Contents
How are route filters used in Junos OS?
The topic, Configuring Route Filters, describes default Junos OS behavior. The walkup feature, which is not covered in this topic, alters the evaluation results discussed in this topic by allowing the router to consider shorter match conditions configured within the same term. See Walkup for Route Filters Overview for details.
How to use a route filter list in a policy statement?
Once configured, the route-filter-list is used by referencing its route-filter-list-name in a policy-statement at the [edit policy-options policy-statement policy-statement-name term term-name from] hierarchy level. Route filter lists can be used in conjunction with other route-filter statements.
How does Junos OS update the routing table?
In the event of a network topology change, Junos OS updates these routes in the routing table before updating other routes with lower priority. You can also tag some routes to identify and reject them based on your requirement. term term-name —Name that identifies the term.
When do you omit the from in routing policy?
If you omit the from, all routes are considered to match. All routes then take the configured actions of the policy term. In the to statement, you define the criteria that an outgoing route must match. You can specify one or more match conditions. If you specify more than one, they all must match the route for a match to occur.
Which is the default control action in Junos OS?
Any accept or reject action specified in the then statement is skipped. Any actions in the then statement that manipulate route characteristics are applied to the route. next term is the default control action if a match occurs and you do not specify a flow control action. On Junos OS Evolved, next term cannot appear as the last term of the action.
How are route filters used in routing policy?
To configure a route filter, include one or more route-filter or source-address-filter statements: The route-filter option is typically used to match an incoming route address to destination match prefixes of any type except for unicast source addresses.
How to change color preference in Junos OS?
If you set the preference with the color action, the value is internal to Junos OS and is not transitive. Change the color preference value by the specified amount. If an addition operation results in a value that is greater than 4,294,967,295 (2 32 – 1), the value is set to 2 32 – 1.