1 files changed, 19 insertions, 1 deletions
diff --git a/lib/Vyatta/Qos/RoundRobin.pm b/lib/Vyatta/Qos/RoundRobin.pm
index b7d72b2..d9e90e9 100644
--- a/lib/Vyatta/Qos/RoundRobin.pm
+++ b/lib/Vyatta/Qos/RoundRobin.pm
@@ -26,8 +26,10 @@ require Vyatta::Qos::ShaperClass;
 # Create a new instance based on config information
 sub new {
     my ( $that, $config, $name ) = @_;
-
     my @classes = _getClasses( $config->setLevel() );
+
+    _checkClasses( @classes );
+
     my $self    = {};
     my $class   = ref($that) || $that;
     bless $self, $class;
@@ -36,6 +38,22 @@ sub new {
     return $self;
 }
 
+# Check constraints on sub queues
+sub _checkClasses {
+    my $level   = shift;
+
+    foreach my $class (@_) {
+	my $level = $class->{level};
+	my $qtype = $class->{_qdisc};
+	my $qlimit = $class->{_limit};
+
+	if ($qtype eq 'random-detect' && defined($qlimit) && $qlimit >= 128) {
+	    print STDERR "Configuration error in: $level\n";
+	    die "queue limit must be between 1 and 127 for random-detect\n";
+	}
+    }
+}
+
 sub _getClasses {
     my $level = shift;
     my @classes;