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Description of problem:

Until Windows 2012 there was no LRO (large receive offload) feature in Windows.

It was introduced on Windows 2012:
http://technet.microsoft.com/en-us/library/hh997024.aspx


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

It is need by Product Type :LAN (server) Test

http://git.engineering.redhat.com/?p=users/yvugenfi/internal-kvm-guest-drivers-windows/.git;a=commit;h=20ec5739c9e84010e3f839e5c023c37535c96eb4

And

http://git.engineering.redhat.com/?p=users/yvugenfi/internal-kvm-guest-drivers-windows/.git;a=commit;h=a54ff818f7dc4ce122e8675be388cf8f9fafb447

RSC (GRO in Linux terms) supported in virtio-win build-57 means tso supported on tap device, from RSC testing results on 2012. We can see
significant improvement on RX (guest) throughout as expect.
  - For 1 RX session, about ~70% improvement.
  - For 2 RX sessions, about ~170% improvement.
  - For 4/8 RX sessions, about ~200% improvement.
Detail results can be found in attachment.
1. Win2012.64.netperf_win.netperf_exe.best_registry_setting.html. 
2. Win2012.64.netperf_win.netperf_exe.default_setting.html

Created attachment 733498 [details]
test results with virtio-win-build-57 on 2012 guest under default setting

Created attachment 733499 [details]
test results with virtio-win-build-57 on 2012 guest under best registry setting

*** Bug 807138 has been marked as a duplicate of this bug. ***

Based on comment #4 ,This issue has been fixed ald

Move Status to VERIFIED

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1729.html