Method, system and routing device for implementing sub-interface by high-speed physical interface

Abstract

The invention discloses a method for realizing a sub-interface in a high-speed physical interface, a system and a route device, belonging to the communication field. The method comprises the following steps: when a three-layer message is retransmitted, a corresponding outgoing interface is searched in a route table according to the destination IP address of the message; when the outgoing interface is the sub-interface, the message is encapsulated as a point to point protocol message with sub-connection identification information and the point to point protocol message is transmitted to a receiving end. The system comprises a first route and a second route. The device comprises a search module, an encapsulate module and a transmit module. The invention encapsulates the message waiting to be transmitted as the PPP message with the sub-connection identification information, the receiving end can identify different sub-connections according to the sub-connection identification information, thus realizing the sub-interface function, satisfying the demands of a user with multi-interfaces, saving the physical interfaces and reducing the cost of the device.

Description

technical field

[0001] The invention relates to the communication field, in particular to a method, a system and a routing device for realizing a sub-interface of a high-speed physical interface. Background technique

[0002] In data communication products, the high-speed physical interfaces provided for transmitting data are generally Ethernet interfaces and POS (Packet Over Synchronous Optical NETwork, synchronous optical network transmission packet) interfaces. Ethernet interfaces include FE (Fast Ethernet, Fast Ethernet), GE ( Gigabit Ethernet, Gigabit Ethernet), 10GE-WAN (Wide Area Network, wide area network), 10GE-LAN ​​(Local Area Network, local area network) and other interfaces; POS interfaces include 155MPOS, 622MPOS, 2.5GPOS, 10GPOS and other interfaces. In many application scenarios, the physical interface between devices is limited. For example, there may be a connection between a CE (Custom Edge Router, user network edge router) and a PE (Provider Edge Router, ...

Examples

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...

technical field

[0001] The invention relates to the communication field, in particular to a method, a system and a routing device for realizing a sub-interface of a high-speed physical interface. Background technique

[0002] In data communication products, the high-speed physical interfaces provided for transmitting data are generally Ethernet interfaces and POS (Packet Over Synchronous Optical NETwork, synchronous optical network transmission packet) interfaces. Ethernet interfaces include FE (Fast Ethernet, Fast Ethernet), GE ( Gigabit Ethernet, Gigabit Ethernet), 10GE-WAN (Wide Area Network, wide area network), 10GE-LAN ​​(Local Area Network, local area network) and other interfaces; POS interfaces include 155MPOS, 622MPOS, 2.5GPOS, 10GPOS and other interfaces. In many application scenarios, the physical interface between devices is limited. For example, there may be a connection between a CE (Custom Edge Router, user network edge router) and a PE (Provider Edge Router, ...

Examples

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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