Foundry Networks AR3201 User Manual

Foundry AR-Series Router User Guide

4 - 2

© 2004 Foundry Networks, Inc.

June 2004

The following table provides Foundry Network’s BGP RFC compliance information.

Open Shortest Path First (OSPF), a link-state routing protocol, is used for routing IP packets. OSPF offers the 
following advantages:

•

Scalability 

OSPF is designed to operate with larger networks. It does not impose a hop-count restriction and permits its 
domain to be split into areas for easier management. 

•

Full subnetting support

OSPF can fully support subnetting, including Variable Length Subnet Mask (VLSM). 

•

Tagged routes 

Routes can be tagged with arbitrary values. This eases interoperation with 

Exterior Gateway Protocols 

(

EGPs), which can tag OSPF routes with AS numbers. 

•

Meshed networks

OSPF provides the ability to support complex meshed networks.

The following features are incorporated in Foundry’ implementation of OSPF.

•

Intra- and inter-area routing

•

Broadcast and point-to-point

•

Type 1 & Type 2 AS external routes

•

Stub areas

•

NSSA – Not-So-Stubby-Area

•

Route re-distribution 

•

Authentication – simple & MD5

•

RFC 1583 backwards compatibility

•

Equal cost multipath

•

Configurable routing interface parameters

•

Non-intrusive reconfiguration

2385

Protection of BGP sessions via the TCP MD5 signature option

1998

An application of the BGP community attribute in multi-home routing

1997 

BGP communities attribute

1775

BGP OSPF interaction

1771

Border Gateway Protocol 4 (BGP-4)