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My ethernet connection is no longer working. When I check ifconfig, the information is wrong.

dustin@dustin:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr dc:0e:a1:3b:7c:f0  
          inet6 addr: fe80::de0e:a1ff:fe3b:7cf0/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:6954 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1778 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2316328 (2.3 MB)  TX bytes:284974 (284.9 KB)

That hardware address is not the MAC address of the connected modem. Why won't ubuntu recognize the wire connection and why is a wrong MAC address present?

I am using the Motorola SB6141, and when I connect it to a Windows computer, the connection works. So issue is Ubuntu specific.

Edit 1:

I am at my school office and my ethernet doesn't work here now either. Is there anyway I get the ethernet connection to work? I can provide any information need to solve this problem.

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That command doesn't give you the MAC address of your modem, only an attached Network Interface Card (NIC). Can you give us specifics about how your connection is not working please? –  RGS Jun 1 '13 at 19:32
@RGS the wired connection only works when hooked up to a Windows computer but not my laptop on Ubuntu. –  dustin Jun 1 '13 at 21:05
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