Method, system and routing device for implementing sub-interface by high-speed physical interface
A physical interface and sub-interface technology, which is applied in the field of high-speed physical interface to realize sub-interface, can solve the problems of slow negotiation process, no security verification, complexity, etc., and achieve the effect of reducing costs and saving numbers
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Embodiment 1
[0041] see image 3 , this embodiment provides a method for realizing a sub-interface by a high-speed physical interface. The high-speed physical interface may be a POS interface, or an Ethernet interface, or an ATM interface. This embodiment uses the POS interface as an example for illustration. The method include:
[0042] Step 101: the user creates a sub-interface for the PPP channel, and saves the sub-interface information;
[0043] Among them, the PPP channel refers to the connection between two routers through a POS interface, and the POS interface supports the PPP protocol; when creating sub-interfaces, the user configures sub-connection identifiers under different sub-interfaces, and configures different IP addresses for the sub-interfaces. The address stores the correspondence between the sub-connection identifier and the IP address and the sub-interface as sub-interface information, which can be stored in a sub-interface information table or in other forms.
[0044...
Embodiment 2
[0070] see Figure 5 , the present embodiment provides a system for realizing a sub-interface by a high-speed physical interface, including:
[0071] The first router is used to forward the three-layer message, and searches the corresponding outgoing interface in the routing table according to the destination IP address of the message; when the outgoing interface is a sub-interface, the message is encapsulated as having a sub-connection A point-to-point protocol packet identifying information, and sending the point-to-point protocol packet;
[0072] Among them, there are many ways to encapsulate the P2P protocol message with sub-connection identification information, for example, it can be realized by extending the message frame format of the PPP protocol, or it can be realized in other ways, which will not be described in detail here.
[0073] The second router is used to receive the point-to-point protocol message sent by the first router, decapsulate it, and obtain sub-con...
Embodiment 3
[0077] see Figure 6 , this embodiment provides a routing device, including:
[0078] The search module 201 is configured to search the corresponding outgoing interface in the routing table according to the destination IP address of the message when forwarding the three-layer message;
[0079] The encapsulation module 202 is used to encapsulate the message as a point-to-point protocol message with sub-connection identification information when the outgoing interface found by the search module 201 is a sub-interface;
[0080] The sending module 203 is configured to send the P2P protocol packet encapsulated by the encapsulating module 202 to the opposite end.
[0081] The encapsulation module 202 is configured to encapsulate the message to be sent into a point-to-point protocol message with a sub-connection protocol field and a sub-connection identification field, wherein the value in the sub-connection protocol field is a predetermined value, and the sub-connection identificat...
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