IGRP AND EIGRP

As just stated, the IGRP and the EIGRP are routing protocols developed by Cisco and EIGRP has replaced IGRP in many systems. Table 8-1 summarizes the major attributes of these protocols, and will be a convenient reference as we proceed through this discussion.

Table 8-1. Inter-Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP)

  • Proprietary protocols from Cisco

  • Distance vector protocols with metrics based on:

    Fixed delay between nodes (D)

    Bandwidth (B)

    Traffic load (L)

    Error rate on the path: reliability (R)

    Count of the hops on the path to the destination (H)

    The path's MTU

  • Support load balancing across multiple paths to a destination

  • Use triggered updates, split horizon, and holddown

  • EIGRP also has:

    CIDR prefixes

    Better methods for ...

Get IP Routing Protocols now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial