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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 Single-hop BFD for Detecting Faults on a Layer 2 Link

Example for Configuring Single-hop BFD for Detecting Faults on a Layer 2 Link

Networking Requirements

As shown in Figure 2-20, SwitchA and SwitchB are connected through a Layer 2 interface. Faults on the link between SwitchA and SwitchB need to be fast detected.

Figure 2-20  Single-hop BFD for detecting faults on a Layer 2 link

Configuration Roadmap

The configuration roadmap is as follows:

Configure BFD sessions on SwitchA and SwitchB to detect faults on the link between SwitchA and SwitchB.

Procedure

  1. Configure single-hop BFD on SwitchA.

    # Enable BFD on SwitchA.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchA
    [SwitchA] bfd
    [SwitchA-bfd] quit

    # Create a BFD session on SwitchA.

    [SwitchA] bfd atob bind peer-ip default-ip interface gigabitethernet 1/0/1
    [SwitchA-bfd-session-atob] discriminator local 1
    [SwitchA-bfd-session-atob] discriminator remote 2
    [SwitchA-bfd-session-atob] commit
    [SwitchA-bfd-session-atob] quit
    

  2. Configure single-hop BFD on SwitchB.

    # Enable BFD on SwitchB.

    <HUAWEI> system-view
    [HUAWEI] sysname SwitchB
    [SwitchB] bfd
    [SwitchB-bfd] quit

    # Create a BFD session on SwitchB.

    [SwitchB] bfd btoa bind peer-ip default-ip interface gigabitethernet 1/0/1
    [SwitchB-bfd-session-btoa] discriminator local 2
    [SwitchB-bfd-session-btoa] discriminator remote 1
    [SwitchB-bfd-session-btoa] commit
    [SwitchB-bfd-session-btoa] quit

  3. Verify the configuration.

    After the configuration is complete, run the display bfd session all verbose command on SwitchA and SwitchB. You can see that a single-hop BFD session is set up and its status is Up.

    The display on SwitchA is used as an example.

    [SwitchA] display bfd session all verbose
    --------------------------------------------------------------------------------
    Session MIndex : 4097      (One Hop) State : Up        Name : atob
    --------------------------------------------------------------------------------
      Local Discriminator    : 1              Remote Discriminator   : 2
      Session Detect Mode    : Asynchronous Mode Without Echo Function
      BFD Bind Type          : Interface(GigabitEthernet1/0/1)
      Bind Session Type      : Static
      Bind Peer IP Address   : 224.0.0.184
      NextHop Ip Address     : 224.0.0.184
      Bind Interface         : GigabitEthernet1/0/1
      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       : 3784             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

    # Run the shutdown command on GE1/0/1 of SwitchA to simulate a link fault.

    [SwitchA] interface gigabitethernet 1/0/1
    [SwitchA-GigabitEthernet1/0/1] shutdown
    [SwitchA-GigabitEthernet1/0/1] quit

    After the configuration is complete, run the display bfd session all verbose command on SwitchA and SwitchB. You can see that a single-hop BFD session is set up and its status is Down. The display on SwitchA is used as an example.

    [SwitchA] display bfd session all verbose
    --------------------------------------------------------------------------------
    Session MIndex : 4097      (One Hop) State : Down        Name : atob
    --------------------------------------------------------------------------------
      Local Discriminator    : 1              Remote Discriminator   : 2
      Session Detect Mode    : Asynchronous Mode Without Echo Function
      BFD Bind Type          : Interface(GigabitEthernet1/0/1)
      Bind Session Type      : Static
      Bind Peer IP Address   : 224.0.0.184
      NextHop Ip Address     : 224.0.0.184
      Bind Interface         : GigabitEthernet1/0/1
      FSM Board Id           : 0                TOS-EXP                : 7
      Min Tx Interval (ms)   : 1000             Min Rx Interval (ms)   : 1000
      Actual Tx Interval (ms): 13000            Actual Rx Interval (ms): 13000
      Local Detect Multi     : 3                Detect Interval (ms)   : -
      Echo Passive           : Disable          Acl Number             : -
      Destination Port       : 3784             TTL                    : 255 
      Proc Interface Status  : Disable          Process PST            : Disable
      WTR Interval (ms)      : -                  
      Active Multi           : 3                DSCP                   : - 
      Last Local Diagnostic  : Control Detection Time Expired
      Bind Application       : No Application Bind
      Session TX TmrID       : 16402            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 : 0/1

Configuration Files

  • SwitchA configuration file

    #
    sysname SwitchA
    #
    bfd
    #
    bfd atob bind peer-ip default-ip interface GigabitEthernet1/0/1
     discriminator local 1
     discriminator remote 2
     commit
    #
    return
  • SwitchB configuration file

    #
    sysname SwitchB
    #
    bfd
    #
    bfd btoa bind peer-ip default-ip interface GigabitEthernet1/0/1
     discriminator local 2
     discriminator remote 1
     commit
    #
    return
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Updated: 2019-09-23

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