CN100411388C - A Method for Realizing Mirror Image in Switching System - Google Patents

Abstract

The present invention provides a method for realizing a mirror in an exchange system, which has the core that: a special mirror output queue for mirror data packets is arranged at a mirror objective port, and the mirror data packets are orderly stored in the mirror output queue; the mirror data packets stored in the mirror output queue are orderly output from the mirror objective port. The present invention can flexibly control the output priority, the output occupied bandwidth, etc. of normal data packets and the mirror data packets, avoids the influence on the output performance of the normal data packets by the mirror data packets, can ensure the strict consistency of the output orders of mirrored data packets and output mirror data packets in the process of the output of the mirrors, and thereby, realizes the purposes that the transmission performance of the data packets and the reliability of the mirrors are enhanced.

Description

A Method for Realizing Mirror Image in Switching System

technical field

The invention relates to the technical field of network communication, in particular to a method for realizing mirroring in a switching system.

Background technique

The basic working principle of the switching system based on output queuing is shown in Fig. 1 . In FIG. 1 , InP_0 to InP_n are input source ports of the switching system, and OutP_0 to OutP_n are output destination ports of the switching system. Usually, each output destination port is provided with one or more output queues.

A schematic diagram of an output destination port having multiple output queues is shown in FIG. 2 .

The process of processing data packets by the switching system based on output queuing will be described below with reference to Fig. 1 and Fig. 2 .

In Figure 1 and Figure 2, the switching system receives data packets from multiple input source ports, and extracts key information from the received data packets, such as source MAC, source IP address, etc., and uses the key information as the basis for data exchange to determine The output destination port and output queue number of the data packet, the data packet is arranged in the corresponding output queue of the corresponding output destination port, and the output destination port adopts a certain scheduling algorithm to schedule multiple output queues in its output destination port, and the Packet output in multiple output queues.

In the switching system, the purpose of mirroring is to observe the flow, content, sequence, etc. of the mirrored data. Mirroring includes incoming mirroring and outgoing mirroring.

Incoming mirroring refers to copying all the mirrored data packets input by one or some input source ports, that is, the incoming mirroring source port, and outputting them to a specific output destination port, that is, the incoming mirroring destination port. Out mirroring refers to copying all the mirrored data packets output by one or some output destination ports, that is, the mirrored source port, to a specific output destination port, that is, the mirrored destination port.

The current methods for implementing mirroring in and mirroring out are described below in combination with the accompanying drawings.

The implementation method of mirroring is shown in Figure 3.

In FIG. 3 , InP_0 to InP_5 are six input source ports of the switching system, and OutP_0 to OutP_5 are six output destination ports of the switching system. Among them, OutP_3 is set with 4 output queues, and output queue 0 is set as the input mirror output queue.

The data packet input by the source port of the mirror image is analyzed by the mirror image, copied as it is, and put into the mirror image output queue of the mirror destination port, and the output queue scheduler of the mirror mirror destination port schedules the mirror data packet for output. For example, InP_2 is the mirroring source port, OutP_3 is the mirroring destination port, the output queue 0 of OutP_3 is the mirroring output queue, the white data packet is the mirrored data packet, the gray data packet is the mirrored data packet, and the thin black line is the normal data The flow direction of the packet, the thick black line is the flow direction of the mirrored data packet.

The data packets 0, 1, 2, etc. input from the mirroring source port are copied in sequence, and are sequentially queued into the mirroring output queue 0, and the mirroring data packets are output from the mirroring destination port in the same order.

In the above-mentioned mirroring process, if there is a normal data packet, that is, a non-mirrored data packet, which enters the output queue 0 of the mirrored destination port, the output data packet from the mirrored destination port includes a normal data packet and a mirrored data packet.

The implementation method of mirroring is shown in Figure 4.

In FIG. 4, InP_0 to InP_5 are 6 input source ports of the switching system, and OutP_0 to OutP_5 are 6 output destination ports of the switching system. Among them, OutP_3 is set with 4 output queues, and output queue 0 is set as the mirror output queue.

