WO2009059476A1

WO2009059476A1 - A method for distributing the device number in a stacking system

Info

Publication number: WO2009059476A1
Application number: PCT/CN2007/003914
Authority: WO
Inventors: Zheng Zhang
Original assignee: Zte Corporation
Priority date: 2007-11-09
Filing date: 2007-12-29
Publication date: 2009-05-14
Also published as: CN101159672A; CN101159672B

Abstract

A method for distributing the device number in a stacking system includes: when the device leaves the stacking system, the device number of the device is preserved; when the device is joined the stacking system, the preserved device number is used. By using the above method for distributing the device number in a stacking system, the rationalisation and reliability for distributing the device number are improved, and the device number could indicate the priority information and so on. It could be controlled by a person, so the controllability is improved. The enough device numbers are preserved, so it is applied to extend the stacking systemwell. And it has preserving performance, the device number consistency could be maintained and the information stability of the stacking system could be ensured when the stacking device is oscillating. Thus the reliability and stability of the stacking system are improved greatly, then the management of the stacking system is easier, and the controllability is higher.

Description

Method for allocating stacking device number

Technical field

The present invention relates to the field of data communications, and in particular, to a method for allocating device numbers of a stacking system.

Background technique

The routing switching device is the most important and core component of the Internet. It is responsible for the route propagation and traffic forwarding of the Internet. The routing and switching equipment includes routers and switches. The administrator determines the deployment of routers and switches according to the network planning. As the network scales larger and larger, there are more and more routing and switching devices, and its management complexity increases exponentially. There is already a means for configuring a group of devices that are related to a network. You can use it as a device for configuration management. There is no need to configure dynamic routing protocols, device interconnections, etc. between these devices. The overhead of the device, such as memory and processor, can be reduced to the most <. This method is stacking. The entire stacking system is a device from the outside world. Generally, a stack system includes a master device, a standby device, and other common devices (also called member devices).

The most important point of stack system management is that after the entire stacking system is established, the stacking device number must be assigned to the devices in the stacking system. This device number can be used not only as a simplified code for each device, but also for For the purpose of generating internal communication addresses and other important uses, the device number is a vital part of the implementation of the stacking system and is generally assigned by the master device. Therefore, the rationality and reliability of the assignment of device numbers in a stacking system is the most important part of the implementation of the stacking system.

Traditional stacking system device numbers are assigned in two ways:

As shown in Figure 1, this allocation method is a direct sequential allocation method. The master device in the stacking system performs device number assignment to all devices in turn, and the assigned device number is from small to large. This allocation method is the device number. It does not have special meaning. It is only the device identification in the stacking system. The manager can not see other characteristics of the device from the surface of the device number, such as whether it is a better device.

As shown in Figure 2, this method of allocation is a distance representation. It is a geographical location-based allocation method. The master device in the stack system allocates device numbers to all devices in turn, and the device with the smaller device number indicates that the distance from the master device is closer. This method of distribution makes The device number has a certain meaning, and it is more suitable for a very stable stacking system. However, if a stacking system is expanded and a new device is added, the order of assigning the device number will be disrupted, and the identification distance will also be lost. The meaning. For example, the device number in the stacking system has been allocated, and the device number shows the distance from the master device with device number 1. However, when the stack system is expanded, for example, when a new device is added between the device number 2 and the device number 4, the device number can only be assigned to 9, and the device number 9 has been lost between the master device and the master device. The meaning of distance.

As shown in Figure 3, this is a stacking system that has been assigned a device number, but one of the devices is unstable. It is always repeatedly removed and added to the stacking system, showing an oscillating state. Each time the primary device rejoins the stacking system, the primary device assigns a new device number to the device. For example, in the figure, the device with the initial device number 4 is added to the stacking system because it is unstable. The device number went through 9, 10 to 11. Because of the instability of the device, the number of the assigned stack is variable. As a result, other devices in the stack system need to update the information about the unstable device with the master device. As a result, the information of the stack system is turbulent, which is not conducive to the stability of the stack system. .

In summary, the device number of the stacking system should reflect the priority of the device, etc., and it is easy to adapt to the expansion of the stacking system, and it is easy to keep the information of the stacking system stable. Therefore, the device number allocation mode of the stacking system is more reasonable and reliable, and the stability of the stacking system is enhanced. Summary of the invention

The technical problem to be solved by the present invention is to provide a method for allocating device numbers of a stacking system, which can improve the controllability of the stacking system, easily adapt to the expansion of the stacking system, and maintain the information stability of the stacking system.

In order to solve the above problems, the present invention provides a method for allocating a device number of a stacking system, including:

When the device leaves the stack system, it retains the device number assigned to the device; when the device joins the stack system again, it uses the device number reserved for it.

