[vbox-dev] bridged network between VMs on same host is very slow

Geoff Nordli geoffn at gnaa.net
Fri Jun 24 20:29:35 GMT 2011

>From: Aleksey Ilyushin
>Sent: Friday, June 24, 2011 1:06 PM
>Subject: Re: [vbox-dev] bridged network between VMs on same host is very
>> The part I find confusing is the network speeds to other resources
>> (besides to VMs located on the same host) is fine, if it was a Windows
>> guest issue, wouldn't it affect all traffic?
>VM-to-VM transfer rate, especially such low one as 16KB/s, is a different
>This is definitely unusual and host offloading settings have no effect on
it. The
>first thing to try would be disabling offloading in the guests, it should
>somewhere in adapter properties on Windows. You may also want to enable
>internal packet capture feature as described here
>http://www.virtualbox.org/wiki/Network_tips , then mail the resulting file
to me
>directly. Do not forget to disable capture afterwards.

Thanks Aleksey.

OK, I created the pcap file, but I noticed when I enabled nictracing
performance was OK.

As soon as I disabled nictracing performance was slow again. So I figure
sending you a trace probably isn't worth it.  

Could it be something with the nictracing code? 

Any other ideas?  


More information about the vbox-dev mailing list