CN101567892B - Method and device for realizing MSTP multiprocess - Google Patents
Method and device for realizing MSTP multiprocess Download PDFInfo
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- CN101567892B CN101567892B CN2009101426373A CN200910142637A CN101567892B CN 101567892 B CN101567892 B CN 101567892B CN 2009101426373 A CN2009101426373 A CN 2009101426373A CN 200910142637 A CN200910142637 A CN 200910142637A CN 101567892 B CN101567892 B CN 101567892B
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Abstract
The invention provides a method and a device for realizing MSTP multiprocess. The method includes steps that STP protocol of a backbone region is operated in the backbone region consisting of a plurality of service provider edge devices, and the backbone region corresponds to main MST process; user edge devices are accessed to any two devices of the plurality of service provider edge devices to form a branch region, STP protocol of the branch region is operated in the branch region, and the branch region corresponds to auxiliary MST process; the backbone region calculates branch region which needs to eliminate loop in the branch region according to BPDU, and interdicts one link except a share link in the branch region which needs to eliminate loop. The invention divides a plurality of regions to independently operate different MSTP processes, each process operates different STP protocol, thereby eliminating different protocol types compatibility problem; topology change of single device only influences devices in same MSTP process; and the access of new user edge device does not influence original topology structure.
Description
Technical field
The present invention relates to Spanning-Tree Protocol, relate in particular to a kind of method and device of the MSTP of realization multi-process.
Background technology
In two layers of switching network, the existence of network loop causes message in loop, constantly to circulate and hyperplasia, produces broadcast storm, causes effective bandwidth to be broadcasted storm and occupies, and it is unavailable that network becomes.To top situation; Spanning-Tree Protocol (Spanning Tree Protocol STP) is arisen at the historic moment; STP is the blocking network redundant link optionally; Accomplish to generate tree and calculate according to the information that comprises in bridge protocol data unit (Bridge Protocol Data Unit BPDU), network is trimmed to tree-shaped, cancellation loop and backup link.RSTP (RapidSpanning Tree Protocol RSTP) that network topology restrains fast and the MSTP (Multi-Spanning Tree Protocol MSTP) that realizes data traffic load balancing between VLAN are appearring on the basis of STP realizing.
Fig. 1 generates the sketch map that tree protocol is abolished loop for prior art one.As shown in Figure 1; Digital subscriber line access multiplex 102 (DSLAM; Digital Subscriber Line Access Multiplexer) through switch 101 access of virtual private LAN services (Virtual Private LAN Service VPLS) network, the operation Spanning-Tree Protocol is destroyed loop between switch 101 and DSLAM 102.
Fig. 2 abolishes the sketch map of loop for prior art two Spanning-Tree Protocols.As shown in Figure 2; Provider Edge (Provider Edge PE) equipment 201,202,203,204,205,206 forms two layers of aggregation networks, and customer edge (Customer Edge CE) 207 and equipment 208 insert two layers of aggregation networks through PE equipment 204,205.Operation MSTP agreement in two layers of aggregation networks, operation STP or RSTP agreement between CE and the PE.
In realizing process of the present invention; The inventor finds to have following problem in the prior art at least: in prior art one; All DSLAM rings are participated in a MSTP process and are calculated; Interact easily between the DSLAM, the STP protocol type of each different DSLAM inscription of loop maybe be different, and single MSTP process is difficult to compatible all STP protocol types.
In prior art two, all PE, CE operate in the MSTP process, and the link change of CE or PE or node failure can trigger all devices response change in topology incident arbitrarily, and the double layer network management difficulty is big; When new CE adds network, need to adapt to the STP protocol type that has moved on the PE equipment, and new CE adding also can cause former network response change in topology incident; , protocol types such as Multiple Spanning Tree Protocol (Multi-Spanning Tree Protocol MSTP) and STP, RSTP can be adapted to the pattern of non-MSTP when docking automatically; Lose the advantage of MSTP itself; And each instance of MSTP transmits information in a BPDU, needs configuration MSTP territory.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of method and device of the MSTP of realization multi-process; Support to insert the network of multiple different STP protocol type; Eliminate different agreement type compatibility problem, make the individual equipment change in topology not influence the in-process equipment of other MSTP.
