R211x-HP Flexfabric 11900 IP Multicast Configuration Guide

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Assume that Host A needs to receive the information addressed to multicast group 225.1.1.1. After
multicast source 10.110.5.100/24 sends multicast packets to the multicast group, an SPT is established
through traffic flooding. Switches on the SPT path (Switch A and Switch D) have their (S, G) entries. Host
A sends an IGMP report to Switch A to join the multicast group G, and a (*, G) entry is generated on
Switch A. You can use the display pim routing-table command to display the PIM routing table
information on each switch. For example:
# Display 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)
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: -
(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: -
# Display 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)
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: 2
1: Vlan-interface103
Protocol: pim-dm, UpTime: 00:03:27, Expires: -
2: Vlan-interface102
Protocol: pim-dm, UpTime: 00:03:27, Expires: -