Foundry Networks AR3202-CL - Manual (Page 47)

Foundry AR-Series Router User Guide
4 - 2 © 2004 Foundry Networks, Inc. June 2004
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)