Rip Configuration; Rip Overview; Rip Basics; Rip Routing Metric - Zte ZXR10 5900E Series User Manual

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RIP Configuration

Table of Contents
RIP Overview ..................................................................... 7
Configuring RIP .................................................................. 9
RIP Configuration Example..................................................11
RIP Maintenance and Diagnosis ...........................................11

RIP Overview

RIP Basics

RIP is a relatively old but still commonly used interior gateway
protocol created for use in small, homogeneous networks. It is a
classical distance-vector routing protocol. RIP is documented in
RFC 1058. RIPv2 is defined by RFC2453.
ZXR10 5900E supports RIPv1 and RIPv2 and adopts RIPv2 by de-
fault. Comparing with RIPv1, RIPv2 has the following advantages:
� Subnet mask contained in the routing update
� Authentication of the routing update
� Multicast route update

RIP Routing Metric

RIP uses the UDP packet (port number 520) to exchange RIP rout-
ing information. Routing information in the RIP packet includes
the number of routers that a route passes (that is, hops). Router
determines the route to the destination network according to hops.
RFC stipulates that the maximum hop count cannot go beyond 16,
so RIP is only applicable to a small-sized network. Hop count 16
indicates the infinite distance and this means that the route is un-
reachable. Besides, this is a method for RIP to identify and avoid
route loop.
RIP only takes the hop count as the metric and does not consider
the bandwidth, delay or other variable factors during the routing.
RIP always takes the path with the minimum hop count as the
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