Hi Moshe
there is a limit of 32 virtual interfaces when you use the fanout, because 
of the API which is using a 32-bit mask to select the egress queues.

Alfredo

> On 12 Jan 2017, at 10:32, Moshe Danielli <[email protected]> wrote:
> 
> Hi Alfredo,
> 
> I'm using the ixgbe driver with about 2.5M pps.
>  
> What I'd like to do is clone the traffic so I can run multiple tcpdump 
> instances, each with a different bpf, and store the output to a different 
> pcap file, whose name is determined by the bpf in use.
>  
> Is there a limit on the amount of virtual interfaces I can create in this 
> scenario ?
>  
> Thanks again !
>  
> Moshe
>  
> 
> On Jan 12, 2017 16:50, Alfredo Cardigliano wrote:
> Hi Moshe
> it really depends on several factors, including but not limited to traffic 
> rate (pps), bandwidth, hw specs,
> I need to know more about your traffic, hw configuration and what are you 
> trying to do in order to help you.
> 
> Best Regards
> Alfredo
> 
> > On 12 Jan 2017, at 06:00, Moshe Danielli wrote:
> > 
> > Hi Guys,
> > 
> > What is the rule of thumb when determining the maximum amount of fan out 
> > interfaces (when using zfanout_ipc) ? Is it based on bandwidth, the hw 
> > specs or a combination of both ?
> > 
> > Thanks in advance,
> > 
> > Moshe
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