[c-nsp] Multicast flooding on vlan in L3 switch

[Wyatt Mattias Ishmael Jovial Gyllenvarg]

Hi all

We have an issue we cant find any reference too.

We have a 3560G that gets a "ip pim spare-mode" mutlicast feed.

There is a Vlan X on the switch with a few access ports.
When a join comes from one of these ports all ports in the vlan are flooded.
We have tried several IGMP SNOOPING configurations but with no reslut.

We have assumed that this is normal as the L3 multicast process sees
this as one interface and does not act like a L2 switch would. ie the
IGMP snooping is ignored.

How do we get around this?

Best regards

Mattias Gyllenvarg
Omnitron