CN102014062B - The control method of MAC Address drift and device - Google Patents
The control method of MAC Address drift and device Download PDFInfo
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Abstract
The invention discloses control method and the device of the drift of a kind of MAC Address, wherein, the method comprises: in mac address table, search the MAC Address entry of mating with the data message received; If find, then judge that whether the port numbers of above-mentioned MAC Address entry is consistent with the port numbers that above-mentioned data message flows into; If inconsistent, then the priority of the port that the priority of the port above-mentioned MAC Address entry pointed to and above-mentioned data message flow into compares; If the priority of the port that the priority of the port that above-mentioned MAC Address entry is pointed to flows into higher than above-mentioned data message, then arrange and do not allow above-mentioned MAC Address entry to drift about.The invention solves the network congestion problem caused because of MAC Address drift in prior art, ensure that network transmission quality.
Description
Technical field
The present invention relates to two layers of retransmission technique field of communication apparatus in the communications field, specifically, particularly relate to control method and the device of a kind of MAC (Media Access Control, medium education) address drift.
Background technology
The features such as Ethernet is simple with it, convenient, efficient, become the technology that current local area network networking and broadband access network are commonly used the most, have in fact become the universal standard of local area network (LAN), IP metropolitan area network and broadband access network.But due to its broadcast characteristic, thus also create the very weak one side of Ethernet, that is exactly the harmfulness of Ethernet Circle.Ethernet Circle refers to because the reasons such as network connectivity is lack of standardization, short cause the data forwarding paths of whole network to there is loop, the harm caused thus mainly comprises broadcast storm, MAC Address drift, transmits entanglement etc., thus causes whole network congestion, interruption.
Summary of the invention
The control method that main purpose of the present invention is to provide a kind of MAC Address to drift about and device, at least to solve the network congestion problem caused because MAC Address drift in prior art.
According to an aspect of the present invention, provide the control method of a kind of MAC Address drift, it comprises: in mac address table, search the MAC Address entry of mating with the data message received; If find, then judge that whether the port numbers of above-mentioned MAC Address entry is consistent with the port numbers that above-mentioned data message flows into; If inconsistent, then the priority of the port that the priority of the port above-mentioned MAC Address entry pointed to and above-mentioned data message flow into compares; If the priority of the port that the priority of the port that above-mentioned MAC Address entry is pointed to flows into higher than above-mentioned data message, then arrange and do not allow above-mentioned MAC Address entry to drift about.
Further, if the priority of the port of above-mentioned MAC Address entry sensing equals the priority of the port that above-mentioned data message flows into, also comprise: detect above-mentioned MAC Address entry and whether drift about; If occur, then judge whether the number of times that above-mentioned MAC Address entry is drifted about is greater than predetermined drift frequency threshold value; If be greater than, then arrange and do not allow above-mentioned MAC Address entry to drift about.
Further, if the priority of the port of above-mentioned MAC Address entry sensing equals the priority of the port that above-mentioned data message flows into, also comprise: in predetermined protection duration, arrange and do not allow above-mentioned MAC Address entry to drift about.
Further; if the priority of the port that above-mentioned MAC Address entry is pointed to equals the priority of the port that above-mentioned data message flows into; also comprise: detect that above-mentioned MAC Address entry is drifted about at every turn; then be extended for the protection duration that above-mentioned MAC Address entry is arranged; wherein; in protection duration after each above-mentioned MAC Address entry is drifted about, arrange and do not allow above-mentioned MAC Address entry to drift about.
Further, also comprise: in above-mentioned protection duration, the MAC Address do not learnt in the data message received is set, or, abandon the data message received.
Further, also comprise: outside above-mentioned protection duration, the MAC Address in the data message learning or do not learn to receive is set, or, abandon the data message received.
According to a further aspect in the invention, provide the control device of a kind of MAC Address drift, it comprises: search unit, for the MAC Address entry that the data message searched in mac address table with receive mates; Judging unit, for when finding, judges that whether the port numbers of above-mentioned MAC Address entry is consistent with the port numbers that above-mentioned data message flows into; Comparing unit, in the case of inconsistencies, judges that whether the port numbers of above-mentioned MAC Address entry is consistent with the port numbers that above-mentioned data message flows into; Processing unit, when the priority of the port that the priority for the port pointed in above-mentioned MAC Address entry flows into higher than above-mentioned data message, arranges and does not allow above-mentioned MAC Address entry to drift about.
