CN1885810A - Equipment topology structure forming method in stack system - Google Patents
Equipment topology structure forming method in stack system Download PDFInfo
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- CN1885810A CN1885810A CNA2006100875155A CN200610087515A CN1885810A CN 1885810 A CN1885810 A CN 1885810A CN A2006100875155 A CNA2006100875155 A CN A2006100875155A CN 200610087515 A CN200610087515 A CN 200610087515A CN 1885810 A CN1885810 A CN 1885810A
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Abstract
The disclosed forming method for topological structure of stack system comprises: arranging two or more exchange units for the system, sending topological message with label item from one unit to another to determine the unique feature of exchange unit, selecting a main unit to send message to other units, beginning topological convergence. This invention improves stack system reliability.
Description
Technical field
The present invention relates to network technology, particularly a kind of stacked system equipment topological structure formation method.
Background technology
Along with popularizing and the growth of company information application demand of broadband application, the bulk velocity of network improves constantly, and the needs of big throughput data exchange and various intelligent use are increase day by day also.In order to make switch satisfy the quantitative requirement of catenet, generally in relatively large network, all adopt the mode that equipment is piled up to solve to port.The user can be with many switch unit equipments (UNIT, every UNIT have " UP " and " DOWN " stack port simultaneously), couple together the combination plant (Fabric) of forming an annular or chain by stack port.
In pile system, each UNIT needs a unique sign, its source is MAC (the Media Access Control of switch, medium access control) address, each equipment all have the local mac address table that comprises itself and comprise pile up in the address table of other crosspoint MAC, be stored in a reserved storage area among the FLASH.After piling up cable and connect between the UNIT, because the requirement of topology discovery algorithm, each UNIT can send the Ad (Advertisement that carries MAC Address to other UNIT, Topology Discovery) message, around each UNIT just learns to each other which UNIT is arranged, set up neighbours (neighbor) relation each other.Next, select a UNIT as MASTER UNIT by information more each other, other UNIT is then as SLAVE UNIT.At this moment, the Topology Discovery process begins convergence, and MASTER can distribute a UNIT ID for each UNIT, in order to distinguish each other.Then, MASTER begins wherein to comprise the relevant information of all UNIT in the Fabric to all SLAVE UNIT issue HB (Heart Beat, heartbeat) messages, as UNIT ID or the like, has obtained the position relation between other UNIT and this UNIT simultaneously.
But the MAC Address of UNIT may be modified owing to unusual reason, and for example information is rewritten unusually among the FLASH, or has revised the MAC Address of switch because of artificial misoperation, and the MAC Address that two or two above UNIT occur identical situation just.Like this, because the Ad message that sends of the identical UNIT of MAC Address is identical, it is which platform UNIT sends that the UNIT that causes receiving message can't distinguish the Ad message.
Fig. 1 is the pile system schematic diagram, and the pile system among Fig. 1 is the pile system that annular connects, if will disconnect between UNIT5 and the UNIT6 then become the chain pile system.As shown in Figure 1, suppose that the MAC Address of UNIT 1 and UNIT 4 is the same just, and be minimum among all UNIT, and suppose that the UNIT of MAC Address minimum is MASTER UNIT, the both can become MASTER like this.In the topological convergence algorithm, what receive from the DOWN port in supposition is under the situation of Ad (Adverti sement, the Topology Discovery) message that sends of this UNIT, thinks that pile system is an annular, and enter the convergence process state, can cause following two kinds of improper results like this:
1), will therefore enter the processing mode of annular so if original system is a chain.Suppose to disconnect between UNIT5 and the UNIT6, UNIT4 can not receive the Ad message that oneself sends.But because the MAC Address of UNIT 1 and UNIT 4 is the same just, the Ad message that makes UNIT1 send is the same with the Ad message that UNIT 4 sends, and can make UNIT4 think by mistake and receive the Ad message that oneself sends, and then thinks that topology is annular;
2) if original system is an annular, UNIT 1 and UNIT 4 can enter the topological convergence processing in advance because receiving the Ad message that the other side sends earlier so, for example UNIT 1 sends the message that is labeled as among Fig. 1 1., UNIT4 sends the message that is labeled as 2., before UNIT 1 receives that the message that oneself sends 1., owing to receive the message of UNIT 4 earlier, and MAC Address and priority and this locality is consistent, so think it is the Ad message that oneself sends by mistake.
