ABR 1 Configuration
router ospfv3 1
router-id 10.0.0.217
area 0
interface GigabitEthernet 0/2/0/1
area 1
virtual-link 10.0.0.212
interface GigabitEthernet 0/2/0/0
ABR 2 Configuration
router ospfv3 1
router-id 10.0.0.212
area 0
interface GigabitEthernet 0/3/0/1
area 1
virtual-link 10.0.0.217
interface GigabitEthernet 0/2/0/0
Virtual Link Configured with MD5 Authentication for OSPF Version 2: Example
The following examples show how to configure a virtual link to your backbone and apply MD5 authentication.
You must perform the steps described on both ABRs at each end of the virtual link.
After you explicitly configure the ABRs, the configuration is inherited by all interfaces bound to that
area—unless you override the values and configure them explicitly for the interface.
To understand virtual links, see Virtual Link and Transit Area for OSPF, on page 343.
In this example, all interfaces on router ABR1 use MD5 authentication:
router ospf ABR1
router-id 10.10.10.10
authentication message-digest
message-digest-key 100 md5 0 cisco
area 0
interface GigabitEthernet 0/2/0/1
interface GigabitEthernet 0/3/0/0
area 1
interface GigabitEthernet 0/3/0/1
virtual-link 10.10.5.5
!
!
In this example, only area 1 interfaces on router ABR3 use MD5 authentication:
router ospf ABR2
router-id 10.10.5.5
area 0
area 1
authentication message-digest
message-digest-key 100 md5 0 cisco
interface GigabitEthernet 0/9/0/1
virtual-link 10.10.10.10
area 3
interface Loopback 0
interface GigabitEthernet 0/9/0/0
!
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
OL-30423-03 419
Implementing OSPF
Virtual Link Configured with MD5 Authentication for OSPF Version 2: Example
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