WO2012034408A1

WO2012034408A1 - Method and system for processing media access control address aging

Info

Publication number: WO2012034408A1
Application number: PCT/CN2011/074526
Authority: WO
Inventors: 郭亮; 苗贝
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-17
Filing date: 2011-05-23
Publication date: 2012-03-22
Also published as: CN101969398A

Abstract

The invention discloses a method and a system for processing media access control (MAC) address aging. The method includes following steps: sequentially obtaining MAC address entries from a local MAC address table by a global system; judging the aging states of the MAC address entries in all subsystems; notifying all the subsystems to age the MAC address entries when the MAC address entries in all the subsystems are in aging states; otherwise keeping the MAC address entries in all the subsystems alive. The invention improves the performance and the processing capability of the system.

Description

The present invention relates to the field of communications, and in particular, to a method and system for aging processing of a Media Access Control (MAC) address. Background technique

The MAC address is an identifier of a local area network (LAN) node, and its interface with a device (for example, a network card) is globally unique. Typically, the MAC address is 48 bits and is represented by 12 hexadecimal numbers. The first 6 numbers are managed by the Institute for Electrical and Electronic Engineers (IEEE) to identify producers. Or the manufacturer, which constitutes the Organizational Unique Identifier (OUI), and the last six numbers generally include the network card serial number or the setting value of a specific hardware manufacturer. Here are a few of the four related to the MAC address:

(1) MAC address learning: The source MAC address of each received message is stored in the virtual LAN Local Area Network (VLAN) for subsequent delivery of the address. Forward to the interface where this address is located, not to all interfaces that are forwarded to the VLAN. It can be seen that the MAC address learning is to allow the message to be forwarded to the designated port after reaching the device, thereby reducing the amount of traffic in the LAN, which is helpful for ^! The business volume of the LAN connected to it is the smallest ^^

(2) MAC address aging: After a period of time (for example, a predetermined aging time), the MAC address is deleted. Because each MAC address needs to occupy actual hardware and software resources, when a MAC address does not exist, it is necessary to delete and release the hardware and software resources.

