Chapter 5 Ospf Configuration Guide; Ospf Overview; Configure Ospf - Cabletron Systems SmartSwitch 8-slot User's Reference Manual

Chapter 5 OSPF Configuration Guide

OSPF Overview

Open Shortest Path First (OSPF) is a link-state routing protocol that supports IP
subnetting and authentication. The SSR supports OSPF Version 2.0 as defined in RFC
1583. Each link-state message contains all the links connected to the router with a
specified cost associated with the link.
The SSR supports the following OSPF functions:
• Stub Areas: Definition of stub areas is supported
• Authentication: Simple password and MD5 authentication methods are supported
within an area
• Virtual Links: Virtual links are supported
• Route Redistribution: Routes learned via RIP, BGP, or any other sources can be
redistributed into OSPF. OSPF routes can be redistributed into RIP or BGP
• Interface Parameters: Parameters that can be configured include interface output
cost, retransmission interval, interface transmit delay, router priority, router dead
and hello intervals, and authentication key

Configure OSPF

To configure OSPF on the SSR, you must enable OSPF, create OSPF areas, assign
interfaces to OSPF areas, and, if necessary, specify any of the OSPF interface
parameters.
To configure OSPF, you may need to perform some or all of the following tasks:
1. Enable OSPF.
2. Create OSPF areas.
3. Create an IP interface or assign an IP interface to a VLAN.
4. Add IP interfaces to OSPF areas.
5. Configure OSPF interface parameters, if necessary.
Note:
By default, the priority of an OSPF router for an interface is set to zero,
which makes the router ineligible from becoming a designated router on the
network to which the interface belongs. To make the router eligible to
become a designated router, you must set the priority to a non-zero value.
Chapter 5