Hey Fuller,
What hypervisor are you using ? I know you have checked all bandwidth limit on
templates and global settings, but it’s worth to check the QoS on the
hypervisor level, because at the end it’s the hypervisor which manages all.
And from where are you trying to check the network throughout, between client
and server ?
Vivek Kumar
Sr. Manager - Cloud & DevOps
TechOps | Indiqus Technologies
+ 91 7503460090 <tel:++91+7503460090>
vivek.ku...@indiqus.com <mailto:vivek.ku...@indiqus.com>
www.indiqus.com <https://www.indiqus.com/>
> On 28-Jun-2022, at 1:58 AM, S.Fuller <steveful...@gmail.com> wrote:
>
> Environment:
>
> Two physical hosts
> - Cloudstack 4.11.3
> - Verified that there are no bandwidth limits in place on any of the
> templates or in global settings.
>
> Two isolated networks ("Client" and "Server")
> - Each has a vrouter with a public and private address
> - One Windows 2016 VM on each network (running the latest virtio drivers)
> - each node running latest version of Iperf3 to test throughput
>
> Testing/Observation:
>
> If the Client VM and the vrouter for the isolated Client network are on the
> same physical host, we see symmetrical throughput in the 2 Gbps range,
> whether we run iperf in regular mode or in reverse mode (iperf -R).
>
> If the Client VM and the vrouter for the isolated Client network are on
> different physical hosts, we are seeing 25% of the throughput running iperf
> in regular mode vs running it in reverse mode.
>
> Has anyone encountered this issue before? If we change the Client VM to
> Linux (either CentOS 7 or Ubuntu) OR we use the E1000 driver, we see
> symmetrical throughput in our tests, no matter where the vrouter is in
> relation to the Client VM.
>
> --
> Steve Fuller
> steveful...@gmail.com
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