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Hi.. How about "ip route" you can set gateway metric. I used to set up this option when I had NAT, I had two ADSL line so If one line isn't work, gateway and routeing table disappeard automatically. So I can use next line without disconnecting -----Original Message----- From: list-bounces@xxxxxxxxxxxxx [mailto:list-bounces@xxxxxxxxxxxxx]On Behalf Of Simon Williams Sent: Tuesday, June 20, 2006 8:57 PM To: list@xxxxxxxxxxxxx Subject: [LUG] Detect if ethernet device is plugged in, multiple redudant routing I have a laptop. It has ethernet and wireless. It also has a pcmcia ethernet card, irda, usb and serial network connections, but those should be ignored for this. When the ethernet is plugged in, it should use that. If it isn't then it should try the wireless. The problem is that if both devices are up, the one which was activated first always gets all the traffic, even if it's not actually got a connection (no ethernet cable, or wireless out of range). Since the ethernet card is always activated first on boot, I have so far been manually taking it up and down when connecting and disconnecting the lan cable. I'm sure Linux can do better than this, so... Does anyone know if there is some program, ifconfig option, driver extension or file in /sys or /proc that will tell me whether or not an ethernet device is plugged in to something? I've googled and looked around my system, but I can't find anything. Alternatively, how do I say- when sending a packet go through the routing table like normal, but if the first route you find doesn't work then try the next one. Then remember that and try the first route only every 10 seconds or so until it works again (so that it doesn't try the first one for every single packet). Thanks in advance Simon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html