Dell Networking N4000 Series Configuration Manual page 1185

Figure 35-37. OSPF Configuration—Virtual Link
Switch B is an ABR that directly connects Area 0 to Area 1. Note that in the
previous example, Switch B connected to a stub area and an NSSA. Virtual
links cannot be created across stub areas or NSSAs.
The following commands define a virtual link that traverses Area 1 to Switch
C (5.5.5.5).
To configure Switch B:
1 Configure the virtual link to Switch C for IPv4.
console#configure
console(config)#router ospf
console(config-router)#area 0.0.0.1 virtual-link 5.5.5.5
console(config-router)#exit
2 Configure the virtual link to Switch C for IPv6.
console#configure
console(config)#ipv6 router ospf
console(config-rtr)#area 0.0.0.1 virtual-link 5.5.5.5
console(config-rtr)#exit
Configuring OSPF and OSPFv3
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