CN100514959C - A method for implementing multiple spanning tree protocol on single spanning tree switching chip - Google Patents
A method for implementing multiple spanning tree protocol on single spanning tree switching chip Download PDFInfo
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- CN100514959C CN100514959C CNB031053661A CN03105366A CN100514959C CN 100514959 C CN100514959 C CN 100514959C CN B031053661 A CNB031053661 A CN B031053661A CN 03105366 A CN03105366 A CN 03105366A CN 100514959 C CN100514959 C CN 100514959C
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Abstract
The invention refers to a method for realizing communication protocol through exchanging the settings of chip in communication field. The invention is a method for realizing multi-spanning-tree protocol on a single spanning tree exchanging chip, applies to virtual local area network which supports IEEE802.1q and the exchanging chip of IEEE802.1d spanning tree protocol. The character lies in: through creating the correspondence relation between exchanging chip port and VLAN relation table, it binds the virtual local area network onto the spanning tree, realizes the multi-spanning-tree protocol and sets the ports state according to the spanning tree. By using the invention the MSTP protocol can be run on the exchanging chip which supports single spanning tree, accomplishes MSTP function by using the port character of VLAN, it reduces the cost of the current network device greatly.
Description
Technical field
The present invention relates to the communications field, relate in particular in the communications field the method that realizes communication protocol that is provided with by exchange chip.
Technical background.
IEEE802.1d and IEEE80.1w have provided the solution of avoiding data loopback and realize the redundant link backup in simple switched network; In order to adapt to many VLAN (VLAN, Virtual Local AreaNetwork) large-scale complicated switching network, IEEE802.1s Draft14 draft has further proposed Multiple Spanning Tree Protocol, i.e. MSTP (Multiple Spanning Tree Protocol).IEEE802.1s is divided into different territories with one to a plurality of switching equipment, in a territory, safeguard a plurality of spanning-tree instances (MSTI), allow the data message of different VLAN to transmit according to path separately, between all territories, then be connected in series, to guarantee the connectedness of the whole network by Common Spanning Tree (CST).This shows: the maximum feature of IEEE802.1S is exactly the diversity of spanning-tree instance.
Therefore, compare, realize that the exchange chip of IEEE802.1S requires to possess more new feature, but this determines when chip hardware designs with the exchange chip of traditional support IEEE802.1D.A large amount of switching equipment that present online operation are structured on the Single Spanning Tree exchange chip basis, how to realize the power of Multiple Spanning Tree Protocol on these chips, are great and real problems.
In list of references IEEE802.1d, proposed to realize in the switching equipment protocol of mono spanning-tree, but this scheme can't realize multiple spanning tree, in the network that a plurality of VLAN exist, can cause in the VLAN link imperfect; And do not provide the technical scheme that how on the traditional exchange chip, to realize multiple spanning tree.
In list of references IEEE802.1w, proposed to realize the protocol of mono spanning-tree in the switching equipment, and realized fast transferring under certain conditions.But this scheme can't realize multiple spanning tree, can cause in the VLAN link imperfect in the network that a plurality of VLAN exist, and the technical scheme that how to realize multiple spanning tree on the traditional exchange chip is not provided.
In list of references IEEE802.1s, proposed to realize the protocol of multiple spanning tree in the switching equipment, and realized fast transferring under certain conditions.But do not provide the technical scheme that how on the traditional exchange chip, to realize multiple spanning tree in this scheme.
IEEE802.1s has proposed to solve the New Deal of data loopback problem of the large complicated switching network of multi-VLAN, be Multiple Spanning Tree Protocol (MSTP), this protocol requirement exchange chip possesses many new features, as in an equipment, moving a plurality of independent spanning-tree instances simultaneously, Virtual Local Area Network in the network is tied to appointment generates tree, port status or the like is set according to example.
But a large amount of switching equipment that present online operation do not possess these chip features, thereby can't directly move Multiple Spanning Tree Protocol (MSTP).
