Route policies contain policy statements containing ordered entries containing match conditions and actions you specify. The entries should be sequenced from the most explicit to least explicit. Packet forwarding and routing can be implemented according to your defined policies. Policy-based routing allows you to dictate where traffic can be routed, through specific paths, or whether to forward or drop the traffic.
Route policies can match a specific route policy entry and continue searching for other matches within either the same route policy or the next route policy.
The process can stop when the first complete match is found and executes the action defined in the entry, either to accept or reject packets that match the criteria or proceed to the next entry or the next policy. You can specify matching criteria based on source, destination, or particular properties of a route. Route policies can be constructed to support multiple stages to the evaluation and setting various route attributes. You can also provide more matching conditions by specifying criteria such as:
prefix list
A named list of prefixes.
To and From criteria
A route source and destination.