34.3.2 Verifying BFD Sessions

<Structure of this section>

(1) Checking BFD Session Info

Use show bfd session command to view BFD sessioninformation. If you specify IP addressing or specify detail parameter, more information is displayed.

Figure 34-5: Result of executing show bfd session command
> show bfd session Date 20XX/07/10 18:37:50 UTC Total: 3 sessions RemoteAddress VRF Index State DetectTime TrackName 172.16.10.11 - 2 Down - Network2 192.168.16.5 2 1 Up 440 Network1 192.168.22.1 2 3 AdminDown - BGP0100 >

Figure 34-5: Result of executing show bfd session command

> show bfd session
Date 20XX/07/10 18:37:50 UTC
Total: 3 sessions
RemoteAddress                        VRF Index State  DetectTime TrackName
172.16.10.11                           -     2 Down            - Network2
192.168.16.5                           2     1 Up            440 Network1
192.168.22.1                           2     3 AdminDown       - BGP0100
>

Figure 34-6: Result of executing show bfd session command. (Detailed display)
> show bfd session vrf 2 ip 192.168.16.5 Date 20XX/05/22 15:55:33 UTC Session Index 1 State : Up Remote System : 192.168.16.5 VRF:2 Local System : 192.168.16.1 VRF:2 Discriminator : Hex Decimal Remote : 0xbce20002 3168927746 Local : 0xe0430001 3762487297 Detection Time : 440 Diagnostic : - Operating Mode : Asynchronous (Echo off) BFD Name : Network1 Path : Singlehop Parameter : TxInterval RxInterval Multiplier Remote System : 150 200 2 Local System : 160 220 3 Current : 200 220 2 Follower : BGP4 Statistics Packets Counter : Tx Rx Since Last Up : 2194 3291 Since Boot : 2195 3292 Up Count : 1 Last Up Time : 20XX/05/22 15:37:20 UTC Last Down Time : - Diagnostic : - >

Figure 34-6: Result of executing show bfd session command. (Detailed display)

> show bfd session vrf 2 ip 192.168.16.5
Date 20XX/05/22 15:55:33 UTC
Session Index 1
  State : Up 
    Remote System    : 192.168.16.5  VRF:2
    Local System     : 192.168.16.1  VRF:2
    Discriminator    : Hex                     Decimal
      Remote         : 0xbce20002              3168927746
      Local          : 0xe0430001              3762487297
    Detection Time   : 440
    Diagnostic       : -
    Operating Mode   : Asynchronous (Echo off)
  BFD Name : Network1
    Path             : Singlehop
    Parameter        :   TxInterval     RxInterval     Multiplier
    Remote System    :          150            200              2
    Local System     :          160            220              3
    Current          :          200            220              2
  Follower : BGP4
  Statistics
    Packets Counter  :                   Tx                    Rx
      Since Last Up  :                 2194                  3291
      Since Boot     :                 2195                  3292
    Up Count         : 1
    Last Up Time     : 20XX/05/22 15:37:20 UTC
    Last Down Time   : -
      Diagnostic     : -
>

(2) Checking Discarded Packets

Show bfd discard-packets command-displays discarded BFD packets. You can check the source of BFD in Remote Address.

Figure 34-7: Result of executing show bfd discard-packets command
> show bfd discard-packets Date 20XX/07/10 18:37:50 UTC 15 packets discard 10 packets: Unknown Session (Discriminator=0xd1ef0023) Remote Address: 172.16.10.11 VRF:2 1 packet: Authentication Failure Remote Address: 192.168.22.1 Local Address: 192.168.22.4 4 packets: Invalid Desired Min TX Interval (Interval=0) Remote Address: 192.168.22.1 Local Address: 192.168.22.4 >

Figure 34-7: Result of executing show bfd discard-packets command

> show bfd discard-packets
Date 20XX/07/10 18:37:50 UTC
15 packets discard
    10 packets: Unknown Session (Discriminator=0xd1ef0023)
        Remote Address: 172.16.10.11 VRF:2
    1 packet: Authentication Failure
        Remote Address: 192.168.22.1
        Local Address: 192.168.22.4
    4 packets: Invalid Desired Min TX Interval (Interval=0)
        Remote Address: 192.168.22.1
        Local Address: 192.168.22.4
>