Hello, I recently starting having ethernet connectivity issues with our USRP2. Whenever I run "find_usrps", I get a no USRP2 found message. The USRP2 worked perfectly before without any issues on a Thinkpad T410 running Ubuntu 10.10 with a repo install of gnuradio, along with the latest corresponding FPGA and firmware (XCVR2450) images. I figured that the gnuradio environment had somehow become broken, so I decided to do a clean install of gnuradio and the corresponding packages/dependencies from repo (as well as reflashing the FPGA and firmware images on the old and a new SD card) on a new system to no avail. I next tried every suggestion I could find on the mailing list and forums. This included making sure that my network-manager and firewall were disabled, using ethtool to turn rx on, setting up networking according to the UHD - USRP2 and N Serial Application Notes (as well as using the USRP2 recovery tool to set the USRP2's IP address), monitoring my ethernet interface with tcpdump and Wireshark, and disconnecting the daughterboard card, all to no avail.
When monitoring the network interface, I sometimes see the broadcast packet(s)
sent by find_usrps, and very rarely actually get a response. When I do get a
response, the connection seems to die immediately after, as find_usrps is
unable to find the USRP2 when I ran again. All the lights on the front blink
upon power up, LEDs D and F remain on afterward, I am using a gigabit interface
and cable, and the fuse is okay. USRP2 and system/package info is listed below,
as well as the output from serial and ethtool. The output from serial is most
interesting, because the eth link speed changes to 1000 and then to 0
immediately after roughly every 3 seconds. Running find_usrps immediately (like
a split second after, almost simultaneously) and only after the eth link speed
changes to 1000 yields a proper response from the USRP2 momentarily.
Has anyone seen this behavior before or have any other suggestions?
--Ricky
USRP2 Rev 4.0
XCVR2450 (Rev 753)
$ cat /etc/issue
Ubuntu 10.10 \n \l
$ uname -a
Linux gares-e5400 2.6.35-27-generic #48-Ubuntu SMP Tue Feb 22 20:25:29 UTC 2011
i686 GNU/Linux
$ dpkg -s gnuradio
Package: gnuradio
Status: install ok installed
Priority: optional
Section: comm
Installed-Size: 40
Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com>
Architecture: all
Version: 3.2.2.dfsg-1ubuntu3
Recommends: libgnuradio, libgnuradio-dev, gnuradio-doc, python-gnuradio,
gnuradio-utils, gnuradio-examples, gnuradio-apps
Description: The GNU Software Radio Toolkit
This is a virtual package that installs the entire GNU Radio and USRP software
set.
Original-Maintainer: Bdale Garbee <bd...@gag.com>
------------------
find_usrps output (when it actually works, which is very rarely)
$ find_usrps
00:50:c2:85:32:c3 hw_rev = 0x0400
------------------
ethtool output
$ sudo ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: g
Current message level: 0x000000ff (255)
Link detected: yes
------------------
Serial output (after running "sudo ethtool -A eth0 rx on," otherwise ethernet
flow control set to none)
$ screen /dev/tty.usbserial-A700eBUj 230400
TX dbid: 0x60
Rx dbid: 0x61
TxRx-NEWETH
00:50:C2:85:32:C3
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
ethernet flow control: WE_TX
Speed set to 1000
eth link changed: speed = 1000
eth link changed: speed = 0
.... the eth link speed continuos to alternate indefinitely, and every 3
seconds the eth link speed changes to 1000, and then to 0 immediately after
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