Whether further, above-mentioned processing unit comprises: detection module, when the priority for the port pointed in above-mentioned MAC Address entry equals the priority of the port that above-mentioned data message flows into, detect above-mentioned MAC Address entry and drift about; Judge module, for when occurring, judges whether the number of times that above-mentioned MAC Address entry is drifted about is greater than predetermined drift frequency threshold value; First arranges module, for when being greater than, arranging and not allowing above-mentioned MAC Address entry to drift about.
Further; above-mentioned processing unit comprises: second arranges module; when priority for the port pointed in above-mentioned MAC Address entry equals the priority of the port that above-mentioned data message flows into, in predetermined protection duration, arrange and do not allow above-mentioned MAC Address entry to drift about.
Further; above-mentioned processing unit comprises: the 3rd arranges module; for when detecting that drift occurs above-mentioned MAC Address entry at every turn; be extended for the protection duration that above-mentioned MAC Address entry is arranged; wherein; in protection duration after each above-mentioned MAC Address entry is drifted about, arrange and do not allow above-mentioned MAC Address entry to drift about.
In the present invention, by forbidding that MAC Address is drifted about, solving the network congestion problem caused because of MAC Address drift in prior art, ensure that network transmission quality.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the preferred flow chart of one of the control method of drifting about according to the MAC Address of the embodiment of the present invention;
Fig. 2 is the preferred flow chart of another kind of the control method of drifting about according to the MAC Address of the embodiment of the present invention;
Fig. 3 is the preferred schematic diagram of one that the switch FDB (Forward Database, forwarding data) according to the embodiment of the present invention shows;
Fig. 4 is the preferred schematic diagram of another kind shown according to the switch FDB of the embodiment of the present invention;
Fig. 5 is according to the switching flow figure under the guard mode of the embodiment of the present invention;
Fig. 6 is the flow chart of the message study forwarding process according to the embodiment of the present invention;
Fig. 7 is the preferred structure chart of one of the control device drifted about according to the MAC Address of the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Fig. 1 is the preferred flow chart of one of the control method of drifting about according to the MAC Address of the embodiment of the present invention, and it comprises:
S102, searches the MAC Address entry of mating with the data message received in mac address table;
S104, if find, then judges that whether the port numbers of described MAC Address entry is consistent with the port numbers that described data message flows into;
S106, if inconsistent, then the priority of the port that the priority of the port described MAC Address entry pointed to and described data message flow into compares;
S108, if the priority of port that the priority of port that described MAC Address entry is pointed to flows into higher than described data message, then arranges and does not allow described MAC Address entry to drift about.
In this preferred embodiment, by forbidding that MAC Address is drifted about, solving the network congestion problem caused because of MAC Address drift in prior art, ensure that network transmission quality.
Preferably, if the priority of the port of described MAC Address entry sensing equals the priority of the port that described data message flows into, also comprise according to the control method that the MAC Address of the embodiment of the present invention is drifted about: detect described MAC Address entry and whether drift about; If occur, then judge whether the number of times that described MAC Address entry is drifted about is greater than predetermined drift frequency threshold value; If be greater than, then arrange and do not allow described MAC Address entry to drift about.In this preferred embodiment, by arranging drift frequency threshold value, control the drift of MAC Address entry further.
Preferably; if the priority of the port that described MAC Address entry is pointed to equals the priority of the port that described data message flows into; also comprise according to the control method that the MAC Address of the embodiment of the present invention is drifted about: in predetermined protection duration, arrange and do not allow described MAC Address entry to drift about.In this preferred embodiment, by arranging protection duration, control the drift of MAC Address entry further.
Preferably; if the priority of the port that described MAC Address entry is pointed to equals the priority of the port that described data message flows into; also comprise according to the control method that the MAC Address of the embodiment of the present invention is drifted about: detect that described MAC Address entry is drifted about at every turn; then be extended for the protection duration that described MAC Address entry is arranged; wherein; in protection duration after each described MAC Address entry is drifted about, arrange and do not allow described MAC Address entry to drift about.In this preferred embodiment, by adjustment protection duration, control the drift of MAC Address entry further.