The data packets input by each input source port are analyzed by the outgoing mirror, and the data packets that need to be discharged into the output queue of the mirrored source port are determined. The queue scheduler of the mirroring destination port schedules and outputs the mirroring data packets. For example, OutP_2 is the mirroring source port, OutP_3 is the mirroring destination port, the output queue 0 in OutP_3 is the mirroring output queue, the white data packet is the mirrored data packet, the gray data packet is the mirrored data packet, and the thin black line is normal The flow direction of the data packet, the thick black line is the flow direction of the mirrored data packet.

Before the mirrored data packets 0, 1, 2, etc. are discharged into the output queue of the mirrored source port, the switching system copies the mirrored data packets, and arranges the copied mirrored data packets into the mirrored output queue in turn, and the mirrored data packets Output from the mirroring destination port in the same order.

In the above mirroring process, if a normal data packet, that is, a non-mirrored data packet, enters the output queue 0 of the mirroring destination port, the output data packet from the mirroring destination port includes a normal data packet and a mirroring data packet.

From the above description of the implementation process of mirroring in and mirroring out, it can be seen that due to the phenomenon that normal data packets and mirrored data packets are mixed in the output queue of the destination port of mirroring in/out of the mirroring destination port, the output queue scheduler cannot control the output queue. The output priority of the normal data packet and the incoming/outgoing mirrored data packet, the output occupied bandwidth, etc., make the output performance of the normal data packet affected by the mirrored data packet. At the same time, in the mirroring process, because the mirrored data packet is copied before entering the output queue of the mirroring source port, the mirrored data packet will be queued into multiple output queues of the mirroring source port, so, After the output of the mirroring source port is scheduled, the output order of the mirrored data packets will change, resulting in the inconsistency between the mirrored data packets output by the mirroring source port and the mirrored data packets output by the mirroring destination port, which is not really implemented. mirroring purpose.

Contents of the invention

The object of the present invention is to provide a method for implementing mirroring in a switching system, and by setting a dedicated mirroring output queue for mirrored data packets, the purpose of improving the output performance of normal data packets is realized.

In order to achieve the above object, a method for realizing mirroring in a switching system provided by the present invention includes:

a. Set a dedicated mirror output queue for mirror data packets on the mirror destination port;

b. storing mirrored data packets sequentially in the mirrored output queue;

c. Sequentially output the mirrored data packets stored in the mirrored output queue from the mirrored destination port.

The mirror image output queue is: entering the mirror image output queue or going out the mirror image output queue;

And the mirrored data packet is: an incoming mirrored data packet or an outgoing mirrored data packet.

The mirroring destination port includes an incoming mirroring destination port, the mirroring output queue includes an incoming mirroring output queue, and the step a includes:

Determining an incoming mirroring destination port corresponding to at least one incoming mirroring source port;

Set the mirroring output queue in the mirroring destination port.

The mirrored data packet includes an incoming mirrored data packet, and the step a also includes:

Setting the mirror output queue scheduler in the mirror image destination port;

And the step c includes:

The mirrored output queue scheduler schedules and outputs the mirrored data packets stored in the mirrored output queue and the data packets scheduled to be output by the output queue scheduler of the mirrored destination port according to a predetermined scheduling rule.

The mirroring destination port includes a mirroring destination port, the mirroring output queue includes a mirroring output queue, and the step a includes:

Determining the mirroring destination port corresponding to at least one mirroring source port;

A mirror output queue is set on the mirror destination port.

The mirrored data packet includes a mirrored data packet, and the step b includes: after the mirrored data packet is dispatched from the output queue of the mirrored source port, copying the mirrored data packet as a mirrored data packet, and transferring the mirrored data packet The outgoing mirroring data packets are sequentially stored in the outgoing mirroring output queue.

The step a also includes: setting a mirror output queue scheduler at the mirror destination port;

And the step c includes:

The mirroring output queue scheduler set by the mirroring destination port schedules and outputs the mirroring data packets stored in the mirroring output queue and the data packets output by the output queue scheduler of the mirroring destination port according to predetermined scheduling rules.