Summary of the invention
Purpose of the present invention just provides a kind of method that realizes Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip, to solve the defective that at present a large amount of switching equipment can't directly move Multiple Spanning Tree Protocol.For this reason, the present invention adopts following scheme:
A kind of method of Multiple Spanning Tree Protocol that realizes on the Single Spanning Tree exchange chip comprises:
By setting up the corresponding relation between exchange chip middle port and the many virtual LAN VLAN relation table, devices enable is set or forbids Multiple Spanning Tree Protocol MSTP, VLAN is tied on the spanning-tree instance of appointment, the state of port on spanning-tree instance is set, the MSTP state of read port is realized Multiple Spanning Tree Protocol.
The state of described port on spanning-tree instance comprises a kind of in the following state:
Learning state, blocked state and forwarding state.
The described step that devices enable is set or forbids MSTP is the Single Spanning Tree agreement of chip directly to be set for opening or closing state.
On the described spanning-tree instance that VLAN is tied to appointment, be that the binding relationship of the spanning-tree instance by switch record VLAN and appointment is finished.
The described blocked state of port on spanning-tree instance that be provided with may further comprise the steps:
The binding relationship of record when a, inquiry binding;
B, with all belong to the VLAN deletion of this example on this port;
C, switch write down this port status.
The MSTP state of described read port comprises this port status that reads the switch record.
The described forwarding state of port on spanning-tree instance that be provided with may further comprise the steps:
The binding relationship of record when a, inquiry binding;
B, with all belong to the VLAN deletion of this example on this port;
The state of c, switch recording setting.
The MSTP state of described read port comprises the state that is provided with that reads the switch record.
Realize the method for Multiple Spanning Tree Protocol on the described Single Spanning Tree exchange chip, suitable hardware environment reaches the exchange chip of IEEE802.1d Spanning-Tree Protocol for supporting the IEEE802.1q VLAN.
Owing to adopt technical scheme of the present invention, can obtain following technique effect:
1) can on the exchange chip of traditional support Single Spanning Tree, move the MSTP agreement, utilize the VLAN and the port identity of chip, finish the various functions of MSTP.
2) in existing switch software system, only add a very thin MSTP simulation layer, just realized nearly all function, this will reduce the cost of the software upgrading of conventional network equipment greatly.
3) no matter to upper-layer protocol and user, still to lower floor's chip, the technical finesse of this scheme all is transparent.
Description of drawings
Fig. 1 is the port schematic diagram of a plurality of VLAN;
Fig. 2 is in the embodiment of the invention, a hierarchical design schematic diagram of software.
Embodiment
The following describes the specific embodiment of the present invention.
Existing Single Spanning Tree exchange chip, its VLAN relation table has shown the relation of port and VLAN, as shown in Figure 1, is the port schematic diagram of a plurality of VLAN, its middle port 3 and port 4 can belong to VLAN1 and VLAN2 simultaneously.As shown in table 1.
| VLAN1 | VLAN2 | |
| Port one | 1 | 0 |
| |
1 | 0 |
| |
1 | 1 |
| |
1 | 1 |
| |
0 | 1 |
| |
0 | 1 |
Table 1
We will set up corresponding relation between the port in above-mentioned VLAN relation table and the Single Spanning Tree chip, realize that MSTP is desired according to example port status to be set.We utilize learning state in the port status, blocked state, forwarding state etc. to finish the realization of Multiple Spanning Tree Protocol.
Technical scheme of the present invention is applicable to the VLAN of support IEEE802.1q and the exchange chip of IEEE802.1d Spanning-Tree Protocol, by setting up the corresponding relation between exchange chip middle port and the VLAN relation table, VLAN is tied on the spanning-tree instance, according to spanning-tree instance port status is set, realizes Multiple Spanning Tree Protocol.
Mainly comprise with the lower part:
1, devices enable/forbid MSTP agreement is set;
This function is that the Single Spanning Tree agreement that exchange chip directly is set is the opening/closing state.
2, VLAN is tied on the spanning-tree instance of appointment;
This function writes down above-mentioned binding relationship by switch can finish this binding.
3, the learning state of port on spanning-tree instance is set;
This function is that various operations are left intact, and directly returns success, and is learning state.
4, the blocked state of port on spanning-tree instance is set;
The setting of this blocked state can may further comprise the steps:
The binding relationship of record when binding in a, the inquiry 2;
B, with all belong to the VLAN deletion of this example on this port;
C, switch write down this port status.
