Allied Telesis AR400 - Manual (Page 93)

Page 93 | AlliedWare™ OS How To Note: IGMP
Stopping snoopers from snooping non-IGMP messages > Preventing an All Groups entry for a port
6. Enable IGMP debugging.
7. Observe the debugging output, which shows that the group 224.12.13.14 was
deleted when its timer expired, then was immediately added in again.
8. Check the group entry timeout values again.
Manager Switch 2> enable ip igmp debug
Info (1005003): Operation successful.
Manager Switch 2> IGMP Snoop Timeout: group=224.12.13.14 (0) is deleted
Deleting all ports for group 224.12.13.14 on vlan100
IGMP Snoop Unregistered Multicast: Source 172.31.0.99, Group 224.12.13.14
-> snd group 224.0.0.2 added
Adding port 24 for group 224.0.0.2 on vlan100
IGMP Snoop: added all router membership
Manager Switch 2> show igmpsnooping
IGMP Snooping
------------------------------------------------------------------------
Status ........................... Enabled
Disabled All-groups ports ........ None
Vlan Name (vlan id) ..... default (1)
Fast Leave .............. Off
Group List ..............
No group memberships.
Vlan Name (vlan id) ..... vlan100 (100)
Fast Leave .............. Off
Group List ..............
Group. 224.12.13.14 Entry timeout 259 secs
Ports None
All Groups Entry timeout 259 secs
Ports 24-25
------------------------------------------------------------------------