Re: [Discuss-gnuradio] TUN/TAP PDU not working

[Derek Kozel]

Hello Cinaed,

I have no experience with the TUN/TAP code or setup, but the B210 is an SDR which can only be connected to the host using USB. There is no IP address associated with it.
https://www.ettus.com/product/details/UB210-KIT

Regards,

Derek

On Thu, Jun 22, 2017 at 10:29 AM, Cinaed Simson <address@hidden> wrote:

On 06/17/2017 04:26 AM, address@hidden wrote:
> Hi Cinaed,
>
> Sorry to miss the previous email.
>
> I need to clarify that B210 USRP is connected to the PC though USB cable. That's why my Ethernet cards are disabled.
>
> Meanwhile I have been trying different things and I noticed the followings:
>
> 1- Packet Encoder/Decoder blocks work fine with GMSK modulation scheme. But with other modulation like QAM and PSK, it seems to be less efficient.
>
> 2- I can receive any packet delivered to the virtual IP address I create using GNURadio. I also can print them to the console in GNURadio.
>
> 3- I can easily send/receive any form of information using GMSK Scheme along with packet encoder/decoder from one USRP to another>
> 4- but whatever I do I can't put the received packets from virtual IP address though GMSK and packet en/decoder.

Try setting the IP address of your USRP in the properties by replacing

  Device Address="name=USRP_1"

with

  Device Address="addr=192.168.200.1"

-- Cinaed

>
> Sincerely,
> Mansour.
>
>> On 17 Jun 2017, at 02:46, Cinaed Simson <address@hidden> wrote:
>>
>> Incidentally, all you need is a $20-$30 Ethernet switch with 5-8 ports,
>> and 3 CAT-6 Ethernet cables - twice as long as you think might need.
>>
>> Then plug 1 one cable into each of the 3 device and plug the other end
>> the of all the cables into the switch.
>>
>> Configure them as below and you should be able to ping all the devices
>> from either the desktop or the laptop.
>>
>> -- Cinaed
>>
>>
>>> On 06/15/2017 02:49 PM, Cinaed Simson wrote:
>>>
>>> I'll assume they're connected correctly.
>>>
>>> On the both PC1 and PC2, type
>>>
>>>  ip tuntap del dev tap0 mode tap
>>>
>>> On PC1, type
>>>
>>>  ifconfig enp0s31f6 inet 192.168.200.1 netmask 255.255.255.0
>>>  ifconfig enp0s31f6 up
>>>
>>> On PC2, type
>>>
>>>  ifconfig enp0s31f6 inet 192.168.200.3 netmask 255.255.255.0
>>>  ifconfig enp0s31f6 up
>>>
>>> Then on either PC, ping the other one. Try pinging the USRP. The pinging
>>> shoud work - unless you have more than one Ethernet card and you plugged
>>> the cable into the wrong card.
>>>
>>> The idea is a tap relies on the existing Ethernet framing (and hence
>>> routing) so if the machines are connected correctly then configuring
>>> their Ethernet cards should provide the necessary infrastructure.
>>>
>>> Also, you need to go the USRP mailing list and ask them how to change
>>> the IP address of the B210 - it's something you should know how to do.
>>>
>>> In general, the tap address on the B210 should have the same network
>>> address as your PC.
>>>
>>> The network address of PC1 is 192.168.200.0 and the host address
>>> 192.168.200.1.
>>>
>>> -- Cinaed
>>>
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>>
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