Further, the stacking system includes a master device, a standby device, and a member device, and the method includes:

When a member device leaves the stack system, the master device of the stack system is reserved for the member device. The device number of the device is allocated to the member device when the member device is added to the stack system.

When the primary device leaves the stacking system, the standby device retains its device number; when the primary device joins again, it assigns the reserved device number to it.

Further, the method for allocating further includes:

When no device number is assigned to a newly joined member device, the master device assigns the device number of the member device that leaves the system to the newly joined member device.

Further, the method for allocating further includes:

The information that the master device assigns the device number to each device in the stack system includes the priority and media access control address, or any one of them.

Further, the method for allocating further includes:

The master device of the stack system reserves the number when performing device number assignment.

Further, the method for allocating further includes:

The device number used for the allocation is divided into a plurality of number segments, and each number segment corresponds to a different priority; each device is assigned a device number in a number segment corresponding to its priority; and a number of reserved in each number segment The device number is assigned to the member device that is newly added to the stacking system.

Further, the method for allocating further includes:

Assigning the device number in the number segment corresponding to the priority of each stack device means that the device numbers in the number segment are randomly or randomly assigned to devices with corresponding priorities.

Further, the method for allocating further includes:

The master device records the device number of the member device in the order of leaving the stack system. When the member device joins, the device number is deleted from the device record. When no device number is assigned to the newly added member device, the device records the most. The device number of the member device that leaves the system first is assigned to the new member device.

Further, the method for allocating further includes:

When a member device leaves the stack system, the master device starts timing. When the member device joins again, it stops timing and restores the timer to 0. When no device number is assigned to the newly added member device, The device number of the member device that has left the longest time is assigned to the new member device.

Further, the method for allocating further includes:

Set a time threshold and save it in the master device. When the member device leaves the stack system, the master device starts timing from 0. When the member device joins again, it stops timing and restores the timer to 0. When a member device corresponds to more than one timer. When the threshold is set, the corresponding device number is added to the candidate device number queue. If the member device is added, the device number is deleted from the candidate queue; when no device number is assigned to the newly added member device. , Select one of the alternate device numbers to assign.

Further, the method for allocating further includes:

The master device and the standby device store the correspondence between the device number of the member device and the media access control address;

When the member device leaves the stack system, the master device of the stack system retains the device number assigned to the member device. When the member device joins the stack system, the master device accesses the control address and the device according to the member device. The saved relationship is assigned to the reserved device number. When the primary device leaves the stack system, the standby device retains the device number of the primary device as the current primary device of the stack system. When it joins the stack system, The current master device allocates the reserved device number according to its media access control address and the saved correspondence.

The device number allocation method of the stacking system described above implements the routing switching device to form a stacking system. When assigning the device number, attention is paid to the rationality and reliability of the device number allocation, so that the information represented by the device number is more and can be manually controlled. , to make the controllability stronger; and to have sufficient reservation, so that the allocation of the device number can be easily adapted to the expansion of the stacking system; and also has a retention feature, which is easy to keep the information of the stack system stable, thereby enhancing the stacking system. Reliability and stability.

The method for assigning the device number of the stacking system provided by the present invention makes the allocation of the device number more reasonable and reliable, and the device number can identify the priority of the device and the like; and can be artificially controlled to make the controllability stronger; The number is fully reserved and can be applied to the expansion of the stacking system. It also has a retention feature that keeps the device number unchanged when the stack system is oscillating, ensuring the stability of the stack system. The stability and stability are greatly enhanced, making the management of the stacking system more compact and controllable. BRIEF abstract

1 is a device number diagram of a stacking system in a conventional sequential manner in the prior art; FIG. 2 is a schematic diagram of a stacking system device number in a prior art according to a distance from a master device; FIG. 3 is a stacking method in the prior art. FIG. 4 is a flow chart in an application example of the present invention;

5(a) to (e) are schematic diagrams showing the result of the assignment of the device numbers of the respective steps in the application example of the present invention.

Preferred embodiment of the invention

The technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

The main idea of the method for allocating the device number of the stacking system of the present invention is to enable the device number to identify information such as the priority of the device, and to perform artificial control to make the controllability stronger; the sufficient reserved number segment function is very good. Applicable to the expansion of the stack system. The number segment function is used to keep the information of the stack system stable when the stack system is turbulent. Therefore, the allocation of the device number is more rational and reliable, and the controllability and stability of the stacking system are enhanced.

