--- vl.c	2006-10-07 20:20:13 +0400
+++ /usr/src/vl.c	2006-10-07 20:52:01 +0400
@@ -89,6 +89,7 @@
 #include "exec-all.h"
 
 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
+#define DEFAULT_INTERFACE_NAME "tun0"
 
 //#define DEBUG_UNUSED_IOPORT
 //#define DEBUG_IOPORT
@@ -3671,7 +3672,8 @@
             if (net_tap_fd_init(vlan, fd))
                 ret = 0;
         } else {
-            get_param_value(ifname, sizeof(ifname), "ifname", p);
+            if(get_param_value(ifname, sizeof(ifname), "ifname", p) == 0)
+		pstrcpy(ifname, sizeof(ifname), DEFAULT_INTERFACE_NAME);
             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
             }