network performance very slow

[andykg]

Hi

running a Win2003 server with 8 clients running 2k and XP

Lately network performance has ground to a halt. Taking ages to copy files to the server share, Outlook opening slowly, taking ages to browse shares etc.

I ran performance monitor on the server looking at the network counters and noticed the total bandwidth is constantly running at 100 percent usage, this isnt right as other 2003 servers i support are running at 6 or 7.

All the PC's are up to date with anti virus and microsoft patches for blaster, nachi etc.

No one is downloading as far as i can see, no one is doing anything they shouldnt.

Internet access is through a hardware firewall so the server isnt being used for ISA.

Im getting everyone to shut down their PC's this afternoon but in the mean time I am stumped as to what to look at.

Any ideas as to what I should look at next?

thanks

 

[jrbarnett]

How full is the hard disk?

John

 

[NortonES2]

Put a network monitor on to see what the traffic is.

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If it doesn't leak oil it must be empty!!

 

[freddie33]

Are your dns settings correct on the server? The clients dns must point to the server.

 

[freddie33]

Shutdown all machines on your network accept the server. Power on the pc´s 1 at a time. then look at the network load. No problem? turn on the next. You should find your troublemaker with this method.

good luck

 

[xmsre]

the 100% utilization on the NIC is a good place to start. What is the traffic? What is connecting to the server? Netmon may help you answer these questions.

 

[andykg]

hi all thanks for the info.

Turns out one of the teamed NICS was sending out lots of collisions.

Took it out of the equation and now everything is sorted

chhers