added cisco_comm_indexing() method for clarification/customization purposed.

Info/Layer2/C1900.pm

@@ -99,6 +99,10 @@ sub os_ver {
     return undef;
 }
 
+sub cisco_comm_indexing {
+    1;
+}
+
 sub interfaces {
     my $c1900 = shift;
     my $i_descr = $c1900->i_description();

Info/Layer2/C2900.pm

@@ -72,6 +72,14 @@ sub vendor {
     return 'cisco';
 }
 
+sub os {
+    return 'catalyst';
+}
+
+sub cisco_comm_indexing {
+    1;
+}
+
 sub i_duplex {
     my $c2900 = shift;
     

Info/Layer2/Catalyst.pm

@@ -110,6 +110,10 @@ sub os_ver {
     return undef;
 }
 
+sub cisco_comm_indexing {
+    1;
+}
+
 1;
 __END__