diff --git a/xCAT/postscripts/configbridge b/xCAT/postscripts/configbridge
new file mode 100755
index 000000000..7795aef80
--- /dev/null
+++ b/xCAT/postscripts/configbridge
@@ -0,0 +1,410 @@
+#!/bin/bash
+
+set -ax
+
+
+function add_br() {
+  BNAME=$1
+
+  if [[ $BRIDGE == "ovs" ]]; then
+    ovs-vsctl add-br $BNAME
+  elif [[ $BRIDGE == "linux" ]]; then
+    brctl addbr $BNAME
+  fi
+}
+function add_if() {
+  BNAME=$1
+  PORT=$2
+
+  if [[ $BRIDGE == "ovs" ]]; then
+    ovs-vsctl add-port $BNAME $PORT
+  elif [[ $BRIDGE == "linux" ]]; then
+    brctl addif $BNAME $PORT
+  fi
+}
+
+#written in bash for fewest prerequisites
+function get_def_interface {
+    #gethostbyname on `hostname` would be helpful, but since we
+    #are in bash, the best alternative is to use ping to get at it
+    #don't want to grep in /etc/hosts or presume DNS
+    #we are, however, presuming ipv4 for the moment
+    retval=$(ping -c 1 `hostname`|head -n 1|cut -d\( -f 2|cut -d\) -f 1)
+    if [ -z "$retval" -o "127.0.0.1" = "$retval" ]; then #ok, that didn't pan out, now we grab the first address that looks sane
+        #retval=`ifconfig|grep inet" " |grep -v addr:127.0.0.1|grep -v 'addr:169.254'|head -n 1|cut -d: -f 2|cut -d' ' -f 1`
+        retval=`ip -4 -oneline addr show|grep -v "127.0.0.1"|grep -v '169.254'|head -n 1|awk -F 'inet ' '{print $2}'|awk -F '/' '{print $1}'`
+    fi
+    if [ -z "$retval" ]; then 
+        echo "ERROR: Unable to reasonably guess the 'default' interface" >&2
+        exit 1
+    fi
+    #iface=`ifconfig|grep -v inet6|egrep '(Link|inet)'|grep -B1 'addr:'$retval |head -n 1|awk '{print $1}'`
+    iface=`ip -4 -oneline addr show|grep -i $retval|awk -F ':' '{print $2}'|awk -F ' ' '{print $1}'|grep -o "[^ ]\+\( \+[^ ]\+\)*"`
+    if [ -z "$iface" ]; then
+        echo "ERROR: Unable to reasonably guess the default interface" >&2
+        exit 1
+    fi
+    if $brcmd show | grep ^$iface >& /dev/null; then #
+        OIFS=$IFS
+        IFS=$'\n'
+        INMATCH=0
+        for brline in $($listbr); do
+            IFS=$OIFS
+            for port in $($listport $brline); do
+
+                if [ $port == $iface ]; then
+                    iface=$port
+                    echo "$iface"
+                    IFS=$OFIS
+                    return
+                fi
+            done
+    done
+    IFS=$OFIS
+    else 
+        echo "$iface"
+    fi
+}
+
+#before modify the configuration on ubuntu/debian, should preparse the interface file
+#By default, All nics configuration are saved into /etc/network/interfaces, it is difficult for xcat to configure nic
+#So only use source /etc/network/interfaces.d/* in "/etc/network/interfaces"
+#create files under /etc/network/interfaces.d/ for each nic, then it is similar with the readhat and sles
+function debianpreconf(){
+    #create the config sub dir
+    if [ ! -d "/etc/network/interfaces.d" ];then
+        mkdir -p "/etc/network/interfaces.d"
+    fi
+    #search xcat flag
+    XCATFLAG=`grep "#XCAT_CONFIG" /etc/network/interfaces`
+    if [ -n "$XCATFLAG" ];then
+        return
+    fi
+
+    #back up the old interface configure
+    if [ ! -e "/etc/network/interfaces.bak" ];then
+        mv /etc/network/interfaces /etc/network/interfaces.bak
+    fi
+
