CN1649321B - Data sending and receiving method for router and bridge interconnection - Google Patents

Abstract

This invention relates to a method for interconnecting routers and bridges. The network interconnection system includes: a router with WAN interface, a bridge connected with the router via the WAN, among which, the router has a virtual Ethernet interface, the WLAN in the route can send and receive Ethernet data frames via said virtual Ethernet interface to finish the interaction with the bridge.

Description

Data sending and receiving method for router and bridge interconnection

technical field

The invention relates to the field of computer network communication, in particular to a system and method for interconnecting routers and bridges.

Background technique

There are three basic methods for LAN interconnection via WAN: router-to-router interconnection, bridge-to-bridge interconnection, and router-to-bridge interconnection.

The traditional router-to-router interconnection mode can carry out more than three layers of fine-grained control on network data, but routers mainly use software to work, and their own processing capabilities are related to CPUs. A large number of routers used in the network will make the network In addition, router products have high prices and high costs, resulting in too much investment for users to build a wide-area network; bridge-to-bridge interconnection mode data is only processed below the second layer, although it is very efficient and stable, the network The construction cost is low, but it is almost impossible to control the forwarding of user data; and although the third type is a networking mode of interconnecting routers and bridges in form, it is limited to the working mode of simulating a router as a bridge. The structure of the network, but the router only performs two-layer processing on the data of the bridge interface, resulting in the control of user data still belongs to the network mode of bridge and bridge, so this networking mode is still a simple network mode with almost no control ability. Layer 2 networking mode.

Through the analysis of the above three modes, the ways of WAN interconnection can be divided into two categories: the way of interconnection between routers and routers, which can accurately control user data, but requires a large investment; the other two belong to bridges and bridges In the same way of interconnection, although the investment is low, there is almost no data control capability. Therefore, the above two types of interconnection methods are not ideal for the networking requirements that not only control the cost but also ensure the quality of the data flow.

Contents of the invention

The technical problem to be solved by the present invention is to provide a system and method for interconnecting routers and bridges that integrate the advantages of routers and bridges, so as to solve the problem that the existing wide area network interconnection schemes cannot simultaneously satisfy the strict control of data. ability, and fully meet the user's requirements for low cost.

The technical solution adopted by the present invention to solve the technical problem is to provide a system for interconnecting routers and bridges, the network interconnection system includes: a router with a wide area network interface, and a bridge interconnected with it through the wide area network; wherein the router The WAN interface has a virtual Ethernet interface, and the WAN interface in the router can receive and send Ethernet data frames through the virtual Ethernet interface.

The present invention provides a data transmission method in which a router and a network bridge are interconnected in a local area network. The method includes a network bridge and a router with a wide area network interface, wherein the router is interconnected with the network bridge through its wide area network interface, The WAN interface of the router has the function of a virtual Ethernet interface, and the WAN interface of the router can process sending Ethernet data frames through the virtual Ethernet, thereby completing data interaction with the bridge; The specific processing steps of the bridge sending data are as follows;

a. The router receives the local LAN interface data, removes the layer 2 Ethernet encapsulation, and sends it to the layer 3 for routing or other processing;

b. After the three-layer processing is completed, the data that needs to be sent to the WAN interface is sent to the virtual Ethernet interface, and the second-layer encapsulation is performed according to the Ethernet frame format, that is, the relevant protocol processing is performed according to the standard Ethernet interface;

c. The data processed by the virtual Ethernet interface is sent to the WAN interface for link layer encapsulation of the WAN and sent to the line.

The present invention provides a data receiving method in which a router and a network bridge are interconnected in a local area network, the method comprising: a network bridge, a router having a wide area network interface, characterized in that the router is interconnected with the network bridge through its wide area network interface, The WAN interface of the router has the function of a virtual Ethernet interface, and the WAN interface of the router can receive Ethernet data frames through the virtual Ethernet. When the router performs data interaction with the bridge through its WAN interface , the specific processing steps for receiving data from the bridge are as follows:

a. The WAN interface of the router receives the data sent by the remote bridge, removes the layer 2 link layer encapsulation, and sends it to the virtual Ethernet interface;

b. After the virtual Ethernet interface processes the data at the second layer according to the standard Ethernet interface, it sends the data to the third layer for related processing;

c. After completing the three-layer routing or more layers of processing, the data is sent to the local Ethernet LAN interface for layer-2 encapsulation in Ethernet frame format, and then sent to the connected local area network.

The beneficial effect of the present invention is that it solves the problem that a large number of current network applications all adopt a symmetrical three-layer or two-layer mode for network construction. While reducing network investment, the control capability of network data is guaranteed.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic diagram of a specific embodiment of the present invention.

Detailed ways

As shown in Figure 1, in the specific WAN interconnection scheme, the center end of a general user uses a 155M-CPOS interface, and each sub-interface in the 155M interface is connected to an edge user node, and each edge node of the user A router is used.

For nodes that use bridges at the edge, the center end can also use routers, but the center end router is used as a bridging device at the same time, so that the center end router has the functions of bridging and routing at the same time, which can simplify and save the network equipment at the center end Investment, but this method leads to very limited data and network management and control of nodes using bridges.

However, after the virtual Ethernet interface function is implemented on the WAN interface of the Maipu MP7200 router, no matter whether the user edge network points use a router or a network bridge, the central router does not need to use the router as a network bridge. The serial interface of the bridge network point, such as the different sub-interfaces of the 155M-CPOS interface here, can be virtualized into the Ethernet interface of different routers, which can perfectly and conveniently interface the high-quality connection of the entire network; and because of such network construction It will protect the router investment of the user's original network to the greatest extent, and at the same time, it can boldly use routers with high forwarding efficiency for networking.

Claims (2)

1. The data sending method that router and network bridge carry out local area network interconnection, this method comprises, network bridge, the router with wide area network interface, it is characterized in that, described router is interconnected with described network bridge by its wide area network interface, and described router The WAN interface of the router has the function of a virtual Ethernet interface, and the WAN interface of the router can process sending Ethernet data frames through the virtual Ethernet interface, thereby completing the data interaction with the bridge; The steps for the bridge to send data are as follows: a. The router receives the local LAN interface data, removes the layer-2 Ethernet encapsulation, and sends it to the layer-3 for routing or other processing; b, after completing the three-layer processing, the data that needs to be sent to the WAN interface is sent to the virtual Ethernet interface, and the second-layer encapsulation is carried out according to the Ethernet frame format, that is, the relevant protocol processing is carried out according to the standard Ethernet interface; c. The data processed by the virtual Ethernet interface is sent to the wide area network interface for link layer encapsulation of the wide area network, and then sent to the line. 2. The data receiving method that router and network bridge carry out local area network interconnection, this method comprises, network bridge, the router with wide area network interface, it is characterized in that, described router is interconnected with described network bridge by its wide area network interface, and described router The WAN interface of the router has the function of a virtual Ethernet interface, and the WAN interface of the router can process receiving Ethernet data frames through the virtual Ethernet interface, thereby completing the data interaction with the bridge; the router communicates from the The steps of the method for receiving data by the bridge are as follows: a. The router WAN interface receives the data sent by the remote bridge, removes the second-layer link layer encapsulation, and sends it to the virtual Ethernet interface; b. After the virtual Ethernet interface performs layer-2 processing on the data according to the standard Ethernet interface, the data is sent to the layer-3 for related processing; c. After completing the three-layer routing or more layers of processing, the data is sent to the local Ethernet LAN interface for layer-2 encapsulation in Ethernet frame format, and then sent to the connected local area network.