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Example: Controlling Traffic in a RIP Network with an Outgoing Metric

This example shows how to control traffic with an outgoing metric.

Requirements

Before you begin:

  • Define RIP groups, and add interfaces to the groups. Then configure a routing policy to export directly connected routes and routes learned through RIP routing exchanges. See Example: Configuring a Basic RIP Network.

Overview

In this example, each route from Router A to Router D has two hops as shown in Figure 1. However, because the link from Router A to Router B in the RIP group has a higher bandwidth than the link from Router A to Router C in RIP group Alpha 1, you want traffic from Router D to Router A to flow through Router B. To control the way Router D sends traffic to Router A, you can alter the routes that Router D receives by configuring the outgoing metric on Router A's interfaces in the Alpha 1 RIP group.

Figure 1: Controlling Traffic in a RIP Network with the Outgoing Metric

Controlling Traffic in a RIP Network with the Outgoing Metric

If the outgoing metric for the Alpha 1 RIP group—the A-to-C link—is changed to 3, Router D calculates the total path metric from Router A through Router C as 4. In contrast, the unchanged default total path metric to Router A through Router B in the RIP group is 2. The fact that Router A's interfaces belong to two different RIP groups allows you to configure two different outgoing metrics on its interfaces, because you configure path metrics at the group level.

By configuring the outgoing metric, you control the way Router A sends traffic to Router D. By configuring the outgoing metric on the same router, you control the way Router D sends traffic to Router A.

This example uses an outgoing metric of 3.

Configuration

Step-by-Step Procedure

To control traffic with an outgoing metric:

  1. Set the outgoing metric.
    [edit protocols rip group alpha1]user@host# set metric-out 3
  2. If you are done configuring the device, commit the configuration.
    [edit]user@host# commit

Verification

To verify that the configuration is working properly, enter the show protocols rip command.

 

Related Documentation

 

Published: 2013-08-15

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