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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... Use the command... Remarks
Enter system view
system-view —
Enter Ethernet interface view,
Layer 2 aggregate interface view,
or port group view
interface interface-type interface-
number
Required
Use either approach
port-group manual port-group-
name
Enable multicast group
replacement
igmp-snooping overflow-replace [
vlan vlan-list ]
Required
Disabled by default
CAUTION:
Be sure to configure the maximum number of multicast groups allowed on a port—see “Configuring
static
ports“—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
—
Configure 802.1p precedence for
IGMP messages in the VLAN
igmp-snooping dot1p-priority
priority-number
Required
The default 802.1p precedence
for IGMP messages is 0.
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