Guys

My laptop is an Asus N73S
Its got an Atheros AR8151 gigabit network controller.

Now it used to be ok, but at some point in time it developed network issues.
The driver seems to be the most up to date I can find - version 2.0.12.13

One thing I simply cannot do in a timely manner any more is copy largish files from my machine to a server in our domain.

For example a 300Mb file states that it'll be approx 16 hours to copy
On the other hand, that same 300Mb file will copy TO my laptop from that same server in seconds.

 

windows 7 uses new registry key named Dynamicsendbuffer disable.
Open regedit
HKLM\SYSTEM\CurrentControlSet\Services\AFD\Paramet ers\DynamicSendBufferDisable (DWORD)
Setting it to zero forces winsock to use larger buffers..

 

What is the connection speed? When I have this issue it has usually been dodgy cable connecting at 10 rather than 1000Mbps. Sorry, missed the fast file copy to your laptop.

 

I have also seen this when the nic is set to auto negotiate to get speed and duplex setting

 

Doesn't seem to exist.

Windows 7 professional - 64bit by the way.

 

create it mate.

 

find your old drivers for the network controller, Ive had issues when a update has happened and the new driver has caused a few issues.

 

Wndow generic drivers or laptop specific?

 

OK - will try that

Specific drivers

Presumably from original media - now where did I put that

 

Is it plugged into a switch? Like mentioned earlier it could be that the port is set to auto negotiate and has negotiated at the wrong speed/duplex leading to high collision rates.

If its a managed switch sign onto it and see what speed it has negotiated at and check the error logs for high collision rates.

 

It is plugged into a socket on the wall which goes to the panel and then to a switch, and the stats say its on 1Gbps

 

OK - found original media
Installed old driver - no difference, so what does that mean then - Windows issue.

 

The stats where?

The PC or the switch or both?

 

Within windows - local area connection status

Also - if I trace num port from the panel to the switch, its lights would also indicate the higher speed

 

Also disable IPV6 and use V4 they really don't play well together contrary to what Microsoft says, use one or the other.

 

1) Try setting the speed and duplex on the nic by hand in the driver settings through device manager and see if it makes any difference. Start low and build up, see if it helps.

2) Nic might be fried and not working at 1Gbps any more. I've had this on an old PC, luckily the mobo had dual nics, so I popped it in the other one and it worked fine.

3) Could also be a cable problem, have you ruled that out with another machine on the same rj45 or by plugging it directly into the switch with a cable you know is working?

Try those and let me know how you get on.

J

 

Cheers, I will try those

IPV6 - no difference.

 

Registry in 64 bit windows is a funny old thing - you need to locate a folder called syswow64, right click the regedit application and run it as admin.

worth checking the MTU (maximum transmission unit) size for the interface;

From an elevated command prompt - type

netsh interface ipv4 show subinterfaces

The MTU size appears in the first column if this is set to 1500 or above try the following (assuming your newtork connection is called Local Area Connection)

netsh interface ipv4 set subinterface "Local Area Connection" mtu=1360 store=persistent

You may be encountering packet fragmentation and increased numbers of retrys. Although 300Mb taking 16 hours, works out at around 56kbps.

If this improves things, let me know, I can take you through optimising your MTU sizing.

Is the server on the same network segment as your machine ie no routers involved?

 

Yep - server on same segment

All the numbers are 1500 except a loopback pseudo interface which is 4294967295?

I was able to just run regedit via start/run