IGMP - ip igmp snooping querier command


[IGMP snooping](/igmp-snooping) is a Layer 2 feature used for [Multicast](/multicast) traffic, and has a scope of operation that is confined within a specific broadcast domain/[VLAN](/vlan).  One of the prerequisites for IGMP snooping to operate in a specific VLAN is that the VLAN interface is assigned an IP address.  It is this IP address that is used as the source of all [IGMP](/igmp) messages.

This address is used as the query source address for the specific VLAN.  The query source address for each VLAN on a switch can be  determined using the following command:

```
SW1#show ip igmp snooping querier 
Vlan      IP Address               IGMP Version   Port             
-------------------------------------------------------------
1         192.168.1.254            v2            Gi0/1
```

The result will show you the source IP address for IGMP snooping messages for each individual VLAN.

## Links

https://networklessons.com/multicast/igmp-snooping/#IGMP_Group_Leave

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/37e/multicast/configuration_guide/b_mc_37e_3850_cg/b_mc_3e_3850_cg_chapter_0100.pdf

https://forum.networklessons.com/t/igmp-snooping/1321/71?u=lagapides

IGMP snooping source IP address for messages

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IGMP snooping source IP address for messages

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