So each port on the server/host must be on a different subnet?

192.168.1...
192.168.2...

and so on?

Also when you define NIC do you mean each individual port or the chip/card
itself?

In other words, is our Intel x520-DA2 (card with 2-SFP+ ports) one NIC or
two?

Thanks for the fast responses everyone.







On Mon, Jan 21, 2019 at 4:08 PM Marcus D. Leech via USRP-users <
usrp-users@lists.ettus.com> wrote:

> On 01/21/2019 05:39 PM, Ali Dormiani via USRP-users wrote:
>
> * sorry typo
>
> Each of my N310's SFP+0 ports is configured as follows:
>
> MTU: 8000
>
> Address: 192.168.20.5x/24
>
> On Mon, Jan 21, 2019 at 2:37 PM Ali Dormiani <sdorm...@eng.ucsd.edu>
> wrote:
>
>> Hello everyone,
>>
>> I am having a strange (new) problem where my host machine can not detect
>> more than one USRP at a time. I recently re-installed everything to update
>> all devices to 3.13.1.0.
>>
>> Each of my N310's SFP+0 ports is configured as follows:
>>
>> MTU: 8000
>>
>> Address: 192.168.5x/24
>>
>> Where x is the device number I have assigned (1-9).
>>
>> What is bizarre is if two N310's are connected to the host, only one
>> shows up in uhd_find_devices.
>>
>> Each N310 connects fine on its own. Just plug and play. But attaching
>> more than one to the server breaks things.
>>
>> The server is manually configured with a different static ip for each
>> SFP+ port:
>>
>> 192.168.20.2y
>>
>> Where y is the port number (0-6).
>>
>> Everything (SD file system, host install, FPGA, ixgbe driver) is up to
>> date. I can do whatever I want if only one device is attached (SSH, UHD
>> commands, GNU radio, device_probe).
>>
>>
>> I'm not sure what to do about this as individually all of them work
>> perfectly. Any ideas?
>>
>> Thank you for your time,
>>
>> Ali
>>
>>
>> Having two NICs on your server living on the same subnet (192.168.20) is
> likely to not work because that's not how the IP routing machinery works in
>   most host operating systems--the routing machinery will use the first
> port it finds that "matches" the desired destination address subnet.
>
>
>
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