Creating an AS_Path List

Scenarios

This section describes how to create an AS_Path list.

Notes and Constraints

Each filter in an AS_Path list must have its unique sequence number.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select the desired region and project.
3. Click Service List and choose Networking > Enterprise Router.

   The Enterprise Router homepage is displayed.

4. In the navigation pane on the left, choose Routing Control > AS_Path Lists.

   The AS_Path Lists page is displayed.

5. Click Create AS_Path List in the upper right corner.

   The Create AS_Path List dialog box is displayed.

6. Configure the parameters based on Table 1.

   Table 1 Parameters for creating an AS_Path list

   Parameter	Description	Example Value
   Name	Mandatory Enter the name of the AS_Path list. The name: Can contain 1 to 64 characters. Can contain letters, digits, underscores (_), hyphens (-), and periods (.).	asPathFilter-ab
   Description	Optional Enter the description of the AS_Path list in the text box as required.	-
   AS_Path Filters	Mandatory Configure parameters of the AS_Path filters: Sequence Number: An AS_Path list consists of one or more AS_Path filters that are applied to filter routes based on their sequence numbers, in ascending order. A sequence number can be from 0 to 65535. Action: Select Allow or Deny. If a route matches an AS_Path filter with Action set to Allow, the route is allowed. If the AS_Path filter has Action set to Deny, the route is denied. Regular Expression: A string that describes a characteristic and verifies whether another string conforms to this characteristic. An AS_Path filter defines an AS_Path regular expression to match AS_Path attributes of BGP routes for filtering BGP routes. For details, see AS_Path Regular Expressions.	Sequence Number: 10 Action: Allow Regular Expression: 65+

7. Click OK.

   On the AS_Path Lists page, you can view the created AS_Path list.

Follow-Up Operations

Creating a Route Policy: An AS_Path list takes effect through a route policy.