Data transmission method and network device

A data transmission method comprising:

• receiving, by a second network device, request information describing an amount of data a first network device requests to send to the second network device;
• determining, by the second network device, a first credit limit that is an amount of data allowed to be sent by the first network device in a packet-distributed load sharing manner;
• determining, by the second network device, a first sequence number based on the first credit limit and either remaining space in an ordering cache of the second network device and the requested amount of data or a cumulative base of the second network device,
• wherein the first sequence number indicates a sum of an amount of data second network device has previously authorized the first network device to send in the packet-distributed load sharing manner and an amount of data the second network device presently authorizes the first network device to send in the packet-distributed load sharing manner;
• and
• determining, by the second network device, a second sequence number based on the cumulative base and a second credit limit that is an amount of data allowed to be sent by the first network device to a port of the second network device,
• wherein the second credit limit is based on a bandwidth margin and the requested amount of data, and
• wherein the second sequence number indicates a sum of an amount of data the second network device has previously authorized the first network device to send to a port of the second network device and an amount of data that the second network device presently authorizes the first network device to send to a port of the second network device;
• sending, by the second network device, grant information to the first network device, wherein the grant information comprises the first sequence number and the second sequence number.

A non-transitory computer-readable storage medium, comprising one or more instructions, wherein when the one or more instructions are executed by one or more processors, the one or more processors is caused to perform a data transmission method comprising:

• sending request information to a network device, wherein the request information is used to request to send data;
• receiving grant information sent by the network device, wherein the grant information comprises first and second sequence numbers;
• in response to the first sequence number being greater than a largest first sequence number previously received, determining a first credit limit based on a difference between the first sequence number and the largest first sequence number,
• wherein the first credit limit is an amount of data allowed to be sent in a packet-distributed load sharing manner;
• in response to the second sequence number being greater than a largest second sequence number previously received, determining a second credit limit based on a difference between the second sequence number and the largest second sequence number,
• wherein the second credit limit is an amount of data allowed to be sent to a port of the network device;
• and
• sending data to the network device based on the first and second credit limits.