Routing Control Overview
OBJECTIVE
The purpose of this post is to present an introduction to Routing Policy and Routing Control - Routing Control Overview.
Technical Backgroung
• R1 imports the network segment routes of services A and B to R1, but does not import the route destined for the service C network segment. When R3 imports OSPF routes to the IS-IS routing table, R3 needs to import only the route destined for the service B network segment.
• In this case, a tools is required to control routes to be imported.
Routing Control Overview
Route control can be implemented using a route-policy. The route-policy is flexibly used in the following scenarios:
▫ Controlling route advertisement: A route-ppolicy is used to filter the routes to be advertised so that a device advertises only the routes that match matching conditions.
▫ Controlling route receipt: A route-policy is used to filter the routes ro be accepted so that a device accepts only the routes that match mat conditions.
▫ Controlling route import: A route-policy is used to filter the routes to be imported so that a device imports only the routes that matching conditions.
Reference:
HCIP-Datacom-Core Technology V1.0 Training Material
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