Hewlett-Packard's implementation of FC-AL for a private loop includes a hub. FC-AL hubs connect devices to the loop. It is a simple way to connect participants in a private loop. There are two types of hubs:
Some hubs can sense or manage configuration changes in the loop, including:
Hubs also provide port bypass circuits to "heal" a loop when a device is removed or fails This allows for less disruption in operations. Hubs help solve the problems of cabling devices and keeping track of which loop a device is on. With central cabling by way of the FC-AL hub, it is easy to add and remove devices from arbitrated loops .
There are some definite advantages to using Fibre Channel hub: