POD updates

Info/Layer2/3Com.pm

@@ -133,14 +133,24 @@ These are methods that return scalar value from SNMP
 
 =item $device->vendor()
 
+Returns '3Com'
+
 =item $device->os()
 
+Returns '3Com'
+
 =item $device->os_ver()
 
+Return os version
+
 =item $device->model()
 
+Returns device model extracted from description
+
 =item $device->serial()
 
+Returns serial number
+
 =back
 
 =head2 Globals imported from SNMP::Info::Layer2
@@ -152,12 +162,6 @@ See documentation in L<SNMP::Info::Layer2/"GLOBALS"> for details.
 These are methods that return tables of information in the form of a reference
 to a hash.
 
-=head2 Overrides
-
-=over
-
-=back
-
 =head2 Table Methods imported from SNMP::Info::Layer2
 
 See documentation in L<SNMP::Info::Layer2/"TABLE METHODS"> for details.