+    #create the new config file
+    echo "#XCAT_CONFIG" > /etc/network/interfaces
+    echo "source /etc/network/interfaces.d/*" >> /etc/network/interfaces
+
+    CONFFILE=''
+
+    #read the backfile
+    cat /etc/network/interfaces.bak | while read LINE
+    do
+        if [ ! "$LINE" ];then
+            continue
+        fi
+        FIRSTCHAR=${LINE:0:1}
+        if [ $FIRSTCHAR = '#' ];then
+            continue
+        fi
+
+        CONFTYPE=`echo $LINE | cut -d" " -f1`
+        if [ $CONFTYPE = 'auto' -o $CONFTYPE = 'allow-hotplug' ];then
+            LINE=${LINE#$CONFTYPE}
+            for NICNAME in $LINE; do
+                echo "$CONFTYPE $NICNAME" > "/etc/network/interfaces.d/$NICNAME"
+            done
+        elif [ $CONFTYPE = 'iface' -o $CONFTYPE = 'mapping' ];then
+            #find out the nic name, should think about the eth0:1
+            NICNAME=`echo $LINE | cut -d" " -f 2 | cut -d":" -f 1`
+            CONFFILE="/etc/network/interfaces.d/$NICNAME"
+            if [ ! -e $CONFFILE ];then
+                echo "auto $NICNAME" > $CONFFILE
+            fi
+
+            #write lines into the conffile
+            echo $LINE >> $CONFFILE
+        else
+            echo $LINE >> $CONFFILE
+        fi
+
+    done
+}
+
+#Type of bridge, ovs, brctl
+
+if [ "ovs" = "$1" ]; then
+
+    BRIDGE="ovs"
+    brcmd=ovs-vsctl
+
+    listbr="$brcmd list-br"
+    listport="$brcmd list-ports"
+
+elif [ "linux" = "$1" ]; then
+
+    BRIDGE="linux"
+    brcmd=brctl
+
+    listbr="$brcmd show | cut -f1 | tail -n +2 | xargs"
+    listport="$brcmd show | awk '{print $NF}' | tail -n +2"
+
+fi
+
+    NETDESC="$2"
+    # get the port for installation
+    if [ -n "$INSTALLNIC" ]; then
+        if [[ "$INSTALLNIC" = mac ]] || [[ "$INSTALLNIC" = MAC ]]; then
+            #INSPORT=`ifconfig -a|grep -v inet6| grep -i 'HWaddr '$MACADDRESS|head -n 1|awk '{print $1}'`
+            INSPORT=`ip -oneline link show|grep -i ether|grep -i $MACADDRESS|awk -F ':' '{print $2}'|grep -o "[^ ]\+\( \+[^ ]\+\)*"`
+        else
+            INSPORT=$INSTALLNIC
+        fi
+    fi
+
+    if [ -z "$NETDESC" ]; then
+        if [ -n "$INSTALLNIC" ]; then
+          NETDESC=$INSPORT:default
+        else
+            echo "Incorrect usage"
+            exit 1
+        fi
+    fi
+    if echo "$NETDESC"|grep ':'> /dev/null; then
+        PORTS=`echo "$NETDESC"|cut -d: -f 1`
+        BNAME=`echo "$NETDESC"|cut -d: -f 2`
+    else 
+        if [ -n "$INSTALLNIC" ]; then
+            PORTS=$INSPORT
+        fi
+        BNAME=$NETDESC
+    fi
+    #Still here, that means we must build a bridge
+    if [ -z "$PORTS" ]; then #No ports specified, default to whatever looks up
+        PORTS=$(get_def_interface)
+    fi
+    if [ -z "$PORTS" ]; then #This has been checked many times before in theory, check again just in case
+        exit 1
+    fi
+    #For now, we only support bridge name==network name.  This precludes
+    #the config of the same vlan number on multiple fabrics, but
+    #will cover that flexibility later if demanded (with 4k vlan ids, 
+    #I think it would be unwise to reuse them as it could confuse anyway)
+    if echo "$PORTS"|grep '@'; then #we have bonding... fun to be had
+    #To be slack, going to just support one bond for now..
