The bfd all-interfaces command sets the parameter values of a BFD session.
The undo bfd all-interfaces command restores the default parameter values of a BFD session.
By default, BFD is not enabled for OSPFv3.
| Parameter | Description | Value |
|---|---|---|
| min-transmit-interval Tx-Value |
Specifies the minimum interval at which BFD packets are sent to the remote end. |
The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10. |
| min-receive-interval Rx-Value |
Specifies the minimum interval at which BFD packets are received from the remote end. |
The value is an integer ranging from 3 to 20000, in milliseconds. The default value is 10. |
| detect-multiplier Mul-Value |
Specifies the local detection multiplier. |
The value is an integer ranging from 3 to 50. The default value is 3. |
| frr-binding |
Associates the BFD session status with the link status on an interface. If BFD detects a link fault on an interface, the BFD session goes Down, triggering FRR. Traffic is then quickly switched to the backup link, minimizing service loss. |
- |
Usage Scenario
Rx-Value is a value negotiated based on min-rx-interval set on the local end and min-tx-interval set on the remote end. In addition, the smaller value between min-rx-interval set on the local end and min-tx-interval set on the remote end is used as min-tx-interval of the remote end. If the local end does not receive any BFD packets within the interval of Rx-Value × Mul-Value(local detection multiplier), it declares the remote end Down.
Precautions
After BFD is enabled, OSPFv3 establishes BFD sessions only with the neighbors in the Full state.
The preference of BFD configured on an interface is higher than that configured in the process. The bfd all-interfaces (OSPFv3) command and the ospfv3 bfd block command are mutually exclusive.