Blade ICE RACKSWITCH G8124-E Manual De Usuario

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BMD00220, October 2010
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OSPF
BLADEOS supports the Open Shortest Path First (OSPF) routing protocol. The BLADEOS 
implementation conforms to the OSPF version 2 specifications detailed in Internet RFC 1583, and 
OSPF version 3 specifications in RFC 2740. The following sections discuss OSPF support for the 
RackSwitch G8124:

. This section provides information on OSPFv2 concepts, 
such as types of OSPF areas, types of routing devices, neighbors, adjacencies, link state 
database, authentication, and internal versus external routing.

This section describes how OSPFv2 is 
implemented in BLADEOS, such as configuration parameters, electing the designated router, 
summarizing routes, defining route maps and so forth.

. This section provides step-by-step 
instructions on configuring different OSPFv2 examples:

Creating a simple OSPF domain

Creating virtual links

Summarizing routes

. This section describes differences and 
additional features found in OSPFv3.
OSPFv2 Overview
OSPF is designed for routing traffic within a single IP domain called an Autonomous System (AS). 
The AS can be divided into smaller logical units known as areas.
All routing devices maintain link information in their own Link State Database (LSDB). The LSDB 
for all routing devices within an area is identical but is not exchanged between different areas. Only 
routing updates are exchanged between areas, thereby significantly reducing the overhead for 
maintaining routing information on a large, dynamic network.
The following sections describe key OSPF concepts.