Bfd Mad - HP 12500 SERIES Configuration Manual

Figure 7 LACP MAD application scenario

BFD MAD

BFD MAD can work with or without intermediate devices.
application 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 purpose.
Assign the ports connected by BFD MAD links to the same VLAN, create a VLAN interface for
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the VLAN, and assign a MAD IP address to each member on the VLAN interface.
The MAD addresses identify the member devices and must belong to the same subnet.
With BFD MAD, the master tries to establish BFD sessions with the 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, and 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,
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and the two masters can establish a BFD session. If you use the display bfd session command,
the state of the BFD session between the two devices is Up.
Figure 8
10
shows a typical BFD MAD