I219-LM Can't Open a DHCP Connection

Issues related to configuring your network
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CaveDann
Posts: 27
Joined: 2018/12/14 15:05:27
Location: U.K.

I219-LM Can't Open a DHCP Connection

Post by CaveDann » 2019/07/16 11:39:07

Hello,

We have a DHCP server with the MAC address for the machine correctly allocated. We know it's not a DHCP issue since all the other machines, including another CentOS 7 machine, are interfacing with the network correctly.

I'm looking for solutions assuming that the machine or network card are at fault.

The machine in question has a I219-LM (5) card in it.
" lspci -nn | grep -i net " returns a number of [8086:15e3].

The machine itself can see that em1 exists, with the correct MAC address, so the e1000e driver must be loaded correctly and so must also support the NIC.

Is there anything else anyone can think of that may be preventing the machine from connecting to the network, based on the machines configuration?

Cheers,
CD

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TrevorH
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Location: Brighton, UK

Re: I219-LM Can't Open a DHCP Connection

Post by TrevorH » 2019/07/16 12:09:51

Time to break out wireshark or tcpdump and watch the traffic as it arrives (or doesn't).

I'd check cables first, then different switch ports.

Post your ifcfg-em1 file.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

CaveDann
Posts: 27
Joined: 2018/12/14 15:05:27
Location: U.K.

Re: I219-LM Can't Open a DHCP Connection

Post by CaveDann » 2019/07/17 07:42:50

Hey Trevor,

Thanks for the response. I think we can close this one down though.

I'd been assured that all the DHCP configuration was correct when infact it was not.

Simplest solution is often the correct one.

Cheers,
CD

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