On Mon, 31 Mar 2014 01:31:54 -0400 (EDT), Robert Holtzman wrote: > > I seem to remember this happening after an update but I'm not positive. > It did work before. My wireless connection continues to work. > > Looked at the usual suspects, /etc/network/interfaces, /etc/resolv.conf, > etc., but everything looked the same as before as close as I remember. > > Searching on the subject line turns up a lot of hits but nothing I tried > produced a connection. > > Didn't see anything applicable in dmesg but I may have missed it. > > ifup eth0 gives "Ignoring unknown interface eth0=eth0 > > Running Debian 7.4 on a Lenovo t420 w/ 4G RAM and an Intel i3. > > Being pretty ignorant about networking, I'm at a loss as to where to > begin trouble shooting. Any pointers appreciated. Did you do anything that might have changed a MAC address? Like changing PC card Ethernet adapters, for example? Or replacing a motherboard that has a built-in Ethernet adapter? The correspondence between MAC addresses and interface names is controlled by /etc/udev/rules.d/70-persistent-net.rules. You may need to edit this file and change MAC addresses.
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