Foundry Networks AR3202-CL, AR3201-CL, AR1204, AR1216, AR1208 BGP RFC Compliance, Description

Foundry AR-Series Router User Guide

RFC Compliance

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

	Table 4.1: BGP RFC Compliance
RFC	Description
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)

OSPF

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

4 - 2 © 2004 Foundry Networks, Inc. June 2004