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Knowledge Base

FAQ-Can a BFD Session on an S7700 Be Bound to the Physical Status of an Interface

Publication Date:  2019-05-15  |   Views:  160  |   Downloads:  0  |   Document ID:  EKB1100015260


Issue Description

Can a BFD session on an S7700 be bound to the physical status of an interface?


A BFD session can be bound to the physical status of an interface to monitor the interface status. The command is as follows:
bfd bfd1 bind peer-ip default-ip interface GigabitEthernet0/0/1 // Create a BFD session to be bound to GigabitEthernet0/0/1.
process-interface-status //Associate the BFD session with the interface. By default, a BFD session is not associated with an interface. That is, the status change of the BFD session does not change the interface status in the interface management module.

BFD must be enabled globally before running the bfd bind peer-ip default-ip command.
Application scenario`:
When a transmission device is deployed along the direct link, BFD can detect the link fault faster than the link protocol fault detection mechanism of an interface.
Therefore, to notify an application of the BFD detection result more quickly, the system adds the status of the BFD session bound to an interface to the interface in the interface management module of the device. The system detects the interface status based on the link status, protocol status, and BFD status of the interface and notifies the application of the detection result.