Summary of the invention
The invention provides the topological structure formation method of equipment in a kind of pile system, can identify the Ad message that crosspoint sends uniquely, thereby reach the purpose of distinguishing different UNIT.
The invention provides a kind of stack system topological structure formation method, described pile system comprises two above crosspoints, between the crosspoint by after piling up cable and connecting, described method comprises:
Each crosspoint sends the Topology Discovery message with identification item to other crosspoint;
Described crosspoint utilizes described identification item to determine the uniqueness of described crosspoint;
Elect main crosspoint and begin topological convergence.
Described system has local clock able to programme, and the identification item in the described Topology Discovery message utilizes the local clock value to generate as input parameter.
When crosspoint has been received the Topology Discovery message identical with himself MAC Address, and the crosspoint with described MAC Address meets the condition that becomes main crosspoint, then
Whether the identification item that comprises in the Topology Discovery message of relatively receiving is identical;
If identical, illustrate that the Topology Discovery message of receiving is the Topology Discovery message that this crosspoint sends;
If different, then described crosspoint abandons described Topology Discovery message, and delay a period of time is sent follow-up Topology Discovery message again.
The method of the main crosspoint of described election is: the crosspoint that process sends follow-up Topology Discovery message time of delay at first is main crosspoint.
Do not meet the condition that becomes main crosspoint if having the crosspoint of described MAC Address, when then topological convergence process closed to an end, main crosspoint was checked all crosspoints, if find to exist the identical crosspoint of MAC Address, then keep one of them, isolate all the other crosspoints.
The message that described crosspoint was not sent other crosspoint in described time of delay responds.
Described stacking method also comprises: main crosspoint last once restrain successfully after, the identification item information of all crosspoints in the record pile system is used for comparing in topological convergence process next time.
When described main crosspoint is received the Topology Discovery message that other crosspoint sends, if the MAC Address in the described Topology Discovery message is identical with the MAC Address of certain crosspoint in the pile system, whether the identification item value of carrying in the then more described Topology Discovery message is identical, if identification item value difference then abandon described message and isolate to send the crosspoint of described message; If the identification item value is identical this message is carried out normal process.
The topological structure formation method of equipment in the another kind of pile system provided by the invention, described pile system comprises two above crosspoints, between the crosspoint each other by after piling up cable and connecting, described method comprises:
Each crosspoint sends the Topology Discovery message with identification item to other crosspoint;
Described crosspoint utilizes described identification item to determine the uniqueness of described crosspoint, and elects main crosspoint and begin topological convergence according to described identification item.
In topology discovery algorithm, utilize and determine main crosspoint by the value that compares identification item.
Compared with prior art, the present invention has the following advantages:
Method of the present invention lost efficacy and can't distinguish under each other the situation at the mac address information of pile system internal cause part UNIT, utilize the specific identifier item to identify the Ad message that crosspoint sends uniquely, though MAC Address may clash, but the Ad message that sends from the identical UNIT of MAC Address is different, thereby reaches the purpose of distinguishing different UNIT.MASTER UNIT utilizes the uniqueness sign of UNIT in the pile system can distinguish every UNIT effectively, thereby the stability of the topological structure forming process of stacked system equipment is improved, solve the abnormal problem that can run in the running of pile system, improved pile system service quality.
Description of drawings
Fig. 1 is the pile system schematic diagram;
Fig. 2 is the topological structure formation method flow diagram according to the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.UNIT in the diagram is a switch unit equipment, switch for example, but be not limited to switch.
Fig. 2 is the topological structure formation method flow diagram according to the embodiment of the invention.As shown in Figure 2, between the UNIT each other by after piling up cable and connecting, each UNIT sends the Ad message (S101) with identification item key to other UNIT; Each UNIT utilizes described identification item key to determine the uniqueness of UNIT (S102); By information more each other, determine main crosspoint and from crosspoint and begin topological convergence (S103); Then, main crosspoint sends heartbeat message to other crosspoint and forms topological structure.
