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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.
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2.
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4 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.
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2.
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4, 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.