IGMP Snooping, Layer 3 or not.

rakemrakem Member Posts: 800
I have read conflicting things regarding IGMP snooping.

Some books say that only layer 3 switches can use IGMP snooping, others say that it can run on a normal layer 2 switch.....

so whats the correct statement?
CCIE# 38186


  • mikej412mikej412 Member Posts: 10,086 ■■■■■■■■■■
    Works fine on a 2950
    S2950-2#show ip igmp snooping vlan 1
    Global IGMP Snooping configuration:
    IGMP snooping              : Enabled
    IGMPv3 snooping (minimal)  : Enabled
    Report suppression         : Enabled
    TCN solicit query          : Disabled
    TCN flood query count      : 2
    Last member query interval : 1000
    Vlan 1:
    IGMP snooping                       : Enabled
    Immediate leave                     : Disabled
    Multicast router learning mode      : pim-dvmrp
    Source only learning age timer      : 10
    Last member query interval          : 1000
    CGMP interoperability mode          : IGMP_ONLY
    :mike: Cisco Certifications -- Collect the Entire Set!
  • ITdudeITdude Member Posts: 1,181 ■■■□□□□□□□
    I guess that answers that question! :D
    I usually hang out on (FF02::A) and (FF02::5) when I'm in a non-proprietary mood.

    Simplicity is the ultimate sophistication.
    (Leonardo da Vinci)
  • dtlokeedtlokee Member Posts: 2,378 ■■■■□□□□□□
    The answer now is L2 and L3 switches, but a few years back, IGMP snooping was not available on the L2 platforms because the ASICs couldn't deal with anything beyond the L2 header. Depending on how old the resource is, the information may have been accurate when it was written.
    The only easy day was yesterday!
Sign In or Register to comment.