Explanation Of Igmp Snooping - Allied Telesis AR400 Series How To Configure

Using Show command output to investigate IGMP state
No group In the first stage of the figure above, the multicast server is turned on and is streaming group
224.12.13.14 to the Querier, switch 1. Switch 1 knows about the group, but has nobody
members
interested in receiving it. You can see this by using the command show igmpsnooping on
switch 1. The output of this command shows that switch 1 has an entry for the group, but no
associated ports.
Manager Switch 1> show igmpsnooping
IGMP Snooping
------------------------------------------------------------------------
Status ........................... Enabled
Disabled All-groups ports ........ None
Vlan Name (vlan id) ..... default (1)
Fast Leave .............. Off
Group List ..............
Vlan Name (vlan id) ..... vlan100 (100)
Fast Leave .............. Off
Group List ..............
------------------------------------------------------------------------
Client joins When a client joins the group, the Group List changes for the Snooper that the client is
the group attached to, and for the Querier. First, look at the output of the command show
igmpsnooping on the Snooper.
Manager Switch 3> show igmpsnooping
IGMP Snooping
------------------------------------------------------------------------
Status ........................... Enabled
Disabled All-groups ports ........ None
Vlan Name (vlan id) ..... default (1)
Fast Leave .............. Off
Group List ..............
Vlan Name (vlan id) ..... vlan100 (100)
Fast Leave .............. Off
Group List ..............
------------------------------------------------------------------------
Page 12 | AlliedWare™ OS How To Note: IGMP
No group memberships.
Group. 224.12.13.14
Ports None
No group memberships.
Group. 224.12.13.14
Ports 3
All Groups
Ports 26
IGMP snooping > Explanation of IGMP snooping
Entry timeout 136 secs
Entry timeout 257 secs
Entry timeout 235 secs