Windows 2008 TCP auto tuning issue warning

[technome]

You may run into this....
I have a mixed network of a few Windows 2000 servers and one Windows 2008 server. With the default install, Windows 2008 has Receive Window Auto-Tuning enabled. This created MAJOR network browsing issue on the client's network, such as inability to browse, disappearing drive mapping, drive mappings changing from a complete drive to a single directory, inability to map a drive except by command line, machines disappearing permanently in a browse window. On the Windows 2000 servers, the console desktops would freeze consistently for hours, TS remote connection froze, though the servers functioned for all background services (thankfully). Rebooting all servers involved had no affect.

Had to disable it with the following command....

netsh interface tcp set global autotuning=disabled

The 2008 server involved has a Broadcom network interface (regretfully), which may be part of the issue.



........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm

 

[58sniper]

What's running on the 2008 box? There's a known issue with SNP especially with Broadcom cards.

Pat Richard
Microsoft Exchange MVP
Contributing author Microsoft Exchange Server 2007: The Complete Reference

 

[technome]

Last lines of my post did not get pasted, sorry about that, the issues totally resolved after disabling the auto tuning

The 2008 server is mean and clean...

Except for the Broadcrap NNI (Nearly (a) Network Interface).... sure wish Dell used CSA Intel on this 2900III
No issues as to SNP, drivers is stable, fast

This is a AD Domain controller, running Symantec 10.2 client,DHCP,DNS, File services, Label Traxx (database), not much else. No crap software added

Could be the above mention NNI mention above, as Broadcom may not have finished the last few hundred lines of code for auto tuning <grin> or the fact the Windows 2000 OS is almost prehistoric and would be on Cortisone, if a living entity.

Anyway, disabling it has not lowered the network speed, I do not download or cruise the Internet from the server, so no great loss for Internet download speeds.

Thank for the reply

........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm

 

[technome]

Update....
The system was stable for a few days until all users were switched over to the Win2008 for file access; just 40 users, very light access to the 2008 server.

Disabled the Broadcom, installed an Intel pro1000 MT as the other servers have, now everything runs the way it should.

........................................
Chernobyl disaster..a must see pictorial

http://www.kiddofspeed.com/default.htm