[c-nsp] IGMP snooping ME6500

[ML]

Adrian Minta wrote:
> 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.
> 

Normally I just enable PIM on the SVI and IGMP snooping for the VLAN.
No traffic gets flooded unnecessarily.