Handbook

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When you configure a static Mrouter on a VLAN, it replaces any dynamic Mrouters learned through IGMP
Snooping.
IGMP Snooping configuration example
This section provides steps to configure IGMP Snooping on the switch, using the Command Line Interface
(CLI) or the Browser-based Interface (BBI).
Configuring IGMP Snooping (AOS CLI example)
1. Configure port and VLAN membership on the switch, as described in the ―Configuring ports and
VLANs (CLI example)‖ section in the ―VLANs‖ chapter.
2. Add VLANs to IGMP Snooping and enable the feature.
>> /cfg/l3/igmp/on (Globally turn IGMP on)
>> /cfg/l3/igmp/snoop (Select IGMP Snooping menu)
>> IGMP Snoop# ena (Enable IGMP Snooping)
>> IGMP Snoop# apply (Make your changes active)
3. Enable IGMPv3 Snooping (optional).
>> IGMP Snoop# igmpv3 (Select IGMPv3 menu)
>> IGMP V3 Snoop# ena (Enable IGMPv3 Snooping)
>> IGMP V3 Snoop# apply (Apply the configuration)
>> IGMP V3 Snoop# save (Save your changes)
4. View dynamic IGMP information.
>> /info/l3/igmp (Select IGMP Information menu)
>> IGMP Multicast# dump (Show IGMP Group information)
Note: Local groups (224.0.0.x) are not snooped and will not appear.
Source Group VLAN Port Version Mode Expires Fwd
------------ ------------- ------ ------ -------- ---- ---------- ---
224.10.2.0 232.1.0.0 2 18 V3 INC 4:17 Yes
>> /info/l3/igmp/mrouter (Select Mrouter Information menu)
>> IGMP Multicast Router# dump (Show IGMP Group information)
VLAN Port Version Expires Max Query Resp. Time QRV QQIC
----- ----- --------- -------- ----------------------- ---- ----
1 21 V2 atatic unknown - -
2 20 V3 4:09 128 2 125
These commands display information about IGMP Groups and Mrouters learned through IGMP Snooping.