For realizing above-mentioned purpose, the present invention provides a kind of method of the MSTP of realization multi-process, and this method comprises: the STP agreement of the said backbone area of operation in the backbone area that a plurality of provider edge equipments are formed, the corresponding main MSTP process of said backbone area; Customer edge is inserted any two equipment in said a plurality of provider edge equipment, form stub area, the STP agreement of the said stub area of operation in said stub area, said stub area correspondence is from the MSTP process; Said backbone area moves different MSTP processes respectively with each stub area, the different STP agreement of each process operation; Said backbone area calculates the stub area of needs cancellation loop in the said stub area according to BPDU, and blocks a link except said shared link in the said stub area that needs cancellation loop.
For realizing above-mentioned purpose; The present invention also provides a kind of device of the MSTP of realization multi-process; This device comprises: host process agreement operation unit, and the backbone area that is used for forming at a plurality of provider edge equipments moves the STP agreement of said backbone area, the corresponding main MSTP process of said backbone area; The equipment access unit is used for customer edge is inserted any two equipment of said a plurality of provider edge equipments, forms stub area, the STP agreement of the said stub area of operation in said stub area, and said stub area correspondence is from the MSTP process; Said backbone area moves different MSTP processes respectively with each stub area, the different STP agreement of each process operation; Link is provided with the unit, is used for being set to choke free shared link through the link between said any two equipment of control STP parameter; Loop is eliminated the unit, is used for said backbone area and calculates the stub area of said stub area needs cancellation loop according to BPDU, and block a link except said shared link in the said stub area that needs cancellation loop.
The beneficial effect of the embodiment of the invention: divide the different MSTP process of a plurality of regional isolated operations, the different STP agreement of each process operation has been eliminated different agreement type compatibility problem; The individual equipment change in topology only influences the in-process equipment of same MSTP; New CE equipment inserts can not influence original topological structure.
Description of drawings
Fig. 1 generates the sketch map that tree protocol is abolished loop for prior art one;
Fig. 2 abolishes the sketch map of loop for prior art two Spanning-Tree Protocols;
Fig. 3 realizes the method flow diagram of MSTP multi-process for the embodiment of the invention;
Fig. 4 is an embodiment of the invention MSTP multiple progress structure sketch map;
Fig. 5 is provided with flow chart for embodiment of the invention STP parameter;
Fig. 6 realizes the apparatus structure sketch map of MSTP multi-process for the embodiment of the invention;
Fig. 7 realizes the apparatus structure sketch map of MSTP multi-process for another embodiment of the present invention;
Fig. 8 is provided with the structural representation of unit 603 for link in the device of embodiment of the invention realization MSTP multi-process.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Fig. 3 realizes the method flow diagram of MSTP multi-process for the embodiment of the invention.As shown in Figure 3, said method comprises:
Step S301: operation STP agreement in the backbone area that a plurality of provider edge equipments are formed, the corresponding main MSTP process of said backbone area;
Step S302: customer edge is inserted any two equipment in said a plurality of provider edge equipment and forms stub area, the said stub area STP agreement of operation in said stub area, said stub area correspondence is from the MSTP process;
Step S303: the link through between said any two equipment of control STP parameter is set to choke free shared link;
Step S304: said backbone area calculates the stub area of needs cancellation loop in the said stub area according to bridge protocol data unit B PDU, and blocks a link except said shared link in the said stub area that needs cancellation loop.
Fig. 4 is an embodiment of the invention MSTP multiple progress structure sketch map.As shown in Figure 4; PE equipment 401,402,403,404,405 and 406 forms two layers of aggregation networks, forms backbone area, the STP agreement of this backbone area operation self; The PE amount of equipment gets final product more than or equal to two; And being not limited only to above-mentioned six, the MSTP process that backbone area is corresponding is main MSTP process, is denoted as MSTP0 among the figure.CE equipment 407 and CE equipment 408 insert two layers of aggregation networks through PE equipment 404 and PE equipment 405 respectively; Form stub area I and stub area ∏ respectively; The corresponding MSTP1 process of stub area I; The corresponding MSTP2 process of stub area ∏, MSTP1 process and MSTP2 process are from the MSTP process, move the STP agreement of self among stub area I and the stub area ∏ respectively.
The STP agreement of backbone area operation self; Calculate the stub area of needs cancellation loop in the said stub area according to BPDU; Block a link except said shared link in the said stub area that needs cancellation loop then, prevent in whole network, to occur the loop phenomenon.
The beneficial effect of the embodiment of the invention: divide the different MSTP process of a plurality of regional isolated operations, the different STP agreement of each process operation has been eliminated different agreement type compatibility problem; The individual equipment change in topology only influences the in-process equipment of same MSTP.
