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. Go to the AS_Path Lists page.
2. Click Create AS_Path List in the upper right corner.

   The Create AS_Path List dialog box is displayed.

3. 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+

4. 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.