AP Multicast Mode

[shawntls82]

Hi,

In an environment with two active WLC, if the AP multicast mode need to be enabled, the multicast address for both WLC need to be same address or both should use different address?

Thanks

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[Rasika Nayanajith]

You should never use the same multicast group address in two differnet controller. Always use unique group address in each controller

HTH

Rasika

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[shawntls82]

Hi Rasika,

Thanks for the info, I'll try that out

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[George Stefanick]

Plus 5 Ras !

When you share multicast ips with controllers you increase the size of that multicast ip domain .. Not good ... Let them be different .. It's ok .. Lol

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[Rasika Nayanajith]

Thanks George...

[Sandeep Choudhary]

HI Schwan,

Yes, Rasika is right

it is recommended that each controller in the network is configured  with a different multicast group IP. The reason is because we want to  avoid the multicast traffic on one controller flooding to all other  controllers and APs in the network. The multicast group IP configured  should be local only to one WLC and the APs registered to it.

Regards

[shawntls82]

Thanks all for the info, by the way do I need to enable multicast at switches as well?

Thanks.


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[Rasika Nayanajith]

Yes, if you are using multicast mode for WLC to AP communication then you have to enable multicast in your switch network where WLC & AP connected to.

HTH

Rasika

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[Abhishek Abhishek]

Yes, it is right. You must use two multicast address group for 2 WLC's.