[FS#3639] Repeated failure of wireless interfaces, seemingly related to IGMP Snooping

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Wed Feb 24 04:28:31 EST 2021


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A new Flyspray task has been opened.  Details are below. 

User who did this - Greg (nohspamjose) 

Attached to Project - OpenWrt/LEDE Project
Summary - Repeated failure of wireless interfaces, seemingly related to IGMP Snooping
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
  
Model: Linksys WRT3200ACM
Architecture: ARMv7 Processor rev 1 (v7l)
Firmware Version: OpenWrt 19.07.7 r11306-c4a6851c72 / LuCI openwrt-19.07 branch git-21.054.03371-3b137b5
Kernel Version: 4.14.221
 
In the last four to six days the wireless on my network kept failing (particularly overnight - but that may be less to do with time of day and more to do with lease expiry??). I searched and found that someone else resolved this back in around 2018 by enabling IGMP Snooping and then rebooting their router (https://forum.openwrt.org/t/wifi-up-device-connected-but-no-internet/) - That worked for me but only temporarily. This morning, even though (on LuCI and via SSH) I can see IGMP Snooping is still enabled (LAN interface), the same problem occurred - all the wireless devices can connect to the router but not the Internet. For the moment, rebooting the router fixed it but clearly that's not a realistic solution.

I have marked this high severity because: 

  
  - It looks like a regression
  - My kids can't access school via their iPads and are getting marked absent! (like many/most, we're in lockdown)

`/etc/config/network` reads:

config interface 'loopback'
        option ifname 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option ula_prefix 'fddf:17c3:6271::/48'

config interface 'lan'
        option type 'bridge'
        option ifname 'eth0.1'
        option proto 'static'
        option netmask '255.255.255.0'
        option ip6assign '60'
        option broadcast '192.168.7.255'
        option ipaddr '192.168.7.1'
        option gateway '****'  



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