Open Stack

What MTU are you using (try different ping sizes to see if this problem
also occurs with large pings.)  You will likely want to limit the vms to
1454 MTU and re-run your tests. Google for GRE OPENSTACK MTU for more info.


On Mon, Aug 25, 2014 at 11:23 AM, Taeheum Na <thna at nm.gist.ac.kr> wrote:

> Hello, I tried to measure network performance BTW VM which connected
> through GRE tunnel. So, I configured neutron(ML2/GRE).
>
> Then I verified TCP performance between VMs which are placed on same host.
>
> But I could not make Iperf connection BTW VMs (on other host), but ping is
> ok.
>
> bellow things are current Security group configuration. I think that I
> allow all traffic which is needed to execute iperf.
>
> +-------------+-----------+---------+-----------+--------------+
>
> | IP Protocol | From Port | To Port | IP Range  | Source Group |
>
> +-------------+-----------+---------+-----------+--------------+
>
> | udp         | 1         | 65535   | 0.0.0.0/0 |              |
>
> | tcp         | 1         | 65535   | 0.0.0.0/0 |              |
>
> | icmp        | -1        | -1      | 0.0.0.0/0 |              |
>
> +-------------+-----------+---------+-----------+--------------+
>
> Do you have any comment?
>
>
>
> Regards
>
> Taeheum Na
>
> ****************************************************
>
> M.S. candidate of Networked Computing Systems Lab.
>
> School of Information and Communications
>
> GIST (Gwangju Inst. of Sci. and Tech.)
>
> E-mail: thna at nm.gist.ac.kr
>
> Phone: +82-10-2238-9424
>
> Office: +82-62-715-2273
>
>
>
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