String mac2portSharedMapGroup
+    ) {
         public BPFInfo(BPFObject bpfObject, BPFMap xsk) {
-            this(bpfObject, xsk, null, null, null);
+            this(bpfObject, xsk, null, null, null, null, null);
         }
     }
 
     public record XDPParams(int queueId, int rxRingSize, int txRingSize, BPFMode mode,
-                            boolean zeroCopy, int busyPollBudget, boolean rxGenChecksum, boolean offload,
+                            boolean zeroCopy, int busyPollBudget, boolean rxGenChecksum,
+                            boolean pktswOffloaded, boolean csumOffloaded,
                             BPFInfo bpf) {
     }
 
     public XDPIface(String nic, int vrf, UMem umem, XDPParams params) {
         // check offload
-        if (params.offload) {
+        if (params.pktswOffloaded) {
             if (params.bpf.mac2port == null || params.bpf.srcmac2count == null) {
                 throw new IllegalArgumentException("offload is true, but macMap is not provided");
             }
@@ -113,7 +114,7 @@ public void sendPacket(PacketBuffer pkb) {
                 assert Logger.lowLevelDebug("update pktaddr(" + pktaddr + ") and pktlen(" + pktlen + ")");
                 chunk.setPktAddr(pktaddr);
                 chunk.setPktLen(pktlen);
-                chunk.setCsumFlags(SwitchUtils.checksumFlagsFor(pkb.pkt, umem.metaLen));
+                chunk.setCsumFlags(SwitchUtils.checksumFlagsFor(pkb.pkt, umem.metaLen, params.csumOffloaded));
                 if (chunk.getCsumFlags() != 0) {
                     statistics.incrCsumSkip();
                 }
@@ -142,9 +143,9 @@ public void sendPacket(PacketBuffer pkb) {
         }
         ByteArray pktData = pkb.pkt.getRawPacket(AbstractPacket.FLAG_CHECKSUM_UNNECESSARY);
 
-        long pktaddr = chunk.getAddr() + Consts.XDP_HEADROOM_DRIVER_RESERVED;
-        long availableSpace = chunk.getEndAddr() - chunk.getAddr() - Consts.XDP_HEADROOM_DRIVER_RESERVED;
-        var csumFlags = SwitchUtils.checksumFlagsFor(pkb.pkt, umem.metaLen);
+        long pktaddr = chunk.getAddr() + umem.headroom;
+        long availableSpace = chunk.getEndAddr() - chunk.getAddr() - umem.headroom;
+        var csumFlags = SwitchUtils.checksumFlagsFor(pkb.pkt, umem.metaLen, params.csumOffloaded);
         if ((csumFlags & XDPConsts.VP_CSUM_XDP_OFFLOAD) != 0) {
             pktaddr += umem.metaLen;
             availableSpace -= umem.metaLen;
@@ -248,7 +249,19 @@ public String name() {
 
     @Override
     protected String toStringExtra() {
-        return "#q=" + params.queueId + ",umem=" + umem.alias + ",vrf:" + vrf + (params.offload ? ",offload" : "");
+        var off = "";
+        if (params.pktswOffloaded || params.csumOffloaded) {
+            off = ",offload=";
+            var ls = new ArrayList<String>();
+            if (params.pktswOffloaded) {
+                ls.add("pktsw");
+            }
+            if (params.csumOffloaded) {
+                ls.add("csum");
+            }
+            off += String.join(",", ls);
+        }
+        return "#q=" + params.queueId + ",umem=" + umem.alias + ",vrf:" + vrf + off;
     }
 
