Routing Information Protocol (Rip); Protocol Overview; Ripv1 - Dell Force10 S4810P Configuration Manual

Routing Information Protocol (RIP)

Routing Information Protocol (RIP)
Routing Information Protocol (RIP) is based on a distance-vector algorithm, it tracks distances or hop
counts to nearby routers when establishing network connections.
• Protocol Overview on page 843
• Implementation Information on page 844
• Configuration Information on page 844
• RIP Configuration Example on page 852
RIP protocol standards are listed in the

Protocol Overview

RIP is the oldest interior gateway protocol. There are two versions of RIP: RIP version 1 (RIPv1) and RIP
version 2 (RIPv2). These versions are documented in RFCs 1058 and 2453.

RIPv1

RIPv1 learns where nodes in a network are located by automatically constructing a routing data table. The
routing table is established after RIP sends out one or more broadcast signals to all adjacent nodes in a
network. Hop counts of these signals are tracked and entered into the routing table, which defines where
nodes in the network are located.
The information that is used to update the routing table is sent as either a request or response message. In
RIPv1, automatic updates to the routing table are performed as either one-time requests or periodic
responses (every 30 seconds). RIP transports its responses or requests by means of UDP over port 520.
RIP must receive regular routing updates to maintain a correct routing table. Response messages
containing a router's full routing table are transmitted every 30 seconds. If a router does not send an update
within a certain amount of time, the hop count to that route is changed to unreachable (a route hop metric
of 16 hops). Another timer sets the amount of time before the unreachable routes are removed from the
routing table.
This first RIP version does not support VLSM or CIDR and is not widely used.
is supported only on platforms:
Chapter 56, Standards Compliance
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