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| Sun Ethernet Fabric Operating System ### OSPF Administration Guide

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## Configure the Null Authentication

1. Configure the OSPF authentication type as null authentication in SEFOS2.
   1. Type.

          SEFOS# configure terminal
          SEFOS(config)# interface vlan 1

   2. Delete the authentication key for message-digest authentication.

          SEFOS(config-if)# no ip ospf message-digest-key 0

   3. Enable null-digest authentication.

          SEFOS(config-if)# ip ospf authentication null

   4. Exit Interface Configuration mode.

          SEFOS(config-if)# exit

   5. Exit Configuration mode.

          SEFOS(config)# exit

2. Configure the OSPF authentication type as null authentication in SEFOS4.
   1. Type.

          SEFOS# configure terminal
          SEFOS(config)# interface vlan 1

   2. Delete the authentication key for message-digest authentication.

          SEFOS(config-if)# no ip ospf message-digest-key 0

   3. Enable null-digest authentication.

          SEFOS(config-if)# ip ospf authentication null

   4. Exit Interface Configuration mode.

          SEFOS(config-if)# exit

   5. Exit Configuration mode.

          SEFOS(config)# exit

3. Examine the adjacency formation between the neighbors.

       SEFOS# show ip ospf neighbor detail
       Neighbor 10.4.0.4, interface address 10.4.0.4
       In the area 0.0.0.0 via interface vlan1
       Neighbor priority is 1,  State is FULL/BACKUP, 5 state changes
       DR is 10.4.0.4 BDR is 10.4.0.2
       Options is 0x2

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