     private class XDPHandler implements Handler<XDPSocket> {
@@ -319,4 +332,83 @@ public void removed(HandlerContext<XDPSocket> ctx) {
             callback.alertDeviceDown(XDPIface.this);
         }
     }
+
+    public static class XDPParamsBuilder {
+        public XDPParamsBuilder$1 setQueueId(int queueId) {
+            return new XDPParamsBuilder$1(queueId);
+        }
+
+        public record XDPParamsBuilder$1(int queueId) {
+            public XDPParamsBuilder$2 setBPFInfo(BPFInfo bpf) {
+                return new XDPParamsBuilder$2(queueId, bpf);
+            }
+        }
+    }
+
+    public static class XDPParamsBuilder$2 {
+        private final int queueId;
+        private final BPFInfo bpf;
+
+        private int rxRingSize = SwitchUtils.DEFAULT_RX_TX_CHUNKS;
+        private int txRingSize = SwitchUtils.DEFAULT_RX_TX_CHUNKS;
+        private BPFMode mode = BPFMode.SKB;
+        private boolean zeroCopy = false;
+        private int busyPollBudget = 0;
+        private boolean rxGenChecksum = false;
+        private boolean pktswOffloaded = false;
+        private boolean csumOffloaded = false;
+
+        public XDPParamsBuilder$2(int queueId, BPFInfo bpf) {
+            this.queueId = queueId;
+            this.bpf = bpf;
+        }
+
+        public XDPParams build() {
+            return new XDPParams(
+                queueId, rxRingSize, txRingSize, mode,
+                zeroCopy, busyPollBudget, rxGenChecksum,
+                pktswOffloaded, csumOffloaded,
+                bpf);
+        }
+
+        public XDPParamsBuilder$2 setRxRingSize(int rxRingSize) {
+            this.rxRingSize = rxRingSize;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setTxRingSize(int txRingSize) {
+            this.txRingSize = txRingSize;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setMode(BPFMode mode) {
+            this.mode = mode;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setZeroCopy(boolean zeroCopy) {
+            this.zeroCopy = zeroCopy;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setBusyPollBudget(int busyPollBudget) {
+            this.busyPollBudget = busyPollBudget;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setRxGenChecksum(boolean rxGenChecksum) {
+            this.rxGenChecksum = rxGenChecksum;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setPktswOffloaded(boolean pktswOffloaded) {
+            this.pktswOffloaded = pktswOffloaded;
+            return this;
+        }
+
+        public XDPParamsBuilder$2 setCsumOffloaded(boolean csumOffloaded) {
+            this.csumOffloaded = csumOffloaded;
+            return this;
+        }
+    }
 }
diff --git a/core/src/main/java/io/vproxy/vswitch/util/SwitchUtils.java b/core/src/main/java/io/vproxy/vswitch/util/SwitchUtils.java
index 09744f60..88c0bc8d 100644
--- a/core/src/main/java/io/vproxy/vswitch/util/SwitchUtils.java
+++ b/core/src/main/java/io/vproxy/vswitch/util/SwitchUtils.java
@@ -4,7 +4,6 @@
 import io.vproxy.base.util.Consts;
 import io.vproxy.base.util.Logger;
 import io.vproxy.base.util.Utils;
-import io.vproxy.base.util.coll.Tuple;
 import io.vproxy.vfd.*;
 import io.vproxy.vpacket.*;
 import io.vproxy.vpacket.conntrack.tcp.TcpNat;
@@ -26,7 +25,8 @@
 public class SwitchUtils {
     public static final int TOTAL_RCV_BUF_LEN = 4096;
     public static final int RCV_HEAD_PRESERVE_LEN = 128;
-    public static final int RX_TX_CHUNKS = 2048;
+    public static final int DEFAULT_UMEM_CHUNKS = 4096;
+    public static final int DEFAULT_RX_TX_CHUNKS = 256;
     public static final MacAddress BROADCAST_MAC = new MacAddress("ff:ff:ff:ff:ff:ff");
     public static final MacAddress ZERO_MAC = new MacAddress("00:00:00:00:00:00");
 
@@ -49,7 +49,7 @@ public static void checkAndUpdateMss(PacketBuffer pkb, Iface iface) {
             return;
         }
         int maxMss = iface.getParams().getBaseMTU() - iface.getOverhead() - 20 /* tcp common */
-            - 20 /* possible options in normal tcp packets, and also ip headers/opts */;
+                     - 20 /* possible options in normal tcp packets, and also ip headers/opts */;
         if (!(pkb.pkt.getPacket() instanceof AbstractIpPacket)) {
             return; // only tcp requires modification
         }
@@ -294,8 +294,8 @@ public static FilterResult applyFilters(ArrayList<PacketFilter> filters, PacketF
         return FilterResult.PASS;
     }
 
