NEC IP8800/S6300 User Manual
3.
Troubleshooting Functional Failures in Operation
61
3.7
IPv4 Unicast Routing Communication Failure
3.7.1
No RIP Routing Information Exists
Isolate the problem according to the failure analysis method listed below if RIP route information does not exist in the
displayed route information acquired by this system.
displayed route information acquired by this system.
Besides, when the upper limit of routing is set by configuration command maximum routes, see "
." [OP-NPAR]
Table 3-18: RIP Failure Analysis Method
3.7.2
No OSPF Routing Information Exists
Isolate the problem according to the failure analysis method listed below if OSPF route information does not exist in
the displayed route information acquired by this system.
the displayed route information acquired by this system.
Besides, when the upper limit of routing is set by configuration command maximum routes, see "
." [OP-NPAR]
Table 3-19: OSPF Failure Analysis Method
No.
Troubleshooting Steps and Command
Action
1
RIP neighboring information is displayed.
show ip rip neighbor
show ip rip neighbor
Go to No. 2 if the interface of a neighboring router is not displayed.
Go to No. 3 if the interface of a neighboring router is displayed.
2
Check to see if the RIP setting is correct in the
configuration.
configuration.
Go to No. 3 if the configuration is correct.
Correct the configuration if it is not correct.
3
Confirm that the routing are not filtered by
referring to the configuration.
referring to the configuration.
Check to see if the neighboring router advertises the RIP route.
Correct the configuration if it is not correct.
No.
Troubleshooting Steps and Command
Action
1
Check the interface status of OSPF.
show ip ospf interface <IP Address>
show ip ospf interface <IP Address>
Go to No. 3 if the interface status is DR.
Go to No. 2 if the interface status is BackupDR or DR Other.
Execute the command again after a certain period if the interface status is
"Waiting." Go to No. 1.
"Waiting." Go to No. 1.
2
Check the status of a neighboring router of DR
from Neighbor List.
from Neighbor List.
Go to No. 4 if the status of the neighboring router of DR is other than Full.
Go to No. 5 if the status of the neighboring router of DR is Full.
3
Check the status of all neighboring routers from
Neighbor List.
Neighbor List.
Go to No. 4 if the status of some neighboring routers is other than Full.
Go to No. 5 if the status of all neighboring routers is Full.
4
Check to see if the OSPF setting is correct in
configuration.
configuration.
Go to No. 5 if the configuration is correct.
Correct the configuration if it is not correct.
5
Check the OSPF routes that have been learned.
show ip route all-routes
show ip route all-routes
Go to No. 6 if the route is set to "InActive."
If no route exists, check to see if the neighboring router advertises the OSPF
route.
route.
6
Confirm that the routing are not filtered by
referring to the configuration.
referring to the configuration.
Check to see if the neighboring router advertises the OSPF route.
Correct the configuration if it is not correct.