H3C Technologies H3C S7500E Series Switches - Manual (Page 57)

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To do... Use the command... Remarks
Enter system view system-view —
interface interface-type
interface-number
Enter Ethernet port/ONU
port/Layer 2 aggregate interface
view or port group view
port-group manual
port-group-name
Required
Use either approach
Enable multicast group
replacement
igmp-snooping
overflow-replace [ vlan
vlan-list ]
Required
Disabled by default
Be sure to configure the maximum number of multicast groups allowed on a port (refer to
Configuring Maximum Multicast Groups that Can Be Joined on a Port ) before enabling
multicast group replacement. 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... Use the command... Remarks
Enter system view system-view —
Enter IGMP-Snooping view igmp-snooping —
Configure 802.1p precedence
for IGMP messages
dot1p-priority priority-number
Required
The default 802.1p precedence
for IGMP messages is 0.
Configuring 802.1p precedence for IGMP messages in a VLAN
Follow these steps to configure 802.1p precedence for IGMP messages in a VLAN:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —