Enabling BFD

Context

To implement protection switching within 50 ms, set the minimum interval at which BFD packets are sent and received to 3.3 ms. The restraints on switches are as follows:

For the S12700, the MPU must be an ET1D2MPUA000/ET1D2MPUDC00 card.
For the S12700E, the MPU must be an LST7MPUE0000 card.
For the S9700, the MPU must be an EH1D2SRUDC00/EH1D2SRUDC01 card.
For the S7700, the MPU must have an ES0D00FSUA00 card installed or be an EH1D2SRUDC00/EH1D2SRUDC01 card.
For the S7706/S7706 PoE or S7712, the assign system-resource-mode static command must be run to set the resource allocation mode to static so that the BFD detection duration can be controlled within 50 ms.
For the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, and S6720-HI, the set service-mode command must be run to configure the switch to work in enhanced mode.
For the S5732-H, S6730-H, S6730S-H, S6730-S, and S6730S-S, the set service-mode command must be run to configure the switch to work in enhanced—bfd mode.

Procedure

Configure SPEs.
The following uses the configuration of Core_SPE1 on the core ring as an example. The configurations of Core_SPE2 and Core_SPE3 are similar to the configuration of Core_SPE1, and are not mentioned here.
```
#
bfd
#
```
Configure UPEs.
The following uses the configuration of Site1_UPE1 as an example. The configurations of Site1_UPE2, Site2_UPE3, Site2_UPE4, Site3_UPE5, and Site3_UPE6 are similar to the configuration of Site1_UPE1, and are not mentioned here.
```
#
bfd
#
```