Configuring Fast Convergence for a Multi-Area Adjacency Interface

Configuring fast convergence for a multi-area adjacency interface improves network performance.

Procedure

Configure the interval at which a multi-area adjacency interface sends Hello packets.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf timer hello interval multi-area area-id
  The interval at which Hello packets are sent is configured on the multi-area adjacency interface.
6. Run commit
  The configuration is committed.
Configure the dead interval of OSPF neighbor relationships for a multi-area adjacency interface.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf timer dead interval multi-area area-id
  The dead interval of OSPF neighbor relationships is configured for the multi-area adjacency interface.
6. Run commit
  The configuration is committed.
Configure an LSA retransmission interval on a multi-area adjacency interface.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf timer retransmit interval multi-area area-id
  An LSA retransmission interval is configured on the multi-area adjacency interface.
6. Run commit
  The configuration is committed.
Configure an LSA transmission delay on a multi-area adjacency interface.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf trans-delay interval multi-area area-id
  An LSA transmission delay is configured on the multi-area adjacency interface.
6. Run commit
  The configuration is committed.
Configure smart-discover on a multi-area adjacency interface.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf smart-discover multi-area area-id
  Smart-discover is enabled on the multi-area adjacency interface.
  
  Without smart-discover, if the neighbor status of a device on a P2P network changes or the DR or BDR on a multi-access network (broadcast or NBMA network) changes, Hello packets are not sent to neighbors until the Hello timer expires. This slows down the establishment of neighbor relationships. With smart-discover, Hello packets are sent to neighbors immediately in this case, regardless of the Hello timer. This speeds up neighbor relationship establishment and network convergence.
6. Run commit
  The configuration is committed.
Configure an OSPF multi-area adjacency interface to filter the LSAs to be sent.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The OSPF interface view is displayed.
3. Run ospf enable [ process-id ] area area-id
  OSPF is enabled on the interface.
4. Run ospf enable multi-area area-id
  OSPF is enabled on the multi-area adjacency interface.
5. Run ospf filter-lsa-out { all | { summary [ acl { acl-number | acl-name } ] | ase [ acl { acl-number | acl-name } ] | nssa [ acl { acl-number | acl-name } ] } ^* } multi-area area-id
  The multi-area adjacency interface is configured to filter the LSAs to be sent.
  
  If multiple links exist between two devices, you can configure the local device to filter the LSAs to be sent. This prevents unnecessary LSA transmission and reserves bandwidth resources.
6. Run commit
  The configuration is committed.