As shown in Figure 4; CE equipment inserts two layers of aggregation networks through PE equipment 404 and PE equipment 405; Link between PE equipment 404 and the PE equipment 405 is called as shared link; CE equipment can add two layers of aggregation networks through any two equipment of two layers of aggregation networks, and the link between these any two equipment is called as shared link.
Shared link between PE equipment 404 and the PE equipment 405 can not get clogged; Shared link between PE equipment 404 and PE equipment 405 gets clogged; Though from the MSTP process, there is not loop, CE equipment can form a big loop through PE equipment as shown in Figure 4 405,406,401,402,403,404 in proper order.So need be set to clog-free shared link through the shared link that is provided with between STP parameter PE equipment 404 and the PE equipment 405, the STP parameter setting method is as shown in Figure 5:
Step S501: be made as the equipment 404 at shared link two ends and the priority of equipment 405 the highest and inferior high respectively; Specific practice is to make the root bridge location on equipment 404 or equipment 405;
Step S502: said shared link is set to 0 at said cost (Cost) from the MSTP process;
Step S503: judge whether the equipment 404 at shared link two ends and equipment 405 move the MSTP agreement, if carry out step S504, if not, carry out step S505;
Step S504: with the equipment disposition at shared link two ends in same Multiple Spanning Tree (MST) region;
Just there is not the notion of Multiple Spanning Tree (MST) region in the equipment 404 at shared link two ends and 405 if not operation MSTP agreement, need not carry out the Multiple Spanning Tree (MST) region configuration yet; If the equipment operation MSTP agreement at shared link two ends need be configured to the Multiple Spanning Tree (MST) region of the equipment at shared link two ends identically, and the equipment that makes the shared link two ends is in same Multiple Spanning Tree (MST) region.
Step S505:STP parameter is provided with end.
Whether equipment 404 that can be through inspection shared link two ends and the clean culture MAC between the equipment 405 can reach and confirm whether shared link gets clogged; Specific practice is: slave unit 404 sends clean culture MAC to equipment 405, clean culture MAC is sent, if clean culture MAC can arrive equipment 405 to equipment 405 through two layers of aggregation networks; Show that the link between equipment 404 and the equipment 405 is choke free; If clean culture MAC can not arrive equipment 405, show the link obstructions between equipment 404 and the equipment 405, this moment, equipment 407 and equipment 408 will form big loop with equipment 405, equipment 406, equipment 401, equipment 402, equipment 403 and equipment 404 respectively; Cause message continuous circulation hyperplasia in big loop; Produce broadcast storm, all effective broadbands will be occupied, and it is unavailable that network becomes.
Fig. 4 just lists out two CE equipment and adds two stub areas of formation in two layers of aggregation networks; The CE amount of equipment is not limited to two; New CE equipment also can insert above-mentioned two layers of aggregation networks through shared link, with the stub area of shared link group Cheng Xin, and corresponding new MSTP process.The adding of new CE equipment can not influence other original MSTP process, need not legacy network is adjusted.
Each regional MSTP process is independently selected the STP protocol type, can not influence each other between each process.When the topological structure from the MSTP process changes; The packet route that makes the MSTP of winner process is changed; Can send topologies change (Topology Change TC) message to the PE equipment 404 of forming shared link and PE equipment 405 from the MSTP process; PE equipment 404 and PE equipment 405 send to other PE equipment with the TC message, and two layers of aggregation networks refresh the MAC table according to the TC message, and said MAC table is two layers MAC table or three layers VLAN interface configuration information.
In whole double layer network, the BPDU that different MSTP processes is corresponding different, the foundation of difference different MS TP process is: the agreement id field of BPDU (2 byte) is always zero, and in the MSTP process, preceding 4 of this field is 1 entirely, and back 12 is the ID of record MSTP.The BPDU that shared link between PE equipment 404 and the PE equipment 405 can send each MSTP process carries out message, each its corresponding MSTP process of BPDU reflection.
Introduced the PE equipment of double layer network above and formed backbone area, in any two equipment of backbone area, added a plurality of CE equipment and form a plurality of stub areas, backbone area moves different protocol respectively with cancellation loop with each branch.The port member of VPLS network is added the loop problem that the MSTP process can be eliminated VPLS.Specific practice is: the link between the VPLS port is inserted CE equipment as shared link form stub area; Operation STP agreement; Said stub area correspondence is from the MSTP process; MSTP can calculate the stub area of needs cancellation loop according to BPDU, and blocks the said link that needs the stub area of cancellation loop, so just can eliminate the loop problem of VPLS network.
