Encapsulation for link layer preemption

摘要

Devices implement encapsulation to support link layer preemption. The device may include a encapsulation logic that encapsulates data, such as an Ethernet frame, to produce an encapsulated frame. The encapsulated frame may include an encapsulation element that indicates whether the encapsulated data includes non-preemptible data, such as Distinguished Minimum Latency Traffic (DMLT), or preemptible data. The encapsulated frame may also indicate whether the encapsulated data comprises the last fragment of a preemptible frame.

主权项

1. A method comprising:
in a network device: obtaining frame data; encapsulating the frame data by: adding an encapsulation element to the frame data by replacing a pre-existing portion of the frame data with the encapsulation element, the encapsulation element including a frame number and a fragment indicator indicating whether the frame data comprises an initial fragment or a non-initial fragment, and the encapsulation element indicating whether or not transmission of the frame data may be pre-empted; and transmitting the frame data encapsulated with the encapsulation element.