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Configuration Guide - Reliability

S7700 and S9700 V200R011C10

This document describes the configuration of BFD, DLDP, VRRP, SmartLink, CFM, EFM, Y.1731 and MAC swap loopback to ensure reliability on the device.
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Example for Configuring Multi-Hop BFD for IPv6

Example for Configuring Multi-Hop BFD for IPv6

Networking Requirements

In Figure 2-28, SwitchA is connected to SwitchC through SwitchB. SwitchA and SwitchC communicate with each other using static routes. The customer requires that link failures between switches be quickly detected.

Figure 2-28  Networking diagram of configuring multi-hop BFD for IPv6

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure a BFD6 session on SwitchA to detect the multi-hop link from SwitchA to SwitchC.

  2. Configure a BFD6 session on SwitchC to detect the multi-hop link from SwitchC to SwitchA.

NOTE:

The intervals for sending and receiving BFD packets and local detection multiplier retain the default settings.

Procedure

  1. Assign IPv6 addresses to the interfaces on SwitchA, SwitchB, and SwitchC.

    # Assign an IPv6 address to the interface on SwitchA.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchA
    [SwitchA] ipv6
    [SwitchA] interface GigabitEthernet 1/0/1
    [SwitchA-GigabitEthernet1/0/1] undo portswitch
    [SwitchA-GigabitEthernet1/0/1] ipv6 enable
    [SwitchA-GigabitEthernet1/0/1] ipv6 address fc00:0:0:2001::1 64
    [SwitchA-GigabitEthernet1/0/1] quit

    # Assign an IPv6 address to the interface on SwitchB.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchB
    [SwitchB] ipv6
    [SwitchB] interface GigabitEthernet 1/0/1
    [SwitchB-GigabitEthernet1/0/1] undo portswitch
    [SwitchB-GigabitEthernet1/0/1] ipv6 enable
    [SwitchB-GigabitEthernet1/0/1] ipv6 address fc00:0:0:2001::2 64
    [SwitchB-GigabitEthernet1/0/1] quit
    [SwitchB] interface GigabitEthernet 1/0/2
    [SwitchB-GigabitEthernet1/0/2] undo portswitch
    [SwitchB-GigabitEthernet1/0/2] ipv6 enable
    [SwitchB-GigabitEthernet1/0/2] ipv6 address fc00:0:0:2002::1 64
    [SwitchB-GigabitEthernet1/0/2] quit

    # Assign an IPv6 address to the interface on SwitchC.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchC
    [SwitchC] ipv6
    [SwitchC] interface GigabitEthernet 1/0/2
    [SwitchC-GigabitEthernet1/0/2] undo portswitch
    [SwitchC-GigabitEthernet1/0/2] ipv6 enable
    [SwitchC-GigabitEthernet1/0/2] ipv6 address fc00:0:0:2002::2 64
    [SwitchC-GigabitEthernet1/0/2] quit

  2. Configure IPv6 static routes between SwitchA and SwitchC.

    # Configure the static route on SwitchA.

    [SwitchA] ipv6 route-static fc00:0:0:2002:: 64 fc00:0:0:2001::2

    # Configure the static route on SwitchC.

    [SwitchC] ipv6 route-static fc00:0:0:2001:: 64 fc00:0:0:2002::1

  3. Configure multi-hop BFD between SwitchA and SwitchC.

    # Configure a BFD6 session on SwitchA to SwitchC. You do not need to bind the BFD6 session to an outbound interface.

    [SwitchA] bfd
    [SwitchA-bfd] quit
    [SwitchA] bfd atoc bind peer-ipv6 fc00:0:0:2002::2
    [SwitchA-bfd-session-atoc] discriminator local 10
    [SwitchA-bfd-session-atoc] discriminator remote 20
    [SwitchA-bfd-session-atoc] commit
    [SwitchA-bfd-session-atoc] quit

    # Configure a BFD6 session on SwitchC to SwitchA. You do not need to bind the BFD6 session to an outbound interface.

    [SwitchC] bfd
    [SwitchC-bfd] quit
    [SwitchC] bfd ctoa bind peer-ipv6 fc00:0:0:2001::1
    [SwitchC-bfd-session-ctoa] discriminator local 20
    [SwitchC-bfd-session-ctoa] discriminator remote 10
    [SwitchC-bfd-session-ctoa] commit
    [SwitchC-bfd-session-ctoa] quit

  4. Verify the configuration.

    # When the network runs stably, run the display bfd session all verbose command on SwitchA and SwitchC. A multi-hop BFD6 session exists and its status is Up.

    SwitchA is used as an example.

    [SwitchA] display bfd session all verbose
    --------------------------------------------------------------------------------
    Session MIndex : 256       (Multi Hop) State : Up        Name : atoc
    --------------------------------------------------------------------------------
    Local Discriminator    : 10               Remote Discriminator   : 20
    Session Detect Mode    : Asynchronous Mode Without Echo Function
    BFD Bind Type          : Peer IP Address
    Bind Session Type      : Static
    Bind Peer IP Address   : FC00:0:0:2002::2
    Bind Interface         : -
    FSM Board Id           : 0                TOS-EXP                : 7
    Min Tx Interval (ms)   : 1000             Min Rx Interval (ms)   : 1000
    Actual Tx Interval (ms): 1000             Actual Rx Interval (ms): 1000
    Local Detect Multi     : 3                Detect Interval (ms)   : 3000
    Echo Passive           : Disable          Acl Number             : -
    Destination Port       : 4784             TTL                    : 255
    Proc Interface Status  : Disable          Process PST            : Disable
    WTR Interval (ms)      : -
    Active Multi           : 3                DSCP                   : -
    Last Local Diagnostic  : No Diagnostic
    Bind Application       : No Application Bind
    Session TX TmrID       : -                Session Detect TmrID   : -
    Session Init TmrID     : -                Session WTR TmrID      : -
    Session Echo Tx TmrID  : -
    PDT Index              : FSM-0 | RCV-0 | IF-0 | TOKEN-0
    Session Description    : -
    --------------------------------------------------------------------------------
    
    Total UP/DOWN Session Number : 1/0

Configuration Files

  • SwitchA configuration file

    #
    sysname SwitchA
    #
    ipv6
    #
    bfd
    #
    interface GigabitEthernet1/0/1
     undo portswitch
     ipv6 enable
     ipv6 address FC00:0:0:2001::1/64
    #
    bfd atoc bind peer-ipv6 FC00:0:0:2002::2
     discriminator local 10
     discriminator remote 20
     commit
    #
    ipv6 route-static FC00:0:0:2002:: 64 FC00:0:0:2001::2 
    #
    return
    
  • SwitchB configuration file

    #
    sysname SwitchB
    #
    ipv6
    #
    interface GigabitEthernet1/0/1
     undo portswitch
     ipv6 enable
     ipv6 address FC00:0:0:2001::2/64
    #
    interface GigabitEthernet1/0/2
     undo portswitch
     ipv6 enable
     ipv6 address FC00:0:0:2002::1/64
    #
    return
    
  • SwitchC configuration file

    #
    sysname SwitchC
    #
    ipv6
    #
    bfd
    #
    interface GigabitEthernet1/0/2
     undo portswitch
     ipv6 enable
     ipv6 address FC00:0:0:2002::2/64
    #
    bfd ctoa bind peer-ipv6 FC00:0:0:2001::1
     discriminator local 20
     discriminator remote 10
     commit
    #
    ipv6 route-static FC00:0:0:2001:: 64 FC00:0:0:2002::1 
    #
    return
    
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Updated: 2019-09-23

N. documento: EDOC1000178318

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