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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