Switching White Papers
Integrating Enhanced IGRP Into Existing Networks
Overview The Enhanced Interior Gateway Routing Protocol (IGRP) combines the ease of use of traditional routing protocols with the fast rerouting capabilities of link-state protocols, providing advanced capabilities for fast convergence and partial updates. When a network topology change occurs, the Diffusing Algorithm (DUAL) used with Enhanced IGRP provides convergence in less than five seconds in most cases. This is equivalent to the convergence achieved by link-state protocols such as Open Shortest Path First (OSPF), Novell Link Services Protocol (NLSP), and Intermediate System-to-Intermediate System (IS-IS). In addition, Enhanced IGRP sends routing update information only when changes occur, and only the changed information is sent to affected routers. The case study provided here discusses the benefits and considerations involved in integrating Enhanced IGRP into the existing IP networks running IGRP; existing IPX networks running RIP and SAP; and existing AppleTalk networks running the Routing Table Maintenance Protocol (RTMP).
| Publisher | Cisco | File Format | HTML |
|---|---|---|---|
| Date Published | April 2001 | Downloads | 17 |
| Format | White Papers | ||
| Topics | |||
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