Multicast in a vlan

[S891]

Hi,

I have to configure multicast on an L2 vlan comprising of multiple switches. These are the requirements:

1. IGMP Snooping must be enabled on all  switches.

2. One switch should be configured as IGMP  querier.

3. All switches should have igmp fast/immediate leave enabled.

I am a bit confused as there are few questions:

A. Should I just enable igmp snooping under layer 2 vlan config or I also need to create layer 3 svi for this vlan on each switch , enable igmp snooping and assign ip on each switch in the SVI. 

3. It looks like a number of igmp configuration requires SVI interface. How do I do it if svi is not required. Also for the IGMP queries it seems like IP is required. 

4. Is there any IGMP snooping required on trunk port of uplinks?

5. Where is the immediate/fast leave configuration done?

Please answer if you only can guide on a few of the above questions. 

4. 

[mlund]

Hi

"1. IGMP Snooping must be enabled on all  switches."  this is the default on cisco switches. Verify with "sh ip igmp snooping"

"2. One switch should be configured as IGMP  querier."  this you have to configure on one switch. this one switch is the only one that needs an L3 vlan with an ip address assigned

"3. All switches should have igmp fast/immediate leave enabled."  this you have to configure in each switch

"4. Is there any IGMP snooping required on trunk port of uplinks?"  no, there is no special config for trunk ports.

 "5. Where is the immediate/fast leave configuration done?"  in the global config mode

/Mikael