Stopping and starting wireless Network

Haia I'm connected via a wireless network to my ISP. (SuSE 8.2) At times the network stops working because of weather conditions. (rain). Sometimes the connection ( to the network) comes back on, but sometimes it doesn't. Not to much of a problem because restarting will fix it. My question is, is there another way (command line) to stop and (re)start a network then restarting? Thanks for your input. -- Greetings from /bill at 169 west , 19 south. Disclaimer: Any errors in spelling, tact, or fact are transmission errors."