HP 6125XLG R2306-HP 6125XLG Blade Switch IP Multicast Configuration Guide - Page 54
Troubleshooting multicast routing and forwarding, Static multicast route failure, Symptom, Analysis
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[SwitchC] 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-interface200 Protocol: igmp, UpTime: 00:04:25, Expires: - (10.1.1.100, 225.1.1.1) Protocol: pim-dm, Flag: ACT UpTime: 00:06:14 Upstream interface: Tunnel0 Upstream neighbor: 50.1.1.1 RPF prime neighbor: 50.1.1.1 Downstream interface(s) information: Total number of downstreams: 1 1: Vlan-interface200 Protocol: pim-dm, UpTime: 00:04:25, Expires: - The output shows that Switch A is the RPF neighbor of Switch C and the multicast data from Switch A is delivered over a GRE tunnel to Switch C. Troubleshooting multicast routing and forwarding Static multicast route failure Symptom No dynamic routing protocol is enabled on the routers, and the physical status and link layer status of interfaces are both up, but the static multicast route fails. Analysis • If a static multicast route is not correctly configured or updated to match the current network conditions, it does not exist in the static multicast routing table. • If a better route is found, the static multicast route might also fail. Solution 1. Use the display multicast routing-table static command to display information about static multicast routes to verify that the static multicast route has been correctly configured and the route entry exists in the static multicast routing table. 2. Check the type of the interface that connects the static multicast route to the RPF neighbor. If the interface is not a point-to-point interface, be sure to specify the address for the RPF neighbor. 47
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