CN105939275A - Method and device for computing MSTP domain - Google Patents
Method and device for computing MSTP domain Download PDFInfo
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- CN105939275A CN105939275A CN201510612286.3A CN201510612286A CN105939275A CN 105939275 A CN105939275 A CN 105939275A CN 201510612286 A CN201510612286 A CN 201510612286A CN 105939275 A CN105939275 A CN 105939275A
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- mstp
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/48—Routing tree calculation
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- Telephonic Communication Services (AREA)
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Abstract
The invention provides a method and a device for computing an MSTP domain. The method is applied to a network forwarding device in an MSTP, and comprises the steps of when a local network forwarding device receives an MSTP protocol message sent by an opposite-end network forwarding device, judging that whether the MSTP message meets a preset triggering condition; and if yes, re-computing an interface role according to the MSTP protocol message. Therefore, the computation quantity can be reduced when the MSTP is subjected to domain switching, and the convergence rate of the MSTP network is improved.
Description
Technical field
The present invention relates to communication technical field, particularly relate to computational methods and the device in a kind of MSTP territory.
Background technology
MSTP (Multiple Spanning Tree Protocol, Multiple Spanning Tree Protocol) is a kind of novel life
Becoming tree protocol, in addition to realizing the port status fast transferring mechanism of similar RSTP, MSTP introduces
The concept in " territory ", is divided into multiple territory an exchange network, forms many generations in the most each territory
Tree, between spanning tree independently of one another.Meanwhile, MSTP introduces again the concept of " example (Instance) ",
Multiple VLAN are mapped in an example.In MSTP, the calculating of each example topology is relatively independent,
The corresponding single spanning tree of the most each example.
MSTP agreement calculates the border of spanning tree and is typically to divide with " territory ", when adjacent network turns
When the territory configuration information of the equipment of sending out changes, the tree scope that MSTP agreement is calculated is likely to just occur
Change, the spanning-tree information causing local device to be previously calculated may be incorrect.The most traditional way
It is that the most first making self owns after local device detects the territory configuration information change of opposite equip.
The protocol status of interface, recalculates.Local device is so needed to spend the substantial amounts of process cycle
Process substantial amounts of agreement to calculate, and whole network convergence time can be caused long.
Summary of the invention
In view of this, the present invention provides the computational methods in a kind of MSTP territory and device existing to solve
MSTP territory calculate cycle length and network convergence time long problem.
Specifically, the present invention is achieved through the following technical solutions:
A kind of computational methods in MSTP territory, described method is applied to the network forwarding equipment in MSTP,
Described method includes:
When local terminal network forwarding equipment receives the MSTP protocol massages that correspondent network forwarding unit sends,
Judge whether described MSTP protocol massages meets preset trigger condition；
If meeting, then recalculate interface role according to described MSTP protocol massages.
Further, described judge whether described MSTP protocol massages meets preset trigger condition, including:
When the main interface of local terminal network forwarding equipment or replace the priority of interface message of interface higher than opposite end
During the priority of the MSTP protocol massages that the specified interface of network forwarding equipment sends, described MSTP assists
View message meets preset trigger condition.
Further, described recalculate interface role according to described MSTP protocol massages, including:
Aging described interface message, recalculates interface role according to described MSTP protocol massages.
Further, described judge whether described MSTP protocol massages meets preset trigger condition, also wrap
Include:
When the main interface of local terminal network forwarding equipment or replace the priority of interface message of interface less than opposite end
During the priority of the MSTP protocol massages that the specified interface of network forwarding equipment sends, described MSTP assists
View message meets preset trigger condition.
Further, described method also includes:
Ageing time is set for interface message, when after the ageing time time-out of described interface message, again counts
Calculate the interface role that described interface message is corresponding.
Based on identical design, the present invention also provides for the calculating device in a kind of MSTP territory, and described device should
Network forwarding equipment in MSTP, described device includes:
Trigger judging unit, for receiving what correspondent network forwarding unit sent at local terminal network forwarding equipment
During MSTP protocol massages, it is judged that whether described MSTP protocol massages meets preset trigger condition；
Recalculate unit, be used for when described MSTP protocol massages meets preset trigger condition, according to
Described MSTP protocol massages recalculates interface role.
