Configuring 802.1P Precedence For Igmp Messages - 3Com S7906E Configuration Manual

If the multicast group replacement feature is enabled, the newly joined multicast group
automatically replaces an existing multicast group with the lowest address.
If the multicast group replacement feature is not enabled, new IGMP reports will be automatically
discarded.
Configuring multicast group replacement globally
Follow these steps to configure multicast group replacement globally:
To do...
Enter system view
Enter IGMP snooping view
Enable multicast group
replacement
Configuring multicast group replacement on a port or a group of ports
Follow these steps to configure multicast group replacement on a port or a group of ports:
To do...
Enter system view
Enter Ethernet port/ONU
port/Layer 2 aggregate
interface view or port group
view
Enable multicast group
replacement
Be sure to configure the maximum number of multicast groups allowed on a port (refer to
Maximum Multicast Groups that Can Be Joined on a
Otherwise, the multicast group replacement functionality will not take effect.

Configuring 802.1p Precedence for IGMP Messages

You can change 802.1p precedence of IGMP messages so that they can be assigned higher forwarding
priority when congestion occurs on their outgoing ports.
Configuring 802.1p precedence for IGMP messages globally
Follow these steps to configure 802.1p precedence for IGMP messages globally:
To do...
Enter system view
Use the command...
system-view
igmp-snooping
overflow-replace [ vlan
vlan-list ]
Use the command...
system-view
interface interface-type
interface-number
port-group manual
port-group-name
igmp-snooping
overflow-replace [ vlan
vlan-list ]
Port) before enabling multicast group replacement.
Use the command...
system-view
1-23
Remarks
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Required
Disabled by default
Remarks
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Required
Use either approach
Required
Disabled by default
Configuring
Remarks
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