+        modprobe bonding miimon=100 mode=4
+        PORTS=`echo $PORTS |sed -e 's/@/ /'`
+        ip link set bond0 up
+        for p in $PORTS; do
+            #TODO: we are only going to manage the default
+            #route for now
+            saveroutes=`ip route | grep default| grep "dev $p"|grep via|sed -e 's/dev .*//'`
+            OIFS=$IFS
+            IFS=$'\n'
+            saveip=`ip addr show dev $p scope global|grep inet|grep -v dynamic|sed -e 's/inet.//'|sed -e 's/[^ ]*$//'`
+            if [ ! -z "$saveip" ]; then
+                for line in $saveip; do 
+                    ip addr add dev bond0 $line
+                done
+            fi
+            IFS=$OIFS
+            ifenslave bond0 $p
+            if [ ! -z "$saveroutes" ]; then
+                ip route add $saveroutes
+            fi 
+        done
+        PORTS=bond0
+    fi
+    if echo "$BNAME"|egrep '^vl(an)?[0123456789]' > /dev/null; then 
+        vlan="yes"
+        TNAME=${BNAME##vl}
+        TNAME=${TNAME##an}
+        #We have a vlan... more fun
+        modprobe 8021q
+        vconfig add $PORTS $TNAME
+        vconfig set_flag $PORTS.$TNAME 2 1 #Turn on GVRP where supported
+        ip link set $PORTS.$TNAME up
+        PORTORG=$PORTS
+        PORTS=$PORTS.$TNAME
+    fi
+    #Now, $PORTS is 'the' physical device to participate in a bridge
+    #TODO: we are only going to manage the default
+    #route for now
+    add_br $BNAME
+    ip link set $BNAME up
+    saveroutes=`ip route | grep default| grep "dev $PORTS"|grep via|sed -e 's/dev .*//'`
+    OIFS=$IFS
+    IFS=$'\n'
+    saveip=`ip addr show dev $PORTS scope global|grep inet|grep -v dynamic|sed -e 's/inet.//'|sed -e 's/[^ ]*$//'`
+    #saveip=`ip addr show dev $PORTS scope global|grep inet|sed -e 's/inet.//'|sed -e 's/[^ ]*$//'`
+    if [ ! -z "$saveip" ]; then
+        for line in $saveip; do 
+            IFS=$OIFS
+            ip addr add dev $BNAME $line
+        done
+    else
+        if [ ! -z "$3" ]; then
+            ip addr add dev $BNAME $3 
+        fi
+    fi
+    add_if $BNAME $PORTS
+    if [ ! -z "$saveip" ]; then
+        OIFS=$IFS
+        IFS=$'\n'
+        for line in $saveip; do 
+            IFS=$OIFS
+            ip addr del dev $PORTS $line
+        done
+       IFS=$OIFS
+    fi
+    IFS=$OIFS
+    if [ ! -z "$saveroutes" ]; then
+        ip route add $saveroutes
+    fi
+    
+    #now save the settings into the config files so that they will be persistent among reboots
+    if [[ $OSVER = sles* ]] || [[ $OSVER = suse* ]] || [[ -f /etc/SuSE-release ]]; then
+        nwdir="/etc/sysconfig/network"
+        isSLES=1
+    elif [ -f "/etc/debian_version" ];then
+        debianpreconf
+        nwdir="/etc/network/interfaces.d"
+        isDebian=1
+        getcap /usr/bin/qemu-system-x86_64 | grep cap_net_admin
+        if [ $? ne 0 ];then
+            setcap cap_net_admin=ei /usr/bin/qemu-system-x86_64
+        fi
+    else 
+        nwdir="/etc/sysconfig/network-scripts"
+    fi 
+    
+     #write into the network configuration file
+    if [[ $isSLES -eq 1 ]]; then
+        cat >$nwdir/ifcfg-$PORTS <<EOF
+DEVICE='$PORTS'
+ONBOOT='yes'
+EOF
+      if [[ $BRIDGE = "ovs" ]] ; then
+          echo "OVS_BRIDGE='$BNAME'" >> $nwdir/ifcfg-$PORTS
+          echo "TYPE='OVSPort'" >> $nwdir/ifcfg-$PORTS
+          echo "DEVICETYPE='ovs'" >> $nwdir/ifcfg-$PORTS
+      else
+          echo "BRIDGE='$BNAME'" >> $nwdir/ifcfg-$PORTS
+      fi 
+        mac=`ip addr show dev $PORTS scope global|grep link|sed -e 's/link\/ether//'|sed -e 's/brd.*$//'|sed -e 's/[ ]*//'`
+        if [ ! -z "$mac" ]; then
+            echo "HWADDR='$mac'" >> $nwdir/ifcfg-$PORTS
+        fi
+        if [ ! -z "$vlan" ]; then
+            echo "VLAN='yes'" >> $nwdir/ifcfg-$PORTS
+        fi
+        cat >$nwdir/ifcfg-$BNAME <<EOF      
+DEVICE='$BNAME'
+ONBOOT='yes'
+PEERDNS='yes'
+DELAY='0'
