R3303-HP HSR6800 Routers IRF Configuration Guide

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• When the IRF fabric splits, the IP addresses of the masters in the split IRF fabrics take effect, 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 7 BFD MAD application scenario
ARP MAD
ARP MAD detects multi-active collisions by using extended gratuitous ARP packets that convey the IRF
domain ID and the active ID.
You can set up ARP MAD links between neighbor IRF member devices, or more commonly, between
each IRF member device and an intermediate device (see Figure 8)
. If an intermediate device is used,
you must also run the spanning tree feature between the IRF fabric and the intermediate device.
Device
Master
Subordinate
IRF
Internet
Customer
premises
network
IRF link
Link aggregation
BFD MAD link
VLAN 2
192.168.1.2/24
VLAN 2
192.168.1.3/24