diff --git a/xCAT-server/lib/xcat/plugins/anaconda.pm b/xCAT-server/lib/xcat/plugins/anaconda.pm
index 7a434f962..2253c8adf 100644
--- a/xCAT-server/lib/xcat/plugins/anaconda.pm
+++ b/xCAT-server/lib/xcat/plugins/anaconda.pm
@@ -1103,7 +1103,7 @@ sub mkinstall
 	    	$instserver=$ent->{nfsserver};
 	    }
             my $kcmdline =
-                "instserver=$instserver ks=http://"
+                "repo=http://$instserver/install/$os/$arch/ ks=http://"
               . $instserver
               . "/install/autoinst/"
               . $node;
@@ -1180,7 +1180,7 @@ sub mkinstall
                     $kcmdline .= "n8r";
                 }
             }
-            $kcmdline .= " noipv6";
+            #$kcmdline .= " noipv6";
             # add the addkcmdline attribute  to the end
             # of the command, if it exists
             #my $addkcmd   = $addkcmdhash->{$node}->[0];
diff --git a/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl b/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
index 9ffa7b55b..1f0523000 100644
--- a/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
+++ b/xCAT-server/share/xcat/install/rh/compute.rhels6.tmpl
@@ -8,7 +8,7 @@ lang en_US
 # nfs --server hostname.of.server or IP --dir /path/to/RH/CD/image
 #
 #nfs --server #XCATVAR:INSTALL_NFS# --dir #XCATVAR:INSTALL_SRC_DIR#
-url --url http://#TABLE:noderes:$NODE:nfsserver#/install/#TABLE:nodetype:$NODE:os#/#TABLE:nodetype:$NODE:arch#
+%include /tmp/installurl
 
 #device ethernet e100
 keyboard "us"
diff --git a/xCAT-server/share/xcat/install/scripts/pre.rh b/xCAT-server/share/xcat/install/scripts/pre.rh
index ae28e93a4..c329496d3 100644
--- a/xCAT-server/share/xcat/install/scripts/pre.rh
+++ b/xCAT-server/share/xcat/install/scripts/pre.rh
@@ -137,6 +137,9 @@ fi
 if [ -d /sys/firmware/efi ]; then 
 	echo 'part /boot/efi --size 50 --fstype vfat' >> /tmp/partitioning
 fi
+INSTSERVER=`sed -e 's/.*instserver=.*//' -e 's/ .*//' /proc/cmdline`
+echo "url --url http://$INSTSERVER/"'install/#TABLE:nodetype:$NODE:os#/#TABLE:nodetype:$NODE:arch#' > /tmp/installurl
+
 #TODO: ondisk detection, /dev/disk/by-id/edd-int13_dev80 for legacy maybe, and no idea about efi.  at least maybe blacklist SAN if mptsas/mpt2sas/megaraid_sas seen...
 echo "part swap --size 1024" >> /tmp/partitioning
 echo "part / --size 1 --grow --fstype $FSTYPE" >> /tmp/partitioning