H3C Technologies H3C S7500E Series Switches - Manual (Page 396)

13-45
HoldTime: 130
Uptime: 00:05:19
Expires: 00:02:11
Assume that Host A needs to receive information addressed to the IPv6 multicast group G
(FF0E::100). The RP corresponding to the multicast group G is Switch E as a result of hash
calculation, so an RPT will be built between Switch A and Switch E. When the IPv6 multicast
source S (4001::100/64) registers with the RP, an SPT will be built between Switch D and
Switch E. Upon receiving IPv6 multicast data, Switch A immediately switches from the RPT to
the SPT. Switches on the RPT path (Switch A and Switch E) have a (*, G) entry, while switches
on the SPT path (Switch A and Switch D) have an (S, G) entry. You can use the display pim
ipv6 routing-table command to view the PIM routing table information on the switches. For
example:
# View the IPv6 PIM multicast routing table information on Switch A.
[SwitchA] display pim ipv6 routing-table
Total 1 (*, G) entry; 1 (S, G) entry
(*, FF0E::100)
RP: 1003::2
Protocol: pim-sm, Flag: WC
UpTime: 00:03:45
Upstream interface: Vlan-interface102
Upstream neighbor: 1003::2
RPF prime neighbor: 1003::2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: mld, UpTime: 00:02:15, Expires: 00:03:06
(4001::100, FF0E::100)
RP: 1003::2
Protocol: pim-sm, Flag: SPT ACT
UpTime: 00:02:15
Upstream interface: Vlan-interface101
Upstream neighbor: 1002::2
RPF prime neighbor: 1002::2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: pim-sm, UpTime: 00:02:15, Expires: 00:03:06
The information on Switch B and Switch C is similar to that on Switch A.
# View the IPv6 PIM multicast routing table information on Switch D.
[SwitchD] display pim ipv6 routing-table
Total 0 (*, G) entry; 1 (S, G) entry
(4001::100, FF0E::100)
RP: 1003::2
Protocol: pim-sm, Flag: SPT LOC ACT
UpTime: 00:14:44
Upstream interface: Vlan-interface300