A network is disclosed that includes a first tier of forwarding agents connected to a first tier of network devices. A second tier of forwarding agents is connected to a second tier of network devices. A service manager is configured to receive a packet from one of the forwarding agents; determine the...http://www.google.fr/patents/US6891839?utm_source=gb-gplus-shareBrevet US6891839 - Distributing packets among multiple tiers of network appliances
Distributing packets among multiple tiers of network appliances