The beneficial effect of the embodiment of the invention: divide the different MSTP process of a plurality of regional isolated operations, the different STP agreement of each process operation has been eliminated different agreement type compatibility problem; The individual equipment change in topology only influences the in-process equipment of same MSTP; New CE equipment inserts can not influence original topological structure; The VPLS port is added the loop problem that the MSTP process just can solve VPLS.
Fig. 6 realizes the apparatus structure sketch map of MSTP multi-process for the embodiment of the invention.As shown in Figure 6, the device 600 of said realization MSTP multi-process comprises: host process agreement operation unit 601, and the backbone area that is used for forming at a plurality of provider edge equipments moves the STP agreement of this backbone area, the corresponding main MSTP process of said backbone area; Equipment access unit 602 is used for customer edge is inserted any two equipment of said a plurality of provider edge equipments, forms stub area, the STP agreement of operation self in said stub area, and said stub area correspondence is from the MSTP process; Link is provided with unit 603, is used for being set to choke free shared link through the link between said any two equipment of control STP parameter; Loop is eliminated unit 604, is used for said backbone area and calculates the stub area of said stub area needs cancellation loop according to BPDU, and block a link except said shared link in the said stub area that needs cancellation loop.
As shown in Figure 4; PE equipment 401,402,403,404,405 and 406 forms two layers of aggregation networks, forms backbone area, and host process agreement operation unit 601 moves the STP agreement in this backbone area; The PE amount of equipment gets final product more than or equal to two; Be not limited in above-mentioned six, the MSTP process that backbone area is corresponding is main MSTP process, is denoted as MSTP0 among the figure.Equipment access unit 602 is used for CE equipment 407 and CE equipment 408 are inserted two layers of aggregation networks through PE equipment 404 and PE equipment 405 respectively; Form stub area I and stub area ∏ respectively; The corresponding MSTP1 process of stub area I; The corresponding MSTP2 process of stub area ∏, MSTP1 process and MSTP2 process are from the MSTP process, move the STP agreement of self among stub area I and the stub area ∏ respectively.
The STP agreement of backbone area operation self; Loop is eliminated unit 604 calculates needs cancellation loop in the said stub area according to BPDU stub area; Blocking-up needs a link except said shared link in the stub area of cancellation loop then, prevents in whole network, to occur the loop phenomenon.
The beneficial effect of the embodiment of the invention: divide the different MSTP process of a plurality of regional isolated operations, the different STP agreement of each process operation has been eliminated different agreement type compatibility problem; The individual equipment change in topology only influences the in-process equipment of same MSTP.
Fig. 7 realizes the apparatus structure sketch map of MSTP multi-process for another embodiment of the present invention.As shown in Figure 7, the device of said realization MSTP multi-process also comprises: TC message unit 701 when the change in topology of said stub area, is used for said stub area and sends the TC message to said backbone area; Refresh unit 702 is used for said backbone area and refreshes the MAC table according to said TC message; BPDU message unit 703 is used for said backbone area and said stub area and sends the BPDU of self through said shared link, carries out privately owned message.
Fig. 8 is provided with the structural representation of unit 603 for link in the device of embodiment of the invention realization MSTP multi-process.As shown in Figure 8, said link is provided with unit 603 and comprises: priority level initializing module 801 is used for being set at the priority of said any two equipment the highest and inferior high respectively; Cost is provided with module 802, is used for said shared link and is set to 0 at said cost from the MSTP process; Territory configuration module 803 when said any two equipment operation MSTP agreements, is used for said any two equipment disposition in same territory.
As shown in Figure 4; Equipment access unit 602 inserts two layers of aggregation networks through PE equipment 404 and PE equipment 405 with CE equipment; Link between PE equipment 404 and the PE equipment 405 is a shared link; CE equipment can add two layers of aggregation networks through any two equipment of two layers of aggregation networks, and the link between these any two equipment is called as shared link.
