Intel 100BASE-TX manual Unit Numbering Convention, C H A P T E R

C H A P T E R 3 Intel Express 100BASE- TX Stackable Hub

Unit Numbering Convention

This section provides information about the hub unit numbering convention. The unit numbering convention is invoked when an NMM is installed in one of the Express hubs in a stack.

When Express hubs are stacked, cascaded, and powered, they are assigned “unit” numbers that are stored in nonvolatile memory on the hub motherboard. The NMM assigns units numbers from the top down—the hub at the top of the stack is assigned unit 1, the hub below unit 1 is assigned unit 2, and so on. Unit numbers are assigned according to the physical location of the hub in the stack.

In a fully equipped stack, hubs are assigned unit numbers 1 through 6.

You can identify the unit numbers of the hubs in the stack through your network management software.

As you build your stack to include more hubs, each hub that is added to the stack is assigned a unit number that relates to the position of the unit in the stack. For example, if you have four hubs in your stack and you add a hub to the bottom of the stack, the new unit is assigned unit 5. If you install your new hub at the top of the stack, the new hub is assigned unit 1 and the hubs below the new hub are reset and renumbered in sequence.

28