Multicast on 3750s

Answered Question
Oct 31st, 2008

I see that cgmp is not supported on Cat3750s. In other catalysts I just enabled cgmp to be sure that a multicast stream did not get forwarded to every port on the switch. What do I need to configure on the 3750 to accomplish the same end? I don't play on having any inter-vlan multicast. Just need to know how to control it within a single vlan. Thanks.

Correct Answer by Joseph W. Doherty about 8 years 3 months ago

Enable IGMP snooping (believe the 3750s support it).

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mmedwid Fri, 10/31/2008 - 12:34

(config)#ip igmp snooping

...looks to have done the job. Thank-you.

Vlan 22:

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IGMP snooping : Enabled

IGMPv2 immediate leave : Disabled

Multicast router learning mode : pim-dvmrp

CGMP interoperability mode : IGMP_ONLY

Robustness variable : 2

Last member query count : 2

Last member query interval : 1000

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