this post was submitted on 07 Oct 2024
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I'm having trouble getting an IP address via DHCP on my HP ProLiant DL380 Gen9 server running Debian. I've tried various troubleshooting steps, but nothing seems to work.

Error messages:

  • "No DHCPOFFERS received"
  • "No working leases in persistent database - sleeping"
  • "Activation of network connection failed" (GNOME)
  • "IP configuration unavailable" (Plasma)

Hardware:

  • HP ProLiant DL380 Gen9 server

Software:

  • Debian operating system
  • GNOME and Plasma desktop environments

Troubleshooting steps:

  • Checked network cable and ensured it's properly connected
  • Restarted network service
  • Set /etc/NetworkManager/NetworkManager.conf managed=true

Additional information:

  • Internet worked during the Debian installation process, but not after booting into the installed system.
  • The problem occurs on both GNOME and Plasma desktop environments, but Plasma provides a slightly more helpful error message.

I'd appreciate any help or guidance on resolving this issue. Has anyone else experienced similar problems with DHCP on a HP ProLiant DL380 Gen9 server with Debian?

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[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

You need an IP that is in the same subnet as the rest of the network. Take your gateway IP and then find the subnet mask. (It is probably a /24 which is 255.255.255.0)

Next pick a random ending number (x.x.x.67 for example). Try to ping it from a different device to make sure that it isn't in use. Once you do that you can set it on the server. Go to network and then set it to manual. Set the IP, subnet mask and gateway IP. Then try to ping the gateway. If that fails you have a layer 1 problem (hardware)

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

I set the manual ipv4 to 192.168.0.72, and it says it's connected - it doesn't have any 'activation of network connection failed' error messages, but it doesn't seem to actually have any internet either

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

That's good. What's your routers IP address?

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

62.49.7.152 is my public IP, if that's what you mean. How do I use that information, other than allowing others to know my approximate location?

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

I'm looking for the private IP. (The one your router has on the inside network)

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

How do I find that? Is it written on the router somewhere, or is there a command to run to find it?

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

How did you set it up? Did you just plug it in and forget about it?

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

I didn't set it up; another member of my household did

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

Oh

Is your phone connected to WiFi? What do the network settings show on your phone?

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

Did you want a specific part of network settings, or is this helpful?

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (2 children)

Set your gateway to 192.168.1.1. Can you then ping 1.1.1.1?

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

I tried changing the IP in manual settings, I'm not sure how I ping an IP, I assume it's a command that I don't know, but as the screenshots show, accessing a website didn't work. I saw an IP in the startup menu and tried that but it didn't seem to work

[–] possiblylinux127@lemmy.zip 2 points 2 months ago (1 children)

Your netmask should be 255.255.255.0

[–] JackGreenEarth@lemm.ee 1 points 2 months ago (1 children)

Why is that? I applied the change, and restarted the Ethernet connection, but I still don't have internet

[–] possiblylinux127@lemmy.zip 2 points 2 months ago* (last edited 2 months ago) (2 children)

You have a upstream issue then. I would start by checking the physical port and then work your way up until you find the fault.

It is also possible you have a bad network card as this is older hardware

[–] JackGreenEarth@lemm.ee 1 points 2 months ago

I tried what I said, reinstalling to see if it still had internet. It did not. Therefore I went into a rabbithole of trying to rule out specific things of why it was working then but not now, and I still have no idea why it was working then, but I have plugged the Ethernet powerline into a new, more inconvenient, plug socket, and the wired internet is mostly working! I can still access most sites, but Firefox won't connect to addons.mozilla.com or accounts.firefox.com. Idk if that's a Firefox issues or a network issue, but it's mostly working now, which is great!

[–] JackGreenEarth@lemm.ee 1 points 2 months ago

Hmm. One way to check multiple options at once is to try the install again and see it internet is still present when installing the OS, as it was before. If it is, that would rule out a hardware issue.

[–] JackGreenEarth@lemm.ee 1 points 2 months ago

Here are the network settings