Shared link between PE equipment 404 and the PE equipment 405 can not get clogged; Shared link between PE equipment 404 and PE equipment 405 gets clogged; Though from the MSTP process, there is not loop, CE equipment can form a big loop through PE equipment as shown in Figure 4 405,406,401,402,403,404 in proper order.Link is provided with unit 603 and is used for being set to clog-free shared link through the shared link between control STP parameter PE equipment 404 and the PE equipment 405.Priority level initializing module 801 is made as the priority of the equipment 404 at shared link two ends and 405 respectively the highest and inferior high, and specific practice is to make the root bridge location on equipment 404 or 405; Cost is provided with module 802 said shared links and is set to 0 at said Cost from the MSTP process; Whether the equipment 404 and 405 of judging the shared link two ends moves the MSTP agreement, if the equipment 404 at shared link two ends and 405 operation MSTP agreements, territory configuration module 803 with the equipment disposition at shared link two ends in same Multiple Spanning Tree (MST) region.Just there is not the notion of Multiple Spanning Tree (MST) region in the equipment 404 at shared link two ends and 405 if not operation MSTP agreement, need not carry out the Multiple Spanning Tree (MST) region configuration yet; If the equipment operation MSTP agreement at shared link two ends, need the Multiple Spanning Tree (MST) region of the equipment at shared link two ends be configured to identical, even the equipment at shared link two ends is in same Multiple Spanning Tree (MST) region.
Whether equipment 404 that can be through inspection shared link two ends and the clean culture MAC between the equipment 405 can reach and confirm whether said shared link gets clogged; Specific practice is: slave unit 404 sends clean culture MAC to equipment 405, clean culture MAC is sent, if clean culture MAC can arrive equipment 405 to equipment 405 through two layers of aggregation networks; Show that the link between equipment 404 and the equipment 405 is choke free; If clean culture MAC can not arrive equipment 405, show the link obstructions between equipment 404 and the equipment 405, this moment, equipment 407 and equipment 408 will form big loop with equipment 405, equipment 406, equipment 401, equipment 402, equipment 403 and equipment 404 respectively; Cause message continuous circulation hyperplasia in big loop; Produce broadcast storm, all effective broadbands will be occupied, and it is unavailable that network becomes.
Fig. 4 just lists out two CE equipment and adds two stub areas of formation in two layers of aggregation networks; The CE amount of equipment is not limited to two; Equipment access unit 602 can insert above-mentioned two layers of aggregation networks with new CE equipment through shared link; With the stub area of shared link group Cheng Xin, corresponding one new for the MSTP process.The adding of new CE equipment can not influence other original MSTP process, need not legacy network is adjusted.
Each regional MSTP process is independently selected the STP protocol type, can not influence each other between each process.When the topological structure from the MSTP process changes; The packet route that makes the MSTP of winner process is changed; Can send topologies change (Topology Change TC) message to the PE equipment 404 of forming shared link and PE equipment 405 from the MSTP process, PE equipment 404 and PE equipment 405 send to other PE equipment with the TC message, and two layers of aggregation networks utilize refresh unit 702; Refresh the MAC table according to the TC message, said MAC table is two layers MAC table or three layers VLAN interface configuration information.
In whole double layer network, the BPDU that different MSTP processes is corresponding different, the foundation of difference different MS TP process is: the agreement id field of BPDU (2 byte) is always zero, and in the MSTP process, preceding 4 of this field is 1 entirely, and back 12 is the ID of record MSTP.The BPDU that shared link between PE equipment 404 and the PE equipment 405 can utilize BPDU message unit 703 to send each MSTP process carries out message, each its corresponding MSTP process of BPDU reflection.
Introduced the PE equipment of double layer network above and formed backbone area, in any two equipment of backbone area, added a plurality of CE equipment and form a plurality of stub areas, backbone area moves different protocol respectively with cancellation loop with each branch.The port member of VPLS network is added the loop problem that the MSTP process can be eliminated VPLS.Specific practice is: utilize equipment access unit 602 that the link between the VPLS port is inserted CE equipment as shared link and form stub area; Operation STP agreement; Said stub area correspondence is from the MSTP process; MSTP can calculate the stub area of needs cancellation loop according to BPDU, and blocks the said link that needs the stub area of cancellation loop, so just can eliminate the loop problem of VPLS network.
