H3C S5500-EI - Configuring Ipv6 PIM Snooping

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• When running MLD snooping without IPv6 PIM snooping, the Layer 2 switch maintains the router
ports according to IPv6 PIM hello messages received from IPv6 PIM-capable routers, broadcasts all
other types of received IPv6 PIM messages in the VLAN, and forwards all multicast data to all router
ports in the VLAN. Each IPv6 PIM-capable router in the VLAN, whether interested in the multicast
data or not, will receive all multicast data and all IPv6 PIM messages except for IPv6 PIM hello
messages.
• If the Layer 2 switch runs both MLD snooping and IPv6 PIM snooping, it determines whether an IPv6
PIM-capable router is interested in the multicast data destined for a multicast group according to the
received IPv6 PIM messages that the router sends, and adds the port that connects to the router to
a multicast forwarding entry. Then, the Layer 2 switch can correctly forward IPv6 PIM messages and
the multicast data only to the router according to the multicast forwarding entry, saving network
bandwidth.
For more information about MLD snooping and the router port, see "Configuring MLD snooping."
Fo
r more information about IPv6 PIM, see "Configuring IPv6 PIM (available only on the S5500-EI)."
Configuring IPv6 PIM snooping
When you configure IPv6 PIM snooping, follow these guidelines:
• Before you configure IPv6 PIM snooping for a VLAN, you must enable IPv6 forwarding and MLD
snooping globally and enable MLD snooping in the VLAN.
• IPv6 PIM snooping does not work in the sub-VLANs of a multicast VLAN. For more information
about IPv6 multicast VLAN, see "Configuring IPv6 multicast VLANs."
• In a ne
twork with IPv6 PIM snooping enabled switches, configure the size of each join/prune
message no more than the path maximum transmission unit (MTU) on the IPv6 PIM-enabled edge
router on the receiver side. For more information about the join/prune messages, see "Configuring
I
Pv6 PIM (available only on the S5500-EI)."
• After you enable IPv6 PIM snooping in a VLAN, IPv6 PIM snooping works only on the member
interfaces of the VLAN.
To configure IPv6 PIM snooping:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable IPv6 forwarding
globally.
ipv6 Disabled by default
3. Enable MLD snooping
globally and enter
MLD-snooping view.
mld-snooping Disabled by default
4. Return to system view.
quit N/A
5. Enter VLAN view.
vlan vlan-id N/A
6. Enable MLD snooping in the
VLAN.
mld-snooping enable Disabled by default