Patent ID: 9197586
Filing Date: 2015-11-24
Classification: H04L

Abstract:
1. Network apparatus, comprising: a plurality of interfaces, which are configured to be coupled to a network so as to receive and transmit data packets having respective link-layer headers and network-layer headers, each link-layer header comprising respective source and destination link-layer addresses and a link-layer priority value field; and switching and routing logic, which is configured, responsively to the network-layer headers, to transfer each data packet from a respective ingress interface to a respective egress interface and to modify the source and destination link-layer addresses of the transferred data packets while, for a first group of packets including at least a sub-group of the packets received through the plurality of interfaces, copying the link-layer priority value in the link-layer priority value field of the packet link layer header from the ingress interface to the link-layer priority value field of the packet link layer header in the egress interface without modification, wherein the link-layer priority value field of the packet link layer header is used by units handling the data packet in implementing priority flow control.