Advertising network layer reachability information specifying a quality of service for an identified network flow

A non-transitory computer readable medium comprising computer readable instructions that, when executed, cause a processor of a first network element to perform operations comprising:

• advertising a first flow specification and a first quality of service for a first network flow to be received by the first network element;
• constructing a packet filter for a second network flow, the packet filter constructed based on a second flow specification and a second quality of service advertised by a second network element that is to receive the second network flow;
• adjusting, based on the packet filter, bits of an incoming packet determined to belong to the second network flow to determine an updated incoming packet, the bits of the incoming packet being adjusted from a first value representing the second quality of service in a first network from which the incoming packet was received to a different, second value representing the same second quality of service in a second network in which the updated incoming packet is to be routed;
• and
• assigning the updated incoming packet to a routing queue corresponding to the second quality of service to cause the updated incoming packet to be routed towards the second network element.

A method comprising:

• advertising, by executing an instruction with a processor of a first network element, a first flow specification and a first quality of service for a first network flow to be received by the first network element;
• constructing, by executing an instruction with the processor, a packet filter for a second network flow, the packet filter constructed based on a second flow specification and a second quality of service advertised by a second network element that is to receive the second network flow;
• adjusting, by executing an instruction with the processor and based on the packet filter, bits of an incoming packet determined to belong to the second network flow to determine an updated incoming packet, the bits of the incoming packet being adjusted from a first value representing the second quality of service in a first network from which the incoming packet was received to a different, second value representing the same second quality of service in a second network in which the updated incoming packet is to be routed;
• and
• assigning, by executing an instruction with the processor, the updated incoming packet to a routing queue corresponding to the second quality of service to cause the updated incoming packet to be routed towards the second network element.