| 摘要 |
Provided are a communication method and device based on an optical network system. The optical network system comprises a protection group, wherein a primary port of a first device in the protection group is connected to a second device in the protection group, and a standby port of the first device is connected to a third device in the protection group. The method comprises: when a first device detects that switching occurs in a protection group, acquiring identification information about a DHCP terminal; the first device generating, according to the identification information, a DHCP request message used to request an IP address for the DHCP terminal; the first device sending the DHCP request message to a third device, so that the third device forwards the DHCP request message to a DHCP server; the first device receiving a DHCP response message sent by the third device, the DHCP response message comprising an IP address allocated by the DHCP server to the DHCP terminal; and the first device sending, to the DHCP terminal, the IP address allocated by the DHCP server thereto. In the embodiments of the present invention, rapid protection switching of an end-to-end service can be implemented, thereby improving the reliability of service transmission between a user terminal and a network side. |
