- Foundry Router User Guide

Foundry AR-Series Router User Guide

RFC Compliance

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

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

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)