[Discuss-gnuradio] Re: usrp2 with atl1e gigabit ethernet device

[Christopher Friedt]

Someone told me that the USRP2 does not respond when connected to a
100/10 Mbps ethernet device. So, by default, the LEDs apparently do
not turn on unless connected to a gigabit device.

Even though my ethernet device was a gigabit adapter, thee LEDs still
did not turn on. That leads me to believe either

a) the MDIX auto-negotiation is not working, or
b) my ethernet device is not configured for gigabit speeds, even
though it's capable of it.

Does anyone else on the list have a device that uses the atl1e ethernet adapter?

C

On Wed, Nov 18, 2009 at 12:19 PM, Christopher Friedt
<address@hidden> wrote:
> It would seem that the atl1e device does support manual MDI
> configuration, according to this [1].
>
>
>
> [1] http://lwn.net/Articles/289918/
>
> On Wed, Nov 18, 2009 at 12:14 PM, Christopher Friedt
> <address@hidden> wrote:
>> Hi list,
>>
>> I've connected a USRP2 to my laptop's gigabit ethernet [1] and the
>> USRP2's ethernet indicator LED is not on. Running find_usrp2s returns
>> zero results on my machine, while on another machine, using the same
>> cable, the USRP2 is detected.
>>
>> I've read that some people have actually had it working well with the
>> same gigabit ethernet device [2] and was hoping that someone else
>> could say what the problem is here. My first instinct is to assume
>> that the auto-negotiation process [3] is not working. It used to be
>> the case, that if auto-negotiation was not working, a crossover cable
>> would fix the problem. Does that sound like an accurate diagnosis /
>> prognosis?
>>
>> Rather than buy a new cable, I might be able to add a bit of code to
>> the kernel driver to allow for manual switching through a /sys entry
>> (if the device supports such control operations), but I thought that I
>> would ask the list for suggestions first.
>>
>> Cheers,
>>
>> Chris
>>
>> [1] atl1e driver
>>
>> 03:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit
>> Ethernet Adapter (rev b0)
>>
>> [2]
>>
>> http://old.nabble.com/Netgear-GA311-%28Realtek-8169%29-and-USRP-2-td20908796.html
>>
>> [3]
>>
>> http://en.wikipedia.org/wiki/Ethernet_crossover_cable#Automatic_crossover
>>
>