A port aggregation protocol (PAGP) dynamically aggregates redundant links between two neighboring devices in a computer network through the exchange of aggregation protocol data unit (AGPDU) frames between the two devices. Each AGPDU frame contains a unique identifier corresponding to the device sourcing...http://www.google.de/patents/US6298061?utm_source=gb-gplus-sharePatent US6298061 - Port aggregation protocol