Further, described triggering judging unit, specifically for the main interface at local terminal network forwarding equipment
Or replace interface interface message priority higher than correspondent network forwarding unit specified interface send
During the priority of MSTP protocol massages, determine that described MSTP protocol massages meets preset trigger condition.
Further, unit is recalculated, specifically for aging described interface message, according to described described in
MSTP protocol massages recalculates interface role.
Further, described triggering judging unit, be additionally operable to local terminal network forwarding equipment main interface or
The priority of the interface message replacing interface sends less than the specified interface of correspondent network forwarding unit
During the priority of MSTP protocol massages, determine that described MSTP protocol massages meets preset trigger condition.
Further, described device also includes:
Described aging judging unit, for arranging ageing time for interface message, when described interface message
After ageing time time-out, trigger and recalculate the interface role that described interface message is corresponding.
As can be seen here, the present invention can receive the MSTP protocol massages that correspondent network forwarding unit sends
Time, by judging whether described MSTP protocol massages meets preset trigger condition and determine the need for weight
Newly calculate interface role, such that it is able to reduce amount of calculation when MSTP carries out territory switching, improve MSTP
The convergence rate of network.
Accompanying drawing explanation
Fig. 1 is the process of the computational methods in a kind of MSTP territory in a kind of illustrative embodiments of the present invention
Flow chart；
The network calculating device place in the MSTP territory in a kind of illustrative embodiments of Fig. 2 present invention turns
The hardware structure diagram of the equipment of sending out；
The logic knot calculating device in a kind of MSTP territory in a kind of illustrative embodiments of Fig. 3 present invention
Composition.
Detailed description of the invention
In order to solve prior art exist problem, the present invention provide a kind of MSTP territory computational methods and
Device, can be when receiving the MSTP protocol massages that correspondent network forwarding unit sends, by judging
State MSTP protocol massages whether to meet preset trigger condition and determine the need for recalculating interface angle
Color, such that it is able to reduce amount of calculation when MSTP carries out territory switching, improves the convergence speed of MSTP network
Degree.
Refer to Fig. 1, be the calculating side in a kind of MSTP territory in a kind of illustrative embodiments of the present invention
The process chart of method, wherein said method is applied to the network forwarding equipment in MSTP, described method
Including:
Step 101, when local terminal network forwarding equipment receive correspondent network forwarding unit send MSTP association
During view message, it is judged that whether described MSTP protocol massages meets preset trigger condition；
If step 102 meets, then recalculate interface role according to described MSTP protocol massages.
In prior art, MSTP agreement calculates the role of total interface and is all uniformly processed, interface angle
Color determines the state of interface, during the MSTP protocol information change that interface receives, according to MSTP
The computing of state machine may have influence on the change of other interface role and state.Generally MSTP state machine
The rule run is that certain interface receives more excellent message, i.e. priority higher than the message being previously received, then
Influence whether the role selecting of other interface, otherwise then may not interfere with previous MSTP state machine and calculate
Interface role, it can thus be appreciated that and not all MSTP protocol massages can trigger local terminal network forwarding equipment
On the change of interface role and the change in MSTP territory at its place, therefore can be to receiving in the present invention
MSTP protocol massages judge, when its meet preset trigger condition time, just can trigger interface angle
Recalculating of color, if being unsatisfactory for, will not trigger recalculating of interface role.Such that it is able at MSTP
Carry out reducing amount of calculation during the switching of territory, improve the convergence rate of MSTP network.
Relationship change in view of local terminal Yu correspondent network forwarding unit has two kinds of situations.
It is a kind of that to be local terminal become identical territory from correspondent network forwarding unit by different territories.Due to local terminal net
Network forwarding unit example 0 can run through all territories, during therefore the change of interface role does not interferes with example 0
The calculating in territory.Territory in non-zero example is then separated from each other, the interface role of equipment in the most non-zero example
The calculating of the change meeting domain of influence.Specifically, when the main interface in the non-zero example of local terminal network forwarding equipment
Or replace interface interface message priority higher than correspondent network forwarding unit specified interface send
During the priority of MSTP protocol massages, the calculating in the territory of local terminal network forwarding equipment can be affected, then can be true
Fixed described MSTP protocol massages meets preset trigger condition.And local terminal network forwarding equipment can aging institute
State interface message, and recalculate interface role according to described MSTP protocol massages.
