| CPC H04L 12/4633 (2013.01) [H04L 12/28 (2013.01); H04L 69/324 (2013.01)] | 7 Claims |

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3. A method for achieving network intercommunication based on neighbor negotiation, comprising:
receiving a switching request for switching from a second mode to a first mode sent by a connected device, comprising:
receiving an extended Link Layer Discovery Protocol (LLDP) request message periodically sent by the connected device, wherein the extended LLDP request message being obtained by extending an existing LLDP message to carry the switching request; and
acquiring the switching request for switching from the second mode to the first mode carried in the extended LLDP request message;
sending a response, which indicates that the first mode is to be switched to, to the connected device in response to receiving the switching request, wherein the response being an extended LLDP response message; and
switching a link mode from the second mode to the first mode;
wherein one of the first mode and the second mode is a traditional Ethernet (ETH) link mode, and the other is a flexible Ethernet (FlexE) link mode.
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