diff -up nfs-utils-1.2.1/utils/mount/configfile.c.orig nfs-utils-1.2.1/utils/mount/configfile.c
--- nfs-utils-1.2.1/utils/mount/configfile.c.orig	2010-01-21 05:20:04.257284410 -0500
+++ nfs-utils-1.2.1/utils/mount/configfile.c	2010-01-21 05:20:49.616131234 -0500
@@ -222,6 +222,12 @@ int inline check_vers(char *mopt, char *
 
 unsigned long config_default_vers;
 unsigned long config_default_proto;
+#ifdef IPV6_SUPPORTED
+sa_family_t	config_default_family = AF_UNSPEC;
+#else
+sa_family_t	config_default_family = AF_INET;
+#endif
+
 /*
  * Check to see if a default value is being set.
  * If so, set the appropriate global value which will 
@@ -243,6 +249,12 @@ int inline default_value(char *mopt)
 				xlog_warn("Unable to set default protocol : %s", 
 					strerror(errno));
 			}
+#ifdef IPV6_SUPPORTED
+			if (!nfs_nfs_proto_family(options, &config_default_family)) {
+				xlog_warn("Unable to set default family : %s", 
+					strerror(errno));
+			}
+#endif
 		} else {
 			xlog_warn("Unable to alloc memory for default protocol");
 		}
diff -up nfs-utils-1.2.1/utils/mount/network.c.orig nfs-utils-1.2.1/utils/mount/network.c
--- nfs-utils-1.2.1/utils/mount/network.c.orig	2010-01-21 05:20:04.252304404 -0500
+++ nfs-utils-1.2.1/utils/mount/network.c	2010-01-21 05:20:49.617183039 -0500
@@ -54,6 +54,16 @@
 #include "network.h"
 #include "conffile.h"
 
+#ifdef MOUNT_CONFIG
+extern sa_family_t config_default_family;
+#else
+#ifdef IPV6_SUPPORTED
+sa_family_t	config_default_family = AF_UNSPEC;
+#else
+sa_family_t	config_default_family = AF_INET;
+#endif
+#endif
+
 #define PMAP_TIMEOUT	(10)
 #define CONNECT_TIMEOUT	(20)
 #define MOUNT_TIMEOUT	(30)
@@ -1342,12 +1352,7 @@ int nfs_nfs_proto_family(struct mount_op
 	unsigned long protocol;
 	char *option;
 
-#ifdef IPV6_SUPPORTED
-	*family = AF_UNSPEC;
-#else
-	*family = AF_INET;
-#endif
-
+	*family = config_default_family;
 	switch (po_rightmost(options, nfs_transport_opttbl)) {
 	case 0:	/* udp */
 		return 1;
@@ -1489,11 +1494,7 @@ int nfs_mount_proto_family(struct mount_
 	unsigned long protocol;
 	char *option;
 
-#ifdef HAVE_LIBTIRPC
-	*family = AF_UNSPEC;
-#else
-	*family = AF_INET;
-#endif
+	*family = config_default_family;
 
 	option = po_get(options, "mountproto");
 	if (option != NULL)