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member ID of the switch. 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. The physical ports assigned to an IRF

port automatically form an aggregate IRF link. An IRF port goes down only if all its physical IRF 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.

Physical IRF port

Physical IRF ports connect IRF member devices and must be bound to an IRF port. They forward IRF

protocol packets between IRF member devices and data packets that must travel across IRF member

devices.

For more information about physical ports that can be used for IRF links, see

configuration

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

2. The fabrics have LACP MAD detection links between them. When a member switch in one IRF fabric

receives an extended LACP packet for MAD detection, 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 switch can handle

the packet correctly.

guidelines."

Figure

2, Switch A and Switch B form IRF fabric 1, and Switch C and Switch D form IRF fabric

"General restrictions and