link-local multicast on autonomous APs

Unanswered Question
Nov 7th, 2008
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I have a 877 which I am troubleshooting some mDNS ( issues.

One client sends a mDNS request, the router sees it (packet debug) but the packet is not received by any other client on the wireless LAN.

Given it is link local I don't believe that enabling PIM (which I have done anyway).

I have investigated if there is anything that I would have to do to enable multicast for my wireless clients, on WLCs there is a multicast and broadcast config command which explicitly enables it.

Any directions would be appreciated.



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amritpatek Thu, 11/13/2008 - 12:34
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Make sure that do not use the 239.0.0.X address range or the 239.128.0.X address range. Addresses in these ranges overlap with the link local MAC addresses and will flood out all switch ports even with IGMP snooping turned on.

Use the show network command to verify the multicast mode on the controller and show lwapp mcast to verify the group on the AP. I hope it may help you


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