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Gigabit LAN network problem
_sentinel 
31/8/08 8:37:15 PM
Champion

Hi all, I have a ASUS P5E3 Deluxe, which contains dual gigabit lan nics, they are a realtek and marvell yukon. Installed Vista Ultimate + latest drivers mobo + nic + ati drivers, bios etc, so basically everything is updated.
I have a manually configured LAN network with IP's in the range 10.0.0.1 through to 10.0.0.5. Now both will not connect at 1.0Gbs, only 100Mbs.
I've tried everything, manually setting both NIC's to 1.0Gbs and what not, but still no 1Gbs connection. So I'm thinking it's either a problem with the mobo itself or the drivers. Any ideas?

BTW, the cables are 3m Cat6e cables, and have been tested fine using both my server and the machine in my sig.

BTW2: I've just read the sticky'd note up top, mainly for light reading, and will try out the proper installation techniques, mine are all over the place :P


Edited by _sentinel: 31/8/2008 9:09:38 PM

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segger 
31/8/08 10:23:37 PM
Guru

What model of switch are you plugging the NICs into?

Leave everything set at autonegotiate - don't force the speed & duplex.

Try different cables also. Make sure they have all 8 wires connected and they're straight-through cables.


Edited by segger: 31/8/2008 10:24:47 PM

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_sentinel 
31/8/08 10:27:53 PM
Champion

Netgear GS105 Gigabit Switch
http://www.netgear.com/Products/Switches/DesktopSwitches/GS105.aspx?detail=Specifications
Cables are all straight through, tested with proven working cables (from the server and machine below). So can confirm no problems with the cables


Edited by _sentinel: 31/8/2008 10:29:29 PM

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segger 
31/8/08 10:30:31 PM
Guru

And you've definitely got the NIC(s) set to autonegotiate, rather than forced speed/duplex?

(check the driver setup in Windows and also poke around the BIOS in case there's anything funny in there)

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_sentinel 
31/8/08 10:42:08 PM
Champion

ATM, (I'm at work btw) one NIC, Realtek is forced, Marvell is set to autonegotiate. Will check BIOS again, though couldn't find any network settings :/

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segger 
31/8/08 10:54:32 PM
Guru

Don't force the speed if you're connecting to an unmanaged switch. In fact it shouldn't be forced at all for 1000Base-T connections. Anyway, see what happens when you get home.

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garlic 
2/9/08 2:01:07 PM
Overlord

Segger, what is your take on Cisco best practice to hard set static hosts (servers, inter device links etc..) with 1000/full in mind? Our procedure for such things specifies both ends have to be hard set, though, this may be a carry over from old 10/100 days...

I haven't read the 1000baseT standard, but it has been mentioned to me that the standard doesn't support hard setting speed / duplex, is this true?

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segger 
2/9/08 10:21:32 PM
Guru

The whole auto/forced thing can get religious, but for 1000Base-T it should always be enabled - as you mentioned, it's mandated in the 802.3ab spec so disabling it is violating this.

As far as 10/100Mbps connections go, except for environments with very specific requirements, these days it's best to leave everything on auto anyway (unless negotiation fails - which is MUCH rarer than it used to be).

The risk of the occasional autonegotiation failure requiring manual configuration is far outweighed by the risk and likelihood of someone changing the device plugged into the manually configured port and not configuring the new device (which will more than likely default to autonegotiation) to match, resulting in a duplex mismatch.

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garlic 
3/9/08 10:38:04 AM
Overlord

Cheers for you comments segger. I will have to have a read of the standard and perhaps try and change our process...

apologies for the thread hijack _sentinal

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