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Configuration Guide - IP Unicast Routing

S9300, S9300E, and S9300X V200R011C10

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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Summary of RIP Configuration Tasks

Summary of RIP Configuration Tasks

After basic RIP functions are configured, you can build a Layer 3 network using RIP. If other RIP functions are required, configure them according to reference sections.

Table 3-2 describes RIP configuration tasks.

Table 3-2  RIP configuration tasks

Scenario

Description

Task

Configuring basic RIP functions

Basic RIP functions include enabling RIP, specifying the network segment where RIP runs, and specifying the RIP version. The basic RIP functions must be configured before you use RIP features.

Configuring Basic RIP Functions

Configuring RIP-2 features

RIP-2 is a classless routing protocol, and RIP-2 packets carry subnet masks. Therefore, deploying a RIP-2 network can save IP addresses. Only RIP-2 can be deployed on a network where IP addresses are discontinuous, and RIP-1 cannot be used.

RIP-2 supports authentication for protocol packets and provides multiple authentication modes to enhance security.

Configuring RIP-2

Preventing routing loops

RIP is a distance-vector routing protocol. RIP devices advertise their local routing tables to neighbors, so routing loops may occur.

RIP uses split horizon and poison reverse to prevent routing loops:
  • Split horizon: A route learnt by RIP through an interface is not sent to neighbors through the interface. This saves bandwidth and prevents routing loops.
  • Poison reverse: RIP sets the cost of a route learnt through an interface to 16 (unreachable), and sends the route to neighbors through the interface. In this way, RIP deletes useless routes from the neighbor's routing table and prevents routing loops.

Preventing Routing Loops

Controlling RIP routing

To use RIP more flexibly on the existing network and meet various user requirements, you can configure different parameters to control RIP routing.

Controlling RIP Routing

Controlling the advertising and receiving of RIP routes

To meet network requirements, you can configure different parameters to accurately control the advertising and receiving of RIP routes.

Controlling RIP Route Advertisement

Controlling Receiving of RIP Routing Information

Improving RIP network performance

The following are ways of improving RIP network performance:
  • Adjust the RIP timer to change the RIP network convergence rate.
  • Adjust the number and interval of Update packets sent by an interface to save device resources and network bandwidth.
  • Enable the replay-protect function to ensure normal communication between neighboring devices after a RIP process restarts.
  • Check packet validity to ensure high network security.

Improving RIP Network Performance

Configuring BFD for RIP

RIP maintains neighbor relationships by periodically sending and receiving Update packets. If a device does not receive any Update packet from a neighbor within the aging time, it considers the neighbor Down. The default value of the aging timer is 180 seconds, so RIP can detect a link fault only after 180 seconds. If high-speed data services are deployed on the network, a large amount of data will be lost in this period.

BFD provides the millisecond-level fault detection mechanism. It can rapidly detect faults on the protected links or nodes, and report the faults to RIP. BFD improves the RIP process's response to network topology changes, which implements fast convergence of RIP routes.

Configuring BFD for RIP

Configuring the network management function for RIP

By binding RIP to the MIB, you can view RIP information and configure RIP through the NMS.

Configuring the Network Management Function for RIP

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Updated: 2019-10-22

Document ID: EDOC1000178418

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