Network seams slower after server upgrade.

After upgrading from a windows server 2003 to a 2011 sbs server with exchange. The network seams to run much slower. Programs seam to lag when opening them now. The new server has 4 times the specs of the old server. We are running one very old program on the old server so it is still hooked up. Would that be causing an issue? Nothing else in the network has been changed. There are 20 to 25 clients in the building. It is a CPA firm so they run lots of tax software.
MPATechTeamAsked:
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DMTechGrooupCommented:
Programs seem to lag.. locally installed programs that point to mapped drives or such?

Have you verified your DNS settings?

You might need to sniff out a computer and see if it is trying to do something like broadcast, etc before reverting to a direct connection..

Were you running WINS before and not now?  What type of workstations?

Were you running exchange prior to this?  Exchange loves to take all the memory if it can.
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Olaf De CeusterCommented:
How much memory does your new server have. Need more than 16GB.
Also make sure you turned off SMB signing.
Are you running any AV. If so let me know what you are using.

Re network settings:
http://blog.mpecsinc.ca/2012/01/slow-network-speeds-with-sbs-2008-and.html
Applicable for 2011 too.
Disable the second NIC also.

If still no joy:
Download and install the BPA to check your network.

http://support.microsoft.com/kb/2673284
Hope this helps,
Olaf
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MPATechTeamAuthor Commented:
Thanks for your replies. I just wanted to follow up and answer your questions:

How much memory does your new server have. Need more than 16GB.
-- It has 32GB of RAM. Is that sufficient do you feel?

Also make sure you turned off SMB signing.
-- I see that this is how I disable it:
http://support.exinda.com/topic/how-to-disable-smb-signing-on-windows-servers-to-improve-smb-performance
---- Are there any ill-effects this will have that I should be aware of prior to doing so?

Are you running any AV. If so let me know what you are using.
AVG 2013


Re network settings:
http://blog.mpecsinc.ca/2012/01/slow-network-speeds-with-sbs-2008-and.html
Applicable for 2011 too.
Disable the second NIC also.
---- We have completed changing the NIC binding order as per your recommendation. It does seem to have helped but we are always look for further improvements.

Sounds like we need to try disabling SMB Signing next?
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MPATechTeamAuthor Commented:
Hi there,

I just wanted to update everyone and let you know that the issue turned out to be Exchange 2010 consuming too much memory. This typically happens when the SBS 2011 server is also running a SQL DB.

We limited the amount of memory Exchange could consume and this appears to have solved our issues.
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MPATechTeamAuthor Commented:
Other comments were helpful but this was ultimately the problem.
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