IGRP Metrics

IGRP is a distance-vector routing protocol designed for use within autonomous systems. IGRP, like other distance-vector routing protocols (such as RIP and RIPv2), forwards its entire routing table, with the exception of split-horizon routes, on a regular basis. IGRP, unlike most other distance-vector protocols, uses a series of metrics rather than a single hop-count metric. These metrics are as follows:

• Link bandwidth

• Reliability

IGRP supports multipath routing, load balancing across two, three or four links, with automatic link recovery from a failed link.

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