Why is the MGT with GT11_MODE="B" not working correctly in VHDL simulation?
This problem is scheduled to be resolved in 7.1i Service Pack 3, scheduled for release in July 2005.
Prior to the release of this service pack, please install the following patch and access the readme file with instructions in the archive.
PC
http://www.xilinx.com/txpatches/pub/swhelp/ise7_updates/cr206693.zip
Linux / UNIX
http://www.xilinx.com/txpatches/pub/swhelp/ise7_updates/cr206693.tar.gz