OSPF configuration example on Nexus switches

Below is the OSPF configuration example on Nexus switches. Here OSPF is enable on the directly connected interface between 7K switches.

N7K-1:-

Step 1:- Enable OSPF feature

N7K-1(config)# feature ospf

Step 2:- Enable OSPF Process

N7K-1(config)# router ospf 10  --<<<< OSPF process ID N7K-1(config-router)# router-id 10.1.1.1

Step 3:- Enable ospf on particular interface

N7K-12-1(config-router)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.1 255.255.255.252 N7K-12-1(config-if)# ip router ospf 100 area 0

N7K-2:-

Step 4 :- Enable OSPF feature

N7K-2(config)# feature ospf

Step 5:- Enable OSPF Process

N7K-2(config)# router ospf 100  --<<<< OSPF process ID N7K-2(config-router)# router-id 10.1.1.2

Step 6:- Enable ospf on particular interface.

N7K-2(config)# int Eth1/1 N7K-2(config-if)#ip address 10.1.1.2 255.255.255.252 N7K-2(config-if)# ip router ospf 100 area 0

Step 7 :-  Optional- Below command can be used if we want to disable the neighborship on particular interface.

N7K-1(config)# int Eth1/1 N7K-1(config-if)# ip ospf 100 passive-interface ---< To disable neighborship but still advertise the network N7K-1(config-if)# ip ospf network point-to-point --<< To change the network type

Verification :-

A. Show ip ospf neighbor

N7K-1# sh ip ospf neighbors  OSPF Process ID 100 VRF default  Total number of neighbors: 1  Neighbor ID     Pri State       Up Time  Address      Interface  100.1.1.2         1 FULL/ -     00:00:08 100.1.1.2       Eth1/1