diff -ruN ppp-2.4.2/pppd/options.c ppp-2.4.2-minunit/pppd/options.c
--- ppp-2.4.2/pppd/options.c	2004-02-23 15:10:48.000000000 +0200
+++ ppp-2.4.2-minunit/pppd/options.c	2004-04-02 20:56:20.000000000 +0300
@@ -103,6 +103,7 @@
 bool	tune_kernel;		/* may alter kernel settings */
 int	connect_delay = 1000;	/* wait this many ms after connect script */
 int	req_unit = -1;		/* requested interface unit */
+int	req_minunit = -1;	/* requested minimal interface unit */
 bool	multilink = 0;		/* Enable multilink operation */
 char	*bundle_name = NULL;	/* bundle name for multilink */
 bool	dump_options;		/* print out option values */
@@ -260,6 +261,9 @@
     { "unit", o_int, &req_unit,
       "PPP interface unit number to use if possible",
       OPT_PRIO | OPT_LLIMIT, 0, 0 },
+    { "minunit", o_int, &req_minunit,
+      "PPP interface minimal unit number",
+      OPT_PRIO | OPT_LLIMIT, 0, 0 },
 
     { "dump", o_bool, &dump_options,
       "Print out option values after parsing all options", 1 },
diff -ruN ppp-2.4.2/pppd/pppd.8 ppp-2.4.2-minunit/pppd/pppd.8
--- ppp-2.4.2/pppd/pppd.8	2004-02-23 15:10:48.000000000 +0200
+++ ppp-2.4.2-minunit/pppd/pppd.8	2004-04-02 20:54:41.000000000 +0300
@@ -1010,6 +1010,9 @@
 Sets the ppp unit number (for a ppp0 or ppp1 etc interface name) for outbound
 connections.
 .TP
+.B minunit \fInum
+Such as unit, but always select bigger interface
+.TP
 .B updetach
 With this option, pppd will detach from its controlling terminal once
 it has successfully established the ppp connection (to the point where
diff -ruN ppp-2.4.2/pppd/pppd.h ppp-2.4.2-minunit/pppd/pppd.h
--- ppp-2.4.2/pppd/pppd.h	2003-04-15 12:53:44.000000000 +0300
+++ ppp-2.4.2-minunit/pppd/pppd.h	2004-04-02 20:55:41.000000000 +0300
@@ -80,6 +80,7 @@
 #define MAXARGS		1	/* max # args to a command */
 #define MAXNAMELEN	256	/* max length of hostname or name for auth */
 #define MAXSECRETLEN	256	/* max length of password or secret */
+#define MAXUNIT		255	/* max ppp interface */
 
 /*
  * Option descriptor structure.
@@ -304,6 +305,7 @@
 extern int	connect_delay;	/* Time to delay after connect script */
 extern int	max_data_rate;	/* max bytes/sec through charshunt */
 extern int	req_unit;	/* interface unit number to use */
+extern int	req_minunit;	/* interface minimal unit number to use */
 extern bool	multilink;	/* enable multilink operation */
 extern bool	noendpoint;	/* don't send or accept endpt. discrim. */
 extern char	*bundle_name;	/* bundle name for multilink */
diff -ruN ppp-2.4.2/pppd/sys-linux.c ppp-2.4.2-minunit/pppd/sys-linux.c
--- ppp-2.4.2/pppd/sys-linux.c	2004-02-23 15:10:49.000000000 +0200
+++ ppp-2.4.2-minunit/pppd/sys-linux.c	2004-04-02 21:07:01.000000000 +0300
@@ -638,13 +638,26 @@
 	    || fcntl(ppp_dev_fd, F_SETFL, flags | O_NONBLOCK) == -1)
 		warn("Couldn't set /dev/ppp to nonblock: %m");
 
-	ifunit = req_unit;
-	x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
-	if (x < 0 && req_unit >= 0 && errno == EEXIST) {
+	if (req_minunit > -1) {
+	    for(ifunit = req_minunit;req_minunit < MAXUNIT; ifunit = ++req_minunit) {
+		x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+		if (x < 0 && errno == EEXIST) {
+		    warn("Couldn't allocate PPP unit %d as it is already in use try to attempt next", req_minunit);
+		}
+		if (x >= 0)
+		    break;
+	    }
+	}
+	if ((x < 0) || (req_minunit == -1)) {
+	    ifunit = req_unit;
+	    x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+	    if (x < 0 && req_unit >= 0 && errno == EEXIST) {
 		warn("Couldn't allocate PPP unit %d as it is already in use", req_unit);
 		ifunit = -1;
 		x = ioctl(ppp_dev_fd, PPPIOCNEWUNIT, &ifunit);
+	    }
 	}
+
 	if (x < 0)
 		error("Couldn't create new ppp unit: %m");
 	return x;
--- ppp-2.4.2/pppd/pppd.8.orig	2006-07-22 23:34:00 +0600
+++ ppp-2.4.2/pppd/pppd.8	2006-07-22 23:42:34 +0600
@@ -1010,6 +1010,9 @@
 Sets the ppp unit number (for a ppp0 or ppp1 etc interface name) for outbound
 connections.
 .TP
+.B minunit \fInum
+PPP interface minimal unit number. Such as unit, but always select bigger interface
+.TP
 .B updetach
 With this option, pppd will detach from its controlling terminal once
 it has successfully established the ppp connection (to the point where