OpenWrt "Chaos Calmer" 15.05 released [LWN.net]

OpenWrt "Chaos Calmer" 15.05 released

Posted Sep 16, 2015 23:08 UTC (Wed) by marcH (subscriber, #57642)
In reply to: OpenWrt "Chaos Calmer" 15.05 released by raven667
Parent article: OpenWrt "Chaos Calmer" 15.05 released

> Bridging multicast, which brings with it the need to inspect IGMP, is more complicated than just unicast and broadcast

It's only an issue for expensive, "enterprise" switches trying to be smart and optimize for large networks. Cheaper and simpler switches just broadcast multicast frames.

> it sounds more like the bridge is also running an mDNS daemon, such as Avahi, which may not be configured correctly to work on a bridge instead of an endpoint host.

By essence shouldn't software running on a software bridge not be aware of any bridging going on and see a single (bridge) interface? The real interfaces would normally not even have any IP configuration.

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OpenWrt "Chaos Calmer" 15.05 released

Posted Sep 17, 2015 3:19 UTC (Thu) by raven667 (guest, #5198) [Link] (1 responses)

Linux can do all sorts of things and you can still interact with the bridge member interfaces as well as the bridge virtual interface as far as I can tell, I just tested adding an IP and pinging a bridge member interface and it seemed to work. Linux packet forwarding, even before we get to OpenVSwitch, is complicated.

https://upload.wikimedia.org/wikipedia/commons/3/37/Netfi...

OpenWrt "Chaos Calmer" 15.05 released

Posted Sep 17, 2015 6:09 UTC (Thu) by marcH (subscriber, #57642) [Link]

I have no doubt you can do complicated things. I don't think you have to in such a relatively simple use case.

On the other hand I never found the bridge configuration super intuitive so I guess it's easy enough to make things artificially complicated by mistake.