To set an ip on the managment interface:

conf t

boot

ip address x.x.x.x

subnet mask x.x.x.x

The port on your switch should be set to half-duplex 10Mb.

To access this ip you need to be in the same subnet.

If you need to access it from a remote location, you can add a static route [no default route].

exit the boot mode and type

ip management route ....

Gilles.