H3C Technologies H3C S7500E Series Switches - Manual (Page 188)

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HoldTime: 150
Uptime: 00:51:45
Expires: 00:02:22
RP: 192.168.9.2
Priority: 0
HoldTime: 150
Uptime: 00:51:45
Expires: 00:02:22
Assume that Host A needs to receive information addressed to the multicast group G
(225.1.1.0). 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 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
(*, 225.1.1.0)
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, 225.1.1.0)
RP: 192.168.9.2
Protocol: pim-sm, Flag: SPT ACT
UpTime: 00:00:42
Upstream interface: Vlan-interface101
Upstream neighbor: 192.168.1.2
RPF prime neighbor: 192.168.1.2
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