+EOF
+      if [[ $BRIDGE = "ovs" ]] ; then
+          echo "TYPE='OVSBridge" >> $nwdir/ifcfg-$BNAME
+          echo "DEVICETYPE='ovs'" >> $nwdir/ifcfg-$BNAME
+      else
+          echo "TYPE='Bridge'" >> $nwdir/ifcfg-$BNAME
+      fi 
+        if [ ! -z "$3" ]; then 
+            echo "IPADDR='$3'" >> $nwdir/ifcfg-$BNAME 
+            if [ ! -z "$4" ]; then
+                echo "NETMASK='$4'" >> $nwdir/ifcfg-$BNAME
+            fi
+        else
+            if [[ $BRIDGE = "ovs" ]] ; then
+                echo "OVSBOOTPROTO=dhcp" >> $nwdir/ifcfg-$BNAME
+            else
+                echo "BOOTPROTO=dhcp" >> $nwdir/ifcfg-$BNAME
+            fi
+        fi
+    elif [ $isDebian ];then
+        #ubuntu/debian
+        [[ $BRIDGE = "ovs" ]] && echo "allow-$BNAME $PORTS" >$nwdir/$PORTS
+        echo "auto $PORTS" >$nwdir/$PORTS
+        echo "iface $PORTS inet manual" >> $nwdir/$PORTS
+        if [[ $BRIDGE = "ovs" ]] ; then
+            echo "  ovs_bridge $BNAME" >> $nwdir/$PORTS
+            echo "  ovs_type OVSport" >> $nwdir/$PORTS
+            echo "  pre-up ifconfig \$IFACE up" >> $nwdir/$PORTS
+            echo "  post-down ifconfig \$IFACE down" >> $nwdir/$PORTS
+        fi
+        
+        if [ ! -z "$vlan" ];then
+            echo "  vlan-raw-device $PORTORG"
+        fi
+
+        echo "auto $BNAME" > $nwdir/$BNAME
+        [[ $BRIDGE = "ovs" ]] && echo "allow-ovs $BNAME" >> $nwdir/$BNAME
+        if [ ! -z "$3" ];then
+            echo "iface $BNAME inet static" >> $nwdir/$BNAME
+            echo "  address $3" >> $nwdir/$BNAME
+            if [ ! -z "$4" ];then
+                echo "  netmask $4" >> $nwdir/$BNAME
+            else
+                echo "  netmask 255.255.255.0" >> $nwdir/$BNAME
+            fi
+        else
+            echo "iface $BNAME inet dhcp" >> $nwdir/$BNAME
+        fi
+        if [[ $BRIDGE = "ovs" ]] ; then
+            echo "  ovs_type OVSBridge" >> $nwdir/$BNAME
+            echo "  ovs_ports $PORTS" >> $nwdir/$BNAME
+        else
+            echo "  bridge_ports $PORTS" >> $nwdir/$BNAME
+            echo "  bridge_stp off" >> $nwdir/$BNAME
+            echo "  bridge_fd 0" >> $nwdir/$BNAME
+            echo "  bridge_maxwait 0" >> $nwdir/$BNAME
+        fi
+    else
+        cat >$nwdir/ifcfg-$PORTS <<EOF
+DEVICE=$PORTS
+ONBOOT=yes
+NM_CONTROLLED=no
+EOF
+        if [[ $BRIDGE = "ovs" ]] ; then
+            echo "OVS_BRIDGE=$BNAME" >> $nwdir/ifcfg-$PORTS
+            echo "TYPE=OVSPort" >> $nwdir/ifcfg-$PORTS
+            echo "DEVICETYPE=ovs" >> $nwdir/ifcfg-$PORTS
+        else
+            echo "BRIDGE=$BNAME" >> $nwdir/ifcfg-$PORTS
+        fi
+        mac=`ip addr show dev $PORTS scope global|grep link|sed -e 's/link\/ether//'|sed -e 's/brd.*$//'|sed -e 's/[ ]*//'`
+        if [ ! -z "$mac" ]; then
+            echo "HWADDR=$mac" >> $nwdir/ifcfg-$PORTS
+        fi
+        if [ ! -z "$vlan" ]; then
+            echo "VLAN=yes" >> $nwdir/ifcfg-$PORTS
+        fi
+        cat >$nwdir/ifcfg-$BNAME <<EOF      
+DEVICE=$BNAME
+ONBOOT=yes
+PEERDNS=yes
+DELAY=0
+NM_CONTROLLED=no
+EOF
+        if [[ $BRIDGE = "ovs" ]] ; then
+            echo "TYPE=OVSBridge" >> $nwdir/ifcfg-$BNAME
+            echo "DEVICETYPE=ovs" >> $nwdir/ifcfg-$BNAME
+        else
+            echo "TYPE=Bridge" >> $nwdir/ifcfg-$BNAME
+        fi
+        if [ ! -z "$3" ]; then 
+            echo "IPADDR=$3" >> $nwdir/ifcfg-$BNAME 
+            if [ ! -z "$4" ]; then
+                echo "NETMASK=$4" >> $nwdir/ifcfg-$BNAME
+            fi
+        else
+            if [[ $BRIDGE = "ovs" ]] ; then
+                echo "OVSBOOTPROTO=dhcp" >> $nwdir/ifcfg-$BNAME
+            else
+                echo "BOOTPROTO=dhcp" >> $nwdir/ifcfg-$BNAME
+            fi
+        fi
+    fi 
+ 
+    ifup $BNAME
+
+[[ $BRIDGE = "ovs" ]] && ovs-vsctl br-set-external-id $BNAME bridge-id $BNAME
+#END bridge config.
+
+