High Ping Latency on OpenVZ, KVM no problem....

[nl1gsd]

Is anyone aware of a problem with high ping responses when using OpenVZ ?

When I ping ip-addresses which are using KVM, the ping responses are always around 18ms just as the main server IP. But when I try to ping a ip-address which is using OpenVZ i'll always have a ping response between 65-80ms.

Hopefully there's someone who'm can help me solving the high ping latency. I've been trying to find a solution via google, but didn't found any.


Regards,
Gerrit.

 

[udo]

Is anyone aware of a problem with high ping responses when using OpenVZ ?

When I ping ip-addresses which are using KVM, the ping responses are always around 18ms just as the main server IP. But when I try to ping a ip-address which is using OpenVZ i'll always have a ping response between 65-80ms.

Hopefully there's someone who'm can help me solving the high ping latency. I've been trying to find a solution via google, but didn't found any.


Regards,
Gerrit.

Hi,
strange! Have you tried to use tcpdump to find the issue?
Do you use bridging networking with the OpenVZ-VMs also?

Udo

 

[nl1gsd]

Hi,

It's strange indeed... I even found out that it's even not because of a OpenVZ VM itself. I found out that one of my VM's using OpenVZ has 4 IP-addresses attached, on 2 of those it seems the latency run up to 80-100ms, the others just seems to be normal between 15 and 20ms at the moment *stable*

Attaching one of the IP's which is having a high latency, on another doesn't seem to give the solution. Adding the IP-Address on a VirtualMAC (@OVH) and using it then, doesn't bring the solution as well. I'm even thinking of IP problems itself which isn't any fault or problem on proxmox. It's even a problem on IP's within different subnets 178.33.22.xxx 178.32.190.xxx e.g.

About the tcpdump, I'd tried that but it went to fast .... doing just a few lines gave me a strange kind of output I don't understand. But because of the latest update I just gave, I'm thinking of a network problem itself.

Btw. Udo; I'm only using the venet thing ... don't know if it's a bridge or not.