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S600-E V200R011C10 Configuration Guide - IP Unicast Routing

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, Routing Policy ,and PBR, and provides configuration examples.
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Applying Filters to Advertised Routes

Applying Filters to Advertised Routes

Procedure

  • Configuring RIP to filter advertised routes
    1. Run system-view

      The system view is displayed.

    2. Run rip [ process-id ]

      The RIP view is displayed.

    3. Run filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name } export [ protocol [ process-id ] | interface-type interface-number ]

      Imported routes are filtered before being advertised.

      Routing information advertised by RIP may contain the routing information imported from other protocols. You can use the protocol parameter to filter the routing information imported from a specified routing protocol. If the protocol parameter is not used, all the routes advertised by RIP are filtered, including imported routes and local routes (direct routes).

      NOTE:

      RIP-2 defines a 16-bit tag, while other routing protocols define 32-bit tags. If the routes of other routing protocols are imported into RIP and the tag is used in the routing policy, the tag value cannot exceed 65535. If the tag value exceeds 65535, the routing policy becomes invalid or the matching result is incorrect.

  • Configuring OSPF to filter advertised routes
    1. Run system-view

      The system view is displayed.

    2. Run ospf [ process-id ]

      The OSPF process view is displayed.

    3. Run filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]

      OSPF is configured to filter the routes imported using the import-route command. Only the routes that pass the filtering criteria are advertised.

      • The acl-number parameter specifies the number of a basic ACL.
      • The acl-name acl-name parameter specifies the name of an ACL.
      • The ip-prefix ip-prefix-name parameter specifies the name of an IP prefix list.
      • The route-policy route-policy-name parameter specifies the name of a route policy.

      To filter the routes of a specific routing protocol or OSPF process, specify the protocol [ process-id ] parameter. If this parameter is not specified, OSPF filters all the imported routes.

      NOTE:
      • The import-route command cannot import external default routes.
      • OSPF filters imported routes and generates Type 5 LSAs to advertise only external routes that pass the filtering criteria.

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Updated: 2019-03-30

Document ID: EDOC1000178018

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