The method for allocating the device number of the stacking system of the present invention includes:

The device number retention scheme is used to ensure the stability of the stack information. The specific steps are as follows: The master device and the standby device save the mapping between the device number of the member device and the MAC (Media Access Control) address. When the system is removed from the stack system for some reason, the master device of the stack system retains the device number assigned to the member device. When the member device joins the stack system, the master device saves the MAC address of the member device according to the member device. The corresponding relationship is assigned to the member device whose reserved device number. When the primary device leaves the stacking system, the standby device retains its device number as the current primary device of the stacking system; when the outgoing primary device joins again, although it does not necessarily become the primary device, it is still reserved for its allocation. The device number, that is, the device number of the master device is the same as the original one.

It can be seen that when a member of the stack system needs to leave and join the stack system, such as a device upgrade, and the device is in an oscillating state, the assigned device number is temporarily reserved. If the member device leaves the stacking system, if there is a new device. Joining the stack system, you cannot use the device number of the leaving member; based on this mechanism, when the leaving member device returns to the stack system, the previous device can still be used. The assigned stacking device number.

Of course, if the number that can be assigned is insufficient, and all the system extensions are used, when the device number is not assigned to the newly joined member device, the master device will leave the device number assignment of the member device with a long system time. Give the newly added member device; the specific implementation method can be any of the following:

(1) The master device records the device number of the member device in the order of leaving the stacking system. When the member device joins, the device number is deleted from the device record. When no device number is assigned to the newly added member device, the device is removed. The device number of the member device that leaves the system first in the record is assigned to the new member device.

(2) When the member device leaves the stacking system, the master device starts timing. When the member device joins again, it stops timing and restores the timer to 0. When no device number is assigned to the newly joined member device, it will leave the longest time. The device number of the member device is assigned to the new member device.

(3) Set a time threshold and save it in the master device. When the member device leaves the stacking system, the master device starts timing from 0. When the member device joins again, it stops timing and restores the timing to 0. When a member device When the corresponding timing exceeds the threshold, the corresponding device number is added to the candidate device number queue. If the member device joins, the device number is deleted from the candidate queue; when no device number is assigned to the new join When you are a member device, select one of the alternate device numbers to assign. The time threshold can be artificially selected according to the actual situation, such as the maximum time that the device may leave the stack system when it is in an oscillating state.

The actual application is not limited to the above implementation manner, and only the reference is given here.

Of course, as long as the number that can be assigned when the system is planned is sufficient, there will be no reuse of the stacked device number.

The stability of the device number ensures that the information of the stack system is stable and the management of the stack system is simpler.

The method for allocating the device number of the stacking system of the present invention may further include: the master device assigns the device number according to the priority and/or the MAC address of each device in the stacking system; and may, but is not limited to, assign the device with the higher priority to a smaller device. Device No. The priority of the stack system device can be determined automatically by the system or manually. This can affect the device priority by affecting the device priority.

The specific steps are as follows: The device priority of the stacking system can be automatically set by the system. That is, all devices have the same priority according to the default. However, the importance of the devices in the stacking system is generally different, so the priority is also different, which can affect the election of the master device and the allocation of the device number. For example, a device that is important to certain locations or has a very stable stability can be manually configured to give priority to other devices, so that the device can be elected as the master device and facilitate the management of the stacking system.

The method for allocating the device number of the stacking system of the present invention may further include: when the device of the stacking system allocates the device number, the number is reserved; that is, after each number is assigned, some numbers are reserved and are not allocated, When a new member device joins, the reserved number is assigned to the new member device.

The scheme of the reserved number and the foregoing scheme for assigning numbers according to the priority and/or the MAC address may be used alone or in combination; the combined use is: dividing the device number for allocation into several number segments, each The number segment corresponds to a different priority, or a MAC address, or a combination thereof; each device is assigned a device number in a number segment corresponding thereto; and a number of device numbers are reserved in each number segment without being allocated; The device ID of the stack system in the future is not disturbed. The device number in the number segment corresponding to each stack device is: When the device number is assigned according to the priority, the specific steps include:

According to the priority information of all the stacking devices, it can be specified that the device number assigned to the highest priority device is located in an optimal number segment. For example, the master device itself is the device with the highest priority, so its own device number is 1, and other priorities are given. Devices of the same high level are assigned in the optimal number segment between 2 and 10.

For the sub-optimal device, similar to the device with the highest priority, the reserved allocation of the sub-optimal number segment can be performed between 11 and 20; also for the device with the same priority, the allocation method is similar, and can be set to 21 after that.

The case where the device number is assigned according to the MAC address or the like is similar and will not be described again. Of course, the number segment definition can be adjusted according to the actual stacking system. For example, in a large-scale stacking system, the optimal device number segment can be set from 1 to 30; meaning that 30 device numbers are reserved. The device with the highest priority; the device with the lower priority is between 31 and 70, which means that 40 device numbers are reserved for the second-priority device;

In this way, the device number of the stack system can reflect the device priority of the stack system, etc., so that the device number is not only the device number, but has other meanings such as priority; A sufficient reservation is obtained. Even after the stacking system is expanded, the stacking device number information is not disturbed, so that the stacked device numbers have a stable and long-term meaning.

