5-17You can use the display msdp brief command to view the brief information of MSDP peeringrelationships between the switches.# View the brief MSDP peer information on Switch B.[SwitchB] display msdp briefMSDP Peer Brief InformationPeer's Address State Up/Down time AS SA Count Reset Count2.2.2.2 Up 00:48:21 ? 2 0# View the brief MSDP peer information on Switch D.[SwitchD] display msdp briefMSDP Peer Brief InformationPeer's Address State Up/Down time AS SA Count Reset Count1.1.1.1 Up 00:50:22 ? 2 0When Source 1 (10.110.5.100/24) sends multicast data to multicast group G (225.1.1.1), Receiver 1joins multicast group G. By comparing the PIM routing information displayed on Switch B with thatdisplayed on Switch D, you can see that Switch B now acts as the RP for Source 1 and Receiver 1.Source 1 registers with Switch B and Receiver 1 sends a join message to Switch B.# View the PIM routing information on Switch B.[Switch B] display pim routing-tablePIM-SM Routing TableTotal 1 (S,G) entry, 1 (*,G) entry, 0 (*,*,RP) entry(*, 225.1.1.1), RP 10.1.1.1Protocol 0x20: PIMSM, Flag 0x2003: RPT WC NULL_IIFUptime: 00:00:13, never timeoutUpstream interface: Null, RPF neighbor: 0.0.0.0Downstream interface list:Vlan-interface100, Protocol 0x1: IGMP, never timeout(10.110.5.100, 225.1.1.1)Protocol 0x20: PIMSM, Flag 0x4: SPTUptime: 00:03:08, Timeout in 206 secUpstream interface: Vlan-interface103, RPF neighbor: NULLDownstream interface list:Vlan-interface100, Protocol 0x1: IGMP, never timeoutMatched 1 (S,G) entry, 1 (*,G) entry, 0 (*,*,RP) entry# View the PIM routing information on Switch D.[SwitchD] display pim routing-tablePIM-SM Routing TableTotal 0 (S,G) entry, 0 (*,G) entry, 0 (*,*,RP) entryMatched 0 (S,G) entry, 0 (*,G) entry, 0 (*,*,RP) entryTroubleshooting MSDP ConfigurationMSDP Peer Always in the Down StateSymptomAn MSDP peer is configured, but it is always in the down state.
