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I have a plain DHCP wired connection at home, and a wired connection secured with 802.1X at the office. I need to use the right parameters in each location.

I've configured both connections with NetworkManager, but now when I'm at home the NM GUI asks me to re-enter identity data, it doesn't try to establish an unsecured connection.

How can I configure the NetworkManager to use the right connection in both locations? Are there any attributes for wired networks, like, a MAC of the DHCP server, or the availability of the authentication server? I can also use another utility instead of NM if it's easier.

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How is it supposed to figure out which is the correct one? –  Ignacio Vazquez-Abrams Jul 17 '13 at 4:16
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It's easy for it to figure out wireless since different networks have different ESSIDs. With ethernet it's just "cable plugged in". –  jordanm Jul 17 '13 at 4:42
    
What do you mean by “secured”? NM usually works out of the box where DHCP is available. Is there a DHCP server at your office? If not, what kind of setup is it: a static IPv4 address? Is it in a public range or private range? –  Gilles Jul 17 '13 at 23:28
    
@Gilles : "Secured" means an authentication via the 802.1x protocol family - by certificate. –  abyss.7 Jul 18 '13 at 4:28
    
@jordanm : That's the part of the question - are there any attributes for wired networks? - Like, a MAC of the DHCP server, or an availability of the authentication server. For now the NM GUI only asks to re-enter identity data, if it fails to establish secured connection - it doesn't try any other connection. –  abyss.7 Jul 18 '13 at 4:36
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