A method and apparatus for improving performance of a loop network, in
particular a Fiber Channel Arbitrated Loop. The loop network has two
loops and a plurality of dual-ported devices each with one port on each
loop. The method includes selectively bypassing redundant ports on the
loops by a first command means in the form of a Fiber Channel Arbitrated
Loop command to balance port accesses and to reduce the loop overhead by
reducing the number of ports in each loop. In the event of a fault,
bypassing the port of a device by a second command means in the form of a
non Fiber Channel Arbitrated Loop command and enabling all the bypassed
redundant ports with a single command to all ports using the first
command means. The first command means does not enable the port bypassed
by the second command means.