22
•
When the simulated joining function is disabled on a port, the switch sends an IGMP leave
message through the port.
Unlike a static member port, a port that you configure as a simulated member host ages out like a
dynamic member port.
To configure a port as a simulated member host:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2 Ethernet
interface view, Layer 2
aggregate interface view, or
port group view.
•
Enter Layer 2 Ethernet interface
view or Layer 2 aggregate
interface view:
interface
interface-type
interface-number
•
Enter port group view:
port-group
manual
port-group-name
Use either command.
3.
Configure a port as a
simulated member host.
igmp-snooping host-join
group-address
[
source-ip
source-address
]
vlan
vlan-id
Not configured by default.
Enabling IGMP snooping fast-leave processing
IGMP snooping fast-leave processing enables the switch to process IGMP leave messages quickly. With
IGMP snooping fast-leave processing enabled, when the switch receives an IGMP leave message on a
port, it immediately removes that port from the forwarding entry for the multicast group specified in the
message. Then, when the switch receives IGMP group-specific queries for that multicast group, it does not
forward them to that port.
On a port that has only one host attached, you can enable IGMP snooping fast-leave processing to save
bandwidth and resources. However, on a port that has multiple hosts attached, you should not enable
IGMP snooping fast-leave processing if you have enabled dropping unknown multicast data globally or
for the port. Otherwise, if a host on the port leaves a multicast group, the other hosts attached to the port
in the same multicast group cannot receive the multicast data for the group.
Enabling IGMP snooping fast-leave processing globally
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IGMP-snooping view.
igmp-snooping
N/A
3.
Enable IGMP snooping
fast-leave processing.
fast-leave
[
vlan
vlan-list
]
Disabled by default
Enabling IGMP snooping fast-leave processing on a port
Step Command
Remarks
1.
Enter system view.
system-view
N/A
