User's Manual

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Chapter 60 Configuring OSPF
60.1 Overview
The OSPF Configuration will be introduced in this chapter. For more specific detailed information about all the
OSPF commands, please refer to the relevant sections about OSPF Commanders in the Reference for
Network Protocol Configuration.
OSPF is an IGP Route protocol developed by the OSPF Working Group of IETF. The OSPF, which is designed
for the IP Network, supports the IP Sub-network and the External Route Information Label and at the same
time allows the authentication of message and supports the IP Multicast.
The Implementation of OSPF of our company complies with the OSPF V2 specification (Refers to RFC2328).
Some key feathers in the implementation are listed in the following:
 Stub Area--Supporting the Stub Area
 Route redistribution--Any route, formed by and learned a routing protocol, can always be
redistributed to the other route protocol Domain. Within the autonomous System, it means
that OSPF can input the route learned by the RIP. And the routes learned by OSPF can also
be redistributed to the RIP. Between autonomous Systems, OSPF can input the routes
learned by BGP; and OSPF routes can also be injected to BGP.
 Authentication--The Plaintext and MD5 Authentications are supported between the
neighboring routers within a area.
 Router Interface Parameters--The configurable Parameters include: Outgoing Cost,
Retransmission Interval, Interface Transmission Delay, router Priority, Judgement on the
router Switching-off Interval, the Interval of Hello Message and the Authentication Password.
 Virtue Link--Supporting the Virtue Link
 NSSA area--Refer to RFC 1587
 OSPF---RFC 1793 on the virtual circuit.
60.2 OSPF Configuration Tast List
OSPF requires to exchange routing data among all routers, ABR and ASBR in a area. In order to simplify the
configuration, you may let them all work under default parameters without authentication, etc… but if you want
to alter some parameters, you should guarantee the identity of the parameters on all routers.
In order to configure OSPF complete the following tasks. Besides the necessity of activating OSPF, other
configurations are all optional.
 Start OSPF
 Configure the interface parameter of OSPF
 OSPF configuration on different physical networks
 Configure route summary within OSPF domain
 Configure the gathering of a forward router
 Create default route
 Select router ID through LOOPBACK interface
 Configure the management distance of OSPF
 Configure the route calculating timer