(3) MAC address keep-alive: If the MAC address is received within a predetermined period of time (for example, aging time), then the MAC address should not be learned (already exist) and should not be aged. The predetermined time period can be reset and the timing can be restarted. 1 is a schematic diagram of the relationship between subsystems and management systems in a distributed system according to the related art, as shown in FIG. 1, for a distributed network device learned on a subsystem (subsystem 1, port 12) After the MAC address, the MAC address needs to be synchronized to all other subsystems through the subsystem synchronization module, so that other subsystems can receive the 4 addresses of the MAC address. After that, it can be forwarded to the port corresponding to the learned MAC address (subsystem 1 on port 12). If there is always a flow in this MAC address on port 12 of subsystem 1, then this MAC address needs to be reserved on all subsystems and cannot be deleted, since only the data stream of the source MAC address is received on port 12 of subsystem 1. In order to be kept on subsystem 1, so other subsystems that cannot receive such traffic will have a "^ _ aging" process. For example, after receiving the "^ _ aging" message, the software still has a hardware MAC address entry. Therefore, it is first determined whether the port in the MAC address table is on the subsystem. If not, ignore it. This news. Therefore, the MAC address on other subsystems will not be deleted. This is the principle that only the home subsystem can initiate aging. That is, the MAC address deletion on other subsystems needs to wait on subsystem 1. The MAC address is not kept live, and the MAC address table management module is notified. The MAC address table management module deletes the corresponding MAC address on all subsystems. However, there is an aggregation port in a Layer 2 network device. This aggregation port is a logical concept. It is a collection of physical ports. The physical ports in an aggregation port can be on different subsystems. The aggregation port has no attribution information, or the home address of the aggregation port is all subsystems. The MAC address learned on the aggregation port, the corresponding egress port is an aggregation port, not a physical port, so that all The subsystems have the right to initiate aging. It can be seen that the principle of keeping the MAC address of the common port does not apply at this time, because the aggregation port does not belong to any subsystem (the physical port of a member of an aggregation port can be on multiple subsystems at the same time), if the subsystem belongs to the port. Keep alive, unless all of the aggregated ports have member ports on all subsystems, and all ports can receive the data stream for keep-alive, otherwise there must be a corresponding MAC address table on a certain subsystem. There is no way to keep the item alive. Moreover, in this case, the normal port can not veto the "false aging" message by judging the subsystem to which the port belongs, as in the case of "false aging", so the MAC address table management module deletes the "this could not be deleted, (Other subsystems may have the keepalive traffic of the aggregated port). After the MAC address is deleted, the data flow with the MAC address as the destination MAC address is flooded on the Layer 2 device, increasing the bandwidth occupancy. SUMMARY OF THE INVENTION The main purpose of the present invention is to provide a MAC address aging processing scheme to solve at least the above-mentioned aggregation port in a Layer 2 network device, because the corresponding MAC address entry cannot be obtained on some subsystems. The problem of increased bandwidth occupancy due to being kept alive. In order to achieve the above object, according to an aspect of the present invention, an old method of processing a MAC address is provided. The aging processing method of the MAC address according to the present invention includes the following steps: The global system sequentially obtains a MAC address entry from a local MAC address table; determines an aging state of the MAC address entry in all subsystems; If the aging status of the MAC address entry is all aging, notify all subsystems to age the MAC address entry; otherwise, keep the MAC address entries in all subsystems. Preferably, before determining the aging state of the MAC address entry in all subsystems, the method further includes: the global system receiving the aging message or the keep-alive message of the MAC address entry from the subsystem, acquiring and recording in the subsystem The aging status of the MAC address entry. Preferably, before the global system receives the aging message or the keep-alive message from the MAC address entry of the subsystem, the method further includes: if the subsystem changes the aging state of the MAC address entry in the subsystem MAC address table thereof And sending an aging message or keep-alive message of the MAC address entry of the aging state change in the subsystem MAC address table to the global system. Preferably, before the subsystem sends the aging message or the keep-alive message of the aging state changed MAC address entry in the subsystem MAC address table to the global system, the method further includes: the MAC address entry in the subsystem MAC address table If the aging state is inconsistent before and after the update, the subsystem determines that the old state of the MAC address entry has changed. Preferably, before the subsystem determines that the aging status of the MAC address entry has been changed, the method further includes: when the subsystem receives the keep-alive message of the MAC address entry in the subsystem MAC address table, the The aging status of the entry is updated to keep alive. When the aging time of the MAC address entry in the subsystem MAC address table is reached, the aging status of the MAC address entry is updated to aging. In order to achieve the above object, according to another aspect of the present invention, an aging processing system for a MAC address is provided. The aging processing system of the MAC address according to the present invention includes a global system and a plurality of subsystems, wherein the global system includes: an obtaining module, configured to sequentially obtain a MAC address entry from the global system MAC address table; In order to determine the aging state of the MAC address entry in all subsystems, the aging module is configured to notify all subsystems to age when the determining module determines that all the aging states of the MAC address entries in the subsystem are aging. MAC address entry; and The live module is configured to keep the MAC address entries in all subsystems in a case where the judging module determines that the aging states of the MAC address entries in all subsystems are not all aging. Preferably, the global system further includes: a receiving module, configured to receive an aging message or a keep-alive message of the MAC address entry from the subsystem; and a recording module, configured to: according to the aging message of the MAC address entry received by the receiving module Or keep alive message, obtain and record the aging status of the MAC address entry in the subsystem. Preferably, each of the plurality of subsystems comprises: a sending module configured to send to the global system in the subsystem MAC address table if the aging state of the MAC address entry in the subsystem MAC address table is changed The aging message or keep-alive message of the MAC address entry whose aging status is changed. Preferably, each of the plurality of subsystems further comprises: a determining module, configured as a subsystem