The mirror output queue includes: an input mirror output queue and an outgoing mirror output queue;

And said step a comprises:

Set up mirrored output queue and mirrored output queue in the same output port.

The mirrored data packet includes: an incoming mirrored data packet and an outgoing mirrored data packet, and the step b includes:

Incoming mirroring data packets are sequentially stored in the mirroring output queue;

After the mirrored data packet is dispatched from the output queue of the mirrored source port, the mirrored data packet is copied as the mirrored data packet, and the mirrored data packet is sequentially stored in the mirrored output in queue.

Said step a also includes:

Setting a mirrored output queue scheduler in the output port;

And the step c includes:

The mirrored output queue scheduler schedules the mirrored data packets stored in the mirrored output queue, the mirrored data packets stored in the mirrored output queue, and the output queue scheduler of the output port according to a predetermined scheduling rule. The outgoing packet scheduler output.

By the description of the above-mentioned technical scheme, it can be seen that the present invention makes the scheduler of the mirror image destination port such as the mirror image output queue scheduler etc. It can flexibly control the output priority and output bandwidth of normal data packets and mirrored data packets according to the predetermined scheduling algorithm, avoiding the impact of incoming/outgoing mirrored data packets on the output performance of normal data packets; After the mirrored data packet is discharged into the output queue of the mirror image source port, the present invention can strictly guarantee the consistency of the output sequence of the mirrored data packet and the output sequence of the mirrored data packet, and the purpose of mirroring is really realized; thereby realizing the improvement The purpose of improving data packet transmission performance and improving mirroring reliability.

Description of drawings

Fig. 1 is the basic working principle diagram of the switching system based on output queuing;

Fig. 2 is a schematic diagram of the processing process of data packets based on the switching system of output queuing;

FIG. 3 is a schematic diagram of a method for implementing mirroring in the prior art;

Fig. 4 is a schematic diagram of a method for implementing mirroring in the prior art;

Fig. 5 is a schematic diagram of the implementation method of mirroring in the present invention;

FIG. 6 is a schematic diagram of a method for implementing mirroring in the present invention.

Detailed ways

The core of the present invention is to set a dedicated mirroring output queue for mirroring data packets, store mirroring data packets in the mirroring output queue, and sequentially output the mirroring data packets stored in the mirroring output queue from mirroring destination ports.

The technical solution provided by the present invention will be further described below based on the core idea of the present invention.

The present invention first needs to add a dedicated mirror output queue for mirror data packets in the switching system. This mirror output queue is a separate queue and is structurally separated from other original output queues in the mirror destination port.

Because the mirroring implementation method can be divided into the mirroring implementation method and the mirroring implementation method, the following describes the mirroring implementation method and the mirroring implementation method of the present invention respectively.

In the mirroring process, the dedicated mirroring output queue added by the present invention may be called the mirroring output queue. The mirrored output queue can be configured on any output port in the switching system, and the output port configured with the mirrored output queue is the mirrored destination port.

One or more input ports can be correspondingly configured as the mirroring source ports for the mirroring destination port.

The data packet input from the mirroring source port is analyzed and processed by the mirroring, and the mirrored data packet is copied as the mirroring data packet as it is, and placed in the mirroring output queue.

The present invention also sets the mirror output queue scheduler at the destination port of the mirror image, and the mirror output queue scheduler is independent of the original output queue scheduler of the destination port of the mirror image. .

The output data packets scheduled by the original output queue scheduler of the mirroring destination port and the mirroring data packets stored in the mirroring output queue need to be scheduled by the mirroring output queue scheduler before being output from the mirroring destination port.

The implementation method of mirroring in the present invention will be described below with reference to FIG. 5 .

In FIG. 5 , InP_0 to InP_5 are six input source ports of the switching system, and OutP_0 to OutP_5 are six output destination ports of the switching system. Wherein, since the output queue of the mirroring in the present invention is set in OutP_3, OutP_3 is the destination port of mirroring in.

