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Topic # 96932 8-Feb-2012 00:39
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Hi All,

I just got a Linksys SRW2024 Giga managed switch.

My laptop however which has a Marvell Yukon 88E8059 Giga Lan adapter will not connect at Giga in Win7 64.

I reboot in Ubuntu and it connects in Giga just fine, so I think cable is ok.

I have updated driver from Marvell Yukon site and that did not help.

I have uninstalled and reinstalled - that did not help.

Both the router and NIC are set to Auto-Neg. Anyone able to help please?

Thanks

-Al

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Ultimate Geek
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  Reply # 578516 8-Feb-2012 07:09
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I had a similar problem a while back.  Worked in Linux but not Win7.  Was resolved by powering the PC off completely (unplug power or turn off PSU), leave for a minute and switch back on.

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  Reply # 578957 8-Feb-2012 21:40
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Do you have a properly wired up cable ?  OR a faulty one ?

Maybe swap that out and see if it makes a difference.

xpd

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  Reply # 578971 8-Feb-2012 22:02
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Yeah check your cabling - if its CAT6, then try CAT5 - some devices just dont like CAT6 (due to way pins are positioned etc)




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  Reply # 578991 8-Feb-2012 22:39
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xpd: Yeah check your cabling - if its CAT6, then try CAT5 - some devices just dont like CAT6 (due to way pins are positioned etc)


Pardon? Please explain how the pins are different between cat 5 and cat 6? They are just the type of cable. Everything is terminated in either 568A or 568B on RJ45 connectors. the 'pins' are ALWAYS the same.

Can't comment on this fault though... my guess would be the drivers but you say you have updated them. And i guess by booting in linux and seeing it connect at 1Gig rules out faulty hardware so who knows. Sounds real strange! Do you have any management on the switch? Could try forcing the port to 1Gig. But then you may get a duplex/speed mismatch and drop heaps of packets.

Edit: Read original post. You have management lol. So you might have already tried forcing it?

xpd

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  Reply # 579093 9-Feb-2012 09:03
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chevrolux:
xpd: Yeah check your cabling - if its CAT6, then try CAT5 - some devices just dont like CAT6 (due to way pins are positioned etc)


Pardon? Please explain how the pins are different between cat 5 and cat 6? They are just the type of cable. Everything is terminated in either 568A or 568B on RJ45 connectors. the 'pins' are ALWAYS the same.


Im just going by my CCNA training :) If its wrong, then I'll quite happily email the supplier of the training material and Cisco to let them know... I honestly didnt reaslise this either so was quite interested to find out.

From what I learnt,  CAT6 isnt an industry certified standard like Cat 5/5e is - most companies etc support it however hence its popularity, but apparently some older ethernet devices are very adherent to the CAT5 standard and the pins etc are a specific distance between one another, but CAT6 dosent have this adherence and the pins are sometimes slighty (probably cant see by naked eye) closer together and can cause issues - most of the time you dont see any issues, but sometimes if the cable/plug is bumped, it can cause those pins to lose connection or make a connection that it shouldnt.

All this being said, it may not be the OP's issue at all, but it is one thing to consider. Ive never come across the problem myself.

My 2c :)





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  Reply # 579230 9-Feb-2012 12:34
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If you try to fit off a cat 6 cable with cat 5 gear then yes there will be issues down the track. If the pins are so slightly different that it cant be seen by naked eye how is that going to be an issue when plugged in to a switch/router etc. I deal with cable all day every day and have done so for about 4 years now. Have NEVER had an issue with a cat 6 patch cord and old gear. I am currently studying for CCNA so would love to read where it says Cat 6 causes issues. Did you read it in the ICND books?

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  Reply # 579243 9-Feb-2012 12:50
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Havent read the books yet, just been watching CBT Nugget videos and was mentioned quite prominently in that.
Ive been dealing with networking etc for 10+years now Ive never come across it myself either . Just thought it might be worth mentioning if the OP is using CAT6 cabling etc, thats all.




