Method for exchanging time synchronization packet and network apparatus

A network apparatus, comprising:

• a processor, configured to determine a first time deviation of a boundary clock (BC) of the network apparatus relative to the first clock source according to clock synchronization packets exchanged with the first clock source, wherein the BC avoids performing an operation of calibrating a time of a local clock of the BC according to the first time deviation;
• and
• a transceiver, configured to send a first clock synchronization packet to a first slave clock of the BC, wherein the first clock synchronization packet comprises a first timestamp generated by the BC, a value of the first timestamp is equal to a first corrected value, and the first corrected value is a value obtained by the BC by correcting a time t1 of the local clock by using the first time deviation, wherein the time t1 is a time at which the BC generates the first timestamp.

A system, wherein comprising a first network device, and a second network device, wherein the first network device is a first clock source of the second network device, and the second network device comprises a boundary clock (BC), the second network device is configured to:

• determine a first time deviation of the BC relative to the first clock source according to clock synchronization packets exchanged with the first clock source, wherein the BC avoids performing an operation of calibrating a time of a local clock of the BC according to the first time deviation;
• and
• send a first clock synchronization packet to a first slave clock of the BC, wherein the first clock synchronization packet comprises a first timestamp, a value of the first timestamp is equal to a first corrected value, and the first corrected value is a value obtained by the BC by correcting a time t1 of the local clock by using the first time deviation, wherein the time t1 is a time at which the BC generates the first timestamp.