diff -uNr net-scripts-0.3-zcip/sysconfig/network-scripts/ifup net-scripts-0.3/sysconfig/network-scripts/ifup
--- net-scripts-0.3-zcip/sysconfig/network-scripts/ifup	2004-02-13 18:11:48 +0200
+++ net-scripts-0.3/sysconfig/network-scripts/ifup	2004-02-13 18:13:30 +0200
@@ -128,10 +128,33 @@
 	is_yes "$RECEIVEONLY" && RFLAG="-r"
 
 	ifconfig "$DEVICE" down
-	echo "Enslaving $DEVICE to $MASTER"
-	"$IFENSLAVE" $RFLAG "$MASTER" "$DEVICE"
+        ifconfig $MASTER up
+ 
+        # Check, if master needs additional configuration. It is required
+        # if it should be configured via DHCP but has no slaves yet.
+        if fakeMAC "$MASTER" && ! ifconfig $MASTER | fgrep -q "inet addr"
+        then
+	    masterconf=yes
+        fi
 
-	exit 0
+	echo "Enslaving $DEVICE to $MASTER"
+        if "$IFENSLAVE" $RFLAG "$MASTER" "$DEVICE"; then
+	    # Remove unneeded routes
+            /sbin/route | awk "/$DEVICE\\$/ { print \\$1,\\$3 }" |
+            while read net mask; do
+		/sbin/route del -net $net netmask $mask dev $DEVICE
+            done
+        fi
+ 
+        # If additional configuration of master is required,
+        # continue with master configuration, assuming
+        # configuration protocol dhcp, else exit
+        if [ -n "$masterconf" ]; then
+                DEVICE=$MASTER
+                DYNCONFIG=true
+        else
+	    exit 0
+	fi    
 fi
 
 # Now, run the specific script for Wireless LAN interfaces
diff -uNr net-scripts-0.3-zcip/sysconfig/network-scripts/network-functions net-scripts-0.3/sysconfig/network-scripts/network-functions
--- net-scripts-0.3-zcip/sysconfig/network-scripts/network-functions	2003-05-20 15:46:06 +0300
+++ net-scripts-0.3/sysconfig/network-scripts/network-functions	2004-02-13 18:13:30 +0200
@@ -109,3 +109,9 @@
         fi
     fi
 }
+
+# This function reports if given device has fake (zero only) MAC address
+fakeMAC() {
+    test -z `ifconfig $1 | grep HWaddr | awk '{print $NF}' | tr -d ':0'`
+}
+