Stacked system equipment topological structure formation method of the present invention increases an identification item key in the Ad message in the topological convergence process, be used for identifying uniquely the message that UNIT sends.In one embodiment of the invention, as input parameter, calculate and to relate to programmable clock by obtain and the key value of clock value with system's local clock value for each UNIT, and its interruption frequency can be by program control.For example adopt the clock of 1MHz crystal oscillator, its inner counter triggers once every 1 microsecond, register for 16, interruption frequency can utilize program control, from 1 microsecond once to 65.536ms, and now a lot of systems all adopt clock faster, its cycle of operation is hundreds of nanosecond, it is very short that system clock cycle was compared with the cycle of stack system topological convergence with the start-up time of each UNIT, thereby run to will obtain clock value the time when pile system, the clock value that each UNIT obtains can not be in full accord.Therefore, system's local clock value identifies the Ad message that UNIT sends uniquely as identification item key, thereby identifies each UNIT uniquely.
The stacked system equipment of describing forms in the process of topological structure in the present embodiment, when the MAC Address of UNIT is modified, for example the MAC Address of UNIT is rewritten or revised because of artificial misoperation to information unusually among the FLASH, and the lucky identical situation of the MAC Address that two or two above UNIT occur, promptly a UNIT has received the Ad message identical with own MAC Address, but owing to adopted method of the present invention, utilize system's local clock value to identify the Ad message that UNIT sends uniquely as identification item key, so the identification item key of the Ad message that MAC Address is identical is different, the UNIT of MAC Address system also can be discerned uniquely.
In follow-up topological convergence process, suppose that the MAC Address of two UNIT is identical just, so identical MAC Address may be minimum in the system, also may not be.Suppose that making the UNIT of MAC Address minimum is MASTER UNIT, referring to Fig. 1, the MAC Address of supposing two UNIT (UNIT1 and UNIT4) is identical and minimum, when UNIT1 receives the Ad message identical with own MAC Address, need then further to check whether identical with the identification item key that oneself preserves the identification item key that comprises in its Ad message of receiving is.If identical, illustrate that what receive is the Ad message that oneself sends; If different, with regard to the MAC Address that also has a UNIT (UNIT4) in the illustrative system at least and own identical, abandon this Ad message so at this moment, postpone a period of time simultaneously to send follow-up Ad message again, be greater than convergent cycle time of delay.Be in the dormancy phase before the Ad message sending next time, the message that other UNIT are sent does not respond processing.In like manner, UNIT4 also can be because of identical former thereby be in the dormancy state.
Because the asynchronism(-nization) that each UNIT postpones supposes that UNIT1 recovers earlier to send the Ad message, establishes the manor of oneself so UNIT1 will become MASTER, and other UNIT that still is in active state is classified as oneself management.When UNIT4 spends the dormancy phase and after recovering normal condition, after the Ad message that it sends is once more received by MASTER and other UNIT,, find identically with the MAC Address of MASTER through checking, just abandon this Ad message, so system isolates out UNIT4.
The MAC Address of supposing UNIT1 and UNIT4 is identical but be not minimum, when topological convergence process so closed to an end, MASTER UNIT reexamined all members one time, if there is the UNIT of identical MAC Address, then keep one of them, isolate out remaining UNIT.
Need to prove that said method is not only applicable to two UNIT the identical situation of MAC Address takes place, it is suitable equally for two above UNIT the identical situation of MAC Address to take place.
MASTER UNIT can last once restrain successfully after, the information of all UNIT in the record Fabric comprises its sign key separately, is used for comparing in topological convergence process next time.In this process, when the MASTER of pile system UNIT receives the Topology Discovery message that other UNIT sends, in case the MAC Address in the described Ad message is identical with certain UNIT reserved MAC address in the Fabric, the UNIT that receives this message just can check at once identification item key value entrained in this message whether with this Fabric in the UNIT pairing identification item key identical with this MAC Address identical, if the key value is different, then there are two UNIT that MAC Address is identical in the illustrative system, MASTER UNIT just abandons this message, the UNIT that sends this Topology Discovery message is also just isolated out, and needs only the Ad packet loss that this equipment is sent and disregards and it can be isolated out; If the key value is identical, illustrate that then described Ad message is the message that other UNIT sends in the system, carries out normal process to this message and gets final product.
In another embodiment of the present invention, the key value of obtaining by preceding method can directly replace MAC Address.That is to say, utilize MAC Address to judge in the topology discovery algorithm and the process handled can replace with identification item Key, when for example electing MASTER UNIT, can be with the UNIT of identification item Key value minimum as MASTER UNIT; When MASTER UNIT distributes UNIT ID, also with Key value and priority foundation as a comparison.Said as preamble, the MAC Address of switch may be modified owing to unusual reason and cause MAC Address identical, and the key value directly replaces the MAC Address of UNIT each UNIT to be distinguished and identifies the generation that just can avoid above-mentioned situation.