-    public static int checksumFlagsFor(EthernetPacket pkt, int metaLen) {
-        assert Logger.lowLevelDebug("checksumFlagsFor(" + pkt + ", " + metaLen + ")");
+    public static int checksumFlagsFor(EthernetPacket pkt, int metaLen, boolean offloadEnabled) {
+        assert Logger.lowLevelDebug("checksumFlagsFor(" + pkt + ", " + metaLen + ", " + offloadEnabled + ")");
         if (!(pkt.getPacket() instanceof AbstractIpPacket)) {
             return 0;
         }
@@ -305,7 +305,7 @@ public static int checksumFlagsFor(EthernetPacket pkt, int metaLen) {
             ret |= XDPConsts.VP_CSUM_IP;
         }
         if (ip.getPacket().isRequireUpdatingChecksum()) {
-            if (NativeXDP.supportTxMetadata && metaLen >= 16) {
+            if (offloadEnabled && NativeXDP.supportTxMetadata && metaLen >= 16) {
                 ret |= XDPConsts.VP_CSUM_UP_PSEUDO | XDPConsts.VP_CSUM_XDP_OFFLOAD;
             } else {
                 ret |= XDPConsts.VP_CSUM_UP;
@@ -319,7 +319,7 @@ public static boolean executeTcpNat(PacketBuffer pkb, TcpNat nat) {
         assert Logger.lowLevelDebug("executeTcpNat(" + pkb + ", " + nat + ")");
         var pkt = pkb.tcpPkt;
         boolean isBackhaul = pkb.ipPkt.getSrc().equals(nat._2.remote.getAddress()) &&
-            pkb.tcpPkt.getSrcPort() == nat._2.remote.getPort();
+                             pkb.tcpPkt.getSrcPort() == nat._2.remote.getPort();
         assert Logger.lowLevelDebug("isBackhaul = " + isBackhaul);
 
         if (pkt.isRst()) {
@@ -358,7 +358,7 @@ public static boolean executeTcpNat(PacketBuffer pkb, TcpNat nat) {
                                     handled = true;
                                 } else {
                                     assert Logger.lowLevelDebug("received unexpected packet, " +
-                                        "the proxy protocol header is not sent yet, but received !syn + ack packet from the passive side");
+                                                                "the proxy protocol header is not sent yet, but received !syn + ack packet from the passive side");
                                     return false; // drop
                                 }
                             }
@@ -504,7 +504,7 @@ public static void executeUdpNat(PacketBuffer pkb, UdpNat nat) {
         assert Logger.lowLevelDebug("executeUdpNat(" + pkb + ", " + nat + ")");
         var pkt = pkb.udpPkt;
         boolean isBackhaul = pkb.ipPkt.getSrc().equals(nat._2.remote.getAddress()) &&
-            pkb.udpPkt.getSrcPort() == nat._2.remote.getPort();
+                             pkb.udpPkt.getSrcPort() == nat._2.remote.getPort();
         assert Logger.lowLevelDebug("isBackhaul = " + isBackhaul);
 
         nat.resetTimer();
@@ -618,7 +618,7 @@ public interface BPFObjectCreator {
         BPFObject get(Map<String, BPFMap> reusedMaps) throws IOException;
     }
 
-    public record GetSharedMapGroupResult(BPFObject object, BPFMap map, String groupName) {
+    public record GetSharedMapGroupResult(BPFObject object, BPFMap mac2portMap, BPFMap port2devMap, String groupName) {
         public void release(boolean detach) {
             object.release(detach);
             SharedBPFMapHolder.getInstance().release(groupName);
@@ -628,21 +628,24 @@ public void release(boolean detach) {
     public static GetSharedMapGroupResult createBPFObjectWithReusedMaps(Switch sw, int vrf,
                                                                         BPFObjectCreator fn) throws IOException {
         var mapGroupName = "mac2port:" + sw.alias + ":" + vrf;
-        var mapName = Prebuilt.DEFAULT_MAC_TO_PORT_MAP_NAME;
+        var mac2portName = Prebuilt.DEFAULT_MAC_TO_PORT_MAP_NAME;
+        var devMapName = Prebuilt.DEFAULT_PORT_TO_DEV_MAP_NAME;
 
-        var res = SharedBPFMapHolder.getInstance().getOrCreate(mapGroupName, () -> {
+        var tup = SharedBPFMapHolder.getInstance().getOrCreate(mapGroupName, () -> {
             var obj = BPFObject.load(Prebuilt.DEFAULT_PROG);
-            BPFMap map;
+            BPFMap mac2portMap;
+            BPFMap port2devMap;
             try {
-                map = obj.getMap(mapName);
+                mac2portMap = obj.getMap(mac2portName);
+                port2devMap = obj.getMap(devMapName);
             } catch (IOException e) {
                 obj.release(true);
                 throw e;
             }
-            return new Tuple<>(obj, map);
+            return new SharedBPFMapHolder.BPFObjectAndMapProviderResultTuple(obj, mac2portMap, port2devMap);
         });
 
