H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches Chapter 5 PIM Configuration
5-47
Assume that Host A needs to receive information addressed to the multicast group G
(225.1.1.1/24). An RPT will be built between Switch A and Switch E. When the multicast
source S (10.110.5.100/24) registers with the RP, an SPT will be built between Switch D
and Switch E. Upon receiving 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 routing-table command to view the PIM routing table information
on the switches. For example:
# View the PIM routing table information on Switch A.
[SwitchA] display pim routing-table
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
RP: 192.168.9.2
Protocol: pim-sm, Flag: WC
UpTime: 00:13:46
Upstream interface: Vlan-interface102,
Upstream neighbor: 192.168.9.2
RPF prime neighbor: 192.168.9.2
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: igmp, UpTime: 00:13:46, Expires: 00:03:06
(10.110.5.100, 225.1.1.1)
RP: 192.168.9.2
Protocol: pim-sm, Flag: SPT ACT
UpTime: 00:00:42
Upstream interface: Vlan-interface101,
Upstream neighbor: 192.168.9.2
RPF prime neighbor: 192.168.9.2
Downstream interface(s) information:
Total number of downstreams: 1
1:: Vlan-interface100
Protocol: pim-sm, UpTime: 00:00:42, Expires: 00:03:06
The information on Switch B and Switch C is similar to that on Switch A.
# View the PIM routing table information on Switch D.
[SwitchD] display pim routing-table
Total 0 (*, G) entry; 1 (S, G) entry
(10.110.5.100, 225.1.1.1)