A high-speed router and method for operation of the core of such a router are disclosed. The disclosure describes switching packet data through a router core serving core ingress and egress ports. The router maintains at least one always-up ingress serial link from each core ingress port to the router...http://www.google.com/patents/US7277425?utm_source=gb-gplus-sharePatent US7277425 - High-speed router switching architecture