5, the forwarding state of port on spanning-tree instance is set;
Being provided with of this forwarding state can may further comprise the steps:
The binding relationship of record when binding in a, the inquiry 2;
B, with all belong to the VLAN deletion of this example on this port;
The state of c, switch recording setting.
6, the MSTP state of read port.
The MSTP state of read port comprises this port status of switch reading and recording and the state of the setting that switch reads this record.
The realization of Multiple Spanning Tree Protocol mainly is to finish above-mentioned function, by the setting of above-mentioned 6 functions, can finish on the Single Spanning Tree exchange chip and realize Multiple Spanning Tree Protocol.
See a specific embodiment below:
As shown in Figure 2, be the system design of the present invention in the exchange software and hardware layering relevant with MSTP, here underline, the layering logic layers that this hierarchy is just done for specific implementation of the present invention is described, in actual the use, can there be multiple mode to finish above-mentioned functions, and not exclusively adopts foregoing software hierarchy mechanism, still utilize the VLAN of chip and the relation of port to simulate MSTP, such scheme is consistent with this patent in essence.
Here earlier this hierarchy is done simple an introduction:
MSTP protocol layer (MPL) is a software layer, realizes the state machine flow process that IEEE802.1S provides, and finally explains the content of bridge protocol data unit, realizes preventing loop and the redundant software logic that is equipped with.
Vlan management key-course (VML) is a software layer, for all kinds of VLAN and port operation provide unified interface.These operations comprise: VLAN creates, deletion, adds among the VLAN or deletion port member, for port is provided with the TAG attribute of VLAN, for port is provided with default vlan etc.VML also is responsible for transmitting the operation of MPL to bottom, and VML does not explain and is concerned about the MPL operation, directly is transparent to MSL, finishes the desired function of actual MPL jointly by MSL, SWDL, SWC.
MSTP simulation layer (MSL) is a software layer, is responsible for the MSTP agreement is converted to operation with the Single Spanning Tree protocol-compliant to all read-write operations of chip, thereby to the difference of upper strata shielding bottom chip.These operations comprise: the Multiple Spanning Tree Protocol of enable/disable equipment, obstruction, forwarding, the learning state of port on different spanning-tree instances is set, and the Multiple Spanning Tree Instance that Virtual Local Area Network is tied to appointment gets on or the like.
Exchange Drive Layer (SWDL) is directly to control the software layer of exchange chip, realizes the read-write to the exchange chip function register, all kinds of messages on process chip is received, and submit the upper strata according to type of message and handle.
Exchange chip (SWC) is a hardware layer, and in current scheme, exchange chip is not supported the coexistence of a plurality of generation trees.
Can MPL realize it being the necessary condition of equipment operation MSTP to the operation of bottom.The major part of this programme is exactly how to realize the desired operation of MPL, and these work are mainly finished in MSL, and MSL provides independence and the compatibility between bottom chip and the upper-layer protocol.
The specific implementation process is as follows:
1, the MSTP agreement of enable/disable equipment.
MPL will operate through VML and be transparent to MSL.MSL is converted to this operation the Single Spanning Tree STP agreement of enable/disable equipment.Call SWDL, exchange chip is set.
2, Virtual Local Area Network is tied on the spanning-tree instance of appointment
MPL will operate through VML and be transparent to MSL.MSL does not do any operation to SWDL and SWC with the binding relationship between software records VLAN and the spanning-tree instance.
3, port is set and on certain spanning-tree instance, is learning state.
MPL will operate through VML and be transparent to MSL.MSL does not do any actual treatment, directly returns success.
4, port is set and on certain spanning-tree instance, is blocked state.
MPL is transparent to MSL to operation through VML.MSL does following operation:
The binding relationship that inquiry MSL writes down in 2 obtains the index that all bind VLAN, handles these VLAN successively, that is:
The user configuration information that writes down among the inquiry VML, the original state of this port is not a blocked state on this port and the example if VLAN comprises, then make SWDL-SWC that chip is set, port is deleted in this VLAN, and the VLAN counter on the renewal port (characterizing the VLAN number that port belongs to).If the VLAN counter is kept to 0 on the port, then adds Management VLAN (can be any one legal VLAN), and call the SWDL-SWC chip and be set to block at the Single Spanning Tree status register of this port to port.
MSL is obstruction to port at the state recording of this example.
