3Com Switch 8800 Advanced Software V5 Configuration Guide

350 CHAPTER 30: OSPF CONFIGURATION
# Configure SwitchA
[SwitchA] ospf
[SwitchA-ospf-1] area 1
[SwitchA-ospf-1-area-0.0.0.1] vlink-peer 2.2.2.2
[SwitchA-ospf-1-area-0.0.0.1] quit
[SwitchA-ospf-1] quit
# Configure SwitchB
[SwitchB] ospf 1
[SwitchB-ospf-1] area 1
[SwitchB-ospf-1-area-0.0.0.1] vlink-peer 1.1.1.1
[SwitchB-ospf-1-area-0.0.0.1] quit
# Display the OSPF routing table on SwitchA.
[SwitchA] display ospf routing
OSPF Process 1 with Router ID 1.1.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
172.16.1.1/16 1563 Inter 192.168.1.2 2.2.2.2 0.0.0.0
10.0.0.0/8 1 Stub 10.1.1.1 1.1.1.1 0.0.0.0
192.168.1.0/24 1562 Stub 192.168.1.1 1.1.1.1 0.0.0.1
Total Nets: 3
Intra Area: 2 Inter Area: 1 ASE: 0 NSSA: 0
Switch A has learned the route 172.16.1.1/16 to Area2.
Troubleshooting OSPF
Configuration
No OSPF Neighbor
Relationship Established
Symptom
No OSPF neighbor relationship can be established.
Analysis
If the physical link and lower protocols work well, check OSPF parameters
configured on interfaces. Two neighbors must have the same parameters, such as
the area ID, network segment and mask (a P2P or virtual link may have different
network segments and masks), network type. If the network type is broadcast or
NBMA, at least one interface must have a DR priority higher than 0.
Processing steps
1 Display OSPF neighbor information using the display ospf peer command.
2 Display OSPF interface information using the display ospf interface command.
3 Ping the neighbor router’s IP address to check connectivity.
4 Check OSPF timers. The dead interval on an interface must be at least four times
the hello interval.