Operation Manual – Routing ProtocolH3C S9500 Series Routing Switches Chapter 4 OSPF Configuration4-6z Authenticator: OSPF provides clear text authenticator and MD5 encryptionauthenticator to authenticate packets transmitted between neighboring routers inthe same area.z Flexible configuration for the router port parameter: On the router port, you canconfigure the following OSPF parameters: output cost, Hello packet interval,retransmission interval, port transmission delay, route precedence, invalid time foradjacent routers, packet authentication mode, packet authenticator, and others.z Virtual connection: Creates and configures virtual connections.z Abundant debugging information: OSPF provides abundant debugginginformation, consequently helping users to diagnose failure.4.2 Configuring OSPFOSPF configuration needs cooperation among routers: intra-area, area boundary, andAS boundary. If none of OSPF parameters is configured, their default settings apply. Inthis case, sent and received packets are not authenticated, and an individual interfacedoes not belong to the area of any AS. When reconfiguring a default parameter on onerouter, make sure that the same change is made on all other involved routers.In various configurations, you must first enable OSPF, specify the interface and area IDbefore configuring other functions. But the configuration of the functions related to theinterface is not restricted by whether the OSPF is enabled or not. It should be noted thatafter OSPF is disabled, the OSPF-related interface parameters also become invalid.OSPF configuration includes:1) OSPF basic configurationz Configuring Router IDz Enabling OSPFz Entering the OSPF area viewz Enabling OSPF on the specified network2) Configuration related to OSPF routez Configuring OSPF to import routes of other protocolsz Configuring OSPF to import default routesz Configuring OSPF route filteringz Configuring OSPF route convergence3) Some OSPF configurationsz Configuring OSPF precedencez Setting the interface priority for DR electionz Configuring OSPF timersz Configuring the time for the interface to send LSU packetsz Configuring the cost for sending packets on an interfacez Configuring the network type on the OSPF interfacez Configuring NBMA neighbors for OSPFz Configuring to fill the MTU field when an interface transmits DD packets