User's Manual

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Chapter 58 Configuring RIP
58.1 Overview
The chapter illustrates how to configure the RIP. If you would like to have the detailed description on the RIP
commands in this section, you can refer to the Chapter of "RIP Commands" in the "Reference for the Network
Protocol Commands". If you would like to search the document with other commands, you can use the master
index for commands and conduct inline search.
The Route Information Protocol (RIP) is a relatively old but still commonly used Interior Gateway Protocol (IGP),
which is mainly used in the small-sized network of the same kind.. And RIP is a traditional Distance Vector
Routing Protocol, which occurs in the RFC 1058.
RIP exchanges Routing Information through broadcasting UDP Packets. In the Router, the update Route
Information will be sent every 30 seconds. In case that no update information from the neighbor router has
been received within 180 seconds, the Routes from that neighboring router in the Routing Table will then be
labeled as "Unusable". And if there is still no updated information received in the next 120 seconds, these
Routes will be deleted from the Routing Table.
The Hop Count is taken by the RIP as a metric to measure different routes. And the Hop Count refers to the
number of the passed routers of packets from the Source to the destination. The metric of the Route that is
directly connected to the Network is "0", the metric of the Route whose network is not able to reach is "16". As
the Route metric used by the RIP is in a relatively small range, it is not applicable to large-scale network. .
If a router has a default route, RIP then will advertises the route to the false Network of 0.0.0.0. In fact, the
0.0.0.0 network does not exist, which is only used for realizing the function of default route in RIP.. If the RIP
has learned a default route, or the default gateway is configured in router and configured with default metric,
the router will then announce the default network.
The RIP will send the updates to the interface of the appointed network. If the network of the very interface is
not appointed, the network then will not be announced in any RIP updating. .
The RIP-2 of our company's router supports Plaintext and MD5 Authentication, Route Summary, CIDR and
VLSM.
58.2 RIP Configuration Task List
If you would like to configure the RIP, the following tasks are necessary. While you have to first activate the
RIP, the other tasks are optional.
Starting the RIP
Enabling Unicasting of RIP route update messages.
Applying the offset on the route metric
Regulating the Timer
Designating the RIP Version Number
Activating the RIP Authentication
Prohibitting Route summary
Prohibitting the Authentication on Source IP Address