R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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# Display routes to 120.1.1.0/24 on Router A, and you can see that Router A communicates with
Router B through Router C.
<RouterA> display ip routing-table 120.1.1.0 verbose
Routing Table : Public
Summary Count : 2
Destination: 120.1.1.0/24
Protocol: OSPF Process ID: 1
Preference: 10 Cost: 4
IpPrecedence: QosLcId:
NextHop: 10.1.1.100 Interface: GigabitEthernet2/1/2
BkNextHop: 0.0.0.0 BkInterface:
RelyNextHop: 0.0.0.0 Neighbor : 0.0.0.0
Tunnel ID: 0x0 Label: NULL
BKTunnel ID: 0x0 BKLabel: NULL
State: Active Adv Age: 00h58m10s
Tag: 0
Destination: 120.1.1.0/24
Protocol: OSPF Process ID: 0
Preference: 0 Cost: 2
IpPrecedence: QosLcId:
NextHop: 192.168.0.100 Interface: GigabitEthernet2/1/1
BkNextHop: 0.0.0.0 BkInterface:
RelyNextHop: 0.0.0.0 Neighbor : 0.0.0.0
Tunnel ID: 0x0 Label: NULL
BKTunnel ID: 0x0 BKLabel: NULL
State: Invalid Adv Age: 00h58m05s
Tag: 0
Troubleshooting OSPF configuration
No OSPF neighbor relationship established
Symptom
No OSPF neighbor relationship can be established.
Analysis
If the physical link and lower layer 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 might have different network segments and masks).
Solution
1. Verify OSPF neighbor information with the display ospf peer command.
2. Verify OSPF interface information with the display ospf interface command.
3. Ping the neighbor router's IP address to check connectivity.
4. Examine OSPF timers. The dead interval on an interface must be at least four times the hello
interval.