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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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Displaying and Maintaining FIB Tables

Displaying and Maintaining FIB Tables

Context

NOTE:

Unless otherwise stated, FIB tables in this document refer to unicast FIB tables.

A device selects routes according to its IP routing table and forwards packets according to FIB tables. If the number of entries in a FIB table reaches or exceeds the limit, that is, the FIB table is overloaded, new active routes cannot be delivered to the FIB table, affecting packet forwarding.

Procedure

  • Check FIB entries.

    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] [ verbose ] command to check IPv4 FIB entries.
    • Run the display fib [ vpn-instance vpn-instance-name ] acl acl-number [ verbose ] command to check IPv4 FIB entries that match a specified ACL.
    • Run the display fib [ vpn-instance vpn-instance-name ] ip-prefix prefix-name [ verbose ] command to check IPv4 FIB entries that match a specified IP prefix list.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] destination-address1 [ verbose ] command to check IPv4 FIB entries that match a specified destination IP address.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] destination-address1 destination-mask1 [ verbose ] command to check IPv4 FIB entries that exactly match a specified destination IP address and mask.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] destination-address1 longer [ verbose ] command to check all IPv4 FIB entries that match destination IP addresses in the natural mask range.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] destination-address1 destination-mask1 longer [ verbose ] command to check all IPv4 FIB entries that match destination IP addresses in a specified mask range.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] destination-address1 destination-mask1 destination-address2 destination-mask2 [ verbose ] command to check IPv4 FIB entries that match destination IP addresses in the range of destination-address1 destination-mask1 and destination-address2 destination-mask2.
    • Run the display fib [ vpn-instance vpn-instance-name ] next-hop ip-address command to check IPv4 FIB entries that match a specified next-hop IP address.
    • Run the display fib [ slot-id ] [ vpn-instance vpn-instance-name ] statistics command to check the total number of IPv4 FIB entries.
    • Run the display fib [ slot-id ] statistics all command to check IPv4 FIB entry statistics.
    • Run the display ipv6 fib [ slot-id ] [ vpn-instance vpn-instance-name ] [ verbose ] command to check IPv6 FIB entries.
    • Run the display ipv6 fib [ slot-id ] [ vpn-instance vpn-instance-name ] ipv6-address [ verbose ] command to check IPv6 FIB entries that match a specified destination IPv6 address.
    • Run the display ipv6 fib [ slot-id ] [ vpn-instance vpn-instance-name ] ipv6-address prefix-length [ verbose ] command to check IPv6 FIB entries that exactly match a specified destination IPv6 address and mask.
    • Run the display ipv6 fib [ slot-id ] [ vpn-instance vpn-instance-name ] statistics command to check the total number of IPv6 FIB entries.
    • Run the display ipv6 fib [ slot-id ] statistics all command to check IPv6 FIB entry statistics.

  • Maintain FIB tables.

    • Configure periodic refresh of FIB entries.
      1. Run system-view

        The system view is displayed.

      2. Run undo fib regularly-refresh disable

        Periodic refresh of FIB entries is enabled.

        By default, periodic refresh of FIB entries is enabled.

      3. Run fib regularly-refresh { interval interval [ entry-number entry-number ] | entry-number entry-number | cycle-interval cycle-interval }

        The entire FIB entry update interval, FIB entry update interval per cycle, and the number of FIB entries updated per cycle are configured.

        By default, the entire FIB entry update interval is 1 minute, the FIB entry update interval per cycle is 1 second, and the number of FIB entries updated per cycle is 50.

    • Configure periodic refresh of IPv6 FIB entries.
      1. Run system-view

        The system view is displayed.

      2. Run undo ipv6 fib regularly-refresh disable

        Periodic refresh of IPv6 FIB entries is enabled.

      3. Run ipv6 fib regularly-refresh { interval interval | entry-number entry-number | cycle-interval cycle-interval }

        The entire IPv6 FIB entry update interval, IPv6 FIB entry update interval per cycle, and the number of IPv6 FIB entries updated per cycle are configured.

        By default, the entire IPv6 FIB entry update interval is 1 minute, the IPv6 FIB entry update interval per cycle is 1 second, and the number of IPv6 FIB entries updated per cycle is 50.

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Updated: 2019-10-18

Document ID: EDOC1000178018

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