R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

22
Ste
p
Command Remarks
3. Configure the port as a static
member port.
igmp-snooping static-group
group-address [ source-ip
source-address ] vlan vlan-id
No static member ports exist by
default.
4. Configure the port as a static
router port.
igmp-snooping static-router-port
vlan vlan-id
No static router ports exist by
default.
Configuring a port as a simulated member host
Generally, a host that runs IGMP can respond to IGMP queries. If a host fails to respond, the multicast
router might deem that no member of this multicast group exists on the subnet, and removes the
corresponding forwarding path.
To avoid this situation, you can configure the port as a simulated member host for a multicast group.
When the simulated member host receives an IGMP query, it gives a response. Therefore, the router can
continue receiving multicast data.
A simulated host is equivalent to an independent host in the following ways:
• When a port is configured as a simulated member host, the router sends an unsolicited IGMP report
through the port, and can respond to IGMP general queries with IGMP reports through the port.
• When you disable the simulated joining function on the port, the router sends an IGMP leave
message through the port.
To configure a port as a simulated member host:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view, or
enter 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 the port as a
simulated member host.
igmp-snooping host-join group-address
[ source-ip source-address ] vlan vlan-id
Not configured by default.
NOTE:
Unlike a static member port, a port configured as a simulated member host ages out like a dynamic
member port.
Enabling IGMP snooping fast-leave processing
The fast-leave processing feature enables the router to process IGMP leave messages quickly. With this
feature enabled, when the router 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 router
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 fast-leave processing to save bandwidth and
resources. However, on a port that has multiple hosts attached, you should not enable fast-leave