Routing Policy Actions
An action is what the policy framework software does if a route matches all criteria defined in a match condition. You can configure one or more actions in a term. The policy framework software supports the following types of actions:
- Flow control actions, which affect whether to accept or reject the route or whether to evaluate the next term or routing policy
- Actions that manipulate route characteristics
- Trace action, which logs route matches
Manipulating the route characteristics allows you to control which route is selected as the active route to reach a destination. In general, the active route is also advertised to a routing platform’s neighbors. You can manipulate the following route characteristics: AS path, class, color, community, damping parameters, destination class, external type, next hop, load balance, local preference, metric, origin, preference, and tag.
For the numeric information (color, local preference, metric, preference, and tag), you can set a specific value or change the value by adding or subtracting a specified amount. The addition and subtraction operations do not allow the value to exceed a maximum value and drop below a minimum value.
For more information about the properties you can change and the addition and subtraction operations, see Configuring Actions in Routing Policy Terms.
