Forum Thread

Help! Is my NIC dead?

31,493 1,933 June 2, 2018 at 07:33 AM
Hi everyone,

I just had Xfinity internet installed. For right now I'm connected directly to the modem, Dlink DCM-301.

When I connect via my laptop, I'm good (how I'm posting this). I also have an old W7 Dell Zino that I use as an HTPC. It's been in storage for the last few months, but booted right up. However, when I try to connect to the internet, I get "unidentified network. no internet connection."

I've tried different ethernet cables. I've tried with and without the attenuator Comcast supplied. I've reset the network adapter and did a WinSock refresh as well.

Are there any other possibilities other than the NIC died in storage?

Thanks!

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#2
cable modems often latch on to the MAC address of the device attached and require a reboot if that device changes. Connecting a router seems like a better choice to me.

Start with the most basic things like a different cable and checking the link light, then check your network settings. You should make sure it's set to obtain an ip address automatically (using dhcp).
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#3
Quote from jkee
:
cable modems often latch on to the MAC address of the device attached and require a reboot if that device changes. Connecting a router seems like a better choice to me.

Start with the most basic things like a different cable and checking the link light, then check your network settings. You should make sure it's set to obtain an ip address automatically (using dhcp).
Thanks. I did that (reboot, switch cables, set to auto-obtain). I'll try it with a router. Unfortunately, I won't be able to get one until next week.
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#4
Quote from bonkman
:
Hi everyone,

I just had Xfinity internet installed. For right now I'm connected directly to the modem, Dlink DCM-301.

When I connect via my laptop, I'm good (how I'm posting this). I also have an old W7 Dell Zino that I use as an HTPC. It's been in storage for the last few months, but booted right up. However, when I try to connect to the internet, I get "unidentified network. no internet connection."

I've tried different ethernet cables. I've tried with and without the attenuator Comcast supplied. I've reset the network adapter and did a WinSock refresh as well.

Are there any other possibilities other than the NIC died in storage?

Thanks!
I don't know about the dlink modem but my modem on xfinity (a motorola something or other) has a diagnostic interface at 192.168.100.1
You could try manually setting your NIC to 192.168.100.2 and seeing if you can reach that page. If you can, I'd say it's Windows acting the clown and your NIC is good.

Alternatively, you could try booting of a live linux image and running:
# ip addr
This will show you whether you got an IP or not
If not:
# grep -i dhcp /var/log/messages
and you should get more info
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#5
Quote from bonkman
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Thanks. I did that (reboot, switch cables, set to auto-obtain). I'll try it with a router. Unfortunately, I won't be able to get one until next week.
Link lights are the first thing you should check (sounds like you still haven't). They provide the most basic check on layer 1 (physical) and 2 (link) of the OSI model.
Surely you have some other devices you could experiment with too.

USB Ethernet adapters are cheap.
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Last edited by jkee June 2, 2018 at 08:21 PM.
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#6
Quote from jkee
:
Link lights are the first thing you should check (sounds like you still haven't). They provide the most basic check on layer 1 (physical) and 2 (link) of the OSI model.
Surely you have some other devices you could experiment with too.

USB Ethernet adapters are cheap.
So apparently when I rebooted I didn't wait long enough for the MAC address to clear. I shut everything down over night and it worked this morning. Thanks!
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