Qos on a virtual interface over multi-path transport

A first network device for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, the first network device comprising:

• a set of one or more processors;
• and
• a non-transitory machine-readable storage medium containing code, which when executed by the set of one or more processors, cause the first network device to:
• receive a packet of the virtual interface, wherein the virtual interface is provisioned with a virtual interface QoS, and wherein the virtual interface comprises a hierarchy of sub interfaces;
• select a virtual adjacency from a plurality of virtual adjacencies maintained by the first network device based on metadata included in the packet,
• wherein each virtual adjacency is associated with the virtual interface or a sub interface of the virtual interface;
• use the selected virtual adjacency to
• select a queue from a set of virtual interface queues of the selected virtual adjacency based on a priority of the packet, and
• store the packet in the selected queue;
• perform hierarchical scheduling based on the virtual interface QoS to select the queue from all sets of virtual interface queues of all virtual adjacencies;
• and
• send the packet from the selected queue and a transport link identifier (ID) to a physical network processing unit (NPU) that is to forward the packet over a physical transport link identified by the transport link ID, to cause the physical NPU to apply a QoS on the packet based on the transport link ID.

A non-transitory computer-readable storage medium having computer code stored therein, which when executed by a processor of a first network device for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, cause the first network device to perform operations comprising:

• receiving a packet of the virtual interface, wherein the virtual interface is provisioned with a virtual interface QoS, and wherein the virtual interface comprises a hierarchy of sub interfaces;
• selecting a virtual adjacency from a plurality of virtual adjacencies maintained by the first network device based on metadata included in the packet, wherein each virtual adjacency is associated with the virtual interface or a sub interface of the virtual interface;
• using the selected virtual adjacency to
• select a queue from a set of virtual interface queues of the selected virtual adjacency based on a priority of the packet, and
• store the packet in the selected queue;
• performing hierarchical scheduling based on the virtual interface QoS to select the queue from all sets of virtual interface queues of all virtual adjacencies;
• and
• sending the packet from the selected queue and a transport link identifier (ID) to a physical network processing unit (NPU) that is to forward the packet over a physical transport link identified by the transport link ID, to cause the physical NPU to apply a QoS on the packet based on the transport link ID.

A method in a first network device for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, the method comprising:

• receiving a packet of the virtual interface from a service home network processing unit (NPU), wherein the virtual interface has been provisioned with a virtual interface QoS, wherein the service home NPU has applied the virtual interface QoS on the packet, and wherein the packet includes a physical transport link identifier (ID) that identifies a physical transport link over which the packet is to be forwarded by the first network device;
• selecting a virtual adjacency from a plurality of virtual adjacencies maintained by the first network device based on metadata included in the packet, wherein each virtual adjacency is associated with a virtual interface;
• using the selected virtual adjacency to
• select a queue based on the physical transport link ID, and
• store the packet in the selected queue;
• performing scheduling to select the queue;
• and
• sending the packet from the selected queue over the physical transport link.

A first network device for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, the first network device comprising:

• a set of one or more processors;
• and
• a non-transitory machine-readable storage medium containing code, which when executed by the set of one or more processors, cause the first network device to:
• receive a packet of the virtual interface from a service home network processing unit (NPU), wherein the virtual interface has been provisioned with a virtual interface QoS, wherein the service home NPU has applied the virtual interface QoS on the packet, and wherein the packet includes a physical transport link identifier (ID) that identifies a physical transport link over which the packet is to be forwarded by the first network device;
• select a virtual adjacency from a plurality of virtual adjacencies maintained by the first network device based on metadata included in the packet, wherein each virtual adjacency is associated with a virtual interface;
• use the selected virtual adjacency to
• select a queue based on the physical transport link ID, and
• store the packet in the selected queue;
• perform scheduling to select the queue;
• and
• send the packet from the selected queue over the physical transport link.

A non-transitory computer-readable storage medium having computer code stored therein, which when executed by a processor of a first network device for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, cause the first network device to perform operations comprising:

• receiving a packet of the virtual interface from a service home network processing unit (NPU), wherein the virtual interface has been provisioned with a virtual interface QoS, wherein the service home NPU has applied the virtual interface QoS on the packet, and wherein the packet includes a physical transport link identifier (ID) that identifies a physical transport link over which the packet is to be forwarded by the first network device;
• selecting a virtual adjacency from a plurality of virtual adjacencies maintained by the first network device based on metadata included in the packet, wherein each virtual adjacency is associated with a virtual interface;
• using the selected virtual adjacency to
• select a queue based on the physical transport link ID, and
• store the packet in the selected queue;
• performing scheduling to select the queue;
• and
• sending the packet from the selected queue over the physical transport link.

A method in a virtual machine for applying Quality-of-Service (QoS) on a virtual interface over a multi-path transport topology, the method comprising:

• receiving a packet of the virtual interface, wherein the virtual interface is provisioned with a virtual interface QoS, and wherein the virtual interface comprises a hierarchy of sub interfaces;
• selecting a virtual adjacency from a plurality of virtual adjacencies maintained by the virtual machine based on metadata included in the packet, wherein each virtual adjacency is associated with the virtual interface or a sub interface of the virtual interface;
• using the selected virtual adjacency to
• select a queue from a set of virtual interface queues of the selected virtual adjacency based on a priority of the packet, and
• store the packet in the selected queue;
• performing hierarchical scheduling based on the virtual interface QoS to select the queue from all sets of virtual interface queues of all virtual adjacencies;
• and
• sending the packet from the selected queue and a transport link identifier (ID) to a physical network processing unit (NPU) that is to forward the packet over a physical transport link identified by the transport link ID, to cause the physical NPU to apply a QoS on the packet based on the transport link ID.