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Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

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Disabling and Re-Enabling BFD

BFD is enabled on all interfaces by default, though sessions are not created unless explicitly configured.

If you disable BFD, all of the sessions on that interface are placed in an Administratively Down state ( the first message example), and the remote systems are notified of the session state change (the second message example).

To disable and re-enable BFD on an interface, use the following commands.

  • Disable BFD on an interface.
    INTERFACE mode
    no bfd enable
  • Enable BFD on an interface.
    INTERFACE mode
    bfd enable
If you disable BFD on a local interface, this message displays:
     R1(conf-if-te-4/24)#01:00:52: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session state to Ad
Dn for neighbor 2.2.2.2 on interface Te 4/24 (diag: 0)
If the remote system state changes due to the local state administration being down, this message displays:
     R2>01:32:53: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session state to Down for neighbor
2.2.2.1 on interface Te 2/1 (diag: 7)

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