The beneficial effect of the embodiment of the invention: divide the different MSTP process of a plurality of regional isolated operations, the different STP agreement of each process operation has been eliminated different agreement type compatibility problem; The individual equipment change in topology only influences the in-process equipment of same MSTP; New CE equipment inserts can not influence original topological structure; The VPLS port is added the loop problem that the MSTP process just can solve VPLS.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method that realizes the MSTP multi-process is characterized in that, said method comprises:
The STP agreement of the said backbone area of operation in the backbone area that a plurality of provider edge equipments are formed, the corresponding main MSTP process of said backbone area;
Customer edge is inserted any two equipment in said a plurality of provider edge equipment, form stub area, the STP agreement of the said stub area of operation in said stub area, said stub area correspondence is from the MSTP process; Said backbone area moves different MSTP processes respectively with each stub area, the different STP agreement of each process operation;
Link through between said any two equipment of control STP parameter is set to choke free shared link;
Said backbone area calculates the stub area of needs cancellation loop in the said stub area according to bridge protocol data unit B PDU, and blocks a link except said shared link in the said stub area that needs cancellation loop.
2. the method for claim 1 is characterized in that, said method also comprises:
When the change in topology of said stub area, said stub area sends the TC message to said backbone area;
Said backbone area refreshes the MAC table according to said TC message.
3. the method for claim 1 is characterized in that, said method also comprises:
When new customer edge inserts said backbone area through said any two equipment; Form the STP agreement of the said new stub area of operation in the new stub area at said new customer edge and said any two equipment, said new stub area corresponding new from the MSTP process.
4. the method for claim 1 is characterized in that, the said method that is set to clog-free shared link through the shared link between control STP parameter said any two equipment comprises:
Be made as the priority of said any two equipment the highest and inferior high respectively;
Said shared link is set to 0 at said cost from the MSTP process;
If any two the equipment operation MSTP agreements in said a plurality of provider edge equipments, then with said any two equipment disposition in same Multiple Spanning Tree (MST) region.
5. the method for claim 1 is characterized in that, said method also comprises:
Said backbone area and said stub area send the BPDU of self through said shared link.
6. a device of realizing the MSTP multi-process is characterized in that, said device comprises:
Host process agreement operation unit, the backbone area that is used for forming at a plurality of provider edge equipments moves the STP agreement of said backbone area, the corresponding main MSTP process of said backbone area;
The equipment access unit is used for customer edge is inserted any two equipment of said a plurality of provider edge equipments, forms stub area, the STP agreement of the said stub area of operation in said stub area, and said stub area correspondence is from the MSTP process; Said backbone area moves different MSTP processes respectively with each stub area, the different STP agreement of each process operation;
Link is provided with the unit, is used for being set to choke free shared link through the link between said any two equipment of control STP parameter;
Loop is eliminated the unit, is used for said backbone area and calculates the stub area of said stub area needs cancellation loop according to BPDU, and block a link except said shared link in the said stub area that needs cancellation loop.
7. device as claimed in claim 6 is characterized in that, said device also comprises:
The TC message unit when the change in topology of said stub area, is used for said stub area and sends the TC message to said backbone area;
Refresh unit is used for said backbone area and refreshes the MAC table according to said TC message.
8. device as claimed in claim 6 is characterized in that,
Said equipment access unit; Also be used for when new customer edge inserts said backbone area through said any two equipment; Form the STP agreement of the said new stub area of operation in the new stub area at said new customer edge and said any two equipment, said new stub area corresponding new from the MSTP process.
9. device as claimed in claim 6 is characterized in that, said link is provided with the unit and comprises:
The priority level initializing module is used for being set at the priority of said any two equipment the highest and inferior high respectively;
Cost is provided with module, is used for said shared link and is set to 0 at said cost from the MSTP process;
The territory configuration module when any two the equipment operation MSTP agreements in said a plurality of provider edge equipments, is used for said any two equipment disposition at same Multiple Spanning Tree (MST) region.
10. device as claimed in claim 6 is characterized in that, said device also comprises:
The BPDU message unit is used for said backbone area and said stub area and sends the BPDU of self through said shared link.
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| CN102143026B (en) * | 2011-04-29 | 2014-03-12 | 杭州华三通信技术有限公司 | Method for avoiding loop circuit in virtual two layer network |
| US20140185624A1 (en) * | 2011-06-20 | 2014-07-03 | Henri Mueller | Method for reactionless redundant coupling of communication networks by means of the rapid spanning tree protocol |
| CN104753866A (en) * | 2013-12-27 | 2015-07-01 | 中国移动通信集团公司 | Data transmission method and data transmission device |
| CN106559331B (en) * | 2015-09-30 | 2020-01-21 | 华为技术有限公司 | Message transmission method, device and network system in MSTP (Multi-service transport platform) network |
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