[asterisk-users] asterisk and Hyper-V

Kseniya Blashchuk ksyblast at gmail.com
Wed Dec 20 06:00:21 CST 2017

I am not sure if the problem is within the system or within a hypervisor or
a vswitch. My test is quite simple - when the traffic is captured from a VM
interface, everything is fine, and there is no sound distortion; but when
the traffic is captured from the hypervisor host interface, wireshark shows
crazy delta and skew values for RTP stream, and the sound is already
distorted. The host and the vswitch are not loaded, so this makes me think
that the clock differs somehow on the VM or something like that.
Good idea about recording - I will try. I'll try with lowlatency kernel as

ср, 20 дек. 2017 г. в 14:42, Tzafrir Cohen <tzafrir.cohen at xorcom.com>:

> On Mon, Dec 18, 2017 at 10:22:33AM +0000, Kseniya Blashchuk wrote:
> > To be honest we are a bit afraid to set 100% )), but we have tried to set
> > 90% - no luck. I have also tested with 4.8 and 4.11 kernels - same
> results.
> > I will try with Centos 6 and kernel 3.10 to check if something changes.
> > VSwitch shows 1-2% load on the interfaces, and this host is not
> overloaded
> > at all, so I don't think the VM has some lack of resources.
> What indication do you have that the problem is with the kernel or
> within the system?
> If you call from Asterisk to itself (with no networking involved), is
> there still distortion?
> Consider making a conference of several local channels (Echo, Playback,
> and whatever), and record whatever channel.
> Ubuntu has a "lowlatency" kernel. Does it matter if you use that
> variant?
> --
>                Tzafrir Cohen
> +972-50-7952406 <+972%2050-795-2406>           mailto:
> tzafrir.cohen at xorcom.com
> http://www.xorcom.com
> --
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