When combined with the device number retention scheme in the previous section, the stacking device number can fully reflect the device priority of the stacking system, and fully cope with the expansion of the stacking system. Moreover, the stacking system can still maintain the stacking system information when the stacking device is turbulent. stable.

The following is further illustrated by an application example of the present invention.

The steps in the device number assignment phase are shown in Figure 4, including:

Step 401: The stacking system is stable. After the topology is established, the master device of the stacking system first assigns the device number to the device with the highest priority, and sets the number segment for the device with the highest priority to be 2 to 10; The device number is 1; the result of the distribution is shown in Figure 5 (a).

Step 402: The master device of the stacking system allocates the device number to the stacking device with the lower priority, and the reserved number segment of the device with the lower priority is set to 11 to 20; the allocation result is shown in Figure 5 (b).

Step 403: The master device allocates the device number to the stacking device with the lowest priority, and the reserved segment number of the device with the lowest priority is 21 or later; the allocation result is shown in Figure 5 (c).

Step 404: After the stacking number is allocated, when the stacking system adds a certain device to the device with the device number 2 and the device number 3, the priority of the newly added device is the lowest, so according to the device number allocation principle, the priority is used. The device numbers in the lowest reserved number segment are sequentially or randomly assigned; the allocation result is shown in Figure 5 (d).

Step 405: If the device whose initial device number is assigned to 21 oscillates due to device upgrade or other reasons, the reserved device number 21 is still used each time the device is rejoined to the stacking system, and the allocation result is as shown in FIG. 5(e). The device number allocation method of the routing switching device stacking system described in this document can be used to identify the priority of the device and other information. The control can be performed manually to make the controllability stronger. The method of reserving the device number can be very good. Applicable to the expansion of the stacking system; the function of retaining the device number enables the information of the stacking system to remain stable while the device is oscillating. Thereby, the reliability and stability of the stacking system are greatly enhanced, and the management of the stacking system is simplified, and the controllability of the stacking system is improved.

It is a matter of course that the invention may be embodied in various other forms without departing from the spirit and scope of the invention.

Industrial applicability

The device number allocation method of the stacking system of the present invention is used for the allocation of the device number of the stacking system formed by the routing switching device, so that the allocation of the device number is more rational and reliable.

Claims

Claim

A method for allocating a device number of a stacking system, comprising:

The method according to claim 1, wherein the stacking system includes a master device, a standby device, and a member device, and the method specifically includes:

When the member device leaves the stack system, the master device of the stack system retains the device number assigned to the member device; when the member device joins the stack system, the master device allocates the device number reserved for the member device to the member device. ;

The distribution method according to claim 1, further comprising:

The distribution method according to claim 1, or 4, or 5, wherein: the device number used for the allocation is divided into a plurality of number segments, each of the number segments corresponding to a different priority; The device number in the number segment corresponding to the priority; and a number of device numbers are reserved in each number segment to be allocated to the member devices newly joined to the stack system.

7. The method of dispensing of claim 6 wherein: Assigning the device number in the number segment corresponding to the priority of each stack device means that the device numbers in the number segment are randomly or randomly assigned to devices with corresponding priorities. :

8. The method of dispensing according to claim 3, wherein:

9. The method of dispensing of claim 3, wherein:

When the member device leaves the stack system, the master device starts timing. When the member device joins again, it stops timing and restores the timer to 0. When no device number is assigned to the newly added member device, the member device with the longest time is left. The device number is assigned to the new member device.

10. The method of dispensing of claim 3, wherein:

Set a time threshold and save it in the master device. When the member device leaves the stack system, the master device starts timing from 0. When the member device joins again, it stops timing and restores the timer to 0. When a member device corresponds to more than one timer. When the threshold value is added, the corresponding device number is added to the candidate device number queue. If the member device joins, the device number is deleted from the candidate queue; when no device number is assigned to the newly added member device When selecting one of the alternate device numbers for allocation.

11. The method of dispensing according to claim 1 or 2, characterized by:

When the member device leaves the stack system, the master device of the stack system retains the device number assigned to the member device. When the member device joins the stack system, the master device accesses the control address and the device according to the member device. The saved relationship is assigned to the reserved device number. When the primary device leaves the stack system, the standby device retains the device number of the primary device as the current primary device of the stack system. When it joins the stack system, The current master device allocates the reserved device number according to its associated access control address and the saved correspondence.