CLOCK SYNCHRONIZATION METHOD FOR MULTIPLE CLOCK DOMAINS, LINE CARD, AND ETHERNET DEVICE

摘要

The present invention discloses a clock synchronization method in a multi-clock domain, a line card, and an Ethernet device. The method includes: acquiring, by a sending line card, M clock frequency differences that are determined by a receiving line card and that are of M uplink interfaces corresponding to M downlink interfaces on the sending line card, where the M uplink interfaces are uplink interfaces on the receiving line card, and M is a positive integer; and adjusting, by the sending line card by using each clock frequency difference of the M clock frequency differences of the M uplink interfaces and based on a correspondence between the M downlink interfaces and the M uplink interfaces, a transmit clock of an interface corresponding to the clock frequency difference.