09-10-2012 11:34 AM - edited 03-07-2019 08:48 AM
I work at a datacenter where we run many applications and many backups. There is no music/video streaming but there are so many applications I'm sure one of them is using multicast. How can I tell if I need to enable IGMP snooping? Would there be any unwanted side effects if I enabled IGMP?
Vlan Id : 110
L2 Unicast Packets : 304283703
L2 Unicast Octets : 135592854659
L3 Input Unicast Packets : 0
L3 Input Unicast Octets : 0
L3 Output Unicast Packets : 0
L3 Output Unicast Octets : 0
L3 Output Multicast Packets : 0
L3 Output Multicast Octets : 0
L3 Input Multicast Packets : 0
L3 Input Multicast Octets : 0
L2 Multicast Packets : 1462071
L2 Multicast Octets : 126453949
Vlan Id : 111
L2 Unicast Packets : 8018368
L2 Unicast Octets : 6383169343
L3 Input Unicast Packets : 0
L3 Input Unicast Octets : 0
L3 Output Unicast Packets : 0
L3 Output Unicast Octets : 0
L3 Output Multicast Packets : 0
L3 Output Multicast Octets : 0
L3 Input Multicast Packets : 0
L3 Input Multicast Octets : 0
L2 Multicast Packets : 229599
L2 Multicast Octets : 19349384
Vlan Id : 112
L2 Unicast Packets : 1214444
L2 Unicast Octets : 1242659763
L3 Input Unicast Packets : 0
L3 Input Unicast Octets : 0
L3 Output Unicast Packets : 0
L3 Output Unicast Octets : 0
L3 Output Multicast Packets : 0
L3 Output Multicast Octets : 0
L3 Input Multicast Packets : 0
L3 Input Multicast Octets : 0
L2 Multicast Packets : 186106
L2 Multicast Octets : 16563384
09-10-2012 11:40 AM
Hi,
as far as I know IGMP snooping is only beneficial when you have got L3 multicast in your network which doesn't seem the case here as we only see L2 multicast packets on the switch. It may be CDP,STP,VTP but L2 multicast only is not using IGMP so no need for IGMP snooping.
Regards.
Alain
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