If the aging status of the MAC address entry in the MAC address table is inconsistent before and after the update, the aging status of the MAC address entry is changed. Preferably, each of the plurality of subsystems further includes: an update module configured to: when receiving the keep-alive message of the MAC address entry in the subsystem MAC address table, the aging state of the MAC address entry Update to keep-alive; and update the aging status of the MAC address entry to aging when the aging time of the MAC address entry in the subsystem MAC address table arrives. The invention solves the problem that when the aging state of the same MAC address in all subsystems is aging and then aging, the aggregation port exists in the layer 2 network device, due to some subsystems. The corresponding MAC address entry cannot be saved and the bandwidth occupancy rate increases, which improves the performance and processing capability of the system. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a relationship between subsystems and management systems in a distributed system according to the related art; FIG. 2 is a flowchart of a method for processing aging of MAC addresses according to an embodiment of the present invention; 3 is a structural block diagram of an aging processing system for a MAC address according to an embodiment of the present invention; FIG. 4 is a structural block diagram of an aging processing system for a MAC address according to a preferred embodiment of the present invention; FIG. 5 is a preferred embodiment of the present invention. Flowchart of the processing of the global system of the first embodiment; Fig. 6 is a flowchart of the processing of the subsystem of the preferred embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. According to an embodiment of the present invention, a method for processing an aging of a MAC address is provided. FIG. 2 is a flowchart of a method for processing aging of a MAC address according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps: Step S202: The global system sequentially obtains a MAC address table from a local MAC address table. Step S204, determining the aging state of the MAC address entry in all the subsystems; Step S206, informing all the aging MAC address entries of all the subsystems in the case that the aging states of the MAC address entries in all the subsystems are all aging ; Otherwise, keep the MAC address entries in all subsystems. Through the above steps, when the aging status of the same MAC address in all subsystems is aging and then aging, the aggregation port is found in the Layer 2 network device, because some subsystems The corresponding MAC address entry cannot be saved and the bandwidth occupancy rate increases, which improves the performance and processing capability of the system. Preferably, before step S204, the global system receives an aging message or keep-alive message from the MAC address entry of the subsystem, and obtains and records the aging status of the MAC address entry in the subsystem. The method can obtain the real-time status of the MAC address entries in the global system MAC address table in each subsystem, thereby improving the effectiveness and accuracy of the system. In the implementation process, the subsystem may send an aging message or a keep-alive message of the MAC address entry of the subsystem to the global system, and the global system records the aging state record of the MAC address entry according to the received message. System MAC address table. For example, the subsystem may actively send an aging message or a keep-alive message of the MAC address entry of the subsystem, or may be a global system periodically scans the MAC address entries in the MAC address table of each subsystem, according to each subsystem MAC address table. The aging status of the MAC address entry in the global system is updated. The aging status of the corresponding MAC address entry in the global system MAC address table is updated. Preferably, before the global system receives the aging message or the keep-alive message from the MAC address entry of the subsystem, the subsystem sends the aging status of the MAC address entry in the subsystem MAC address table to the global system. An aging message or keep-alive message of the MAC address entry changed by the aging state in the subsystem MAC address table. In this way, the current state of the MAC address entry in the subsystem MAC address table can be notified to the global system, so that the global system performs corresponding processing, thereby improving the performance of the system. Preferably, the aging status of the MAC address entry in the subsystem MAC address table is updated before the subsystem sends the aging message or the keep-alive message of the aging status changed MAC address entry in the subsystem MAC address table to the global system. In the case of inconsistency, the subsystem determines that the aging status of the MAC address entry has changed. The method can update the aging state of the MAC address entries in the subsystem MAC address table and update in real time, thereby improving the real-time and effectiveness of the system. Preferably, before the subsystem determines that the aging status of the MAC address entry has been changed, the subsystem ages the MAC address entry when receiving the keep-alive message of the MAC address entry in the subsystem MAC address table. The state is updated to keep alive; when the aging time of the MAC address entry in the subsystem MAC address table is reached, the aging status of the MAC address entry is updated to aging. The method is simple to implement and has high operability. Corresponding to the above preferred embodiment, an aging processing system for a MAC address is also provided in this embodiment. FIG. 3 is a structural block diagram of an aging processing system for a MAC address according to an embodiment of the present invention. As shown in FIG. 3, the MAC address aging processing system includes a global system 32 and a plurality of subsystems 34, wherein the global system 32 includes The acquisition module 3202, the determination module 3204, the aging module 3206, and the keep-alive module 3208 are described in detail below. The obtaining module 3202 is configured to sequentially obtain the MAC address entry from the global system MAC address table. The determining module 3204 is coupled to the obtaining module 3202, and configured to determine the aging state of the MAC address entry in all the subsystems 34. The aging module 3206 The method is coupled to the determining module 3204, and configured to notify all subsystems 34 to age the MAC address entry when the determining module 3204 determines that the aging states of the MAC address entries in all the subsystems are all aging; and the keep-alive module 3208, Judgment mode Block 3204, configured to preserve the MAC address entries in all subsystems 34 in the event that the determining module 3204 determines that the aging states of the MAC address entries in all of the subsystems 34 are not all aging. In the embodiment of the present invention, when the aging state of the same MAC address in all the subsystems 34 is aging, the aging mode is used to solve the problem that the aggregation port exists in the Layer 2 network device. The performance of the system and the processing capability are improved because the corresponding MAC address entries on some subsystems cannot be kept alive and the bandwidth occupancy rate increases. 4 is a structural block diagram of an aging processing system for a MAC address according to a preferred embodiment of the present invention. As shown in FIG. 4, the global system 32 further includes: a receiving module 3210 configured to receive a MAC address entry from the subsystem 34. The aging message or the keep-alive message; the recording module 3212 is coupled to the receiving module 3210, configured to acquire and record the MAC address entry in the subsystem 34 according to the aging message or the keep-alive message of the MAC address entry received by the receiving module 3210. Aging state. Preferably, each of the plurality of subsystems 34 includes: a transmitting module 3402 configured to transmit to the global system 32 the subsystem in the event that the aging state of the MAC address entry in the subsystem 34 MAC address table is changed. The aging message or keep-alive message of the MAC address entry changed by the aging state in the MAC address table. Preferably, each of the plurality of subsystems 34 further includes: a determining module 3404 coupled to the sending module 3402, configured to set the aging state of the MAC address entries in the MAC address table of the subsystem 34 inconsistent before and after the update , determine that the aging status of the MAC address entry has changed. Preferably, each of the plurality of subsystems 34 further includes: an update module 3406 coupled to the determination module 3404, configured to receive the keep-alive message of the MAC address entry in the subsystem 34 MAC address table Update the aging status of the MAC address entry to keep alive; and update the aging status of the MAC address entry to aging when the aging time of the MAC address entry in the MAC address table of the subsystem 34 arrives. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. Preferred Embodiment 1 This embodiment provides a method for correctly aging a MAC address in a distributed system in which the aggregation port MAC address attribution is difficult to confirm. Since the keepalive and aging of the MAC address of this aggregation port are implemented on each subsystem, it is subject to the inability to know other subsystems. Whether the MAC address is kept live, so it can be implemented by a mechanism that manages whether the MAC address on all subsystems of the arbitration system needs to be aged on the global system. 5 is a process flow diagram of a global system in a preferred embodiment of the present invention. As shown in FIG. 5, the process flow in the global system may include the following steps: Step 4: S502, start global aggregation port MAC address management. Module. In a specific implementation process, the aging processing method of the MAC address in the global system may be implemented by the global aggregation port MAC address management module. Step S504, determining whether there is a MAC address entry in the global system MAC address table (that is, whether the global system MAC address table is not empty). If yes, go to step S506, otherwise, end the flow. Step S506, scanning a MAC address entry in the global system MAC address table (ie, some

