Enable multicast on a subnet (HP 5900)

[fab2]

Hi,

my customer tells me that some servers will communicate together with multicast, and asks if the network has "multicast enabled".

The think is, the servers are on a same vlan and subnet. I found out that in general, layer-2 switchs forward the multicast frames out of all ports on the VLAN (except the one it was received on).

Does HPE 5900 behaves this way ? There is no configuration to "enable multicast" on this vlan ? Can anyone confirm that ?

I also understood that if I want to avoid flooding I can enable igmp-snooping (to forward packets to the concerned ports port), but this is not required to have multicast passing through. Is that correct ?

It would be something like that:

vlan 11

 igmp-snooping enable

 igmp-snooping drop-unknown

 igmp-snooping version 2

Thanks!

Fabien

[sdide · Accepted solution]

Hi,

yes the switch will broadcast the multicast traffic if IGMP-snooping is not enabled.

You can enable IGMP-snooping:

example:

igmp-snooping
 enable vlan <vlan-list>
 quit

Regards