In order to reduce network congestion and fully use link bandwidth

when there are Equal-cost-multi-paths (ECMPs) between a forwarding node and a destination subnet

traffic load should be balanced among ECMPs and packets of the same TCP flow should reach destination host in the same order.An algorithm called LRU-based caching with counting (LCC) is proposed.Packet length differentiation is considered to achieve load balance by adapting a counter for each ECMP

and counter overflow is solved by relative counting and restrictions.UDP packets only need to be concerned to achieve load balance.Furthermore

flow delay differentiation forwarding to different hosts of the same destination subnet is transformed to entries in cache invalided time period difference.Simulation shows that when delay differentiation among ECMPs is not significant

storage requirement is small

only one cycle is needed for each cache lookup

load balance is near optimal

and only 2% of packets are out of order.