Configuring an AS_Path Filter
Context
An AS_Path filter is used to filter routes based on the AS_Path attributes of BGP routes. If you do not want to receive routes of a specified AS number, configure an AS_Path filter based on the specified AS number. On a complex network, multiple ACLs or IP prefix lists must be configured to filter BGP routes. This can be a complicated process; configuring an AS_Path filter can simplify the configuration.
Procedure
- Run system-view
The system view is displayed.
- Run ip as-path-filter { as-path-filter-number | as-path-filter-name } [ index index-number ] { permit | deny } regular-expression
An AS_Path filter is configured.
In the preceding command, regular-expression indicates that the AS_Path filter uses a regular expression to define matching rules. For details about regular expressions, see "Overview of CLIs" in CloudEngine 12800 and 12800E Series Switches- Configuration Guide - Basic Configuration.
- Run commit
The configuration is committed.