apply origin

Function

The apply origin command sets the Origin attribute of BGP routes.

The undo apply origin command cancels the configuration.

By default, no Origin attribute is set for BGP routes.

Format

apply origin { egp { egpVal } | igp | incomplete }

undo apply origin

Parameters

Parameter Description Value
egp

Sets the Origin attribute of BGP routes to EGP.

-

egpVal

Specifies an AS number.

  • The value is an integer ranging from 1 to 4294967295.
  • The value is in the format of x.y, in which x and y are integers ranging from 1 to 65535 and from 0 to 65535, respectively.
igp

Sets the Origin attribute of BGP routes to IGP.

-

incomplete

Sets the Origin attribute of BGP routes to unknown.

-

Views

Route-policy view

Default Level

2: Configuration level

Task Name and Operations

Task Name Operations
route-base write

Usage Guidelines

Usage Scenario

The Origin attribute, as a proprietary attribute of BGP, defines the origin of a route. It identifies how a BGP route is generated. You can use the apply origin command to set the origin of BGP routes.

  • 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.

Prerequisites

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

Configuration Impact

After a BGP route matches a route-policy, the origin of the BGP route is changed.

Example

# Set the origin of BGP routes as IGP.
<HUAWEI> system-view
[~HUAWEI] route-policy policy permit node 10
[*HUAWEI-route-policy] apply origin igp
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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