Superhub Ethernet ports don't auto negotiate to 1Gbit correctly

dbateman2k5 · 10-01-2012, 01:55

Hi.

Got a new PC at end of 2011, which has a GBE onboard NIC, which kept failing to auto negotiate to 1Gbit and hence refused to connect. Read that this is a known fault with the onboard NIC (Realtek GBE).

Bought an Intel Pro/1000 PCI-e Gbit NIC, which did sometimes connect at 1Gbit.

This proved to me that the SuperHub was therefore not auto negotiating to 1Gbit sppeds on it's ethernet ports.

I have since put the SuperHub into Modem Only mode and connected my Linksys WRT160N router.

The Intel NIC now correctly auto negotuates with the Linksys and so sets itself to 100Mbit, which is maximum supported speed on the Linksys' ethernet ports.

Wonder when the SuperHub's 1Gbit ethernet ports are going to work correctly at 1Gbit.

This has also happened to two of my firend's superhubs, and hence they had to go to same setup.

AndyCalling · 10-01-2012, 02:17

It works fine every time on my NVIDIA nic and my Iomega NAS which I believe has a Realtek nic in it. Are you sure you are using working cat 5e or cat 6 Ethernet cables?

dbateman2k5 · 10-01-2012, 04:53

Yes. I'm using a brand new 5m Cat5e cable between the router and PC.

Sirius · 10-01-2012, 06:43

Working fine at 1 Gbit everytime from my Broadcom Corporation NC7770 Gigabit card in my clearOS router to my Shub using cat 6 cables.

Andrewcrawford23 · 10-01-2012, 07:38

try cat6 altohugh cat5e does work at gbit there has been known issues for it not heard of issue with cat6 since it designed for gbit and 10gbit

qasdfdsaq · 10-01-2012, 09:34

Cat6 is not designed for 10gbit.

1Gbit is designed to work fine on cat 5, let alone 5e.

Zhadnost · 10-01-2012, 09:40

To clarify, you can run 10GbaseT over cat 6 for short distances, but you should use Cat6A cabling for normal runs.

qasdfdsaq · 10-01-2012, 09:41

Can, but it wasn't "designed for"

**Kymmy** · 10-01-2012, 09:45

Can I suggest trying a shorter patch cable to just confirm yes/no as to a cable problem.. Although the 5m cable might be cat5e that doesn't mean it's a perfect cable and might have problems. Either way it'll point you more in the right direction.

qasdfdsaq · 10-01-2012, 09:47

Was going to say myself - a lot of cheapo cable claiming to be 5e isn't, and has problems with Gbe over longer runs - though didn't mention it as I rarely see problems at the ~5m level, more often at 20-50m. Still worth a shot.

Of the many problems I've heard about the Superhub having, the Gbe ports one isn't one I see mentioned often...

**Kymmy** · 10-01-2012, 09:49

As you know it only takes a poorly crimped RJ45 or a cable that has been bent round to small a radius for it to mess up the signal capability

Andrewcrawford23 · 10-01-2012, 09:58

Quote:

Originally Posted by qasdfdsaq

Can, but it wasn't "designed for"

cat5 wasnt designed for gbit either :s but you can run it, the OP is having problem with auto negetioted the cheapist and most obvious option is replace the cable witha cable designed for that spec, 5e wasnt really designed for gbit either, and considering most people wont have cable lenght that long saying for 10gbit isnt incorrect it can happily run it but point me to commerical available 10gbit adapters that are cheap neough ie under £500 then might havea point or not meantion it but was only pointing out cat6 has far higher capicty

**Rob** · 10-01-2012, 10:47

I've seen similar problems with some netgear gigabit switches. Often solved by simply unplugging the cable from one port and connecting to another. Dunno why?

Another thing to try is seeing whether you can manually set the conection speed, in the network card's properties, rather than auto-negotiation.

kwikbreaks · 10-01-2012, 11:48

Possibly dodgy contacts? I used a short patch cable I grabbed out of a box of the things and was scratching my head mightily as to why it only ran 100Mbps. Then I looked closer at the patch lead - it was 4 wires only - probably some piece of tat that came with an ADSL router.

A single wire failure (crimp contact or break) will probably see you back on 100Mbps. If it's an intermittent fault it might work just fine on the next router/NIC pair you try. Simplest option is to repeat the testing with a different cable and by elimination determine whether it's the cable NIC or Superhub to blame. I can say that my Superhub switch worked fine at gigabit speeds - unfortunately if you ran it on fast WiFi for any length of time it borked it (pre R30).

Andrewcrawford23 · 10-01-2012, 11:57

Quote:

Originally Posted by Rob

I've seen similar problems with some netgear gigabit switches. Often solved by simply unplugging the cable from one port and connecting to another. Dunno why?

Another thing to try is seeing whether you can manually set the conection speed, in the network card's properties, rather than auto-negotiation.

although i do that it isnt advised esicallpy for non epert user, because if ther eissue then generally that is wher ehte problem will lie, i mean slow speed,s packet lost, high ping, because if it auto negetion to 100mb there a reason it doing it usually because of itnerference meaning gbit can tbe achived

---------- Post added at 11:57 ---------- Previous post was at 11:53 ----------

Quote:

Originally Posted by kwikbreaks

Possibly dodgy contacts? I used a short patch cable I grabbed out of a box of the things and was scratching my head mightily as to why it only ran 100Mbps. Then I looked closer at the patch lead - it was 4 wires only - probably some piece of tat that came with an ADSL router.

A single wire failure (crimp contact or break) will probably see you back on 100Mbps. If it's an intermittent fault it might work just fine on the next router/NIC pair you try. Simplest option is to repeat the testing with a different cable and by elimination determine whether it's the cable NIC or Superhub to blame. I can say that my Superhub switch worked fine at gigabit speeds - unfortunately if you ran it on fast WiFi for any length of time it borked it (pre R30).

99% of the time it is hte cable esicpally if the problem is gigbit not auto negetion to gbit but to 100mb, whether the cable is broken, cable crimped wrongly etc i have no idea but tha tis generally teh first afault then next would b the ethernet adapter,

the biggest problem is for the op if it the only piece of hardware they have at gbit it will be hard to rule there comptuer or the superhub out if thecbale doenst fix it, but i also suggest to the op try all the ports witha brand new cable bought out the shops they generally onylas £1 fora few metres