Network Cards from ip a command and what is listed in /etc/network/interfaces (and console) don't match

[nande65]

Hello,

I am newish to proxmox and linux, but hoping someone knows enough to help me out. I've had a proxmox server running for a few months and decided to add a new 4 port network card. Once the server rebooted the new 4 ports appeared in the console. But they did not work. I thought it was the hardware so I swapped out the card a couple of times, and after each reboot all of the interfaces were renamed, including the onboard which was never changed. I am still not able to use the ports on the new card. Not sure how to fix this strange problem

Here is what I get from ip addr. The first two entries are correct and match what is in the interfaces file/console, but the rest are a mystery, and I don't see the interfaces from the 4 port card

lo UNKNOWN 00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP>
enp10s0 UP 9c:6b:00:32:31:09 <BROADCAST,MULTICAST,UP,LOWER_UP>
vmbr0 UP 9c:6b:00:32:31:09 <BROADCAST,MULTICAST,UP,LOWER_UP>
tap100i0 UNKNOWN 2a:32:3b:cb:75:0f <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP>
fwbr100i0 UP 26:5c:49:37:07:02 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwpr100p0@fwln100i0 UP ea:2d:03:28:11:a1 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwln100i0@fwpr100p0 UP 26:5c:49:37:07:02 <BROADCAST,MULTICAST,UP,LOWER_UP>
tap102i0 UNKNOWN 96:9c:bd:cb:0a:80 <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP>
fwbr102i0 UP 72:8d:82:8a:c5:c2 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwpr102p0@fwln102i0 UP 4a:23:e1:43:e4:86 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwln102i0@fwpr102p0 UP 72:8d:82:8a:c5:c2 <BROADCAST,MULTICAST,UP,LOWER_UP>
tap107i0 UNKNOWN 26:b9:1c:71:47:c9 <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP>
fwbr107i0 UP 02:5b:4e:cb:7a:f9 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwpr107p0@fwln107i0 UP ba:63:af:aa:ad:b2 <BROADCAST,MULTICAST,UP,LOWER_UP>
fwln107i0@fwpr107p0 UP 02:5b:4e:cb:7a:f9 <BROADCAST,MULTICAST,UP,LOWER_UP>


But here is what I get from the interfaces file. The one marked as LAN NIC (part of the vmbr0 bridge) is correct, but the rest do not appear in the shell when i run ip addr.

auto lo
iface lo inet loopback

iface enp10s0 inet manual
#LAN NIC

auto enp3s0f0
iface enp3s0f0 inet static
address 192.168.2.101/24

auto enp3s0f1
iface enp3s0f1 inet static
address 192.168.2.102/24

auto enp4s0f0
iface enp4s0f0 inet static
address 192.168.2.103/24

auto enp4s0f1
iface enp4s0f1 inet static
address 192.168.2.104/24

auto vmbr0
iface vmbr0 inet static
address 192.168.1.7/24
gateway 192.168.1.1
bridge-ports enp10s0
bridge-stp off
bridge-fd 0


In the end if I add an IP address via the console to any of the cards that are in the interfaces file (the 4 port card), the NIC does not connect.

Hope I explained it well enough. I probably messed things up while troubleshooting, when I removed and added the network card multiple times.

Any help would be appreciated

Alex

 

[Dunuin]

An OS shouldn't have more than one IP of the same subnet. So giving them 192.168.2.101/24 to 192.168.2.104/24 is wrong.

Did you try another PCIe slot? Maybe that slot isn't connected because the PCIe lanes where needed elsewhere?

 

[nande65]

Hello Dunuin,

Thanks for your quick reply

Those multiple IPs in the same range were just part of my testing. I tried each port individually at first and they did not work. I've now removed all of the IP addresses to test one port at a time again, and still no bueno

My motherboard only has two PCIe slots, and the other slot is already in use for the video card. I don't know enough about how motherboards use PCIe lanes so I would need to investigate that.

Still, if the PCIe slot/lane had an issue I think I would not see the ports listed in the Proxmox console, and I am not sure that this explains why running the ip a command in a shell lists a different set of NICs.

Still a mystery to me.

Cheers.

Alex

 

[Dunuin]

Still, if the PCIe slot/lane had an issue I think I would not see the ports listed in the Proxmox console

You would and they would work but won't be fast as you then would be bottlenecked by PCIe bandwidth.