4 files changed, 35 insertions, 18 deletions
diff --git a/doc/sync/alarm/conntrackd.conf b/doc/sync/alarm/conntrackd.conf
index 31a1a4d..dfdc91d 100644
--- a/doc/sync/alarm/conntrackd.conf
+++ b/doc/sync/alarm/conntrackd.conf
@@ -94,13 +94,14 @@ Sync {
 		# the receiver buffer.
 		#
 		# McastRcvSocketBuffer 1249280
-	}
 
-	# 
-	# Enable/Disable message checksumming. This is a good property to
-	# achieve fault-tolerance. In case of doubt, do not modify this value.
-	#
-	Checksum on
+		# 
+		# Enable/Disable message checksumming. This is a good
+		# property to achieve fault-tolerance. In case of doubt, do
+		# not modify this value.
+		#
+		Checksum on
+	}
 }
 
 #
diff --git a/doc/sync/ftfw/conntrackd.conf b/doc/sync/ftfw/conntrackd.conf
index ae2fe78..bf5711e 100644
--- a/doc/sync/ftfw/conntrackd.conf
+++ b/doc/sync/ftfw/conntrackd.conf
@@ -98,13 +98,14 @@ Sync {
 		# the receiver buffer.
 		#
 		# McastRcvSocketBuffer 1249280
-	}
 
-	# 
-	# Enable/Disable message checksumming. This is a good property to
-	# achieve fault-tolerance. In case of doubt, do not modify this value.
-	#
-	Checksum on
+		# 
+		# Enable/Disable message checksumming. This is a good
+		# property to achieve fault-tolerance. In case of doubt, do
+		# not modify this value.
+		#
+		Checksum on
+	}
 }
 
 #
diff --git a/doc/sync/notrack/conntrackd.conf b/doc/sync/notrack/conntrackd.conf
index d0e141c..90189cd 100644
--- a/doc/sync/notrack/conntrackd.conf
+++ b/doc/sync/notrack/conntrackd.conf
@@ -82,13 +82,14 @@ Sync {
 		# really recommended to increase the buffer size.
 
 		McastRcvSocketBuffer 1249280
-	}
 
-	# 
-	# Enable/Disable message checksumming. This is a good property to
-	# achieve fault-tolerance. In case of doubt, do not modify this value.
-	#
-	Checksum on
+		#
+		# Enable/Disable message checksumming. This is a good
+		# property to achieve fault-tolerance. In case of doubt, do
+		# not modify this value.
+		#
+		Checksum on
+	}
 }
 
 #
diff --git a/src/read_config_yy.y b/src/read_config_yy.y
index 32ddeff..69a7eff 100644
--- a/src/read_config_yy.y
+++ b/src/read_config_yy.y
@@ -172,11 +172,15 @@ purge: T_PURGE T_NUMBER
 
 checksum: T_CHECKSUM T_ON 
 {
+	fprintf(stderr, "WARNING: The use of `Checksum' outside the "
+			"`Multicast' clause is ambiguous.\n");
 	conf.mcast.checksum = 0;
 };
 
 checksum: T_CHECKSUM T_OFF
 {
+	fprintf(stderr, "WARNING: The use of `Checksum' outside the "
+			"`Multicast' clause is ambiguous.\n");
 	conf.mcast.checksum = 1;
 };
 
@@ -357,6 +361,16 @@ multicast_option: T_MCAST_RCVBUFF T_NUMBER
 	conf.mcast.rcvbuf = $2;
 };
 
+multicast_option: T_CHECKSUM T_ON 
+{
+	conf.mcast.checksum = 0;
+};
+
+multicast_option: T_CHECKSUM T_OFF
+{
+	conf.mcast.checksum = 1;
+};
+
 hashsize : T_HASHSIZE T_NUMBER
 {
 	conf.hashsize = $2;