Oracle 11 Client install per Note 819829.

Oracle 11 Client install per Note 819829.
Login as <sid>adm:
cd /oracle/client
mkdir 11x_64
chown <sid>adm:sapsys 11x_64
cd 11x_64
SAPCAR -xvf OCL11264.SAR
ln -s instantclient_11203 instantclient
cd $home
make backup copy of.dbenv* files
.dbenv_<hostname>.sh
.dbenv_<hostname>.csh
.dbenv.sh
.dbenv.csh

edit .dbenv* files and change /oracle/client/10x_64/instantclient to /oracle/client/11x_64/instantclient
    and change /10x_64 to /11x_64 where necessary.