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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

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

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

  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 8800, 7800, 6800, and 5800 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.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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