VLAN networking error in Proxmox

lalaman

New Member
Aug 21, 2024
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0
1
Hi all.

I have this weird problem that I have in Proxmox. I'm not sure where went wrong. Basically I have proxmox server+L3 switch setup. Interface VLANs are created on the switch itself. This will be the gateway (E.g 192.168.1.1) for the Proxmox VMs which have a default IP route pointing to this 192.168.1.1.

VMs are Opensuse leap 15.6

Similar VMs were created with a tagged VLAN of 119, however some of them is unable to ping their VLAN gateway for some reason while other VMs can in the same server. Which is really weird.
1731462728680.png
This issue happened as the VMs grew and number of VLANs grew.
Sometimes by changing the model back to Intel E1000 and then back to VirtIO (paravirtualized), it works for a while and the VMs can reach the internet/VLAN gateway but then the same type of problem comes up again.

For my proxmox server, I'm using a vmbr0 bridged port that is mapped to a physical NIC (ens15f0np0). It is VLAN aware.
I have created a vmbr0.111 for using my proxmox web interface and its default gateway is the switch in vlan 111. Proxmox servers itself never have any issues.

1731462818104.png

Anyone have any ideas or clues to solve this?
 

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