Troubleshooting Msdp; Msdp Peers Stay In Down State; No Sa Entries In The Router's Sa Cache - 3Com MSR 50 Series Configuration Manual

1158 C 70: MSDP C
HAPTER
Troubleshooting
MSDP
MSDP Peers Stay in
Down State
No SA Entries in the
Router's SA Cache
ONFIGURATION
Peer's Address
192.168.1.1
# View the brief MSDP peer information on Router F.
[RouterF] display msdp brief
MSDP Peer Brief Information of VPN-Instance: public net
Configured Up
1 1
Peer's Address
192.168.3.1
Symptom
The configured MSDP peers stay in the down state.
Analysis
A TCP connection-based MSDP peering relationship is established between the
■
local interface address and the MSDP peer after the configuration.
The TCP connection setup will fail if there is an inconsistency between the local
■
interface address and the MSDP peer address configured on the router.
If no route is available between the MSDP peers, the TCP connection setup will
■
also fail.
Solution
1 Check that a route is available between the routers. Carry out the display ip
routing-table command to check whether the unicast route between the routers
is correct.
2 Check that a unicast route is available between the two routers that will become
MSDP peers to each other.
3 Verify the interface address consistency between the MSDP peers. Use the display
current-configuration command to verify that the local interface address and
the MSDP peer address of the remote router are the same.
Symptom
MSDP fails to send (S, G) entries through SA messages.
Analysis
The import-source command is used to control sending (S, G) entries through
■
SA messages to MSDP peers. If this command is executed without the
acl-number argument, all the (S, G) entries will be filtered off, namely no (S, G)
entries of the local domain will be advertised.
If the import-source command is not executed, the system will advertise all
■
the (S, G) entries of the local domain. If MSDP fails to send (S, G) entries
through SA messages, check whether the import-source command has been
correctly configured.
State Up/Down time
Up 01:07:09
Listen Connect
0 0
State Up/Down time
Up 00:16:40
AS SA Count Reset Count
? 8 0
Shutdown
0
AS SA Count Reset Count
? 13 0
Down
0