[c-nsp] IGMP snooping ME6500

Adrian Minta adrian.minta at gmail.com
Sun Jul 12 14:40:51 EDT 2009


Tim Stevenson wrote:
> That's not really the critical thing, so much as - you need an IGMP 
> querier active in the VLAN in order for snooping to work 
> correctly/reliably. Some applications may behave fine without; others 
> won't. The key is periodic joins from the hosts are required to 
> maintain membership state for snooping. The querier ensures that happens.
>
> So what you really need is an SVI *with* an IP address for that vlan, 
> and then enable igmp snooping querier for that vlan. The configured IP 
> is used to source queries. The SVI in this case can actually be 
> shutdown, it doesn't really matter.
>
> The config is like:
> int vlan 200
>  ip add 10.1.1.1/24
>  ip igmp snooping querier
>  shut
>
> The other option is to just enable PIM on the (admin up) SVI in the 
> vlan, but you may not want to do that, depends on the network design.
>
> int vlan 200
>  ip add 10.1.1.1/24
>  ip pim sparse
>  no shut
>
> HTH,
> Tim
>
Creating an unnumbered interface didn't seems to work. Now I am trying 
your solution, the one with "ip igmp snooping querier". I don't want to 
involve the switches in any multicast routing.

-- 
Best regards,
Adrian Minta





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