Patch for CentOS/RHEL 7 machines that lose their IP address

dhclient-script.patch

--- dhclient-script.orig    2015-01-28 18:29:27.253629187 +0000
+++ dhclient-script    2015-01-28 18:30:06.360597495 +0000
@@ -354,8 +354,7 @@
        [ ! "${old_broadcast_address}" = "${new_broadcast_address}" ] ||
        [ ! "${old_routers}" = "${new_routers}" ] ||
        [ ! "${old_interface_mtu}" = "${new_interface_mtu}" ]; then
-        ip -4 addr add ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} \
-           valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time} >/dev/null 2>&1
+        ip -4 addr add ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} >/dev/null 2>&1
         ip link set dev ${interface} up

         # The 576 MTU is only used for X.25 and dialup connections
@@ -484,8 +483,7 @@
         fi

     else # RENEW||REBIND - only update address lifetimes
-        ip -4 addr change ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} \
-           valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time} >/dev/null 2>&1
+        ip -4 addr change ${new_ip_address}/${new_prefix} broadcast ${new_broadcast_address} dev ${interface} >/dev/null 2>&1
     fi

     if [ ! "${new_ip_address}" = "${alias_ip_address}" ] &&
@@ -786,8 +784,7 @@
             fi

             ip -4 addr add ${new_ip_address}/${new_prefix} \
-                broadcast ${new_broadcast_address} dev ${interface} \
-                valid_lft ${new_dhcp_lease_time} preferred_lft ${new_dhcp_lease_time}
+                broadcast ${new_broadcast_address} dev ${interface}
             set ${new_routers}

             if ping -q -c 1 -w 10 -I ${interface} ${1}; then