Issue Additional IPs Not Working After Migrating Plesk CT to Proxmox v8 (OVH)

[ThinkYEAH]

Server operating system version

debian 12

Plesk version and microupdate number

Obsidian 18.0.70 Update 2

Hi,


We have been running a Plesk CT (latest version) on an OVH dedicated server with Proxmox v7 without issues. We recently ordered a new server from OVH, installed Proxmox v8 (fully updated), and migrated the Plesk CT by taking a backup and restoring it to the new Proxmox v8 host.


We generated a new MAC address in the OVH panel and added it to the CT network settings. However, after completing the migration, the additional IPs are not working. Websites using additional IPs are down, while sites using the main Plesk IP continue to work normally.


When we move the CT back to Proxmox v7, everything works fine again.


Could you please advise on how to resolve this issue on Proxmox v8?


Thank you for your help!

 

[Raul A.]

Hi,

Can you ping from the additional IP addresses?

ping 1.1.1.1 -I additional.ip

On Proxmox you have distinct IP addresses on distinct interfaces as opposed to other hypervisors.

Can you share the Proxmox network settings for the CT?

 

[ThinkYEAH]

Hi,

Can you ping from the additional IP addresses?

ping 1.1.1.1 -I additional.ip

On Proxmox you have distinct IP addresses on distinct interfaces as opposed to other hypervisors.

Can you share the Proxmox network settings for the CT?

Hi,

Thanks for your reply!

Can you ping from the additional IP addresses?

ping 1.1.1.1 -I additional.ip

From plesk on proxmox v7 i can ping 1.1.1.1 or other dns (exmple 8.8.8.8)
From plesk on proxmox v8 i can't ping 1.1.1.1 or other DNS.

Can you share the Proxmox network settings for the CT?
For security reason i replaced my IP with 0 (zero)


Thank you again for help!

 

[Raul A.]

You have only 1 bridge, vmbr0?

Do all IP addresses have the same gateway? You can have only 1 default gateway per routing table.