I have a 6-port Intel I226-V machine. After upgrading from Proxmox VE 8.4 to 9.1, two network ports disappeared from the system (enp5s0 and enp7s0).

[satfan]

Hello,


I have a 6-port Intel I226-V machine. After upgrading from Proxmox VE 8.4 to 9.1, two network ports disappeared from the system (enp5s0 and enp7s0).


From the kernel boot log, all 6 NICs are detected and named correctly by the igc driver:

plaintext





[ 1.706602] igc 0000:01:00.0 enp1s0: renamed from eth0<br>[ 1.707101] igc 0000:02:00.0 enp2s0: renamed from eth1<br>[ 1.707841] igc 0000:04:00.0 enp4s0: renamed from eth3<br>[ 1.708763] igc 0000:07:00.0 enp7s0: renamed from eth5<br>[ 1.711823] igc 0000:03:00.0 enp3s0: renamed from eth2<br>[ 1.712250] igc 0000:05:00.0 enp5s0: renamed from eth4<br>



But once the system finishes booting, ip link and ls /sys/class/net only show 4 interfaces:

• enp1s0
• enp2s0
• enp3s0
• enp4s0

enp5s0 and enp7s0 are goneand cannot be used in bridges.

lspci still shows all 6 Intel I226-V controllers.


All ports worked perfectly in PVE 8.4. The issue started right after upgrading to PVE 9.1.


I’ve tried:

• modprobe -r igc &amp;&amp; modprobe igc
• Manually ip link set enp5s0 up (returns "Cannot find device")
• Verified no net.ifnames=0 or biosdevname=0
• Checked /etc/network/interfaces for stale config

Any idea why two NICs are detected at boot but disappear later in PVE 9.1?

Thanks for any help.

 

[satfan]

root@pve:~# dmesg | grep -i eth
[ 1.296473] Intel(R) 2.5G Ethernet Linux Driver
[ 1.377443] igc 0000:01:00.0 eth0: MAC: a8:b8:e0:00:52:33
[ 1.435696] igc 0000:02:00.0 eth1: MAC: a8:b8:e0:00:52:34
[ 1.495656] igc 0000:03:00.0 eth2: MAC: a8:b8:e0:00:52:35
[ 1.561367] igc 0000:04:00.0 eth3: MAC: a8:b8:e0:00:52:36
[ 1.630361] igc 0000:05:00.0 eth4: MAC: a8:b8:e0:00:52:37
[ 1.701408] igc 0000:07:00.0 eth5: MAC: a8:b8:e0:00:52:38
[ 1.706602] igc 0000:01:00.0 enp1s0: renamed from eth0
[ 1.707101] igc 0000:02:00.0 enp2s0: renamed from eth1
[ 1.707841] igc 0000:04:00.0 enp4s0: renamed from eth3
[ 1.708763] igc 0000:07:00.0 enp7s0: renamed from eth5
[ 1.711823] igc 0000:03:00.0 enp3s0: renamed from eth2
[ 1.712250] igc 0000:05:00.0 enp5s0: renamed from eth4
[ 12.762660] vmbr0: port 2(veth101i0) entered blocking state
[ 12.762666] vmbr0: port 2(veth101i0) entered disabled state
[ 12.762686] veth101i0: entered allmulticast mode
[ 12.762730] veth101i0: entered promiscuous mode
[ 12.802036] eth0: renamed from vethzmh3sn
[ 13.316609] vmbr0: port 2(veth101i0) entered blocking state
[ 13.316615] vmbr0: port 2(veth101i0) entered forwarding state
[ 15.484083] docker0: port 1(veth5502331) entered blocking state
[ 15.484090] docker0: port 1(veth5502331) entered disabled state
[ 15.484099] veth5502331: entered allmulticast mode
[ 15.484144] veth5502331: entered promiscuous mode
[ 15.503254] docker0: port 2(veth0559b32) entered blocking state
[ 15.503260] docker0: port 2(veth0559b32) entered disabled state
[ 15.503278] veth0559b32: entered allmulticast mode
[ 15.503321] veth0559b32: entered promiscuous mode
[ 15.543214] docker0: port 3(vethdd992f0) entered blocking state
[ 15.543221] docker0: port 3(vethdd992f0) entered disabled state
[ 15.543241] vethdd992f0: entered allmulticast mode
[ 15.543293] vethdd992f0: entered promiscuous mode
[ 15.594781] docker0: port 4(veth9301e94) entered blocking state
[ 15.594788] docker0: port 4(veth9301e94) entered disabled state
[ 15.594809] veth9301e94: entered allmulticast mode
[ 15.594864] veth9301e94: entered promiscuous mode
[ 15.847861] eth0: renamed from veth0ab11da
[ 15.849069] docker0: port 2(veth0559b32) entered blocking state
[ 15.849076] docker0: port 2(veth0559b32) entered forwarding state
[ 15.964198] eth0: renamed from vethbe013e7
[ 15.964624] docker0: port 1(veth5502331) entered blocking state
[ 15.964631] docker0: port 1(veth5502331) entered forwarding state
[ 15.987443] eth0: renamed from vethfd5ff73
[ 15.988043] docker0: port 4(veth9301e94) entered blocking state
[ 15.988047] docker0: port 4(veth9301e94) entered forwarding state
[ 15.997566] eth0: renamed from veth982bd82
[ 15.998071] docker0: port 3(vethdd992f0) entered blocking state
[ 15.998076] docker0: port 3(vethdd992f0) entered forwarding state
[ 20.100876] vmbr0: port 5(veth106i0) entered blocking state
[ 20.100884] vmbr0: port 5(veth106i0) entered disabled state
[ 20.100910] veth106i0: entered allmulticast mode
[ 20.101001] veth106i0: entered promiscuous mode
[ 20.140911] eth0: renamed from vethGLsfgu
[ 20.678602] vmbr0: port 5(veth106i0) entered blocking state
[ 20.678609] vmbr0: port 5(veth106i0) entered forwarding state