Because concerning chip, VLAN has no longer comprised this port (comprising though upper layer software (applications) is thought), so this port can't be received and dispatched the message of this VLAN, thereby plays the effect by the example port blocked.
These operations of MSL do not change the user's who keeps among the VML configuration (the TAG attribute of port-VLAN inclusion relation, port, the default vlan of port etc.), thereby make that all these operations of MSL are transparent to the upper-layer user.
5, port is set and on certain spanning-tree instance, is forwarding state.
MPL is transparent to MSL to operation through VML.MSL does following operation:
The binding relationship that inquiry MSL writes down in 2 obtains the index that all bind VLAN, handles these VLAN successively, that is:
User's configuration of writing down among the inquiry VML, this port was not forwarding state originally on this port and the example if VLAN comprises, then make SWDL-SWC that chip is set, VLAN is recovered to comprise this port, and upgrade the VLAN counter (characterizing the VLAN number that port belongs to) on the port.The user's configuration that keeps in inquiring about among the VML is called SWDL-SWC and is recovered the TAG information of this VLAN on port in the chip, if this VLAN is the default vlan of this port, then makes this setting in the SWDL-SWC recovery chip.If the VLAN counter increases to 1 from 0 on the port, then delete Management VLAN, and call the SWDL-SWC chip and be set to forwarding state at the Single Spanning Tree status register of this port from port.
MSL is forwarding with port at the state recording of this example.
Because all information on the port all are resumed, so this port will be allowed to receive and dispatch the message of all VLAN on this example, as long as port belongs to these VLAN.
These operations of MSL do not change the user's who keeps among the VML configuration (the TAG attribute of port-VLAN inclusion relation, port, the default vlan of port etc.), thereby make that all these operations of MSL are transparent to the upper-layer user.
6, the MSTP state of read port
MPL will operate through VML and be transparent to MSL.MSL does following operation:
The port status value that is recorded among the MSL is directly returned the upper strata, no longer chip is done any read operation by SWDL.
The present invention is because VML realizes the read-write configuration of domestic consumer to port, VLAN, and MSL is in order to finish the multiple spanning tree simulation, the port in the chip, vlan information have been done modification, can bring some corresponding influences, so VML also needs to filter through MSL to the read-write operation of bottom.
The specific implementation process is as follows.
7, the user adds certain port by VML in VLAN
After VML passed to MSL with operation, MSL did following operation:
If the port MSTP state that writes down among the MSL directly returns success for blocking.
If the port MSTP state that writes down among the MSL is for transmitting, and this port vlan counter that writes down among the MSL is 0, and the VLAN that will add is Management VLAN just, then: change this port vlan counter of preserving among the MSL into 1.Call the SWDL-SWC layer then chip is set, the single State Tree register that generates on the port is set to transmit.No longer chip is made the write operation that VLAN adds port, can return success.
If below neither satisfy, the operational order transparent transmission that then VLAN is added port is write chip to SWDL-SWC.After chip adds successfully, upgrade the port vlan counter that writes down among the MSL, and check whether become 1 from 0, chip is set port is deleted from Management VLAN if satisfy then will call SWDL-SWC, and call the Single Spanning Tree status register that SWDL-SWC is provided with this port of chip and be set to transmit.
8, the user deletes certain port by VML from VLAN
After VML passed to MSL with operation, MSL did following operation:
If the port MSTP state that writes down among the MSL then need not be provided with chip for blocking, can return success.
Otherwise the operational order transparent transmission that VLAN is deleted port is carried out chip operation to SWDL-SWC.After chip is deleted successfully, upgrade the port vlan counter that writes down among the MSL, if counter becomes 0, then call SWDL-SWC and chip is set port is added Management VLAN, and call the Single Spanning Tree status register that SWDL-SWC is provided with this port of chip and be set to block.
9, the user is provided with the default vlan of port by VML
After VML passed to MSL with operation, MSL did following operation:
If the port MSTP state that writes down among the MSL directly returns success for blocking.Otherwise transparent transmission is operated chip to SWDL-SWC.
10, port TAG whether on certain VLAN is set
After VML passed to MSL with operation, MSL did following operation:
If the port MSTP state that writes down among the MSL directly returns success for blocking.Otherwise transparent transmission is operated chip to SWDL-SWC.
