Irf Domain Id - HP 12500 SERIES Configuration Manual

In IRF mode, the IRF ports are named IRF-port n/1 and IRF-port n/2, where n is the member ID of
the device. The two IRF ports are referred to as "IRF-port 1" and "IRF-port 2" in this book for
simplicity.
To use an IRF port, you must bind at least one physical port to it. These ports are called "IRF
physical ports."
The physical ports assigned to an IRF port automatically form an aggregate IRF link. An IRF port
goes down only if all its member physical ports are down.
For two neighboring devices, their IRF physical links must be bound to IRF-port 1 on one device
and to IRF-port 2 on the other.

IRF domain ID

One IRF fabric forms one IRF domain. IRF uses IRF domain IDs to uniquely identify IRF fabrics and
prevent IRF fabrics from interfering with one another.
As shown in Figure 4, Device A and Device B form IRF fabric 1, and Device C and Device D form IRF
fabric 2. Both fabrics use the LACP aggregate links between them for MAD. When a member device
in one IRF fabric receives an extended LACP packet for MAD, it looks at the domain ID in the packet
to see whether the packet is from the local IRF fabric or from a different IRF fabric. Then, the device
can handle the packet correctly.
Figure 4 A network that comprises two IRF domains
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