On 08/20/2013 01:27 PM, Marcus Müller wrote:
Hi Victor,
this looks like a network malconfiguration.
With redhat/fedora-based Distributions usually a rather restrictive
firewall is shipped, disabling a range of types of broadcast traffic.
The issue is described at
http://files.ettus.com/uhd_docs/manual/html/usrp2.html#firewall-issues ;
use the firewall administration utility to change the settings
accordingly.
Greetings,
Marcus M
On 20.08.2013 19:13, Victor User wrote:
Hello, I'm new to using GNURadio and the USRP.
I'm running Fedora 17 with GNURadio (3.5.3.1) and UHD (3.4.3)
installed with yum.
I'm trying to run uhd_fft.py and I get the following error:
$ ./uhd_fft.py
linux; GNU C++ version 4.7.0 20120507 (Red Hat 4.7.0-5);
Boost_104800; UHD_003.004.003-0-unknown
Using Volk machine: sse4_1_64_orc
Traceback (most recent call last):
File "./uhd_fft.py", line 180, in <module>
tb = uhd_fft(gain=options.gain, freq=options.freq,
address=options.address, samp_rate=options.samp_rate)
File "./uhd_fft.py", line 110, in __init__
channels=range(1),
File
"/usr/local/lib64/python2.7/site-packages/gnuradio/uhd/__init__.py",
line 116, in constructor_interceptor
return old_constructor(*args)
File
"/usr/local/lib64/python2.7/site-packages/gnuradio/uhd/uhd_swig.py",
line 2296, in usrp_source
return _uhd_swig.usrp_source(*args)
RuntimeError: send_to: Network is unreachable
Basically what's going on is that UHD, when given no hint about what
device to go looking for, goes down a list of things to try.
When it tries to do a broadcast "probe" to find a USRP2 or N210
device, it can get an error back from the kernel.
But if you use an *explicit* device address, you can avoid that problem.
You don't indicate what type of USRP you have, but:
uhd_fft --args "addr=192.168.10.2"
or
uhd_fft --args "type=b100"
or
uhd_fft --args "type=usrp1"
Will avoid this problem, as will tweaking your firewall and network
configuration
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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