NEC IP8800/S2400 User Manual
3.
Troubleshooting Functional Failures in Operation
62
3.7.3
No BGP4 Routing Information Exists
Isolate the problem according to the failure analysis method listed below if BGP4 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 mazimum routes, see "
." [OP-NPAR]
Table 3-20: BGP4 Failure Analysis Method
3.7.4
No Routing Information Exist [OP-NPAR]
If no routing information for each protocol exist in the information this system acquired, isolate the cause according to
the failure analysis method below.
the failure analysis method below.
Table 3-21: VRF Failure Analysis Method
No.
Troubleshooting Steps and Command
Action
1
Check the BGP4 peer status.
show ip bgp neighbors
show ip bgp neighbors
Go to No. 2 if the peer status is other than Established.
Go to No. 3 if the peer status is Established.
2
Check to see if the BGP4 setting is correct in
configuration.
configuration.
Go to No. 3 if the configuration is correct.
Correct the configuration if it is not correct.
3
Check to see if the BGP4 route is learned.
show ip bgp received-routes
show ip bgp received-routes
Go to No. 4 if the route does not exist.
If the route exists, execute the show ip route command to confirm the
learned route is active.
learned route is active.
4
Check to see if the routing information exists to
solve the next hop address.
show ip route
solve the next hop address.
show ip route
If routing information exists to solve the next hop address, go to No.5.
If no routing information exist to solve the next hop address, perform protocol
fault analysis to learn the routing information.
fault analysis to learn the routing information.
5
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 BGP4 route.
Correct the configuration if it is not correct.
No.
Troubleshooting Steps and Command
Action
1
Check to see if the number of routes in VRF
exceeds the upper limit configured.
show ip vrf
exceeds the upper limit configured.
show ip vrf
If the number of routes exceeds the upper limit, go to No.2.
The number of routes is less than upper limit, perform protocol failure
analysis against protocols that no routing information exists.
RIP: "
analysis against protocols that no routing information exists.
RIP: "
"
"
BGP4: "
2
Check to see the value set in the upper limit for
the number of routes in VRF in the
configuration.
the number of routes in VRF in the
configuration.
Increase the upper limit or aggregate the routing in order to decrease the
routing number.
routing number.