Bfd Mad - H3C S5830V2 Configuration Manual

Figure 5 LACP MAD application scenario
Master

BFD MAD

BFD MAD can work with or without intermediate devices.
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 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 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.
Customer
premise
network
Device
LACP-enabled dynamic
link aggregation
IRF
IRF link
Internet
Common traffic path
LACP MAD traffic path
LACP-enabled dynamic
link aggregation
Subordinate
Figure 6 shows a typical BFD MAD application
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