OpenVZ: Routing to external servers in same subnet not working

Stephan J.

New Member
Apr 24, 2012
17
1
1
Hello,

We have a cluster of four servers: s01, s02, s03 and s04. s01 - s03 were setup and taken online at the same time and are almost identical. The only difference being that s03 has a larger SATA-Disk and s01/s02 have smaller SAS-Disks.

Now since a couple of weeks, the routing to external servers in the same subnet suddenly stopped working from containers on s01 and s02. From s03 it works. From a KVM-Container on s01 it still works but from a vz-container on s01 we cannot reach servers in the same subnet. s01 can also not ping s02 on the external IP-Address (same subnet) and vice-versa.

We are running Proxmox 2.1.14. I know it's rather old, but still it should not just suddenly stop working.

We cannot find the cause of this and I would appreciate input on how to investigate. We didn't change anything and the only thing that happened was an update of the IPMI-Firmware (supermicro), but our datacenter-provider says that this cannot have had an influence.

Has anyone had a similar issue and can give some pointers on how to go about this?

Kind regards -Stephan