MAC address entry ;). Step S508, extracting an aging message or a keep-alive message of the MAC address entry in all subsystems corresponding to the scanned MAC address entry. In the implementation process, the global system may receive an aging message or a keep-alive message corresponding to the MAC address entry in the global system MAC address table sent by each subsystem. Step S510, recording an aging state of the MAC address entry in all subsystems according to the extraction result. In step S512, it is determined whether the aging status of the MAC address entry in all subsystems is "aging". If yes, go to step S514, otherwise, go to step S516. It should be noted that, in the specific implementation process, after processing the MAC address entry, you can go back to step 4 to gather S504, and when the global system MAC address table is empty, scan another global system MAC address table. The MAC address entry is similarly handled. Step S514, informing all subsystems to age the MAC address entry. For example, the MAC address entry is deleted from the respective subsystem MAC address table. Step 4 gathers S516 to keep the corresponding MAC address entries on all subsystems alive. Preferred embodiment two This embodiment describes the aging process of MAC address entries in each subsystem in detail. 6 is a processing flowchart of a subsystem in a preferred embodiment 2 of the present invention. As shown in FIG. 6, the processing flow in the subsystem may include the following steps: Step S602: Scanning the MAC in the subsystem MAC address table An address entry (that is, a MAC address entry). For example, it may be a MAC address entry in the subsystem timing scan subsystem MAC address table. Step S604, determining whether the subsystem receives the keep-alive message of the MAC address entry. If yes, go to step S606. Otherwise, when the aging time of the MAC address entry arrives, the subsystem goes to step S608. Step S606, the aging status of the MAC address entry in the recording subsystem is "keep alive" (that is, the aging status of the MAC address in the update subsystem is "keep alive"). Step S608, recording the MAC address in the subsystem The aging state of the entry is "aging." Step S610, obtaining the last aging state of the MAC address entry in the subsystem. Step S612, determining the two states of the MAC address entry (that is, the MAC address before and after the update) Whether the aging state is consistent, if yes, the process is terminated, otherwise, the process goes to step S614. Step S614, the aging or keep-alive message of the MAC address entry is sent to the global system in the current state. During the implementation process, the global system periodically scans the MAC address entries in the MAC address table of each subsystem to update the global system MAC address according to the aging status change of the MAC address entries in the MAC address table of each subsystem. The aging status of the corresponding MAC address entry in the table. In summary, the embodiment of the present invention relates to learning and keeping alive of a MAC address of a Layer 2 network device, which is in a distributed system. In the case where the port MAC address attribution is difficult to confirm, a solution for the MAC address keep-alive is solved, and the performance and processing capability of the system are improved. Obviously, those skilled in the art should understand that the above modules or modules of the present invention are The steps may be implemented in a general-purpose computing device, which may be centralized on a single computing device or distributed across a network of multiple computing devices, which may alternatively be implemented by program code executable by the computing device. Thereby, they can be stored in the storage device by the computing device, and in some In this case, the steps shown or described may be performed in an order different from that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. An old ^ ^ processing method for a MAC address, including the following steps:

