CN1486030A - A Method for Realizing Multi-Bridge Group Multiplexing on Wide Area Network Interface - Google Patents

Abstract

The invention relates to a method for realizing multi-bridge group multiplexing on a wide area network interface, which belongs to the technical field of data communication. First, configure multiplexing ports on the two routers respectively, and mark the bridge group to which the interface belongs; write the information of the bridge group to which the message to be sent belongs to the header of the message, and perform link layer encapsulation; remove the message at the link layer The corresponding link layer information in the message, take out the bridge group information in the header of the message, and forward the message to the corresponding bridge group; set a different sending queue for each bridge group that needs to communicate on the multiplexed port of the router, adjust Queue length, which limits bandwidth individually for each bridge group. The method of the invention can realize the communication of multi-bridge group data on any single link capable of transmitting messages without depending on the link layer protocol. At the same time, according to user needs, the ratio of bandwidth usage of multiplexed links by different bridge groups can be adjusted, so as to ensure priority passage of important messages.

Description

A Method for Realizing Multi-Bridge Group Multiplexing on Wide Area Network Interface

technical field

The invention relates to a method for realizing multi-bridge group multiplexing on a wide area network interface, which belongs to the technical field of data communication.

Background technique

The bridging function on the router can realize the division of multiple bridge groups. Ethernet packets can be forwarded between bridge interfaces belonging to the same bridge group, but data cannot be forwarded between bridge interfaces of different bridge groups. This method can ensure that users can divide bridge groups flexibly according to the application and actual use environment, so as to achieve the purpose of communication within the same bridge group and isolation between different bridge groups. However, a bridge interface can only belong to one bridge group. When two bridge groups communicate within a bridge group through a link, multiple bridge groups cannot communicate simultaneously through a link.

On the router, if the bridging function needs to be implemented, the corresponding bridging interface and the bridge group to which the bridging interface belongs must be specified. Data can be forwarded between bridge interfaces belonging to the same bridge group, but data cannot be forwarded between bridge interfaces of different bridge groups. When two routers are connected to different bridge groups and need to communicate with each other, the following three methods can be adopted:

The first method is to use multiple links between the routers, and each link belongs to a bridge group, so that each bridge group can communicate with each other.

The second method is to use an Ethernet interface to connect two routers, and create an Ethernet sub-interface on the router for each bridge group that needs to communicate. Different sub-interfaces belong to different bridge groups, so that communication can also be realized.

The third method is to use X25 or frame relay network and create sub-interfaces for each bridge group. Different sub-interfaces belong to different bridge groups, so that communication can also be realized.

In Figure 1, router A is configured with two bridge interfaces, Ethernet 1 and Ethernet 2, respectively connected to bridge group 1 and bridge group 2, and router B is also configured with two bridge interfaces, Ethernet 1 and Ethernet Net 2 connects bridge group 1 and bridge group 2 respectively. In order to realize the communication between bridge group 1 on router A and bridge group 1 on router B, an interface that can communicate with each other must be configured between router A and router B and belongs to bridge group 1. This interface can be a physical interface, that is, the above method, It can also be a sub-interface, that is, the above method 2 and method 3; in order to realize the communication between bridge group 2 on router A and bridge group 2 on router B, an interface that can communicate with each other must be configured between router A and router B. bridge group 2.

Among the above three methods currently used, the first method requires additional link support and is costly; the second method has limitations and can only be connected to the router through Ethernet, but in practical applications, it is mostly a low-speed serial port; Although the third method of communication can realize multi-bridge group communication for a specific protocol on the serial port, the configuration is more complicated and depends on a specific link layer protocol. It cannot support link layer protocols such as PPP and HDLC, which increases management and monitoring. Moreover, the secondary routing of X25 and frame relay is required, which reduces the efficiency of data forwarding.

Contents of the invention

The purpose of the present invention is to propose a kind of method that realizes multi-bridge group multiplexing on wide area network interface for the situation that multi-bridge group is only connected by a link, on a link, realizes the multiplexing of multiple bridge group data, Enables quick and easy communication between multi-bridge groups.

The method that the present invention proposes realizes multi-bridge group multiplexing on the wide area network interface, comprises the following steps:

1. Configure multiplexed ports on the two routers, and mark the bridge group to which the interface belongs;

2. When the first router sends a message through the above-mentioned multiplexed port, write the information of the bridge group to which the message belongs to the header of the message, and perform link layer encapsulation;

3. When the second router receives a message through the above-mentioned multiplexed port, it removes the corresponding link layer information in the message at the link layer, takes out the bridge group information at the header of the message, and then sends the message according to the bridge group information to which the message belongs. The text is forwarded to the corresponding bridge group.

