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Enabling all groups entry again, Reset port 24’s packet counters – Allied Telesis AR400 User Manual

Page 91

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Page 91 | AlliedWare™ OS How To Note: IGMP

Stopping snoopers from snooping non-IGMP messages > Preventing an All Groups entry for a port

Enabling All Groups entry again

To further explore the system we will next reverse the process and follow switch 2 while
group entries time out and the switch starts transmitting traffic for the group 224.12.13.14 to
the router again. This sequence illustrates the time delay between when you change a port’s
All Groups configuration and when multicast traffic flow changes.

1. Permit port 24 to be an All Groups port again.

2. Check the group entry timeout values.

Port 24 is now an All Groups port. However, this not mean that it immediately starts
receiving multicast packets for the group 224.12.13.14, as the next few steps show.

3. Reset port 24’s packet counters.

Manager Switch 2> enable ip igmp allgroups=24

Info (1005003): Operation successful.

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 216 secs

Ports None

All Groups Entry timeout 254 secs

Ports 24-25

------------------------------------------------------------------------

Manager Switch 2> reset switch port=24 counter

Info (1087003): Operation successful.

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