The global system obtains the MAC address entry from the local MAC address table in sequence; and determines the aging state of the MAC address entry in all subsystems;

In the case that all the aging states of the MAC address entries are aging in all subsystems, all subsystems are notified to age the MAC address entries; otherwise, the MAC address entries in all subsystems are guaranteed.

The method according to claim 1, wherein before determining the aging state of the MAC address entry in all the sub-systems, the method further includes:

The global system receives an aging message or keep-alive message from the MAC address entry of the subsystem, and obtains and records an aging status of the MAC address entry in the subsystem.

The method according to claim 2, wherein before the global system receives the aging message or the keep-alive message of the MAC address entry from the subsystem, the method further includes:

The subsystem sends, to the global system, a MAC address entry of an aging state change in the subsystem MAC address table, when the aging state of the MAC address entry in the subsystem MAC address table is changed. Aging message or keep-alive message.

The method according to claim 3, wherein the subsystem sends, to the global system, an aging message or a keep-alive message of an aging state changed MAC address entry in the subsystem MAC address table, Also includes:

If the aging status of the MAC address entry in the MAC address table of the subsystem is inconsistent before and after the update, the subsystem determines that the aging status of the MAC address entry has been changed.

The method according to claim 4, wherein before the subsystem determines that the aging status of the MAC address entry has been changed, the method further includes:

When the subsystem receives the keep-alive message of the MAC address entry in the subsystem MAC address table, the subsystem updates the aging status of the MAC address entry to keep-alive;

The subsystem updates the aging status of the MAC address entry to aging when the aging time of the MAC address entry in the subsystem MAC address table arrives. An aging processing system for a MAC address includes a global system and a plurality of subsystems, where the global system includes:

The obtaining module is configured to obtain a MAC address entry in sequence from the global system MAC address table;

a judging module, configured to determine an aging state of the MAC address entry in all subsystems;

An aging module, configured to notify all subsystems to age the MAC address entry when the determining module determines that all the aging states of the MAC address entries in all subsystems are aging;

The keep-alive module is configured to keep the MAC address entries in all subsystems in a case where the judging module determines that the aging states of the MAC address entries in all subsystems are not all aging. The system of claim 6, wherein the global system further comprises:

a receiving module, configured to receive an aging message or keep-alive message from the MAC address entry of the subsystem;

The recording module is configured to obtain and record an aging state of the MAC address entry in the subsystem according to the aging message or keep-alive message of the MAC address entry received by the receiving module. The system of claim 7, wherein each of the plurality of subsystems comprises:

a sending module, configured to send, in the case that the aging state of the MAC address entry in the subsystem MAC address table is changed, to the global system, the MAC address entry of the aging state change in the subsystem MAC address table Aging message or keep-alive message. The system of claim 8, wherein each of the plurality of subsystems further comprises:

The determining module determines that the aging state of the MAC address entry in the subsystem MAC address table is inconsistent before and after the update, and determines that the aging state of the MAC address entry has changed.

0. The system of claim 9, wherein each of the plurality of subsystems further comprises:

An update module, configured to: when receiving the keep-alive message of the MAC address entry in the subsystem MAC address table, update the aging status of the MAC address entry to keep-alive; and in the subsystem MAC When the aging time of the MAC address entry in the address table is reached, the aging status of the MAC address entry is updated to aging.