Switch User Manual

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188 IP Routing Conﬁguration and Management

Interface Nbr Router ID Nbr IP Address Pri State RetransQLen Perm

--------- --------------- --------------- --- --------- ----------- ----

10.1.1.18 1.1.1.2 10.1.1.17 50 Full 0 Dyn

Total OSPF Neighbors: 1

show ip route

========================================================================

Ip Route

========================================================================

DST MASK NEXT COST VLAN PORT PROT TYPE PRF

------------------------------------------------------------------------

172.3.3.0 255.255.255.252 172.3.3.1 1 1000 ---- C DB 0

172.1.1.0 255.255.255.0 10.1.1.17 40 100 T#5 O IB 25

10.1.1.16 255.255.255.252 10.1.1.18 1 100 ---- C DB 0

10.1.1.24 255.255.255.252 10.1.1.17 30 100 T#5 O IB 25

10.1.1.20 255.255.255.252 10.1.1.17 20 100 T#5 O IB 25

10.1.1.8 255.255.255.252 10.1.1.17 20 100 T#5 O IB 25

10.1.1.0 255.255.255.252 10.1.1.17 40 100 T#5 O IB 25

0.0.0.0 0.0.0.0 10.1.1.17 11 100 T#5 O IB 25

Total Routes: 8

------------------------------------------------------------------------

TYPE Legend: I=Indirect Route, D=Direct Route, A=Alternative Route,

B=Best Route,E=Ecmp Route, U=Unresolved Route, N=Not in HW

Diagnosing neighbor state problems

At initial startup, routers transmit hello packets in an attempt to ﬁnd other

OSPF routers with which form adjacencies. After the hello packets are

received, the routers perform an initialization process, which causes

the routers to transition through various states before the adjacency is

established. The following table lists the states a router can go through

during the process of forming an adjacency.

OSPF neighbor states

Step State

Description

Down Indicates that a neighbor was conﬁgured manually,

but the router did not received any information

from the other router. This state can occur only on

NBMA interfaces.

Attempt On an NBMA interface, this state occurs when

the router attempts to send unicast hellos to any

conﬁgured interfaces. The Nortel Ether net Routing

Switch 5500 Series does not support NBMA type.

Nortel Ethernet Routing Switch 5500 Series

Conﬁguration-IP Routing Protocols

NN47200-503 03.01 Standard

5.1 27 August 2007