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

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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
Ste
p
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
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. Enable IGMP snooping
fast-leave processing for the
port.
igmp-snooping fast-leave [ vlan vlan-list ] Disabled by default.
Disabling a port from becoming a dynamic router port
The following problems might exist in a multicast access network:
• After receiving an IGMP general query or a PIM hello message from a connected host, a router port
becomes a dynamic router port. Before its timer expires, this dynamic router port receives all
multicast packets within the VLAN where the port belongs, and forwards them to the host, affecting
normal multicast reception of the host.
• In addition, the IGMP general query or PIM hello message that the host sends affects the multicast
routing protocol state on Layer 3 devices, such as the IGMP querier or DR election, and might
further cause network interruption.
To solve these problems, disable that router port from becoming a dynamic router port after the port
receives an IGMP general query or a PIM hello message, so as to improve network security and the
control over multicast users.
To disable a port from becoming a dynamic router port:
Ste
p
Command Remarks
1. Enter system view. system-view N/A