ifPortClass 1.3.6.1.4.1.11.2.17.4.1.5.2.1.16

For devices for which OpenView can do 'smart' network (i.e, bridges and hubs) submap layout, this indicates which port this interface corresponds to on the device, according to following: Value Meaning ------- ------------------------------------- < 255 Corresponds to a single port (the value '1' means 'port 1'). This type of value is typical for bridges. >= 255 Corresponds to a port group where the port group number is obtained by subracting 255 (the value '257' means 'port group 2'). This type of value is typical for hubs. Note: The port number OpenView uses will not necessarily match the vendor port number, but will start at 1 for the first non-port-group port. For example, if a hub has 12 EtherTwist ports, identified by the vendor as ports 1-12 and belonging to the same port group, and also an AUI port identified by the vendor as port 13, the AUI port will be port 1 for purposes of OpenView. For non-smart network connector devices, this value should be 0 and can be ignored.