Multicast for cluster heartbeat messages [RED HAT LINUX]
We are setting up a server using two RED HAT LINUX nodes (Redhat-A and Redhat-B). Redundancy and cluster has been configured on these nodes. Both the nodes are connected to a redundant pair of 7606 routers (R-A and R-B). both R-A and R-B are connected through a dot1q trunk. ( Please see attachment )
Redhat requirement for cluster needs IGMP snooping to be disabled for cluster messages to get exchanged.
I understand that disabling IGMP snooping will flood multicast packets on all ports in the VLAN. My question is, what about trunk? when this multicast packet is sent over trunk, will the other router just flood it within VLAN or will it flood it on all the vlans that are allowed over trunk?
Okay, i think we may be talking about slightly different things.
You can disable it on a L3 vlan interface but within a vlan i'm not aware of being able to disable it on physical ports.
So as the multicast will be limited to the vlan anyway (as long as you don't route it) i don't think you can then specify which ports within that vlan run IGMP snooping and which don't ie. IGMP snooping is global per vlan.
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