(Optional) Adjusting BFD Parameters

Context

BFD parameters are adjusted on the ingress node of a TE tunnel using either of the following modes:

Adjusting Global BFD Parameters

Adjust global BFD parameters when a large number of RSVP-enabled interfaces of the local node use the same BFD parameters.
Adjusting BFD Parameters on an RSVP Interface

Adjust global BFD parameters on an RSVP interface when certain RSVP-enabled interfaces of the local node need to use BFD parameters different from global BFD parameters.

Perform the following configurations on the two RSVP neighboring nodes with a Layer 2 device exists between them.

Procedure

Adjust global BFD parameters globally.
1. Run system-view
  The system view is displayed.
2. Run mpls
  The MPLS view is displayed.
3. Run mpls rsvp-te bfd all-interfaces { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } ^*
  BFD parameters are set globally.
  Parameters are described as follows:
  - tx-interval indicates the Desired Min Tx Interval (DMTI), that is, the desired minimum interval for the local end sending BFD control packets.
  - rx-interval indicates the Required Min Rx Interval (RMRI), that is, the supported minimum interval for the local end receiving BFD control packets.
  - multiplier indicates the BFD detection multiplier.
  BFD detection parameters that take effect on the local node may be different from the configured parameters:
  - Actual local sending interval = MAX { Locally-configured DMTI, Remotely-configured RMRI }
  - Actual local receiving interval = MAX { Remotely-configured DMTI, Locally-configured RMRI }
  - Actual local detection interval = Actual local receiving interval x Configured remote detection multiplier
Adjust BFD parameters on an RSVP interface.
1. Run system-view
  The system view is displayed.
2. Run interface interface-type interface-number
  The view of the RSVP-TE-enabled interface is displayed.
3. (Optional) On an Ethernet interface, run undo portswitch
  The interface is switched to Layer 3 mode.
  
  By default, an Ethernet interface works in Layer 2 mode.
  
  Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
4. Run mpls rsvp-te bfd { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } ^*
  BFD parameters on the RSVP interface are adjusted.