Re: [Discuss-gnuradio] Ethernet latency optimization

[Marcus D. Leech]

On 05/02/2013 09:23 PM, NaceurElOuni wrote:
> and do I need to consequently change the IP @ of the second USRP N210 that
> will be communicating with the host via SubNet2 ?
>
> Best regards.
The IP protocol suite requires that every device have their own 
address.  Whether that device is a computer, or a toaster, or USRP, or a 
router,
  or an iPhone, or your cyberdog, or whatever.

So, yes, every USRP will need its own address.  Whether that address is 
on a unique subnet (one ethernet card per USRP), or whether it's
  shared, on the same subnet.   That is a requirement of the way IP works.

Which means that you'll need to set unique addresses on each of your USRPs.

I encourage you to familiarize yourself with the entire doc tree 
maintained here:

http://files.ettus.com/uhd_docs/manual/html/index.html

And particularly:

http://files.ettus.com/uhd_docs/manual/html/usrp2.html#multiple-devices-per-host


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org