Windows 7 + WAAS

[mbennett]

Hi,

I'm having some odd speed issues with New Jersey based Windows 7 clients accessing Win 2008 R2 based shares in London. I've upgraded the interveening WAAS components to 4.1.7b but seeing no improvement. Windows XP clients doing the same thing work fine...

Have looked into all the settings I can on Win 7 for CTCP, Chimney's, Auto-tuning, receive side scaling and none of them make any great difference.

The problem can seen when browsing file shares, copying files around and opening files in Office 2010. Apparently PDF files work ok... but I'm taking that peice of information with a big pinch of salt...

Any help would be great as I'm at a dead end at the moment.

Regards,

Marc

[Bhavin Yadav]

Hi Marc,

One thing that we would like to try is - disabling cifs and see if it improves the speed. you can disable the cifs ao on one side wae or you can create a policy to bypass cifs ao for your test connection, whichever way is fine.

Please let us know how it goes.

It may be this one:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCth80229&from=summary

Regards.

[mbennett]

Hi Bhavin,

I've tested this out on my model office setup using a 500K visio file being saved from a Win 7 client back to a Win 2008 R2 server file share. The model office set up includes a latency injector which is replicating the delay we expect to occur from our New Jersey office to our London data centre (80ms). We use WCCP redirection for the traffic on both sides.

So far I've seen the following:

1. a visible decease in save time on the client with CIFS acceleration disabled (10 seconds versus 20 seconds).
2. background file save traffic still rattles on for a total of 16 seconds versus 40 seconds when CIFS acc was enabled.
3. a halving in total packet count between the client and server with CIFS acc disabled.
4. a distinct increase in throughput between the client and server with CIFS acc disabled.
5. both packet traces show a large number of IP Bad Checksums, TCP Duplicate ACKs and TCP ACKed lost segments.

I will repeat the testing using our standard Win XP build. We need to provide CIFS acceleration to XP while we roll-out Win 7.

Regards,

Marc