Preferably, in described protection duration, the MAC Address do not learnt in the data message received is set, or, abandon the data message received.
Preferably, outside described protection duration, the MAC Address in the data message learning or do not learn to receive is set, or, abandon the data message received.
Preferably, if the priority of port that the priority of port that described MAC Address entry is pointed to flows into lower than described data message, then can to drift about normally forwarding according to general strategy.
Embodiment 2
In this preferred embodiment; the control method that a kind of MAC Address is drifted about is provided; available protecting can be carried out to the Ethernet labile state caused due to the drift of MAC Address frequently; also can carry out protectiveness to Ethernet Circle automatically cut off and eliminate, the final Ethernet Circle that reduces is on the impact of whole network simultaneously.
Current mac learning and forwarding strategy are: the port numbers of dynamic MAC address entry can freely be drifted about.This preferred embodiment introduces level system and punishment strategy in this study and forwarding strategy basis.That is: first grade classification is carried out to port, forbid that the MAC Address entry of high priority port is to the drift of low priority port; Simultaneously; when port priority is identical; the elongated Preservation tactics of time punitive is carried out to port MAC entry frequently of drifting about, within a period of time, forbids that this MAC entry carries out port drift, and forwarding with this MAC entries match data traffic of forbidding entering from other ports.
(1) in switch ports themselves table, a PORT_LEARNING_CLASS field is increased, for port selects a specific priority (0 ~ 7).As shown in Figure 2: when MAC entry prepares drift occurs, first judge that the priority of two ports is arranged, forbid that the MAC entry of high priority port is to the drift of low priority port.
(2) when two-port priority is identical, as shown in Figure 3 and Table 1: show in each list item, to increase a port shift counter STATION_MOVE_CNT, a punishment number of times PENALTY_CNT field and a protection duration PROTECT field at switch FDB.
Table 1
(3) as shown in Fig. 4 and following table: increase a overall situation configurable drift number of times tolerance threshold values TOLERANC_THRESHOLD--and drift about at most number of times/second; And Penalty time step-length PENALTY_PERIOD.
Table 2
In the present embodiment, as shown in Figure 5, it comprises the steps: the switching flow under MAC table STATION_MOVE guard mode
S502, arranges and starts timer;
S504, circulation starts;
S506, judges that whether the count value of timer is the integral multiple in punishment cycle, if so, goes to S508, otherwise, go to S512;
S508, judges whether the punishment cycle is not equal to 0, if be not equal to 0, then goes to S510; If equal 0, then go to S512;
S510, reduces the half punishment cycle, goes to S512;
S512, judges whether the punishment cycle is not equal to 0, if be not equal to 0, then goes to S514; If equal 0, then go to S522;
S514, judges whether migration number of times is greater than thresholding, if be greater than, then goes to S516; Otherwise, go to S518;
S516, the punishment cycle doubles, and goes to S522;
S518, judges whether the punishment cycle is greater than 1, if be greater than, then goes to S520; Otherwise, go to S522;
S520, reduces the half punishment cycle, goes to S522;
S522, traversal FDB list item, if traversal does not complete, then goes to S504, carries out the circulation of next round, otherwise, go to S524.
Can be found out by above-mentioned steps, the protection duration of protected entry subtracts by timer every Penalty time cycle PENALTY_PERIOD certainly, until entry removes guard mode (PROTECT=0).
Timer is per second removes the drift counting reading each entry, if find that count value is greater than the tolerance threshold values of configuration, then this entry guard time PROTECT is set to PENALTY_CNT+1, will punish that number of times PENALTY_CNT is from increasing simultaneously.
If find that entry is in nonprotected state, and STATION_MOVE_CNT count value is less than the tolerance threshold values of configuration, then certainly subtracted by punishment number of times PENALTY_CNT, until punishment number of times is reduced to default number of times (default=1).
