if { $host == "swm" } { set ipaddress "10.133.28.231" }
if { $host == "sw1" } { set ipaddress "10.133.26.231" }
if { $host == "sw2" } { set ipaddress "10.133.26.232" }
+if { $host == "sw" } { set ipaddress "10.133.26.231" }
if { $ipaddress == "" } { puts "unknown switch '$host'""; exit 1 }
spawn screen -c . /dev/ttyUSB0