Routing

Overview of the ISO IS-IS Protocol

Thursday, February 12th, 2009

The IS-IS Routing Protocol has been developed in ISO to provide routing for pure OSI environments. In particular, IS-IS is designed to work in conjunction with ISO 8473 (The ISO Connectionless Network Layer Protocol [2]), and ISO 9542 (The ISO End System to Intermediate System Protocol [3]). This section briefly describes the manner in which [...]

EIGRP

Wednesday, February 11th, 2009

Enhanced Interior Gateway Routing Protocol - (EIGRP) is a Cisco proprietary routing protocol loosely based on their original IGRP. EIGRP is an advanced distance-vector routing protocol, with optimizations to minimize both the routing instability incurred after topology changes, as well as the use of bandwidth and processing power in the router. Routers that support EIGRP [...]

BGP

Wednesday, February 11th, 2009

The Border Gateway Protocol (BGP) is the core routing protocol of the Internet. It maintains a table of IP networks or ‘prefixes’ which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional IGP metrics, but makes routing decisions based on path, network policies and/or [...]