Igmp-Snooping Fast-Leave - 3Com 8807 Command Reference Manual

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Example
# Enable IGMP Snooping in system view.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800] igmp-snooping enable
# Enable IGMP Snooping on VLAN 10
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800] vlan 10
[3Com-vlan10] igmp-snooping enable
igmp-snooping Syntax
fast-leave
igmp-snooping fast-leave [ vlan { vlan-id [ to vlan-id ] }&<1-10> ]
undo igmp-snooping fast-leave [ vlan { vlan-id [ to vlan-id ] } &<1-10> ]
View
System view, Ethernet port view
Parameter
vlan { vlan-id [ to vlan-id ] }&<1-10>: Specifies any VLAN or VLAN scope for port
you want to enable/disable the IGMP Snooping fast leave feature on. The vlan-id
argument ranges from 1 to 4094.
Description
Use the igmp-snooping fast-leave command to enable IGMP Snooping fast
leave on ports or VLANs.
Use the undo igmp-snooping fast-leave command to disable IGMP Snooping
fast leave.
You can optionally specify multiple vlan keywords for the igmp-snooping
fast-leave command, through which you can enable IGMP Snooping fast leave in
corresponding VLANs. If you do not specify the vlan keyword, IGMP Snooping
fast leave is enabled in all VLANs. As mentioned earlier, the igmp-snooping
fast-leave command can be executed in both system view and Ethernet port
view. When you execute the command in system view, fast leave is enabled on all
ports of the specified VLANs, otherwise, it is only enabled on the current port in
the specified VLANs.
Isolate-user-VLAN supports the IGMP-Snooping function. After IGMP-Snooping
is enabled under isolate-user-VLAN, all secondary VLANs are IGMP-Snooping
enabled. It makes no sense to enable IGMP-Snooping for a secondary VLAN.
In a secondary VLAN, IGMP packets will be directly converted and processed in
isolate-user-VLAN, namely all the multicast services are implemented within
isolate-user-VLAN.
Ports in secondary VLANs cannot be used as source addresses of multicast.
IGMP Snooping Configuration Commands 573