OutP_3 is set with 5 output queues, including: output queue 0 to output queue 3 and input mirror output queue. Output queue 0 to output queue 3 are the original output queues of the mirroring destination port, which are used to store normal data packets, and the mirroring output queues are dedicated to storing mirrored data packets. It can be clearly seen from FIG. 5 that the input mirror output queue is independent of output queue 0 to output queue 3, and is structurally separated from output queue 0 to output 3.

In the present invention, a mirror image output queue scheduler is set in the mirror image destination port OutP_3. It can be clearly seen from FIG. 5 that the mirrored output queue scheduler is independent of the output queue scheduler in the mirrored destination port OutP_3, and is structurally separated from the original output queue scheduler.

Set the input source port InP_2 as the input mirror source port. The white data packets input from the incoming mirroring source port InP_2 are normal data packets, that is, mirrored data packets, and the gray data packets are incoming mirroring data packets. The thin black line is the flow direction of normal data packets, the thick black line on the left side of the mirror output queue scheduler is the flow direction of incoming mirror data packets, and the thick black line on the right side of the mirror output queue scheduler is the incoming image after being scheduled by the mirror output queue scheduler The common flow of data packets and normal data packets.

The data packets 0, 1, 2, etc. input from the mirroring source port InP_2 are copied into the mirroring data packets 0, 1, 2, etc. in turn after the mirroring analysis, and are sequentially arranged into the mirroring output dedicated to the mirroring data packets. queue.

The mirrored output queue scheduler performs one-level scheduling after the output queue scheduler scheduling of the mirrored destination port, that is, schedules the normal data packets output by the output queue scheduler and the mirrored data packets stored in the mirrored output queue. The normal data packets and mirrored data packets scheduled by the mirrored output queue scheduler are output from the mirrored destination port OutP_3.

The mirrored output queue scheduler can effectively control the output priority and output bandwidth of incoming mirrored data packets and normal data packets according to a predetermined scheduling algorithm, thereby avoiding the problem that the transmission performance of normal data packets is affected by incoming mirrored data packets, and guarantees The output order of the mirrored data packets is strictly consistent with the input order of the mirrored data packets.

In the mirroring process, the dedicated mirroring output queue for the mirrored data packet added by the present invention may be called the mirroring output queue. The mirroring output queue can be configured on any output port in the switching system, and the output port configured with the mirroring output queue is the mirroring destination port.

One or more output ports can be correspondingly configured as mirroring source ports for the mirroring destination port.

The output queue scheduler of the output mirroring source port schedules and outputs the data packets after the output mirroring analysis and processing, and copies the mirrored data packets as the original mirroring data packets, and puts them into the output mirroring output queue, that is, the output mirroring source port The packets are not copied before being enqueued into the output queue of the mirrored source port, but after they are output from the output queue of the mirrored source port.

The present invention also sets the mirror image output queue scheduler at the mirror image destination port, and the mirror image output queue scheduler is independent of the original output queue scheduler of the mirror image destination port. .

The data packets output by the original output queue scheduler of the mirroring destination port and the mirroring data packets stored in the mirroring output queue need to be scheduled by the mirroring output queue scheduler before being output from the mirroring destination port.

The implementation method of mirroring in the present invention will be described below with reference to FIG. 6 .

In FIG. 6, InP_0 to InP_5 are 6 input source ports of the switching system, and OutP_0 to OutP_5 are 6 output destination ports of the switching system. Wherein, since the mirroring output queue of the present invention is set in the output destination port OutP_3, OutP_3 is the mirroring destination port.

The mirroring destination port OutP_3 is set with 5 output queues, including: output queue 0 to output queue 3 and the mirroring output queue. Output queue 0 to output queue 3 are the original output queues of the mirroring destination port, which are used to store normal data packets, and the mirroring output queues are dedicated to storing mirrored data packets. It can be clearly seen from FIG. 6 that the image output queue is independent from output queue 0 to output queue 3, and is structurally separated from output queue 0 to output 3.

The present invention sets a mirror output queue scheduler in the mirror destination port OutP_3. It can be clearly seen from FIG. 6 that the mirroring output queue scheduler is independent of the output queue scheduler in the mirroring destination port OutP_3, and is structurally separated from the original output queue scheduler of the mirroring destination port OutP_3.

