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 < [email protected]> 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 > > <[email protected] <mailto:[email protected]>> 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 > > > > > > _______________________________________________ > > USRP-users mailing list > > [email protected] > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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