In the present embodiment, message study forwarding process is as shown in Figure 6:
When data message enters MAC module, extract its source MAC+VLAN as KEY value, search in MAC table, if do not find coupling entry, select study by configuration, do not learn or abandon; If find relevant entry, compare this entry port numbers whether consistent with the port numbers that message flows into.If port is consistent, then the original entry of HIT; If port is inconsistent, then first compare the priority that message sink mouth and MAC show discal patch eye end mouth, if the priority height of port pointed by entry in MAC table, do not allow drift, dropping packets; If the priority of message sink mouth is high, then selects study according to port arrangement, do not learn or abandon; If the priority of message sink mouth equals entry in MAC table point to the priority of port, then judge the PROTECT field of MAC entry.If PROTECT field is 0, STATION_MOVE_CNT, counting increases certainly, and the configuration according to Learn Flag is selected study, do not learnt or abandon; If PROTECT field is not 0, select do not learn or abandon according to configuration.
In addition: the PROTECT attribute of MAC entry does not affect its dynamic attribute, will normal aging by HIT in MAC entry one times to twice ageing time.
Embodiment 3
Fig. 7 is the preferred structure chart of one of the control device drifted about according to the MAC Address of the embodiment of the present invention, and it comprises: search unit 702, for the MAC Address entry that the data message searched in mac address table with receive mates; Judging unit 704, for when finding, judges that whether the port numbers of described MAC Address entry is consistent with the port numbers that described data message flows into; Comparing unit 706, in the case of inconsistencies, judges that whether the port numbers of described MAC Address entry is consistent with the port numbers that described data message flows into; Processing unit 708, when the priority of the port that the priority for the port pointed in described MAC Address entry flows into higher than described data message, arranges and does not allow described MAC Address entry to drift about.
In this preferred embodiment, by forbidding that MAC Address is drifted about, solving the network congestion problem caused because of MAC Address drift in prior art, ensure that network transmission quality.
Whether preferably, described processing unit 708 comprises: detection module, when the priority for the port pointed in described MAC Address entry equals the priority of the port that described data message flows into, detect described MAC Address entry and drift about; Judge module, for when occurring, judges whether the number of times that described MAC Address entry is drifted about is greater than predetermined drift frequency threshold value; First arranges module, for when being greater than, arranging and not allowing described MAC Address entry to drift about.In this preferred embodiment, by arranging drift frequency threshold value, control the drift of MAC Address entry further.
Preferably; described processing unit 708 comprises: second arranges module; when priority for the port pointed in described MAC Address entry equals the priority of the port that described data message flows into, in predetermined protection duration, arrange and do not allow described MAC Address entry to drift about.In this preferred embodiment, by arranging protection duration, control the drift of MAC Address entry further.
Preferably; described processing unit 708 comprises: the 3rd arranges module; for when detecting that drift occurs described MAC Address entry at every turn; be extended for the protection duration that described MAC Address entry is arranged; wherein; in protection duration after each described MAC Address entry is drifted about, arrange and do not allow described MAC Address entry to drift about.In this preferred embodiment, by adjustment protection duration, control the drift of MAC Address entry further.
Preferably, in described protection duration, processing unit 708 arranges the MAC Address in the data message not learning to receive, or, abandon the data message received.
Preferably, outside described protection duration, processing unit 708 arranges the MAC Address in the data message learning or do not learn to receive, or, abandon the data message received.
Preferably, if the priority of port that the priority of port that described MAC Address entry is pointed to flows into lower than described data message, then processing unit 708 can to drift about forwarding normally according to general strategy.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a control method for MAC Address drift, is characterized in that, comprising:
The MAC Address entry of mating with the data message received is searched in mac address table;
If find, then judge that whether the port numbers of described MAC Address entry is consistent with the port numbers that described data message flows into;
If inconsistent, then the priority of the port that the priority of the port described MAC Address entry pointed to and described data message flow into compares;
If the priority of the port that the priority of the port that described MAC Address entry is pointed to flows into higher than described data message, then arrange and do not allow described MAC Address entry to drift about;
If the priority of the port that described MAC Address entry is pointed to equals the priority of the port that described data message flows into, also comprise:
Detect that described MAC Address entry is drifted about at every turn, be then extended for the protection duration that described MAC Address entry is arranged, wherein, in the protection duration after each described MAC Address entry is drifted about, arrange and do not allow described MAC Address entry to drift about.
