Presented is a method of determining network topology. A determination is made whether a remote port on a first network device for establishing a layer 2 connection is an aggregate port. If the remote port is an aggregate port, identify the aggregate port and a coupled second network device based on Management Information Base (MIB) attributes. Identify a base port of the second network device from the aggregate port on the first network device, and a local interface index number corresponding to the identified base port from a mapping between local interface index numbers and corresponding base ports of the second network device.