Method and device for updating port index, and multi-device system

摘要

Embodiments of the present invention relate to a method and a device for updating a port index in a multi-device system, and a multi-device system. The method includes: detecting whether a device ID of a device is changed in a multi-device system, where the detecting is performed by comparing device IDs of each device in the multi-device system before and after the detection; and for a device whose device ID is changed in the system, updating a port index of the device according to the device ID after the change, where the port index is used to acquire configuration data of the port. The embodiments of the present invention solve the problem of failing to find correct port configuration data by using the port index because the device ID is changed.