Additionally, when the main interface in the non-zero example of local terminal network forwarding equipment or the interface message of replacement interface
The priority of MSTP protocol massages that sends less than the specified interface of correspondent network forwarding unit of priority
Time, the calculating in the territory of local terminal network forwarding equipment can be affected, the most then determine described MSTP protocol massages
Meet preset trigger condition.
In addition, other MSTP protocol massages being unsatisfactory for trigger condition then do not interfere with local terminal network
The calculating in the territory of forwarding unit, recalculates interface role thus without triggering local terminal network forwarding equipment.
Such that it is able to reduce amount of calculation when MSTP carries out territory switching, improve the convergence rate of MSTP network.
Another kind is local terminal is become different territory from correspondent network forwarding unit by identical territory.Due to
Any message that same area does not receives is not processed, therefore when two phases when MSTP state machine carries out the calculating in territory
Network forwarding equipment even by same domain become not same area time, local terminal network forwarding equipment can be by for connecing
Message breath arranges ageing time, when, after the ageing time time-out of described interface message, triggering local terminal network
Forwarding unit recalculates the interface role that described interface message is corresponding.Therefore the present invention can utilize aging
Mechanism reduces amount of calculation, improves network convergence speed.
For making the purpose of the present invention, technical scheme and advantage clearer, below to the party of the present invention
Case is described in further detail.
In actual applications, local terminal and correspondent network forwarding unit can be that the MSTP that function is identical hands over
Change planes.MSTP switch needs the territory configuration letter inside the BPDU message that sent by connected switch
Breath judges that whether peer switches is with oneself belonging to same territory.Described territory configuration information generally includes territory
Name, revision level, VLAN and the mapping relations etc. of example, the most all of territory configuration information complete
Cause to illustrate that peer switches and self belong to same territory.Generally switch sends BPDU message
Time, the configuration of 16 octet signature that above-mentioned territory configuration information can be generated by HMAC-MD5 computing
Summary adds BPDU message to and is transmitted.
Assume switch A and switch b by when same area is not changing into same domain, the territory of switch A is joined
Confidence breath can change, and switch A can send the territory configuration letter after carrying change to switch b afterwards
The BPDU message of breath.
In the info state machine of switch b, when main interface or the replacement of example non-zero on switch b connect
When mouth receives the BPDU message of specified interface transmission of switch A, by the priority of this BPDU message
The priority of the interface MSTP message corresponding with this interface compares, if the priority of BPDU message
Time relatively low, then switch b needs the INFERIOR_DESIGNATED of the info state machine at MSTP
Following state machine variable is updated under state:
Info Is=AGED；
Reselect=TRUE；
Selected=FALSE；
Through above-mentioned renewal process after, state machine can aging current interface MSTP message, then basis
BPDU message recalculates interface role.
When the priority of interface MSTP message corresponding to this interface of priority ratio of this BPDU message is high
Time, owing to not having from this interface to other MSTP message before switch b, then MSTP
Info state machine can enter into SUPERIOR_DESIGNATED state, then can trigger state machine
Recalculate interface role, updated interface role and the interface shape of switch A simultaneously by message exchange
State.
Finally, the interface role of the whole network and state all can be computed correctly, and realize MSTP network
Fast Convergent.
Based on identical design, the present invention also provides for the calculating device in a kind of MSTP territory, and this device is permissible
Realized by software, it is also possible to realize by the way of hardware or software and hardware combining.Implemented in software it is
Example, the calculating device in the MSTP territory of the present invention, as the device on a logical meaning, is by its institute
Run after computer program instructions corresponding in memorizer is read by the CPU of equipment and form.
Refer to Fig. 2 and Fig. 3, be a kind of MSTP territory in a kind of illustrative embodiments of the present invention
Calculating device 300, described device is applied to the network forwarding equipment in MSTP, and this device runs substantially
Environment includes CPU, memorizer and other hardware, and from logic level, this device 300 includes:
Trigger judging unit 301, send out for receiving correspondent network forwarding unit at local terminal network forwarding equipment
During the MSTP protocol massages sent, it is judged that whether described MSTP protocol massages meets preset trigger condition；
Recalculate unit 302, be used for when described MSTP protocol massages meets preset trigger condition,
Interface role is recalculated according to described MSTP protocol massages.
Optionally, described triggering judging unit 301, specifically for connecing the master of local terminal network forwarding equipment
The priority of the interface message of mouth or replacement interface sends higher than the specified interface of correspondent network forwarding unit
During the priority of MSTP protocol massages, determine that described MSTP protocol massages meets preset trigger condition.