In ensuing topological structure forming process, MASTER begins to have obtained the position relation between other UNIT and this UNIT to all SLAVE UNIT issue HB messages, forms reliable topological structure.
Though described the present invention by execution mode, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1, a kind of stack system topological structure formation method, described pile system comprises two above crosspoints, between the crosspoint by after piling up cable and connecting, it is characterized in that: described method comprises:
Each crosspoint sends the Topology Discovery message with identification item to other crosspoint;
Described crosspoint utilizes described identification item to determine the uniqueness of described crosspoint;
Elect main crosspoint and begin topological convergence.
2, stacking method as claimed in claim 1 is characterized in that: described system has local clock able to programme, and the identification item in the described Topology Discovery message utilizes the local clock value to generate as input parameter.
3, stacking method as claimed in claim 1 is characterized in that: when crosspoint has been received the Topology Discovery message identical with himself MAC Address, and the crosspoint with described MAC Address meets the condition that becomes main crosspoint, then
Whether the identification item that comprises in the Topology Discovery message of relatively receiving is identical;
If identical, illustrate that the Topology Discovery message of receiving is the Topology Discovery message that this crosspoint sends;
If different, then described crosspoint abandons described Topology Discovery message, and delay a period of time is sent follow-up Topology Discovery message again.
4, stacking method as claimed in claim 3 is characterized in that: the method for the main crosspoint of described election is: the crosspoint that process sends follow-up Topology Discovery message time of delay at first is main crosspoint.
5, stacking method as claimed in claim 3, it is characterized in that: do not meet the condition that becomes main crosspoint if having the crosspoint of described MAC Address, when then topological convergence process closes to an end, main crosspoint is checked all crosspoints, if find to exist the identical crosspoint of MAC Address, then keep one of them, isolate all the other crosspoints.
6, stacking method as claimed in claim 4 is characterized in that: the message that described crosspoint was not sent other crosspoint in described time of delay responds.
7, stacking method as claimed in claim 1 is characterized in that, also comprises: main crosspoint last once restrain successfully after, the identification item information of all crosspoints in the record pile system is used for comparing in topological convergence process next time.
8, stacking method as claimed in claim 7, it is characterized in that: when described main crosspoint is received the Topology Discovery message that other crosspoint sends, if the MAC Address in the described Topology Discovery message is identical with the MAC Address of certain crosspoint in the pile system, whether the identification item value of carrying in the then more described Topology Discovery message is identical, if identification item value difference then abandon described message and isolate to send the crosspoint of described message; If the identification item value is identical this message is carried out normal process.
9, the topological structure formation method of equipment in a kind of pile system, described pile system comprises two above crosspoints, between the crosspoint each other by after piling up cable and connecting, described method comprises:
Each crosspoint sends the Topology Discovery message with identification item to other crosspoint;
Described crosspoint utilizes described identification item to determine the uniqueness of described crosspoint, and elects main crosspoint and begin topological convergence according to described identification item.
