09-01-2016, 06:05 AM
(09-01-2016, 05:16 AM)MarkHaysHarris777 Wrote: You are apparently not aware of cross-talk. I suggest you read up on it, because it dramatically affects this particular hardware problem.
Seriously? You're saying that the very reason that ethernet cables are in twisted pairs (i.e. to PREVENT crosstalk) has some connection with the GbE issues pine64 users are experiencing? And whilst I may not have read every single post on the GbE thread as I'm only following it out of interest, not for a need to fix the issue, I haven't seen any evidence that would suggest that length is an issue. Earlier in this thread, the second poster indicated that this was not the case in relation to his issue, as neither long nor short Cat6 cables made any different.
In fact, a longer cable was more reliable in one instance, but there was the suggestion that it was a Cat5/100T cable (and more crosstalk would have been expected, but it still worked fine). Everything I have seen to date points to auto-negotiation. Which is why tkasier kept asking for consist, repeatable, hard data, so that all the false flags could be eliminated. For instance, if we can start identifying that there really are different NIC chips used on certain boards. That some made it past QC with poor solder joints. Or that the Pine64s GbE is not compatible with certain chipset GbE networks due to a hardware clash (which could be the fault of either device). Or a power issue. Or a register configuration. Or a combination of any?!