The introducing of Management VLAN is based on following consideration: still belong to some VLAN though the user sees port, MSL may be provided with chip makes this port not belong to any VLAN, and insecure forwarding phenomenon may take place switching equipment in this case.For the guarantee agreement message can correctly be received and dispatched, we add a Management VLAN with this port, and the port Single Spanning Tree status register in the chip is set to transmit or block.These technical finesses are finished by MSL fully, and SWDL-SWC need not do any change, and the software on the MSL also need not be done any change.
Owing to adopt technical scheme of the present invention, can obtain following technique effect:
1) can on the exchange chip of traditional support Single Spanning Tree, move the MSTP agreement, utilize the VLAN and the port identity of chip, finish the various functions of MSTP.
2) in existing switch software system, only add a very thin MSTP simulation layer, just realized nearly all function, this will reduce the cost of the software upgrading of conventional network equipment greatly.
3) no matter to upper-layer protocol and user, still to lower floor's chip, the technical finesse of this scheme all is transparent.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (9)
1, a kind of method that realizes Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip is characterized in that this method comprises:
By setting up the corresponding relation between exchange chip middle port and the many virtual LAN VLAN relation table, devices enable is set or forbids Multiple Spanning Tree Protocol MSTP, VLAN is tied on the spanning-tree instance of appointment, the state of port on spanning-tree instance is set, the MSTP state of read port is realized Multiple Spanning Tree Protocol.
2, the method that realizes Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 1 is characterized in that, the state of described port on spanning-tree instance comprises a kind of in the following state:
Learning state, blocked state and forwarding state.
3, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 1, it is characterized in that the described step that devices enable is set or forbids MSTP is the Single Spanning Tree agreement of chip directly to be set for opening or closing state.
4, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 2, it is characterized in that, on the described spanning-tree instance that VLAN is tied to appointment, be that the binding relationship of the spanning-tree instance by switch record VLAN and appointment is finished.
5, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 4, it is characterized in that the described blocked state of port on spanning-tree instance that be provided with may further comprise the steps:
The binding relationship of record when a, inquiry binding;
B, with all belong to the VLAN deletion of this example on this port;
C, switch write down this port status.
6, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 5, it is characterized in that the MSTP state of described read port comprises this port status that reads the switch record.
7, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 4, it is characterized in that the described forwarding state of port on spanning-tree instance that be provided with may further comprise the steps:
The binding relationship of record when a, inquiry binding;
B, with all belong to the VLAN deletion of this example on this port;
The state of c, switch recording setting.
8, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 7, it is characterized in that the MSTP state of described read port comprises the state that is provided with that reads the switch record.
9, realize the method for Multiple Spanning Tree Protocol on the Single Spanning Tree exchange chip as claimed in claim 1, it is characterized in that the hardware environment that is suitable for reaches the exchange chip of IEEE802.1d Spanning-Tree Protocol for supporting the IEEE802.1q VLAN.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7965621B2 (en) | 2005-06-14 | 2011-06-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for failure handling in a network |
| CN101552697B (en) * | 2009-05-06 | 2011-04-13 | 深圳市普联技术有限公司 | Network access apparatus upgrade system and network access apparatus upgrade method |
| CN101938398B (en) * | 2009-06-29 | 2012-12-19 | 深圳市联软科技有限公司 | Generation method, system and server of equipment positioning relationship table |
| CN101616163B (en) * | 2009-07-27 | 2012-11-28 | 中兴通讯股份有限公司 | Method and device for processing precise time transfer protocol message |
| CN101854358B (en) * | 2010-05-10 | 2013-01-23 | 北京东土科技股份有限公司 | Realization method of multiple-spanning-tree link switching performance optimization |
| CN105939272B (en) * | 2015-11-25 | 2019-09-06 | 杭州迪普科技股份有限公司 | A kind of calculation method and device of MSTP |
| CN107508772B (en) * | 2016-06-14 | 2021-03-16 | 中兴通讯股份有限公司 | Method and system for realizing Ethernet locking signal function |
| CN114070788B (en) * | 2021-11-05 | 2023-03-24 | 电信科学技术第五研究所有限公司 | Method for realizing STP by switch under switching chip not supporting STP |
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