In the above method, the multiplexed ports on the router are configured by the user.

In step (1) of the above method, different sending queues are set for each bridge group that needs to communicate at the multiplexed port of the router, the length of the queue is adjusted, and the bandwidth is limited for each bridge group respectively.

The process of limiting the bandwidth for each bridge group on the multiplexed port of the router includes the following steps:

1. According to the number of bridge groups to which the configured multiplexed ports belong, generate queues equal to the number of bridge groups to which they belong;

2. Initially, the length of each of the above queues is equal to the length of the message sending queue of the bridge interface;

3. According to the pre-set bandwidth ratio of multiplexed ports of the bridge group, the queue length corresponding to each bridge group on the multiplexed port is changed by configuring commands for the router.

When the message is forwarded to the multiplexed port of the bridge group, the message data is first put into the queue corresponding to the bridge group, and then the multiplexed port sends the messages in each queue, that is, the multiplexed port sends the message first After finishing all the messages in the first queue, all the messages in the second queue are sent, and so on. When the queue on the multiplexed port corresponding to the bridge group is full, the packets forwarded by the bridge group are discarded.

The method for realizing multi-bridge group multiplexing on the wide area network interface proposed by the present invention, when multiple bridge groups are connected through a link, the interface connected to the link is made to participate in the forwarding of multiple bridge groups at the same time, that is, an interface configuration into multiple bridge groups. This allows each bridge group to use the only interface connected to that link when sending data over that link. In order for the router to correctly distinguish which bridge group the data belongs to when receiving data at the multiplexed port, the information of the bridge group to which the data belongs is also transmitted to the remote router that supports this function while transmitting the data. At the same time, one interface and link is multiplexed in multiple bridge groups for flow control, and a separate sending queue is set for each bridge group, so that the proportion of bandwidth used by each bridge group can be adjusted according to management needs. Therefore, the method of the present invention can realize the communication of multi-bridge group data on any single link that can transmit messages without depending on the specific link layer protocol. At the same time, according to the user's needs, the bandwidth usage ratio of different bridge groups to the multiplexing link can be adjusted, so as to ensure the preferential passage of important messages.

Description of drawings

FIG. 1 is a schematic diagram of simultaneous communication between two devices in different bridge groups in the prior art.

Fig. 2 is a schematic diagram of an application example of the method of the present invention.

Detailed ways

The method for realizing multi-bridge group multiplexing on the wide area network interface proposed by the present invention first configures the multiplexed ports respectively on the two routers, and indicates the bridge group to which the interface belongs; when the first router sends a message through the above-mentioned multiplexed ports, Write the information of the bridge group to which the message belongs to the header of the message, and carry out link layer encapsulation; when the second router receives the message through the above-mentioned multiplexing port, remove the corresponding link layer information in the message at the link layer, Take out the bridge group information in the header of the message, and then forward the message to the corresponding bridge group according to the bridge group information to which the message belongs.

In the above method, the multiplexed ports on the router can be configured by the user.

In the above method, different sending queues are set for each bridge group that needs to communicate on the multiplexed port of the router, the queue length is adjusted, and the bandwidth is respectively limited for each bridge group. The number of bridge groups generates queues equal to the number of bridge groups it belongs to; initially, the length of each queue is equal to the length of the message sending queue of the bridge interface; command to change the queue length corresponding to each bridge group on the multiplexing port; when the message is forwarded to the multiplexing port of the bridge group, the message data will be put into the queue corresponding to the bridge The multiplexed port sends the packets in each queue, that is, the multiplexed port sends all the packets in the first queue first, and then sends all the packets in the second queue. When the multiplexed port corresponding to the bridge group When the queue on the bridge group is full, the packets forwarded by the bridge group are discarded.

Figure 2 shows an embodiment of the present invention, wherein, router A is the first router, and router B is the second router, and the functions of the two routers are the same and can be interchanged, that is, router A becomes the second router, and router B becomes the second router. first router. The multiplexed port belongs to both bridge groups 1 and 2, and the multiplexed port will generate two queues. The length of the queue is initially equal to the length of the packet sending queue of the bridge interface, and this length is inherent to each interface on the router.

