Fix R8168/R8169 ethernet issues on Proxmox 8.0

gistfile1.txt

Fix N95 Ethernet issues on Proxmox 8.0

Step 1 - Edit  /etc/apt/sources.list 

    - Add "non-free" at the end to the first two lines
    - Add proxmox repository:
        deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

Step 2 - Apt update

    apt update

Step 3 - Install pve-headers

    apt install pve-headers

Step 4 - Install r8168-dkms

    apt install r8168-dkms

Step 5 - Update kernel boot command to disable some options in r8168 driver:

    - Edit /etc/default/grub
        - Add : "r8168.aspm=0 r8168.eee_enable=0 pcie_aspm=off loglevel=3" to the end of GRUB_CMDLINE_LINUX_DEFAULT entry
    - Then update your grub
        update-grub
    - Reboot

Step 6 - Once rebooted, edit /etc/network/interfaces and set the correct inteface in the bridge option