 

[satfan]

I have a 6-port Intel I226-V machine. After upgrading from PVE 8.4 to 9.1, two network interfaces enp5s0 and enp7s0 are detected during boot but disappear later from the system.
The kernel boot log shows all 6 NICs are correctly named by the igc driver:
plaintext
[ 1.706602] igc 0000:01:00.0 enp1s0: renamed from eth0
[ 1.707101] igc 0000:02:00.0 enp2s0: renamed from eth1
[ 1.707841] igc 0000:04:00.0 enp4s0: renamed from eth3
[ 1.708763] igc 0000:07:00.0 enp7s0: renamed from eth5
[ 1.711823] igc 0000:03:00.0 enp3s0: renamed from eth2
[ 1.712250] igc 0000:05:00.0 enp5s0: renamed from eth4
But shortly after boot, I get these two lines (PHC removed):
plaintext
[ 11.850910] igc 0000:07:00.0 enp7s0: PHC removed
[ 12.050203] igc 0000:05:00.0 enp5s0: PHC removed
After that, enp5s0 and enp7s0 are completely gone from:
ip link
ls /sys/class/net
nmcli
Proxmox GUI network list (except hardware info)
The other 4 ports work normally. All 6 ports worked perfectly in PVE 8.4.
I have tried:
modprobe -r igc && modprobe igc
update-initramfs -u -k all
upgrade to latest pve-kernel
disable Secure Boot
check no udev rules deleting interfaces
check lspci: all 6 I226-V controllers still present
This appears to be an igc driver issue in PVE 9.1 kernel where some Intel I226-V ports are removed with PHC removed.
Does anyone know how to prevent PHC removed and keep all NICs online?
Thanks for any help.

 

[dcsapak]

can you post the full output of dmesg? that may reveal some more information what is happening here