CANOGA PERKINS 9175 Configuration Guide - Manual (Page 100)

CanogaOS Configuration Guide
17-1
17 Configuring OSPF
17.1 Overview
OSPF is an Interior Gateway Protocol (IGP) designed expressly for IP networks,
supporting IP subnetting and tagging of externally derived routing information. OSPF
also allows packet authentication and uses IP multicast when sending and receiving
packets.
The implementation conforms to the OSPF Version 2 specifications with these key
features:
• Definition of stub areas is supported.
• Routes learned through any IP routing protocol can be redistributed into another
IP routing protocol. At the intradomain level, this means that OSPF can import
routes learned through EIGRP and RIP. OSPF routes can also be exported into
RIP.
• Plain text and MD5 authentication among neighboring routers within an area is
supported.
• Configurable routing interface parameters include interface output cost,
retransmission interval, interface transmit delay, router priority, router dead and
hello intervals, and authentication key.
• Virtual links are supported.
• Not-so-stubby-areas
(NSSAs) per RFC 1587 are not supported now.
OSPF typically requires coordination among many internal routers, area border routers
(ABRs) connected to multiple areas, and autonomous system boundary routers (ASBRs).
The minimum configuration would use all default parameter values, no authentication,
and interfaces assigned to areas. If you customize your environment, you must ensure
coordinated configuration of all routers.
17.2 References
The OSPF module is based on the following RFC:
RFC 2328 – OSPF version 2
17.3 Basic OSPF Parameters Configuration
Enabling OSPF requires that you create an OSPF routing process, specify the range of
IP addresses to be associated with the routing process, and assign area IDs to be
associated with that range. Beginning in privileged EXEC mode, follow these steps to
enable OSPF:
DUT# configure terminal Enter the Configure mode.
DUT(config)# router ospf 100 Configure the Routing process and specify the Process
ID (100). The Process ID should be a unique positive
integer identifying the routing process.
DUT(config-router)# network 10.10.10.0/24 area 0 Define an interface on which OSPF runs and the area ID
for that interface. You can use the wildcard mask as a
single command to define one or more interfaces to be