[Discuss-gnuradio] USRP N210 Network Issues

[Justyn Bell]

Hello list,

Hopefully this is an appropriate place to ask this question:

I'm trying to connect a host machine to a switch in which a USRP N210 is also connected.  I have configured the host machine's IP to be static on the 192.168.10.0/24 subnet, and can successfully ping the N210 at 192.168.10.2.  However, when I try to do a "uhd_usrp_probe", the command simply returns the following:

linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-152-gdb8f128e

Error: Connection refused

I have also tried to do "uhd_usrp_probe --args="addr=192.168.10.2" in which case it returns the following:

linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-152-gdb8f128e

Error: LookupError: KeyError: No devices found for ----->
Device Address:
    addr: 192.168.10.2

My first thought was that it is some kind of firewall issue, so I issued a "sudo ufw disable", but the results didn't change (when trying to probe, it returns the above errors, I can still ping).

According to http://files.ettus.com/uhd_docs/manual/html/usrp2.html#setup-networking, "When the IP address is not specified, the device discovery broadcasts UDP packets from each ethernet interface."  Which implies that broadcast UDP packets are not sent when an IP is specified (which is what I did in my second attempt to probe the USRP), so I don't think it's a firewall issue.

The switch is a Netgear GS608 which I don't think has "broadcast storm" control, anyway.

Thanks for any help on the issue.

--
Justyn