RuntimeError onOpenWRT : Tried to add prefixlen=60 multiple times to br-lan, it was already: 64

[zengelan]

HI,
i am trying to use this on the recent OpenWRT version OpenWrt 24.10.0-rc5 r28304-6dacba30a7 / LuCI openwrt-24.10 branch 25.044.01357~67d27ad

but it results in the following RuntimeError:
Tried to add prefixlen=60 multiple times to br-lan, it was already: 64

trying to get interfaces from ifcfg module:

root@OpenWrt:~# python3
Python 3.11.7 (main, Jan 12 2025, 12:34:28) [GCC 13.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ifcfg
>>> ifcfg.interfaces()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.11/site-packages/ifcfg/__init__.py", line 70, in interfaces
    return Parser(ifconfig=ifconfig).interfaces
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/ifcfg/parser.py", line 34, in __init__
    self.parse(self.ifconfig_data)
  File "/usr/lib/python3.11/site-packages/ifcfg/parser.py", line 91, in parse
    raise RuntimeError(
RuntimeError: Tried to add prefixlen=60 multiple times to br-lan, it was already: 64

ifconfig output from openWRT shell:

root@OpenWrt:~# ifconfig -a
br-lan    Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          inet addr:192.168.37.1  Bcast:192.168.37.255  Mask:255.255.255.0
          inet6 addr: fe80::26f5:a2ff:fec3:5ed8/64 Scope:Link
          inet6 addr: fd43:cd9:1ffe::1/60 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3012145 errors:0 dropped:30860 overruns:0 frame:0
          TX packets:2687644 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2571684922 (2.3 GiB)  TX bytes:2251121370 (2.0 GiB)

eth0      Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          inet6 addr: fe80::26f5:a2ff:fec3:5ed8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1508  Metric:1
          RX packets:5700550 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5363005 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1024
          RX bytes:4915997241 (4.5 GiB)  TX bytes:4752468599 (4.4 GiB)
          Interrupt:43

lan1      Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:51411 errors:0 dropped:0 overruns:0 frame:0
          TX packets:23033 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:9065804 (8.6 MiB)  TX bytes:2163506 (2.0 MiB)

lan2      Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:269274 errors:0 dropped:78 overruns:0 frame:0
          TX packets:94965 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:64248695 (61.2 MiB)  TX bytes:8911236 (8.4 MiB)

lan3      Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2035565 errors:0 dropped:5 overruns:0 frame:0
          TX packets:2245569 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2177326371 (2.0 GiB)  TX bytes:2165895945 (2.0 GiB)

lan4      Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:D8
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:732231 errors:0 dropped:8145 overruns:0 frame:0
          TX packets:335169 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:368607939 (351.5 MiB)  TX bytes:75378582 (71.8 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:294066 errors:0 dropped:0 overruns:0 frame:0
          TX packets:294066 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:155429851 (148.2 MiB)  TX bytes:155429851 (148.2 MiB)

mlan0     Link encap:Ethernet  HWaddr 24:F5:A2:C3:5E:DB
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wan       Link encap:Ethernet  HWaddr 26:F5:A2:C3:5E:D8
          inet addr:192.168.52.208  Bcast:192.168.52.255  Mask:255.255.255.0
          inet6 addr: fe80::24f5:a2ff:fec3:5ed8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2612069 errors:0 dropped:26 overruns:0 frame:0
          TX packets:2664252 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2251144032 (2.0 GiB)  TX bytes:2457213644 (2.2 GiB)

root@OpenWrt:~#

[max-pfeiffer]

+1 here

OpenWrt 23.05.5

[benjaoming]

if you can contribute a fix, you are most welcome. Please include data for a test case that reproduces this.

I should have access to release a new version still.