[FS#253] Multicast over wireless ceases to work properly after a while on ath9k with many clients connected

[LEDE Bugs]

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FS#253 - Multicast over wireless ceases to work properly after a while on ath9k with many clients connected
User who did this - JurgendW (JurgendW)

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Noticed similar problem in my setup running 17.01.1. I observed that mdns discovery stops working from Wireless clients.

I have done a //tcpdump -i any port 5353// to observe all multicast traffic and you see all the messages being passed around. They just do not reach wireless clients. Doing //service network restart// resolves the problem.

I have now implicitly enabled igmp_snooping as this was turned off (i checked ///sys/class/net/br-lan/bridge_multicast_snooping// and it was set to 0 as default). It appears to be working now. I will keep monitoring to see if it breaks.


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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=253#comment2542