diff --git a/xCAT-server/share/xcat/install/scripts/chroot.sles b/xCAT-server/share/xcat/install/scripts/chroot.sles
index 9b258d5d3..dbcabf594 100644
--- a/xCAT-server/share/xcat/install/scripts/chroot.sles
+++ b/xCAT-server/share/xcat/install/scripts/chroot.sles
@@ -37,6 +37,29 @@ EOF
 
 chmod 755 /tmp/updateflag.awk
 /tmp/updateflag.awk
+export PRINIC=#TABLEBLANKOKAY:noderes:THISNODE:primarynic#
+if [ "$PRINIC" == "mac" ]
+then
+    export PRINIC='#TABLE:mac:THISNODE:mac#'
+fi
+if [ -z "$PRINIC" ]
+then
+    for karg in $(cat /proc/cmdline |sed -e 's/-/:/g' -e 's/ /\n/g'); do
+        if  [ "${karg%%=*}" = "BOOTIF" ]; then
+            export PRINIC=`ifconfig -a|grep -i "hwaddr ${karg#*=01:}"|awk '{print $1}'`
+        fi
+    done
+    if [ -z "$PRINIC" ]; then
+        export PRINIC=eth0
+    fi
+fi
+if [ -z "$PRINIC" ]
+then
+    export PRINIC=eth0
+elif [[ `echo "$PRINIC" | grep -sqE ^[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+$ ;echo $?` == "0" ]]; then
+    export PRINIC=`ifconfig -a | grep -i "HWaddr $PRINIC" | awk '{print $1}'`
+fi
+echo 'export PRINIC='"$PRINIC" > /tmp/prinicsetting
 ]]>
 
           </source>
diff --git a/xCAT-server/share/xcat/install/scripts/post.sles11 b/xCAT-server/share/xcat/install/scripts/post.sles11
index 3c0780fa7..bb13e4bb9 100644
--- a/xCAT-server/share/xcat/install/scripts/post.sles11
+++ b/xCAT-server/share/xcat/install/scripts/post.sles11
@@ -16,28 +16,8 @@ BOOTPROTO=dhcp
 STARTMODE=onboot
 EOF
 
-export PRINIC=#TABLEBLANKOKAY:noderes:THISNODE:primarynic#
-if [ "$PRINIC" == "mac" ]
-then
-    export PRINIC='#TABLE:mac:THISNODE:mac#'
-fi
-if [ -z "$PRINIC" ]
-then
-    for karg in $(cat /proc/cmdline |sed -e 's/-/:/g' -e 's/ /\n/g'); do
-        if  [ "${karg%%=*}" = "BOOTIF" ]; then
-            export PRINIC=`ifconfig -a|grep -i "hwaddr ${karg#*=01:}"|awk '{print $1}'`
-        fi
-    done
-    if [ -z "$PRINIC" ]; then
-        export PRINIC=eth0
-    fi
-fi
-if [ -z "$PRINIC" ]
-then
-    export PRINIC=eth0
-elif [[ `echo "$PRINIC" | grep -sqE ^[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+:[A-Fa-f0-9]+$ ;echo $?` == "0" ]]; then
-    export PRINIC=`ifconfig -a | grep -i "HWaddr $PRINIC" | awk '{print $1}'`
-fi
+. /tmp/prinicsetting
+rm /tmp/prinicsetting
 if [ "$PRINIC" != "eth0" ]
 then
 	cd /etc/sysconfig/network