apply qos-local-id

Usage Scenario

Run the route-policy command to enter the Route-policy view.

A route-policy may consist of multiple nodes. The relationship between the nodes is "OR". The system matches a route against the nodes in sequence. If the route matches a node, the route matches the route-policy, and the system no longer matches it against other nodes.

Each node comprises a set of if-match and apply clauses. The if-match clauses define the filtering rules that are used to match certain route attributes. The relationship among if-match clauses of the same node that are based on different route attributes is AND. A route matches a node only when the route matches all the filtering rules specified in the if-match clauses of the node. The apply clauses specify actions. The relationship among if-match clauses of the same node that are based on the same route attribute is OR. The system matches routes against the if-match clauses in order. If a route matches an if-match clause, the system no longer matches the route against the rest if-match clauses. For example, the if-match community-filter 1 and if-match as-path-filter 1 configurations in node 10 are based on different route attributes. Therefore, the relationship among if-match clauses of this node is AND. The if-match community-filter 1 and if-match community-filter 2 configurations in node 20 are both based on the community attribute. Therefore, the relationship among if-match clauses of this node is OR. The apply clauses specify actions. If a route matches a node, the apply clauses set some attributes for the route.

The QoS local ID is a local identifier of QoS. You can run the apply qos-local-id command to set the QoS local ID in the route-policy. The QoS local ID set in the route-policy is delivered to the FIB. During packet forwarding, the system obtains the QoS local ID from the FIB and applies the related QoS policy according to the QoS local ID.

Prerequisites

A route-policy has been configured using the route-policy command.

Implementation Procedure

The apply ip precedence command applies to QPPB, in which the IP precedence can be set. After receiving routes, a BGP device matches the attributes of the BGP routes against the import routing policy, sets parameters such as the IP precedence for the BGP routes, delivers the BGP routing information and associated QoS parameters, and configures QoS traffic policies for the classified data flows. In this case, the BGP route receiver can apply QoS policies to the data sent to the destination network segment based on the IP precedence. This applies QoS policies in BGP.

Precautions

To set a QoS local ID for the routes to be imported, you can configure one in a route-policy using the apply qos-local-id command and then set the route-policy as an import policy. Alternatively, you can configure a QoS local ID using the qos-local-id command. If different QoS local IDs are configured using the two methods, the one configured using the first method takes effect.