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Configuration Guide - IP Unicast Routing

CloudEngine 12800 and 12800E V200R002C50

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.

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Configuring an AS_Path Filter

Configuring an AS_Path Filter


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.


  1. Run system-view

    The system view is displayed.

  2. 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.

  3. Run commit

    The configuration is committed.

Verifying the Configuration

  • Run the display ip as-path-filter [ as-path-filter-number | as-path-filter-name ] command to check information about the configured AS_Path filter.

Updated: 2019-03-21

Document ID: EDOC1000166601

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