10, stacking method as claimed in claim 9 is characterized in that: utilize by the value that compares identification item in topology discovery algorithm and determine main crosspoint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100875155A CN100435524C (en) | 2006-06-13 | 2006-06-13 | Equipment topology structure forming method in stack system |
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| CNB2006100875155A CN100435524C (en) | 2006-06-13 | 2006-06-13 | Equipment topology structure forming method in stack system |
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| CN100435524C CN100435524C (en) | 2008-11-19 |
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| WO2009062352A1 (en) * | 2007-11-13 | 2009-05-22 | Zte Corporation | A stack method of routing switch devices |
| WO2009062351A1 (en) * | 2007-11-12 | 2009-05-22 | Zte Corporation | Method for stacking system merging |
| CN101123510B (en) * | 2007-07-11 | 2011-03-02 | 中兴通讯股份有限公司 | Method, switch and switching chip for port separation of switch |
| CN101621466B (en) * | 2009-08-13 | 2012-09-26 | 中兴通讯股份有限公司 | Method for establishing topological structure by switching device, switching device and stack system |
| CN104038448A (en) * | 2014-06-09 | 2014-09-10 | 福建星网锐捷网络有限公司 | Stacking-system-based convergence processing method and device and stacking system |
| US9673999B2 (en) | 2013-07-09 | 2017-06-06 | Hewlett Packard Enterprise Development Lp | Member device of stacked switches system |
| US10015054B2 (en) | 2013-06-07 | 2018-07-03 | Hewlett Packard Enterprise Development Lp | Packet forwarding |
| CN110460544A (en) * | 2018-05-08 | 2019-11-15 | 华为技术有限公司 | Mark distributing method, optical cable and the relevant device of interchanger in a kind of stacking |
| CN114448918A (en) * | 2021-12-27 | 2022-05-06 | 深圳市智微智能软件开发有限公司 | Switch stacking method and system |
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| CN103220234B (en) | 2013-04-19 | 2015-12-23 | 杭州华三通信技术有限公司 | The topology discovery method of matrix pile system and equipment |
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| US6785272B1 (en) * | 1999-06-24 | 2004-08-31 | Allied Telesyn, Inc. | Intelligent stacked switching system |
| US7319664B2 (en) * | 2002-01-10 | 2008-01-15 | Accton Technology Corporation | Redundant link management switch for use in a stack of switches and method thereof |
| CN1669269A (en) * | 2002-09-06 | 2005-09-14 | 因芬奈昂技术股份有限公司 | Stacking a plurality of data switches |
| CN100370740C (en) * | 2004-03-06 | 2008-02-20 | 鸿富锦精密工业（深圳）有限公司 | Management method of stacked switch |
| US7974272B2 (en) * | 2004-07-29 | 2011-07-05 | Conexant Systems, Inc. | Remote control of a switching node in a stack of switching nodes |
| CN100481814C (en) * | 2004-10-28 | 2009-04-22 | 阿尔卡特公司 | Switch equipment in stack managing system with automatic set up mechanism |
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| CN101123510B (en) * | 2007-07-11 | 2011-03-02 | 中兴通讯股份有限公司 | Method, switch and switching chip for port separation of switch |
| WO2009062351A1 (en) * | 2007-11-12 | 2009-05-22 | Zte Corporation | Method for stacking system merging |
| CN101163077B (en) * | 2007-11-12 | 2010-12-08 | 中兴通讯股份有限公司 | Combination method of stacked system |
| WO2009062352A1 (en) * | 2007-11-13 | 2009-05-22 | Zte Corporation | A stack method of routing switch devices |
| CN101170483B (en) * | 2007-11-13 | 2010-09-29 | 中兴通讯股份有限公司 | A method for stacking route switching device |
| CN101621466B (en) * | 2009-08-13 | 2012-09-26 | 中兴通讯股份有限公司 | Method for establishing topological structure by switching device, switching device and stack system |
| US10015054B2 (en) | 2013-06-07 | 2018-07-03 | Hewlett Packard Enterprise Development Lp | Packet forwarding |
| US9673999B2 (en) | 2013-07-09 | 2017-06-06 | Hewlett Packard Enterprise Development Lp | Member device of stacked switches system |
| CN104038448B (en) * | 2014-06-09 | 2017-09-26 | 福建星网锐捷网络有限公司 | Convergence process method and apparatus and pile system based on pile system |
| CN104038448A (en) * | 2014-06-09 | 2014-09-10 | 福建星网锐捷网络有限公司 | Stacking-system-based convergence processing method and device and stacking system |
| CN110460544A (en) * | 2018-05-08 | 2019-11-15 | 华为技术有限公司 | Mark distributing method, optical cable and the relevant device of interchanger in a kind of stacking |
| CN110460544B (en) * | 2018-05-08 | 2021-09-07 | 华为技术有限公司 | Identification distribution method of switches in stack, optical cable and related equipment |
| US11770333B2 (en) | 2018-05-08 | 2023-09-26 | Huawei Technologies Co., Ltd. | Method for assigning identifiers to switches in stack, optical cable, and related device |
| CN114448918A (en) * | 2021-12-27 | 2022-05-06 | 深圳市智微智能软件开发有限公司 | Switch stacking method and system |
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: NEW H3C TECHNOLOGIES Co.,Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: HANGZHOU H3C TECHNOLOGIES Co.,Ltd. |
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Granted publication date: 20081119 |