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

[Christopher Friedt]

I see what the issue is:

Some ATL cards incorrectly appear as "L1 Gigabit Ethernet" cards in
lspci, but they are actually the L2 adapters, which only support
10/100 Mbps networking.

That would explain a lot!

On Wed, Nov 18, 2009 at 8:56 PM, Christopher Friedt
<address@hidden> wrote:
> 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
>>>
>>
>