Route Preferences Example

When a destination network is learned from two different routing protocols, RIP and OSPF, for example, a router can choose one protocol over another.

The figure below shows the network configuration for the example:



In the figure, the top part of network is running OSPF, the bottom part of network is running RIP. Gateway 3 (GW-3) learns network 205.226.22.0 from two routing protocols: RIP from bottom network, and OSPF from top part of network. When other hosts want to go to 205.226.22.0 through GW-3, GW-3 can select one protocol route, say OSPF route first, to reach the destination. If that route is broken, then GW-3 will use another available route to reach destination.

To configure the routing preferences:

  1. Click .
  2. Click the Route Preferences link in the Routing Configuration section.
  3. In the OSPF field enter: 10.
  4. In the RIP field enter: 40.
  5. Click .

This will make the OSPF route the preferred route, If you wanted to have the RIP route be the preferred route type 40 for OSPF and 10 for RIP.

Copyright © 1997 Ipsilon Networks, Inc.
Portions copyright © Digital Equipment Corporation 1998. All rights reserved.
Updated January 8, 1998
Send comments to Digital Equipment Corporation, doc-quality@lkg.mts.dec.com