Index: cifs-utils-6.8/mount.cifs.c
===================================================================
--- cifs-utils-6.8.orig/mount.cifs.c
+++ cifs-utils-6.8/mount.cifs.c
@@ -2099,6 +2099,10 @@ mount_retry:
 		switch (errno) {
 		case ECONNREFUSED:
 		case EHOSTUNREACH:
+			if (currentaddress) {
+				fprintf(stderr, "mount error(%d): could not connect to %s",
+					errno, currentaddress);
+			}
 			currentaddress = nextaddress;
 			if (currentaddress) {
 				nextaddress = strchr(currentaddress, ',');
@@ -2110,6 +2114,12 @@ mount_retry:
 			fprintf(stderr,
 				"mount error: %s filesystem not supported by the system\n", cifs_fstype);
 			break;
+		case EHOSTDOWN:
+			fprintf(stderr,
+				"mount error: Server abruptly closed the connection.\n"
+				"This can happen if the server does not support the SMB version you are trying to use.\n"
+				"Since SLE15 the default SMB version changed from SMB1 to SMB2.1 and above. Try mounting with vers=1.0.\n");
+			break;
 		case ENXIO:
 			if (!already_uppercased &&
 			    uppercase_string(parsed_info->host) &&
@@ -2126,7 +2136,7 @@ mount_retry:
 			strerror(errno));
 		fprintf(stderr,
 			"Refer to the %s(8) manual page (e.g. man "
-			"%s)\n", thisprogram, thisprogram);
+			"%s) and kernel log messages (dmesg)\n", thisprogram, thisprogram);
 		rc = EX_FAIL;
 		goto mount_exit;
 	}
Index: cifs-utils-6.8/mount.cifs.rst
===================================================================
--- cifs-utils-6.8.orig/mount.cifs.rst
+++ cifs-utils-6.8/mount.cifs.rst
@@ -598,7 +598,7 @@ vers=arg
   Note too that while this option governs the protocol version used, not
   all features of each version are available.
 
-  The default since v4.13.5 is for the client and server to negotiate
+  The default since SLE15 is for the client and server to negotiate
   the highest possible version greater than or equal to ``2.1``. In
   kernels prior to v4.13, the default was ``1.0``. For kernels
   between v4.13 and v4.13.5 the default is ``3.0``.