Set the output destination port OutP_2 as the mirroring source port. The white data packets output from the mirroring source port OutP_2 are normal data packets, that is, the mirrored data packets, and the gray data packets are mirrored data packets. The thin black line is the flow direction of normal data packets, the thick black line on the left side of the mirrored output queue scheduler is the flow direction of outbound mirrored data packets, and the thick black line on the right side of the mirrored output queue scheduler is the incoming image after being scheduled by the mirrored output queue scheduler The common flow of data packets and normal data packets.

The data packets 0, 1, 2, etc. output from the mirroring source port OutP_2 are copied to the mirroring data packets 0, 1, 2, etc. after the mirroring analysis, and are sequentially discharged into the mirroring output dedicated to the mirroring data packets. queue.

Comparing Fig. 4 and Fig. 6, it can be known that in the prior art, after going through the mirroring analysis, the mirrored data packet is copied before being put into the output queue of the mirroring source port, because the mirrored data packet may be put into the output queue of the mirroring source port. In different output queues of the mirroring source port, the order of the mirrored data packets output by the mirroring source port is different from the order of the mirrored data packets output by the mirroring destination port. And in the present invention, the mirrored data packet exported by the mirror image source port is just copied after going out the mirror image analysis, and the mirrored data packet copied out is arranged in the dedicated mirror image output queue of the mirrored data packet , in this way, it can be strictly guaranteed that the order of the mirrored data packets output by the mirror destination port is exactly the same as that of the mirrored data packets output by the mirror source port.

The mirrored output queue scheduler performs one-level scheduling after the output queue scheduler scheduling of the mirrored destination port, that is, the normal data packets output by the output queue scheduler and the mirrored data packets stored in the mirrored output queue are scheduled. The normal data packets and mirrored data packets scheduled by the mirrored output queue scheduler are output from the mirrored destination port OutP_3.

The mirrored output queue scheduler can effectively control the output priority and output bandwidth of the mirrored data packets and normal data packets according to the predetermined scheduling algorithm, thereby avoiding the problem that the transmission performance of the normal data packets is affected by the mirrored data packets, and Ensure that the output sequence of the mirrored data packets is strictly consistent with the input sequence of the mirrored data packets.

If the in-mirror technology and the out-mirror technology need to be used simultaneously in the switching system, the in-mirror output queue and the out-mirror output queue can be configured on the same output port at the same time.

When the mirroring output queue and the mirroring output queue are configured on the same output port, the output port is both the mirroring destination port and the mirroring destination port. The output port can correspond to multiple incoming mirroring source ports and outgoing mirroring source ports at the same time.

The data packet input from the mirroring source port is analyzed and processed by the mirroring, and the mirrored data packet will be copied as the mirroring data packet as it is, and put into the mirroring output queue of the output port.

The data packets scheduled and output by the output queue scheduler of the mirroring source port are analyzed and processed by mirroring, and the mirrored data packets will be copied as mirroring data packets as they are, and placed in the mirroring output queue of the output port. The mirrored data packet out of the mirroring source port is not copied before entering the output queue of the mirroring source port, but after being output from the output queue of the mirroring source port. Therefore, it is strictly guaranteed that the order of the mirrored data packets output by the mirrored destination port is exactly the same as that of the mirrored data packets output by the mirrored source port.

The output port can also be provided with a mirrored output queue scheduler, which is independent of the original output queue scheduler of the output port, that is, a level of scheduling management for data packet output is added to the output port.

The output data packets scheduled by the original output queue scheduler in the output port, the mirrored data packets stored in the mirrored output queue, and the mirrored data packets stored in the mirrored output queue need to be scheduled by the mirrored output queue scheduler. It is output from the output port, so that the incoming mirror data packet and the outgoing mirror data packet can be conveniently obtained from the same output port.

The mirrored output queue scheduler of the output port can effectively control the output priority and output bandwidth of outgoing mirrored data packets, incoming mirrored data packets and normal data packets according to a predetermined scheduling algorithm, thus avoiding the transmission performance of normal data packets being affected The problem of mirroring data packets and exporting mirrored data packets.