-        var reuseMap = Map.of(mapName, res);
+        var reuseMap = Map.of(mac2portName, tup.mac2portMap(), devMapName, tup.devMap());
 
         BPFObject obj;
         try {
@@ -651,14 +654,16 @@ public static GetSharedMapGroupResult createBPFObjectWithReusedMaps(Switch sw, i
             SharedBPFMapHolder.getInstance().release(mapGroupName);
             throw e;
         }
-        BPFMap map;
+        BPFMap mac2portMap;
+        BPFMap port2devMap;
         try {
-            map = obj.getMap(mapName);
+            mac2portMap = obj.getMap(mac2portName);
+            port2devMap = obj.getMap(devMapName);
         } catch (IOException e) {
             obj.release(true);
             SharedBPFMapHolder.getInstance().release(mapGroupName);
             throw e;
         }
-        return new GetSharedMapGroupResult(obj, map, mapGroupName);
+        return new GetSharedMapGroupResult(obj, mac2portMap, port2devMap, mapGroupName);
     }
 }
diff --git a/extended/src/main/java/io/vproxy/vproxyx/websocks/uot/UdpOverTcpSetup.java b/extended/src/main/java/io/vproxy/vproxyx/websocks/uot/UdpOverTcpSetup.java
index 31257535..dd82018d 100644
--- a/extended/src/main/java/io/vproxy/vproxyx/websocks/uot/UdpOverTcpSetup.java
+++ b/extended/src/main/java/io/vproxy/vproxyx/websocks/uot/UdpOverTcpSetup.java
@@ -91,9 +91,10 @@ public static FDs setup(boolean client, int port, String nicname, EventLoopGroup
 
         UMem umem = sw.addUMem("umem0", 256, 128, 128, 2048);
         XDPIface iface = sw.addXDP(nicname, 1, umem,
-            new XDPIface.XDPParams(0, 128, 128, BPFMode.SKB,
-                false, 0, false, false,
-                new XDPIface.BPFInfo(obj, xskMap)));
+            new XDPIface.XDPParamsBuilder()
+                .setQueueId(0)
+                .setBPFInfo(new XDPIface.BPFInfo(obj, xskMap))
+                .build());
 
         UdpOverTcpPacketFilter filter = new UdpOverTcpPacketFilter(client);
         iface.addIngressFilter(filter);
diff --git a/submodules/vpxdp b/submodules/vpxdp
index 4eb940f5..16da4da9 160000
--- a/submodules/vpxdp
+++ b/submodules/vpxdp
@@ -1 +1 @@
-Subproject commit 4eb940f5fd4c2836406b2f20def630460c8f1817
+Subproject commit 16da4da961f89e4d643c401ec09a0dfd5bccb183
diff --git a/test/src/test/java/io/vproxy/poc/XDPPoc.java b/test/src/test/java/io/vproxy/poc/XDPPoc.java
index 238557e0..4218e2ec 100644
--- a/test/src/test/java/io/vproxy/poc/XDPPoc.java
+++ b/test/src/test/java/io/vproxy/poc/XDPPoc.java
@@ -21,6 +21,23 @@ public static void main(String[] args) throws Exception {
             return;
         }
         String ifname = args[0];
+        boolean csumOffloaded = false;
+        for (var i = 1; i < args.length; i++) {
+            var arg = args[i];
+            if (arg.startsWith("offload=")) {
+                var v = arg.substring("offload=".length());
+                var split = v.split(",");
+                for (var s : split) {
+                    s = s.trim();
+                    if (s.equals("csum")) {
+                        csumOffloaded = true;
+                    } else {
+                        Logger.error(LogType.ALERT, "unexpected argument " + arg);
+                        return;
+                    }
+                }
+            }
+        }
 
         BPFObject bpfobj = BPFObject.loadAndAttachToNic(
             ifname,
@@ -44,10 +61,10 @@ public static void main(String[] args) throws Exception {
             new Annotations());
 
         UMem umem = sw.addUMem("poc-umem", 64, 32, 32, 4096);
-        sw.addXDP(ifname, 1, umem, new XDPIface.XDPParams(
-            0, 32, 32, BPFMode.SKB,
-            false, 0, false, false,
-            new XDPIface.BPFInfo(bpfobj, xskMap)
-        ));
+        sw.addXDP(ifname, 1, umem, new XDPIface.XDPParamsBuilder()
+            .setQueueId(0)
+            .setBPFInfo(new XDPIface.BPFInfo(bpfobj, xskMap))
+            .setCsumOffloaded(csumOffloaded)
+            .build());
     }
 }