Network Bridge only allows one vm access at a time

kfree

New Member
Mar 30, 2022
4
0
1
When I turn on multiple vm's only one gets network access. if I shut vm A off then vm B gets network, vice versa.

Both vm's have static ip and non conflicting auto mac's, using

here's the proxmox hosts interfaces config

Code:
auto lo
iface lo inet loopback

iface eno3 inet manual

auto eno4
iface eno4 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.100.22/24
        gateway 192.168.100.3
        bridge-ports eno3
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet manual
        bridge-ports eno4
        bridge-stp off
        bridge-fd 0
Server is a Dell R730 with a 4 port intel daughter card
I've checked the switch it's connected to and it's in port access mode, has no security limit for total mac addresses, etc.

I want to try using proxmox in production here but trivial things like this have been non stop and i'm about to give up and write proxmox off as a buggy mess.
vsphere has been plug and play while every $*@# setting on proxmox has been a troubleshooting nightmare.
 
Last edited:

kfree

New Member
Mar 30, 2022
4
0
1
Both are running ubuntu desktop 20.04

Vm 1

Code:
boot: order=scsi0;ide2;net0
cores: 2
ide2: local:iso/ubuntu-20.04.4-desktop-amd64.iso,media=cdrom
memory: 4096
meta: creation-qemu=6.1.1,ctime=1648649545
name: ******
net0: virtio=C2:BB:63:51:2F:51,bridge=vmbr1
numa: 0
onboot: 1
ostype: l26
scsi0: Data:vm-100-disk-0,size=1096G
scsihw: virtio-scsi-pci
smbios1: uuid=97bd9881-ed47-4a89-920a-52210e43ed2b
sockets: 1
vmgenid: b10d28a5-c6b7-4802-978c-7963ed08c5ae

Vm 2

Code:
boot: order=scsi0;net0
cores: 2
memory: 4096
meta: creation-qemu=6.1.1,ctime=1648664020
name: ******
net0: virtio=76:FE:85:B4:14:9C,bridge=vmbr1
numa: 0
ostype: l26
scsi0: Data:vm-102-disk-0,size=150G
scsihw: virtio-scsi-pci
smbios1: uuid=afed0ba0-6cc7-4183-af4a-ad686baa45c2
sockets: 1
vmgenid: 9bc45413-086f-476e-88ff-a05c6347b8b5

Here's an example. Turned Vm 1 on first (.180)
1648729412275.png
Shut down both Vm's and turned Vm 2 on first (.181)
1648729687000.png
 

Moayad

Proxmox Staff Member
Staff member
Jan 2, 2020
2,120
173
68
29
Vienna
shop.maurer-it.com
Hi,

thank you for the VM configs and the screenshots!
did you create the second VM or cloned it from the first one? did you check the syslog/journalctl during the start of the second Ubuntu VM?
 

kfree

New Member
Mar 30, 2022
4
0
1
Not the answer I was looking for...

Wiped the host and reinstalled proxmox and now the bridge seems to work fine.

Both vm's were fresh installs from the same ISO, just used that same ISO to reinstall the vm's after wiping the host.

I hate that I don't know what caused the issue and that wiping the host *fixed* it. (╯°□°)╯︵ ┻━┻

If the issue pops up after some time i'll reopen this.
 

kfree

New Member
Mar 30, 2022
4
0
1
Hi,

thank you for the VM configs and the screenshots!
did you create the second VM or cloned it from the first one? did you check the syslog/journalctl during the start of the second Ubuntu VM?
Thank you for your efforts.
 

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get your own in 60 seconds.

Buy now!