Figure 6 – H3C Technologies H3C SecPath F5020 User Manual
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Figure 6 BFD MAD scenario
To use BFD MAD:
•
Set up dedicated BFD MAD link between each pair of IRF members or between each IRF member
and the intermediate device. Do not use the BFD MAD links for any other purposes.
•
Create a Layer 3 aggregate interface for BFD MAD, and assign a MAD IP address to each member
on the aggregate interface.
NOTE:
The MAD addresses identify the member devices and must belong to the same subnet.
•
Assign the ports connected by BFD MAD links to the Layer 3 aggregation group.
With BFD MAD, the master tries to establish BFD sessions with other member devices by using its MAD
IP address as the source IP address.
•
If the IRF fabric is integrated, only the MAD IP address of the master is effective. The master cannot
establish a BFD session with any other member. If you execute the display bfd session command,
the state of the BFD sessions is Down.
•
When the IRF fabric splits, the IP addresses of the masters in the split IRF fabrics take effect. The
masters can establish a BFD session. If you execute the display bfd session command, the state of
the BFD session between the two devices is Up.
For more information about BFD, see High Availability Configuration Guide.