If that helps, you can disable individual interfaces from being managed.
In /etc/NetworkManager/NetworkManager.conf
add the lines:
[keyfile]
unmanaged-devices=interface-name:sfp0
Ron
On 9/3/20 12:41, Venkatesh Sathyanarayanan via USRP-users wrote:
Thanks a lot Michael and cedric for taking time to answer my
questions.. I will try to stop the network manager and see if that helps.
Regards
Venkatesh
On Thursday, September 3, 2020, Michael Dickens
<michael.dick...@ettus.com <mailto:michael.dick...@ettus.com>> wrote:
In my experience, this happens when the networking isn't stable,
which can be for all sorts of reasons:
* connectors / cables are flaky;
* host SW configuration isn't quite correct;
* actual NIC has issues, HW or FW / configuration;
* USRP NIC has issues ... very rare, but it can happen;
* USRP FPGA has issues ... again rare, but it can happen;
* USRP filesystem has issues ... could be the FS itself, or
configuration ... this happens sometimes & is usually resolved by
overwriting the whole SDcard filesystem & starting from "go" there.
If you're Linux has the network manager, that doesn't help things
since it thinks it knows better than you what to be doing.
There is no "one size fits all" answer unfortunately; just
investigate the networking & make sure all of the parts are
functional.
Hope this is useful! - MLD
On Thu, Sep 3, 2020 at 3:30 AM Cedric Roux via USRP-users
<usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>>
wrote:
maybe network manager (if you have that thing running) on the
computer doing funny things with the interface? I had this
issue with some 4g dongles in the past.
On 2020-09-03 01:01, Venkatesh Sathyanarayanan via USRP-users
wrote:
> Hi,
>
> Small correction:
>
> *Questions:*
> I notice that the test stops when the link goes down every
45 seconds.
> This happens for all types of tests(with and without GUI).
> Kindly let me know how to debug this - i.e. why the link
goes down every
> 45 seconds?
>
> Regards
> Venkatesh
>
> On Wed, Sep 2, 2020 at 3:10 PM Venkatesh Sathyanarayanan
> <vesat...@eng.ucsd.edu <mailto:vesat...@eng.ucsd.edu>
<mailto:vesat...@eng.ucsd.edu <mailto:vesat...@eng.ucsd.edu>>>
wrote:
>
> Hi,
>
>
> *Setup details:*
> I am using an USRP N310 and I have the host computer
connected to
> the USRP via SFP cable. I additionally have a serial
connection
> between the two and have a screen session running.
>
> *Observation:*
> On the screen session, I noticed the following messages:
> [ 2151.041079] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2195.841088] nixge 40000000.ethernet sfp0: Link is Down
> [ 2196.961090] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2241.761098] nixge 40000000.ethernet sfp0: Link is Down
> [ 2242.881106] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2287.681109] nixge 40000000.ethernet sfp0: Link is Down
> [ 2288.801114] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2333.601129] nixge 40000000.ethernet sfp0: Link is Down
> [ 2334.721127] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2379.521132] nixge 40000000.ethernet sfp0: Link is Down
> [ 2380.641137] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2425.441143] nixge 40000000.ethernet sfp0: Link is Down
> [ 2426.561149] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2471.361159] nixge 40000000.ethernet sfp0: Link is Down
> [ 2472.481166] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
> [ 2517.281166] nixge 40000000.ethernet sfp0: Link is Down
> [ 2518.401171] nixge 40000000.ethernet sfp0: Link is Up -
> 10Gbps/Full - flow control off
>
..........................................................................................................................................................................
>
..........................................................................................................................................................................
>
>
..........................................................................................................................................................................
>
..........................................................................................................................................................................
>
> *Questions:*
> When I have a GNU radio GRC running with an active GUI
displaying
> the spectrum, I see that it halts at the time when the
link goes down.
> When I run a file with no GUI active - say IQ samples
saved to a
> file, things running in the background and I do not see any
> interruption.
>
> 1. Kindly let me know why I am seeing this issue of
link going down
> every 45 seconds and
> 2. also if this could potentially affect my tests (all
my tests are
> without any GUI.)
>
>
> Regards
> Venkatesh
>
>
> _______________________________________________
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