3Com Switch 8800 Advanced Software V5 Configuration Guide

596 CHAPTER 42: PIM CONFIGURATION
Neighbor Interface Uptime Expires Dr-Priority
192.168.1.1 Vlan103 00:02:22 00:01:27 1
192.168.2.1 Vlan101 00:00:22 00:01:29 3
192.168.3.1 Vlan102 00:00:23 00:01:31 5
Assume that Host A needs to receive the information addressed to a multicast
group G (225.1.1.1/24). After multicast source S (10.110.5.100/24) sends
multicast packets to the multicast group G, an SPT is established through traffic
flooding. Switches on the SPT path (Switch A and Switch D) have their (S, G)
entries. Host A registers with Switch A, and a (*, G) entry is generated on Switch
A. You can use the display pim routing-table command to view the PIM routing
table information on each switch. For example:
# View the PIM routing table information on Switch A.
<SwitchA> display pim routing-table
Vpn-instance: public net
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
Protocol: pim-dm, Flag: WC
UpTime: 00:04:25
Upstream interface: NULL
Upstream neighbor: NULL,
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: Vlan-interface100
Protocol: igmp, UpTime: 00:04:25, Expires: never
(10.110.5.100, 225.1.1.1)
Protocol: pim-dm, Flag: ACT
UpTime: 00:06:14
Upstream interface: Vlan-interface103,
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-dm, UpTime: 00:04:25, Expires: never
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
Vpn-instance: public net
Total 0 (*, G) entry; 1 (S, G) entry
(10.110.5.100, 225.1.1.1)
Protocol: pim-dm, Flag: LOC ACT
UpTime: 00:03:27
Upstream interface: Vlan-interface300
Upstream neighbor: NULL,
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 3
1: Vlan-interface103