HPE FlexFabric 5700 Series Configuration Manual page 15

Figure 8 shows a typical ARP MAD scenario that uses an intermediate device.
Each IRF member compares the domain ID and the active ID in incoming extended ARP packets
with its domain ID and active ID.
•
If the domain IDs are different, the extended 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.

Figure 8 ARP MAD scenario
Master
ND MAD
ND MAD detects multi-active collisions by using NS packets to transmit the IRF domain ID and the
active ID.
You can set up ND MAD links between neighbor IRF member devices or between each IRF member
device and an intermediate device (see
run the spanning tree protocol between the IRF fabric and the intermediate device.
Each IRF member device compares the domain ID and the active ID in incoming NS packets with its
domain ID and active ID.
•
If the domain IDs are different, the NS 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.

Customer
premise
network
Device
feature if the IRF fabric uses
IRF
fabric
IRF link
Internet
Common traffic path
Extended ARP traffic path
Figure
STP domain (all devices
must run the spanning tree
common Ethernet ports for
ARP MAD links)
Subordinate
9). If an intermediate device is used, you must also
11