165
# Configure an SA message rule on Switch D so that Switch D will not create SA messages for
Source 2.
[SwitchD] acl number 2001
[SwitchD-acl-basic-2001] rule deny source 10.110.6.100 0
[SwitchD-acl-basic-2001] quit
[SwitchD] msdp
[SwitchD-msdp] import-source acl 2001
[SwitchD-msdp] quit
Verifying the configuration
# Display the (S, G) entries in the SA message cache on Switch C.
[SwitchC] display msdp sa-cache
MSDP Total Source-Active Cache - 8 entries
Matched 8 entries
Source Group Origin RP Pro AS Uptime Expires
10.110.3.100 225.1.1.0 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 225.1.1.1 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 225.1.1.2 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 225.1.1.3 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 226.1.1.0 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 226.1.1.1 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 226.1.1.2 1.1.1.1 ? ? 02:03:30 00:05:31
10.110.3.100 226.1.1.3 1.1.1.1 ? ? 02:03:30 00:05:31
# Display the (S, G) entries in the SA message cache on Switch D.
[SwitchD] display msdp sa-cache
MSDP Total Source-Active Cache - 4 entries
Matched 4 entries
Source Group Origin RP Pro AS Uptime Expires
10.110.3.100 226.1.1.0 1.1.1.1 ? ? 00:32:53 00:05:07
10.110.3.100 226.1.1.1 1.1.1.1 ? ? 00:32:53 00:05:07
10.110.3.100 226.1.1.2 1.1.1.1 ? ? 00:32:53 00:05:07
10.110.3.100 226.1.1.3 1.1.1.1 ? ? 00:32:53 00:05:07
Troubleshooting MSDP
This section describes common MSDP problems and how to troubleshoot them.
MSDP peers stay in disabled state
Symptom
The configured MSDP peers stay in disabled state.
Analysis
• A TCP connection-based MSDP peering relationship is established between the local interface
address and the MSDP peer.