No network connection

Kernels & Hardware, configuring network, installing services

No network connection

Postby pythagorasmk » 2020-09-28 15:07

I have only one ethernet card and the card was working perfectly until last night. My ISP had difficulties so I used usb tethering on my phone to get to the internet. When I was connecting to the internet there were two wired connections, which is perfectly OK. Today when I turn on my machine there were no connections in networks under KDE. ifconfig gives this:
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enp7s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 50:e5:49:50:58:bf  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 2  dropped 0  overruns 0  frame 2
        TX packets 19  bytes 5431 (5.3 KiB)
        TX errors 2  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 3527  bytes 288052 (281.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3527  bytes 288052 (281.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I cannot connect to any network. Please help.
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Re: No network connection

Postby Head_on_a_Stick » 2020-09-28 15:53

So you appear to have an ethernet interface (enp7s0) and it's up.

Can you assign some addresses:
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# dhclient enp7s0

Can we eliminate hardware failure? Live ISO images are good for checking that. I think a broken cable and/or connector is a possibility here.
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Re: No network connection

Postby pythagorasmk » 2020-09-28 16:30

Head_on_a_Stick wrote:Can we eliminate hardware failure? Live ISO images are good for checking that. I think a broken cable and/or connector is a possibility here.

I have rebooted from Windows (I had to start windows to write the previous message) and everything is working perfectly OK. Probably, the problems with the ISP have caused this problems. The only difference in ifconfig report is the line:
Code: Select all
enp7s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

which now states that enp7s0 is now RUNNING, previously there was no such claim. I don't know what was the problem, but for now it seems resolved.
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Joined: 2015-01-18 03:40


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