Network Bridge only allows one vm access at a time

[kfree]

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

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.

 

[Moayad]

Hi,

can you post the config for both VMs? qm config <VMID>

 

[kfree]

Both are running ubuntu desktop 20.04

Vm 1

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

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)

Shut down both Vm's and turned Vm 2 on first (.181)

 

[Moayad]

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]

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]

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.