handling of els req and rsp packets that contain addresses in the payload is shifted to the edge fabric switches connected to the node devices issuing and receiving the els req packet , the ingress and egress switches . this allows the els req and rsp packet payload address modification operations to be removed from the tasks handled by the router processor . as this removes a processing burden from the router processors , those router processors are free to handle other normal operations , thus allowing more processor bandwidth to be provided to those other operations , which allows further growth of the network as one limitation has been removed . the need to replicate or provide commands between switches or routers is avoided as there are no redundant paths at that point .