System and Method for Dynamic Rate Control in Ethernet Fabrics

摘要

An Ethernet device includes receive buffers and transmit buffers of a port, and a processor. The buffers are each associated with a respective class of service. The processor operates to determine a current buffer utilization in a receive buffer, determine that the current buffer utilization is different than a buffer threshold for the receive buffer, determine a data rate limit for the class of service associated with the receive buffer based upon the difference between the current buffer utilization and the buffer threshold, and send a data rate limit frame to another device coupled to the port. The data rate limit frame includes the data rate limit for the class of service.

主权项

1. An Ethernet device comprising:
a port including a plurality of receive buffers, each receive buffer being associated with a respective virtual link of the port, and each virtual link being associated with a respective class of service of a plurality of classes of service; and a processor that:
determines a first data rate limit for a first one of the classes of service associated with a first one of the receive buffers based upon a difference between a first current buffer utilization of the first buffer and a first buffer threshold for the first buffer, wherein the first receive buffer is associated with a first one of the virtual links; andsends a first data rate limit frame to another device coupled to the port, the first data rate limit frame including the first data rate limit and a first class enable vector bit that associates the first data rate limit with the first virtual link.