[FIXED] Proxmox Not Working After Instalation - Network issues

filsantos

New Member
Jul 27, 2023
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Hi Guys,

First of all I´d like to appologize for my lack of information/knowledge. I tried to search in a few forums, google, etc, without success.
I am able to install proxmox but I am doing somthing wring in the /etc/network/interfaces file

I´m trying to setup proxmox in a old latop (I am able to run debian with gui with success) so it is not a hardware issue

Not sure if it is something that affects but my network is a CGNAT

I installed the proxmox with the following details in the Management Network

Interface: enp2s0f5 (I´m using the ethernet with cable because it will be easier) I tried the wifi also with no success, the cable is working because I did a test in another machine.
Hostname: pve.home
Ip address: 192.168.0.150 (I select a high number to be sure it is not reserved but I check in my networking monitoring tool and I have only around 10 devices)
Gateway: 192.168.0.1 (I check according to a few connected devices)
DNS Server: 1.1.1.1 (I also checked from a few connected devices)

After instalation, with success, I see that I´m not able to accesss from another computer the address: https://192.168.0.150:8006
I check and this ip still availble with the network monitoring tool

I tried hundred of times(for sure) edditing /etc/network/interfaces file with hotplug, dhcp, etc, etc without success... so I´m going to attach the file as I have after ths instalattion

I tried also ifup, systemctl networking restart, etc ,etc but I think I am missing something.

I´m going to update a few screenshots and I appreciate any help/guidance
 

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Your "ip addr" shows "NO-CARRIER", so there is a physical problem with your connection. Make sure the cable is plugged in or try another cable or other port on your switch/router. NEtwork config looks fine in case 192.168.0.1 is really your routers IP.
Wifi should be avoided, see here: https://pve.proxmox.com/wiki/WLAN
 
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Thanks my friend this is really a good light. Do you think it might be because of this computer netwokr drivers? anyhow to see f they are properly installed? I´m algo going to try debian GUI to be sure this ethernet is working as well as the wifi
 
I´m feeling like "rabbit hole" lol. In order to fix my issue I need to try kernel 5.15.... Then I start another research: how to use proxmox 5.15 kernel?lol At least I see that the options that you guys are providing me make a lot of sense... Right now I´m trying old versions of proxmox to find the right kernel.... but is that a way to use proxmox 8 with kernel 5.15? tks a lot
 
Did you look at the link which decribed how to switch kernels?
when I run apt-cache search pve-kernel I just see the last two availble... so I dowlnoad proxmox 4 and I´ll try to make it run....


I saw some explanations but it need internet connection in order to make it work

(again thanks a lot for your time and pacience)
 
As described in the link you can run proxmox-boot-tool kernel list to get a list of all kernels that are already installed on your system.
With the latest PVE 8.0.3 you should have kernels "5.15.108-1-pve" and "6.2.16-4-pve" available with "6.2.16-4-pve" as the default.
So to test the old kernel (the one that was the default with PVE 7.4) once you can run proxmox-boot-tool kernel pin 5.15.108-1-pve --next-boot and do a reboot to see if that fixes the problem.
 
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As described in the link you can run proxmox-boot-tool kernel list to get a list of all kernels that are already installed on your system.
With the latest PVE 8.0.3 you should have kernels "5.15.108-1-pve" and "6.2.16-4-pve" available with "6.2.16-4-pve" as the default.
So to test the old kernel (the one that was the default with PVE 7.4) once you can run proxmox-boot-tool kernel pin 5.15.108-1-pve --next-boot and do a reboot to see if that fixes the problem.
Am I doing it wrongly?

attch files
 
Then it looks like you really only got that single kernel, which is strange, as PVE always keeps some older kernels, even if you run a apt autoremove.
 
@Dunuin I was able to get a BROADCAST message in the enp2s0f5 with the proxmox 5.4
I think it is a great progress..
I just check also I was able to make the proxmox run with no changes in the interfaces file....

Now I´ll do some research in how to keep this kernel and upgrade the rest
 

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Guys, I will update as soon as I get more details but I was able to fix my issue using the following:
1) According to our friend @Dunuin my network was showing as NO-CARRIER so in order to fix that I tried to make all the combinations possible to the interfaces file and again according to Duniun I need to use a OLD proxmox 5.4. After that I only flash the proxomox 8 to the pendrive and I install this new version... and then it worked....
I tried a few times... formatting and install only proxmox 8 and it wont work
format and install to 5.4 then after that install 8... it work...

Again I dont know the reason but It worked. I hope it can help more people
 
Add another data point here.
I had the same issue with intel NIC and did not find the kernel 5.15 in proxmox 8.
It works for me after installing proxmox 7.4(kernel 5.15) instead of 8.0(kernel 6.2).
 

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