Urgent: Network died after upgrade

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http://forums.fedoraforum.org – I upgraded my Fedora 16 x86_64 laptop via DVD to Fedora 17. All went without error messages. When I rebooted everything came up fine except networking is dead, both wlan0 and eth0. I have spent hours trying to get them working again, to no avail. I found a few possible solutions, but they all involve installing or reinstalling packages. I have no network. I have a working desktop computer with a net connection so I could sneakernet a package, but otherwise I cannot install things. I also made a full system backup before the upgrade. Of course, the files are all from Fedora 16. The strange p (HowTos)