Configuring Ipv6 Pim Snooping; Overview - HP 6125XLG Ip Multicast Configuration Manual

Configuring IPv6 PIM snooping

Overview

IPv6 PIM snooping runs on Layer 2 devices. It works with MLD snooping to analyze received IPv6 PIM
messages, and adds the ports that are interested in specific multicast data to an IPv6 PIM snooping
routing entry. In this way, the multicast data can be forwarded to only the ports that are interested in the
data.
Figure 72 Multicast packet transmission without or with IPv6 PIM snooping
IPv6 multicast packet transmission
when only MLD snooping runs
Source 1
IPv6 PIM
router 1
IPv6 PIM
router 3
Receiver 1
As shown in
multicast data to multicast group G2. Receiver 1 belongs to G1, and Receiver 2 belongs to G2. The Layer
2 switch's interfaces that connect to the IPv6 PIM-capable routers are in the same VLAN.
When the Layer 2 switch only runs MLD snooping, it performs the following actions:
•
Source 2
Layer 2 switch
Receiver 2
IPv6 multicast packets (S1, G1)
IPv6 multicast packets (S2, G2)
Figure 72, Source 1 sends multicast data to multicast group G1, and Source 2 sends
IPv6 PIM IPv6 PIM
router 2 router 1
IPv6 PIM IPv6 PIM
router 4 router 3
234
IPv6 multicast packet transmission when
MLD snooping and IPv6 PIM snooping both run
Source 1
Receiver 1
Join message (S1, G1)
Join message (S2, G2)
Source 2
IPv6 PIM
router 2
Layer 2 switch
IPv6 PIM
router 4
Receiver 2