R3303-HP HSR6800 Routers IRF Configuration Guide

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Figure 8 ARP MAD application scenario
Each IRF member compares the domain ID and the active ID in incoming extended gratuitous ARP
packets with its domain ID and active ID:
• If the domain IDs are different, the extended gratuitous ARP packet is from a different IRF fabric. The
device does not continue to process the packet with the MAD mechanism.
• If the domain IDs are the same, the device compares the active IDs:
{ If the active IDs are different, the IRF fabric has split.
{ If the active IDs are the same, the IRF fabric is integrated.
Device
Master
Subordinate
IRF
Internet
Customer
premises
network
IRF link
Common traffic path
Extended gratuitous ARP traffic path
STP Domain
To avoid loops, all devices
in the domain must run the
spanning tree feature.