142
Candidate RP: 192.168.9.2(Vlan-interface102)
Priority: 192
HoldTime: 150
Advertisement Interval: 60
Next advertisement scheduled at: 00:00:48
# Display RP information on Switch A.
[SwitchA] display pim rp-info
PIM-SM BSR RP information:
Group/MaskLen: 225.1.1.0/24
RP: 192.168.4.2
Priority: 192
HoldTime: 150
Uptime: 00:51:45
Expires: 00:02:22
RP: 192.168.9.2
Priority: 192
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. After 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,
and 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:
# Display 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
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