Lenovo Flex System Fabric CN4093 Application Manual page 440

6. Attach the network interface to the backbone.
7. Attach the network interface to the transit area.
8. Configure the virtual link.
Configuring OSPF for a Virtual Link on Switch #2
1. Configure IP interfaces on each network that will be attached to OSPF areas.
2. Configure the router ID.
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CN4093 Application Guide for N/OS 8.2
The area that contains the virtual link must be configured as a transit area.
CN4093(config­router­ospf)# area 1 area­id 0.0.0.1
CN4093(config­router­ospf)# area 1 type transit
CN4093(config­router­ospf)# area 1 enable
CN4093(config­router­ospf)# exit
CN4093(config)# interface ip 1
CN4093(config­ip­if)# ip ospf area 0
CN4093(config­ip­if)# ip ospf enable
CN4093(config­ip­if)# exit
CN4093(config)# interface ip 2
CN4093(config­ip­if)# ip ospf area 1
CN4093(config­ip­if)# ip ospf enable
CN4093(config­ip­if)# exit
The nbr router ID configured in this step must be the same as the router ID that
will be configured for Switch #2 in Step 2 on page
CN4093(config)# router ospf
CN4093(config­router­ospf)# area­virtual­link 1 area 1
CN4093(config­router­ospf)# area­virtual­link 1 neighbor­router
10.10.14.1
CN4093(config­router­ospf)# area­virtual­link 1 enable
In this example, two IP interfaces are needed:
 Interface 1 for the transit area network on 10.10.12.0/24
 Interface 2 for the stub area network on 10.10.24.0/24
CN4093(config)# interface ip 1
CN4093(config­ip­if)# ip address 10.10.12.2 255.255.255.0 enable
CN4093(config­ip­if)# exit
CN4093(config)# interface ip 2
CN4093(config­ip­if)# ip address 10.10.24.1 255.255.255.0 enable
CN4093(config­ip­if)# exit
A router ID is required when configuring virtual links. This router ID should be
the same one specified as the target virtual neighbor (nbr) on switch 1 in Step 8 on
page 440.
CN4093(config)# ip router­id 10.10.14.1
440.