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Community Member

AP Multicast Mode

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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8 REPLIES
VIP Purple

AP Multicast Mode

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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Community Member

Re: AP Multicast Mode

Hi Rasika,

Thanks for the info, I'll try that out

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Re: AP Multicast Mode

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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"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
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VIP Purple

Re: AP Multicast Mode

Thanks George...

VIP Purple

Re: AP Multicast Mode

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

Community Member

Re: AP Multicast Mode

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

Thanks.


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VIP Purple

Re: AP Multicast Mode

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

**** Pls rate all useful responses ****

Re: AP Multicast Mode

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

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