User's Manual

79-8
Construction method: select one port on member1 and select one port on member2. Connect them with a
line.
Figure 83-8: BFD MAD detection
BFD MAD detection is achieved through BFD protocol. For BFD MAD detection function running normally,
enable BFD MAD detection function under the layer3 interface and configure MAD IP address on this
interface. The difference between MAD IP address and the ordinary IP address is that MAD IP address is
bond to the member device, each member device in VSF should configured it and they must belong to the
same network segment.
When VSF is running normally, only the MAD IP address configured on master is effective, the MAD IP
associated with the slave device is not effective, BFD session is under the status of down.
When the VSF is split into two vsf, the mad ip address associated with the member on the new vsf becomes
effective. Through the connection line of bfd mad detection, the bfd session will be created between the two
vsf to detect the multiple Active conflict.
79.2 Relevant VSF Configuration
79.2.1 VSF Configuration
VSF configuration task list:
1. Configure the number of VSF members (necessary)
2. Configure the priority of VSF members (optional)
3. Configure the VSF domain (optional)
4. Configure the logic VSF port
Configure the logic VSF port
Bind the physical port to the logic port
5. Transform the device from independent operation mode to VSF operation mode
6. Configure the VSF to merge automatically (optional)
7. Describe the VSF members (optional)
8. Configure the down delaying reporting function of the VSF link (optional)
9. Configure the keeping time of MAC address of VSF group after VSF split (optional)
10. Transform the device from VSF operation mode to the independent operation mode
11. Detect the VSF link status’ change quickly