Proxmox LXC container losing IP on node-reboot/container-reboot/HA-Failover

uraniumwolf22

New Member
Feb 13, 2026
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Hi all,

Proxmox VE 9.1.4
4 Nodes, ceph, HA
All network addresses are static.

As the title suggests, I've experienced on multiple containers in my cluster the container network interfaces losing their IP on a reboot, failiver, or node reboot. The only way so far to fix, is to fully remove the interfaces from the container then re-add. Clearing/changing the interface IP does not bring networking back.

Downing and upping the interface from the container does not do anything.

It does appear they still have IPV6 addresses according to <ip a>

The IP address section of both interfaces under the containers network tab, dissappear when the issue occurs. However, on clicking "edit" on the interface the ip still appears configured.

Why would my IPV4 address be vanishing in my containers?

Thanks for the help.