A method of routing data to a load-balanced server through a network having one or more load-balancing nodes is disclosed. The first packet of a client request is received at one of the load-balancing nodes, which stores information identifying a flow associated with the packet and an incoming interface...http://www.google.de/patents/US6856991?utm_source=gb-gplus-sharePatent US6856991 - Method and apparatus for routing data to a load balanced server using MPLS packet labels
