| 摘要 |
Disclosed are a service protection method, optical line terminal and system in a passive optical network, relating to the field of communications, which not only can realize service protection after the failure of a working link between a first OLT and a switching device, but can also realize service protection after the failure of a second VLAN service channel, thereby being able to ensure normal access of service data. The specific solution is: a second VLAN service channel is provided between a second OLT and a switching device, when a main link breaks down, the second OLT executes main-standby switching and receives service data from an ONT, and the service data is sent to the switching device via the second VLAN service channel. The present invention is used in a dual homing protection process among network device nodes. |
