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Configuration Guide - IP Unicast Routing

S9300, S9300E, and S9300X V200R011C10

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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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 } { 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.

Verifying the Configuration

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

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Updated: 2019-10-22

Document ID: EDOC1000178418

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