There is a VLAN 10 SVI on this switch and the ACL is accounting lots of multicast traffic. The SVI has both primary and secondary range configured.
Vlan 10 has many host in primary and secondary range that is multicast capable. IGMP snooping is enabled by default.
CS2#show ip igmp snooping vlan 10 Global IGMP Snooping configuration: ------------------------------------------- IGMP snooping : Enabled IGMPv3 snooping (minimal) : Enabled Report suppression : Enabled TCN solicit query : Disabled TCN flood query count : 2 Robustness variable : 2 Last member query count : 2 Last member query interval : 1000
Vlan 10: -------- 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
I wanted to make sure multicasting within this vlan 10 works without any problem None of the switchports show a multicast entry. Therefore I am little suspicious that multicast within this vlan is working correctly or not. I have made no special multicast configuration for this.
For multicast in layer 2 only network, you need a router becomes IGMP querier. You can do that by either enable pim under SVI or just enabel IGMP querier. The layer 2 mcast traffic should not hit your interface ACL.
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If multicast sender and receiver are within the same L2 broadcast domain, multicast should work unless you're running across a switch that does IGMP snooping. An IGMP snooper needs an IGMP querier so it will know which ports want to receive the multicast traffic.
Normally multicast router gateway act as an IGMP querier, but some L2 IGMP snooping switches can do this function too.
If I remember correctly, to enable IGMP querier on a L3 interface, just enable PIM in the L3 interface.
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