Hello, Why not boot your workstation unplugged while you're in Network 1. Your workstation won't find any DHCP server and will use alternate configuration. Afer that, connect the workstation to the network, it may keep the alternate configuration. If this is not convenient, you could use a script allowing you to change your IP configuration, see below: REM Script Beginning @echo off set carte="LAN" REM Change the following infos with your static ip addressing plan set adrfixe=192.168.0.143 set masque=255.255.255.0 set passerelle=192.168.0.1 set adrDNS1=192.168.0.2 set adrDNS2=192.168.0.49 set adrWINS=192.168.0.49 SET /P lan=Use DHCP (Y/N)? : if %lan%==y goto IPDHCP if %lan%==Y goto IPDHCP goto IPDHCP :IPfixe netsh interface ip set address %carte% static %adrfixe% %masque% %passerelle% 1 netsh interface ip set dns %carte% static %adrDNS1% netsh interface ip add dns %carte% %adrDNS2% netsh interface ip set wins %carte% static %adrWINS% goto fin :IPDHCP netsh interface ip set address %carte% dhcp netsh interface ip set dns %carte% dhcp netsh interface ip set wins %carte% dhcp :fin REM End of script I hope this help!! Xavier