Although the present invention has been described by way of example, those of ordinary skill in the art know that there are many variations and changes in the present invention without departing from the spirit of the invention, and the claims of the application document of the present invention include these variations and changes.

Claims (10)

1. realize the method for mirror image in the switching system, it is characterized in that, comprising:

A, the mirror image output queue of mirror image data bag special use is set at the mirror image destination interface;

B, with mirror image data bag sequential storage in described mirror image output queue;

C, the mirror image data bag of storing in the described mirror image output queue is exported in proper order from described mirror image destination interface.

2. realize the method for mirror image in a kind of switching system as claimed in claim 1, it is characterized in that described mirror image output queue is: go into mirror image output queue or appearance as output queue;

And described mirror image data bag is: go into mirror image data bag or appearance as packet.

3. realize the method for mirror image in a kind of switching system as claimed in claim 1, it is characterized in that described mirror image destination interface includes the mirror image destination interface, described mirror image output queue includes the mirror image output queue, and described step a comprises:

Determine corresponding at least one go into the image source port go into the mirror image destination interface;

Go in the mirror image destination interface to set into the mirror image output queue described.

4. realize the method for mirror image in a kind of switching system as claimed in claim 3, it is characterized in that described mirror image data bag includes the mirror image data bag and described step a also comprises:

Go in the mirror image destination interface mirror image output queue scheduler is set described;

And described step c comprises:

Described mirror image output queue scheduler will be described be gone into the data packet dispatching of storing in the mirror image output queue of going into the mirror image data bag and going into the output queue scheduler schedules output of mirror image destination interface according to predetermined scheduling rule and is exported.

5. as realizing the method for mirror image in the described a kind of switching system of arbitrary claim in the claim 1 to 4, it is characterized in that, described mirror image destination interface comprises appearance as destination interface, and described mirror image output queue comprises appearance as output queue, and described step a comprises:

Determine that corresponding at least appearance that goes out the image source port is as destination interface;

Set out the mirror image output queue in described appearance as destination interface.

6. realize the method for mirror image in a kind of switching system as claimed in claim 5, it is characterized in that described mirror image data bag comprises that appearance comprises as packet and described step b:

After from the output queue that goes out the image source port, being dispatched out by the mirror image data bag, duplicate by the mirror image data bag be appearance as packet, and described appearance is stored in described appearance as in the output queue as packet sequence.

7. realize the method for mirror image in a kind of switching system as claimed in claim 6, it is characterized in that described step a also comprises:

As destination interface mirror image output queue scheduler is set in described appearance;

And described step c comprises:

Described appearance is exported described appearance as packet and appearance as the appearance of storing in the output queue according to predetermined scheduling rule as the mirror image output queue scheduler of destination interface setting as the data packet dispatching of the output queue scheduler schedules output of destination interface.

8. as realizing the method for mirror image in the described a kind of switching system of arbitrary claim in the claim 1 to 4, it is characterized in that described mirror image output queue comprises: go into mirror image output queue and appearance as output queue;

And described step a comprises:

In same output port, set into mirror image output queue and appearance as output queue.

9. realize the method for mirror image in a kind of switching system as claimed in claim 8, it is characterized in that described mirror image data bag comprises: go into mirror image data bag and appearance and comprise as packet and described step b:

To go into mirror image data bag sequential storage goes in the mirror image output queue described;

After from the output queue that goes out the image source port, being dispatched out of appearance picture by the mirror image data bag, duplicate described by the mirror image data bag be appearance as packet, and described appearance is stored in described appearance as in the output queue as packet sequence.

10. realize the method for mirror image in a kind of switching system as claimed in claim 9, it is characterized in that described step a also comprises:

Mirror image output queue scheduler is set in described output port;

And described step c comprises:

Described mirror image output queue scheduler according to predetermined scheduling rule with described appearance as the appearance of storing in the output queue as packet, described data packet dispatching output of going into the output queue scheduler schedules output of going into mirror image data bag and described output port of storing in the mirror image output queue.

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