Gigabit ethernet - slow transfer between two gigabit connections

[zerogear]

Here is the deal, I recently bought a WRT600N v1.1 and flashed the firmware to DD-WRT. I can connect to both computers fine, and both is auto-negotiated to 1Gbps, even the router showed orange indicating a gigabit connection.

Now comes the trouble, I transferred 1.5GB file from one PC to my WHS, and it maxes at around 8MB/s going perhaps up to 9.25MB/s at most. Is there any settings that I need to take into consideration for Vista x64 when I am switching to a Gigabit network?

Also, I'm not sure about my cable, It may or may not be CAT5e, but if it was CAT5, would it still sync at 1Gbps, wouldn't it auto-negotiate down to 100Mbps if the cable didn't allow the throughoutput?

Any insights into my slow transfer rate would be great. thanks.

 

[ScottMac]

Did you terminate the cable yourself? or was it purchased?

Is the cable in good shape? no exposed pair? the sheath is not pulled from the connector?

Any kinks, stretches, knots, twists, sharp bends, crushes, animal whiz, teeth marks (etc.)?

 

[zerogear]

Cables were purchase, they're all in good shape, no nicks/dents, etc. Though, these cables I am using are flat network cables, I'm tempted to just buy some CAT6 from monoprice and see.

 

[JackMDS]

Changing from Cat5e to Cat6 would not make any difference.

A good Giga switch and optimizing the computers TCP/IP would.

An inexpensive Giga switch with Jumbo frames, http://www.newegg.com/Product/...x?Item=N82E16833129025


Check your Internet bandwidth at the default MTU (DSL 1492 or Cable 1500), then increase the MTU to 9000 and see how it is effecting Internet Speed, and LAN traffic (it usually does very little to local peer-to-peer traffic).

If it is No good roll it back, and No harm done.

What is probably more beneficial is changing the RCwin to a much larger number.

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Use TCP Optimizer to optimize the TCP/IP stack of the computers according to the type and speed of the Internet connection.

http://www.speedguide.net/downloads.php

For 100Mb/sec. system use the recommended RCWin

For Giga Network double the recommended size of the RCWin.

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Please Note that on a Peer-to-peer with Client OS' the best that you can get is about 50MB/sec. local transfer.

 

[zerogear]

Thanks, I actually have it solved now that I had more time to run some more copy tests. My gigabit network does indeed run at the regular speed, seems that its my multidrive WHS which is the limiter. When I write to it I get around 33-38MB/s. When I read/write to my laptop (wired), I get around 60-70MB/s. Only when I read from WHS, I am getting 7-10MB/s. So it seems like its limited by WHS. Thanks for all the help guys

 

[WiseOldDude]

Originally posted by: zerogear
Cables were purchase, they're all in good shape, no nicks/dents, etc. Though, these cables I am using are flat network cables, I'm tempted to just buy some CAT6 from monoprice and see.

I'd be a bit suspicious of 'flat' cables for Gig, it messes up the geometry of the cable and possible crosstalk.

 

[zerogear]

They came with my buffalo routers, but generally I've never had too much trouble with them

 

[JackMDS]

These are cheappos that come free with many Modems and Routers.

They meant to be use between the Modem and the Router's WAN port.

I.e., short distance, and "Speed" that is up to ~ 20Mb/sec.