R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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a. Maintains the router ports according to the received PIM hello messages that PIM routers send.
b. Broadcasts all other types of received PIM messages in the VLAN.
c. Forwards all multicast data to all router ports in the VLAN.
Each PIM router in the VLAN, whether interested in the multicast data or not, can receive all
multicast data and all PIM messages except PIM hello messages.
• When the Layer 2 switch runs both IGMP snooping and PIM snooping, it does the following actions:
a. Examines whether PIM routers are interested in the multicast data addressed to a multicast
group according to the received PIM messages that the routers send.
b. Adds only the ports connecting the routers that are interested in the data to a multicast
forwarding entry.
c. Forwards PIM messages and multicast data to only the routers that are interested in the data,
saving network bandwidth.
For more information about IGMP snooping and the router port, see "Configuring IGMP snooping." For
more information about PIM, see "Configuring PIM."
PIM snooping is available only when the SAP module is operating in bridge mode.
Configuring PIM snooping
Before configuring PIM snooping for a VLAN, be sure to enable IGMP snooping globally and for the
VLAN.
After you enable PIM snooping for a VLAN, PIM snooping works only on the member interfaces of the
VLAN.
PIM snooping does not work in the sub-VLANs of a multicast VLAN. For more information about multicast
VLAN, see "Configuring multicast VLANs."
To configure PIM snooping:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enable IGMP snooping globally and
enter IGMP-snooping view.
igmp-snooping Disabled by default.
3. Return to system view.
quit N/A
4. Enter VLAN view.
vlan vlan-id N/A
5. Enable IGMP snooping in the VLAN.
igmp-snooping enable Disabled by default.
6. Enable PIM snooping in the VLAN.
pim-snooping enable Disabled by default.
Displaying and maintaining PIM snooping
Task Command Remarks
Display PIM snooping neighbor
information (in standalone
mode).
display pim-snooping neighbor [ [ vlan vlan-id ]
[ slot slot-number ] ] [ | { begin | exclude |
include } regular-expression ]
Available in any view.