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  Reply # 579259 9-Feb-2012 13:10
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Have you tried setting it to 1000mbps full duplex manually to see if that works? Should be in the advanced adapter properties somewhere.





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  Reply # 579269 9-Feb-2012 13:33
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An RJ45 is an RJ45 regardless of Cat6 or Cat5/5e cable being fitted to it. Some RJ45 manufactures for cat6 purpose use offset wire insertions in the plugs to both assist with fitting of larger diameter cat6 wire (typically 23gauge as opposed to CAt5e 24gauge) and to assist with NEXT issues as the wire entres the RJ45 body, but as for the specification of the spacing and location of the RJ45 plug pins, they are the same regardless.

As for the OP, the fact that the NIC works in GigE with Linux running but not Win7 (look mum no changing connectors) indicates a driver issue.

Cheers
Cyril

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  Reply # 579301 9-Feb-2012 14:46
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xpd:
Im just going by my CCNA training :) If its wrong, then I'll quite happily email the supplier of the training material and Cisco to let them know... I honestly didnt reaslise this either so was quite interested to find out.

From what I learnt,  CAT6 isnt an industry certified standard like Cat 5/5e is - most companies etc support it however hence its popularity, but apparently some older ethernet devices are very adherent to the CAT5 standard and the pins etc are a specific distance between one another, but CAT6 dosent have this adherence and the pins are sometimes slighty (probably cant see by naked eye) closer together and can cause issues - most of the time you dont see any issues, but sometimes if the cable/plug is bumped, it can cause those pins to lose connection or make a connection that it shouldnt.


Wow I would expect much more from Cisco training, sounds like they are trying to oversimplify cabling stuff because network techs assume that someone else looks after that.

Cat 5 is obsolete in the latest standard, which now jumps from Cat 3 up to Cat5e, but TIA/EIA-568-C Category 6 (ISO/IEC 11801 Class E) cabling is definitely industry standard. Cat5e is the minimum standard for Gigabit, but Cat 6 is often used because its higher performance gives more headroom. Cat 7 is used for the same reason with 10Gig applications.

Patch cords should be interchangeable but the cabling itself generally uses 24-guage wire instead of the 26-guage common with Cat5e, so Cisco might have been recommending not to punch the thinner Cat5e wires into Cat6 terminations behind the outlet?

Is your laptop patched directly to the switch? Just to eliminate possible cabling issues since Gigabit usually requires all 4 pairs. Is your windows system falling back to 100 meg?




Qualified in business, certified in fibre, stuck in copper, have to keep going  ^_^

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  Reply # 579315 9-Feb-2012 15:43
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Zeon: Have you tried setting it to 1000mbps full duplex manually to see if that works? Should be in the advanced adapter properties somewhere.


This would be my guess too.  And the first thing I would look at.

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  Reply # 579754 10-Feb-2012 13:48
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Gigabit is designed to work with autonegotiate, so i wouldn't think that would be the problem. I'd first try a nice new cable (5e or 6, doesn't really matter) between the switch and the PC.

Cat7 is redundant these days, as Cat6a allows 10gig over 100m. Note that Cat6e is just marketing rubish and isn't actually a standard (they're just playing on people's knowledge of cat5e).

Matt.

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  Reply # 579762 10-Feb-2012 13:53
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I still dont understand the comments regarding a new cable, the OP has stated the same pc connected via the same cable (ie no hardware or physical change) but booted on linux works, but when booted on W7 does not, as I said before, very likely a driver issue. As Zeon has said locking the W7 interface setup in GigE might help force the status.

Cyril

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  Reply # 579772 10-Feb-2012 14:03
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Autoneg is mandatory for gigabit, but if you do want to try manually configuring it make sure you do it on both sides. You shouldn't leave one side on autoneg when the other is manual.

Yes, it's likely a driver issue, but maybe the windows driver is detecting a 'faulty' cable when the linux one doesn't.


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  Reply # 579777 10-Feb-2012 14:08
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Yeah sounds like a driver issue imo.

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