Hi, In 3com4200.cs.stevens.edu the interfaces are named as RMON Port 01 on unit 1 1 )Should i assume the user will give the arguments as ./bwinfo -i 'RMON Port -1 on unit 1' 3com4200.cs.stevens.edu 2) what if user gives an interface name which is not correct ? Regards ~Ujwal Trivedi