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02.18.2008 at 05:38PM PST, ID: 23173128
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6.4

Slow Throughput Through Network

Asked by thetimp in MS Forefront-ISA, Network Cards & Adapters, Network Switches & Hubs

Tags: , ,

My Local LAN has gradually slowed to almost a halt.

Browsing shares on machines is slow, but resolves; copying files accross the network is lucky to get to 20KB/s, and files are failing to copy giving "Resource Unavailable" errors: "The Specified Network name is No Longer Available".

The File Server (DHCP/ WINS/ Fileserver/ DBserver)  is Windows 2003 R2 and is connected to the internet by an ISA Server on Windows 2003.
Internet from the ISA Server is nice and quick(800KB/s Downloads form ISP).

The Client machines are XP SP2 and Vista.

Everything has the latest patches.

The Hardware is either brand new or worst case 18 months old.

The switches are new Gigabit units, everything is hardwired - no wireless.

I dont have a local DNS Server, I point individual clients to the ISP's DNS vis DHCP (on the file server).

I have disabled the cache in the ISA server.

I have "Tweaked the MTU" on the LAN, (Size, Detect and Discovery) and updated the registry on the client machines accordingly.

I have tested disabling the client machines local firewalls.

Nothing i have done has made a difference.


Does anyone have any ideas on how to improve the LAN throughput?


thanks

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About this solution

Zones: MS Forefront-ISA, Network Cards & Adapters, Network Switches & Hubs
Tags: Microsoft, ISA Server, 2006
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Solution Provided By: lrmoore
Participating Experts: 2
Solution Grade: B
 
 
[+][-]02.20.2008 at 09:47PM PST, ID: 20945298

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