2. method according to claim 1, is characterized in that, if the priority of the port of described MAC Address entry sensing equals the priority of the port that described data message flows into, also comprises:
Detect described MAC Address entry whether to drift about;
If occur, then judge whether the number of times that described MAC Address entry is drifted about is greater than predetermined drift frequency threshold value;
If be greater than, then arrange and do not allow described MAC Address entry to drift about.
3. method according to claim 1, is characterized in that, if the priority of the port of described MAC Address entry sensing equals the priority of the port that described data message flows into, also comprises:
In predetermined protection duration, arrange and do not allow described MAC Address entry to drift about.
4. the method according to claim 1 or 3, is characterized in that, also comprises:
In described protection duration, the MAC Address do not learnt in the data message received is set, or, abandon the data message received.
5. the method according to claim 1 or 3, is characterized in that, also comprises:
Outside described protection duration, the MAC Address in the data message learning or do not learn to receive is set, or, abandon the data message received.
6. a control device for MAC Address drift, is characterized in that, comprising:
Search unit, for the MAC Address entry that the data message searched in mac address table with receive mates;
Judging unit, for when finding, judges that whether the port numbers of described MAC Address entry is consistent with the port numbers that described data message flows into;
Comparing unit, in the case of inconsistencies, the priority of the port that the priority of the port described MAC Address entry pointed to and described data message flow into compares;
Processing unit, when the priority of the port that the priority for the port pointed in described MAC Address entry flows into higher than described data message, arranges and does not allow described MAC Address entry to drift about;
Described processing unit comprises:
3rd arranges module; if the priority of the port that described MAC Address entry is pointed to equals the priority of the port that described data message flows into; for when detecting that drift occurs described MAC Address entry at every turn; be extended for the protection duration that described MAC Address entry is arranged; wherein; in protection duration after each described MAC Address entry is drifted about, arrange and do not allow described MAC Address entry to drift about.
7. device according to claim 6, is characterized in that, described processing unit comprises:
Whether detection module, when the priority for the port pointed in described MAC Address entry equals the priority of the port that described data message flows into, detect described MAC Address entry and drift about;
Judge module, for when occurring, judges whether the number of times that described MAC Address entry is drifted about is greater than predetermined drift frequency threshold value;
First arranges module, for when being greater than, arranging and not allowing described MAC Address entry to drift about.
8. device according to claim 6, is characterized in that, described processing unit comprises:
Second arranges module, when the priority for the port pointed in described MAC Address entry equals the priority of the port that described data message flows into, in predetermined protection duration, arranges and does not allow described MAC Address entry to drift about.
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| CN102843440B (en) * | 2011-06-24 | 2017-04-26 | 中兴通讯股份有限公司 | Method of preventing media access control address drifting and network processing device |
| WO2012109883A1 (en) * | 2011-08-09 | 2012-08-23 | 华为技术有限公司 | Port blocking method and routing device |
| WO2013053122A1 (en) * | 2011-10-13 | 2013-04-18 | 中兴通讯股份有限公司 | Method and device for preventing loop in virtual private network |
| CN104980526A (en) * | 2014-04-04 | 2015-10-14 | 中兴通讯股份有限公司 | Control method of media access control (MAC) address drift, control device of MAC address drift and network device |
| CN105472055B (en) * | 2014-09-11 | 2018-12-28 | 中兴通讯股份有限公司 | port processing method and device |
| WO2016070316A1 (en) * | 2014-11-04 | 2016-05-12 | 华为技术有限公司 | Method, apparatus and system for controlling mac address flapping |
| CN107171952B (en) * | 2017-04-06 | 2019-10-11 | 烽火通信科技股份有限公司 | A kind of method and apparatus for realizing anti-ring in VPLS |
| CN109714182B (en) * | 2017-10-25 | 2022-01-25 | 中兴通讯股份有限公司 | Network control method, device and computer readable storage medium |
| CN113448961B (en) * | 2020-03-27 | 2022-08-02 | 烽火通信科技股份有限公司 | Data access method and system for multi-MAC (media Access control) address drift alarm table |
| CN115733643A (en) * | 2021-08-30 | 2023-03-03 | 中兴通讯股份有限公司 | MAC learning method, device, electronic equipment and storage medium |
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