The user changes the corresponding length of each bridge group on the multiplexed port through the configuration command and according to the bandwidth ratio of the bridge group multiplexed port set in advance. Initially, the queue lengths are equal, which is equal to the packet sending queue length of the bridge interface. In this case, the maximum bandwidth of multiplexed ports that can be used by each bridge group is also equal. If it is necessary to ensure that the packets of one of the bridge groups can use a larger bandwidth, then the corresponding queue lengths of other bridge groups should be changed to a smaller value. If it is necessary to realize that the bandwidth ratio of two bridge groups using multiplexing ports is 1:2, then the queue length of one bridge group at the multiplexing port can be changed to half of that of the other.

When the bridge group message is forwarded to the multiplexed port, the message is first put into the queue corresponding to the bridge group, and when the multiplexed port sends the message, the message in each queue is sent sequentially, for example After completing all the packets in the first queue, send all the packets in the second queue.

When the queue on the multiplexed port corresponding to the bridge group is full, the message sent from the bridge group cannot enter the queue and is discarded directly.

The above process can limit the bandwidth of different bridge groups respectively. For example, in Figure 2, if the queue lengths of bridge groups 1 and 2 are set to 1:2 on the multiplexed port of router A, it means that bridge group 2 can use The bandwidth is twice that of bridge group 1. Assume that the queue length of bridge group 1 is 100, and the queue length of bridge group 2 is 200. If the data packets forwarded by bridge group 1 and bridge group 2 to the multiplexed port are 200 or more at the same time, then in The queue of bridge group 2 can store 200 data packets, while the queue of bridge group 1 can only store 100 data packets, and the rest are discarded. The result is that bridge group 2 can send 200 packets, while bridge group 1 can only send 100 packets. In order to achieve the purpose of proportional allocation of bandwidth.

In Figure 2, two bridge groups on Router A and two bridge groups on Router B can communicate through a serial line. When bridge group 1 on router A needs to send a message to bridge group 1 of router B, the message is added to the information of bridge group 1 before the serial port of router A is transmitted. After receiving such a message, router B judges the message The bridge group information in the bridge group is found to be the message of bridge group 1, so it is sent to bridge group 1 through Ethernet port 1, so as to realize the communication of bridge group 1; the communication of bridge group 2 is also realized in the same way.

In some cases, it may be necessary to give priority to guaranteeing the important data of a certain bridge group, and the bandwidth ratio allocated to different bridge groups can be configured on the multiplexed serial port. If in the example in Figure 2, you can specify that the bandwidth usage of bridge group 1 and bridge group 2 on the serial port is 2:1, it can ensure that when both bridge groups have a large amount of data, the data of bridge group 2 will Bandwidth usage can be up to twice that of bridge group 2 data.

Claims (7)

1. A method for realizing multi-bridge group multiplexing on a wide area network interface, characterized in that the method may further comprise the steps: (1) Configure multiplexed ports on the two routers respectively, and indicate the bridge group to which the interface belongs; (2) When the first router sends a message through the above-mentioned multiplexing port, write the information of the bridge group to which the message belongs to the header of the message, and carry out link layer encapsulation; (3) When the second router receives the message through the above-mentioned multiplexed port, it removes the corresponding link layer information in the message at the link layer, takes out the bridge group information at the head of the message, and converts the message according to the bridge group information to which the message belongs. The message is forwarded to the corresponding bridge group. 2. The method according to claim 1, characterized in that the multiplexing ports on the router are configured by the user. 3, the method as claimed in claim 1 is characterized in that in the (1) step, at the multiplexing port of router, different transmission queues are set for each bridge group that needs communication, adjust queue length, for each bridge group Limit bandwidth individually. 4. The method according to claim 3, characterized in that the process of limiting the bandwidth for each bridge group at the multiplexing port of the router comprises the following steps: (1) Generate queues equal to the number of bridge groups to which the configured multiplexing ports belong; (2) Initially, the length of the above-mentioned queues is equal to the length of the message sending queue of the bridge interface; (3) According to the bandwidth ratio of the multiplexed port of the bridge group set in advance, the queue length corresponding to each bridge group on the multiplexed port is changed by configuring the command to the router. 5. The method according to claim 4, wherein when the message is forwarded to the multiplexed port of the bridge group, the message data is first put into the queue corresponding to the bridge group, and then the multiplexed port Send messages in each queue. 6. The method according to claim 5, wherein the multiplexing port sends all the messages in the first queue first, and then sends all the messages in the second queue, and so on. 7. The method according to claim 5, wherein when the message is forwarded to the multiplexed port of the bridge group, when the queue on the multiplexed port corresponding to the bridge group is full, then discard the message sent by the multiplexed port. Packets forwarded by the bridge group.

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