No network (vmbr0) on a fresh install of PVE8.1

[agi]

Installed a new copy of PVE 8.1. The network card is an external USB, which is recognized during installation.
However, when the server boots up, no network connection exists.

Only systemctl restart networking works and brings the network up (however, putting this in cron task after reboot doesn't help):

IP ad is:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: enx00e04c681656: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:e0:4c:68:16:56 brd ff:ff:ff:ff:ff:ff

After performing systemctl restart networking the network starts to work normally, and IP ad is now:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: enx00e04c681656: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
    link/ether 00:e0:4c:68:16:56 brd ff:ff:ff:ff:ff:ff
3: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:e0:4c:68:16:56 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.200/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::2e0:4cff:fe68:1656/64 scope link
       valid_lft forever preferred_lft forever

I thought maybe the USB NIC was identified too late; I tried to change some order in the UDEV / boot sequence to no avail.
re-installed to the same result.
installed microcode, no help.


system status networking before restore is:

○ networking.service - Network initialization
     Loaded: loaded (/lib/systemd/system/networking.service; enabled; preset: enabled)
     Active: inactive (dead)
       Docs: man:interfaces(5)
             man:ifup(8)
             man:ifdown(8)

Nov 10 02:27:42 pve systemd[1]: Dependency failed for networking.service - Network initialization.
Nov 10 02:27:42 pve systemd[1]: networking.service: Job networking.service/start failed with result 'dependency'.

the interfaces config is vanilla:

auto lo
iface lo inet loopback

iface enx00e04c681656 inet manual

auto vmbr0
iface vmbr0 inet static
    address 192.168.1.200/24
    gateway 192.168.1.1
    bridge-ports enx00e04c681656
    bridge-stp off
    bridge-fd 0


source /etc/network/interfaces.d/*

 

[mho100]

same problem here with 8.2
any news on this issue?

 

[BobhWasatch]

192.168.1.200 smells a like a DHCP address. Maybe your router is blocking it since you are assigning statically. Perhaps change to something outside of your router's DHCP range.

 

[mho100]

we have 10.x.y.z and the same issue, vmbr0 ist not getting up automatically

there's also a few error msgs, before coming to login screen

 

[mho100]

this helped
https://www.thomas-krenn.com/de/wiki/Known_Issues_Proxmox_VE_8.2