[Discuss-gnuradio] Fwd: Overflow error even at lower sampling rates

[john jade]

Hi Jeff,

Thanks for your reply.

when i try mii-tool i am getting following output

 sudo mii-tool -v eth0
SIOCGMIIREG on eth0 failed: Input/output error
SIOCGMIIREG on eth0 failed: Input/output error
eth0: negotiated 1000baseT-FD flow-control, link ok
  product info: vendor 00:55:00, model 9 rev 0

  basic mode:   autonegotiation enabled
  basic status: autonegotiation complete, link ok

  capabilities: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

  advertising:  1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control
  link partner: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

What does it show.Is it running at wrong speed.If yes then how do i change it.

Why am i getting this error "SIOCGMIIREG on eth0 failed: Input/output error"

What do you mean by direct connection?

Thanks.

On Tue, Mar 19, 2013 at 3:12 PM, Jeff Scaparra <address@hidden> wrote:

One thing it to ensure that your card is running at gigabit speed and not auto-negotiated to 10/100 and not 1000. Since your on linux you could run iftop and watch the connection speed. You can also verify the speed with mii-tool. My interface is called enp7s0:

                                                                                            

address@hidden ~]$ sudo mii-tool -v enp7s0                                                                                                                                                                                                                                                   

enp7s0: negotiated 1000baseT-FD flow-control, link ok                                                                                                        

  product info: vendor 00:07:32, model 17 rev 4                                                                                                              

  basic mode:   autonegotiation enabled                                                                                                                      

  basic status: autonegotiation complete, link ok                                                                                                            

  capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD                                                                    

  advertising:  1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control                                                       

  link partner: 1000baseT-FD 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control

If your interface is running at the wrong speed you may want to try a direct connection to the USRP, a new cable, or worse case a new network card.

Best of luck,

Jeff N6SDR

On Tue, Mar 19, 2013 at 12:30 AM, john jade <address@hidden> wrote:

Hi,

I am getting overflow error ,even at low sampling rates.I am using USRP N210 device.If the sampling rate is less than 5MHz then there is no error.I know that USRP N210 can support at Max 25MHz.Can you please tell me what might be the problem?

I just connected UHD source block to FFT sink in my example.

My system specifications.

OS :Ubuntu 12.10

processor :Intel  Core i5-3570 CPU @ 3.40GHz × 4

RAM 4GB

I am using 1Gbit Ethernet card.

Thanks

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