Optionally, unit 302 is recalculated, specifically for aging described interface message, according to institute described in
State MSTP protocol massages and recalculate interface role.
Optionally, described triggering judging unit 301, it is additionally operable to the main interface at local terminal network forwarding equipment
Or replace interface interface message priority less than correspondent network forwarding unit specified interface send
During the priority of MSTP protocol massages, determine that described MSTP protocol massages meets preset trigger condition.
Optionally, described device 300 also includes:
Aging judging unit 303, for arranging ageing time for interface message, when described interface message
After ageing time time-out, trigger and recalculate the interface role that described interface message is corresponding.
As can be seen here, the present invention can receive the MSTP protocol massages that correspondent network forwarding unit sends
Time, by judging whether described MSTP protocol massages meets preset trigger condition and determine the need for weight
Newly calculate interface role, such that it is able to reduce amount of calculation when MSTP carries out territory switching, improve MSTP
The convergence rate of network.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of protection of the invention.
Claims (10)
1. the computational methods in a MSTP territory, it is characterised in that described method is applied in MSTP
Network forwarding equipment, described method includes:
When local terminal network forwarding equipment receives the MSTP protocol massages that correspondent network forwarding unit sends,
Judge whether described MSTP protocol massages meets preset trigger condition；
If meeting, then recalculate interface role according to described MSTP protocol massages.
Method the most according to claim 1, it is characterised in that the described MSTP of described judgement assists
Whether view message meets preset trigger condition, including:
When the main interface of local terminal network forwarding equipment or replace the priority of interface message of interface higher than opposite end
During the priority of the MSTP protocol massages that the specified interface of network forwarding equipment sends, described MSTP assists
View message meets preset trigger condition.
Method the most according to claim 2, it is characterised in that described assist according to described MSTP
View message recalculates interface role, including:
Aging described interface message, recalculates interface role according to described MSTP protocol massages.
Method the most according to claim 1, it is characterised in that the described MSTP of described judgement assists
Whether view message meets preset trigger condition, also includes:
When the main interface of local terminal network forwarding equipment or replace the priority of interface message of interface less than opposite end
During the priority of the MSTP protocol massages that the specified interface of network forwarding equipment sends, described MSTP assists
View message meets preset trigger condition.
Method the most according to claim 1, it is characterised in that described method also includes:
Ageing time is set for interface message, when after the ageing time time-out of described interface message, again counts
Calculate the interface role that described interface message is corresponding.
6. the calculating device in a MSTP territory, it is characterised in that described device is applied in MSTP
Network forwarding equipment, described device includes:
Trigger judging unit, for receiving what correspondent network forwarding unit sent at local terminal network forwarding equipment
During MSTP protocol massages, it is judged that whether described MSTP protocol massages meets preset trigger condition；
Recalculate unit, be used for when described MSTP protocol massages meets preset trigger condition, according to
Described MSTP protocol massages recalculates interface role.
Device the most according to claim 6, it is characterised in that
Described triggering judging unit, specifically for local terminal network forwarding equipment main interface or replace interface
Interface message priority higher than correspondent network forwarding unit specified interface send MSTP agreement report
Literary composition priority time, determine that described MSTP protocol massages meets preset trigger condition.
Device the most according to claim 7, it is characterised in that
Described recalculate unit, specifically for aging described interface message, according to described MSTP agreement
Message recalculates interface role.
Device the most according to claim 6, it is characterised in that
Described triggering judging unit, is additionally operable at the main interface of local terminal network forwarding equipment or replaces interface
The MSTP protocol massages that the priority of interface message sends less than the specified interface of correspondent network forwarding unit
Priority time, determine that described MSTP protocol massages meets preset trigger condition.
Device the most according to claim 6, it is characterised in that described device also includes:
Described aging judging unit, for arranging ageing time for interface message, when described interface message
After ageing time time-out, trigger and recalculate the interface role that described interface message is corresponding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464436A (en) * | 2020-04-03 | 2020-07-28 | 中电科航空电子有限公司 | Method for solving single-port loop of RSTP (remote station transfer protocol) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510873A (en) * | 2002-12-26 | 2004-07-07 | 华为技术有限公司 | Multiple generation tree protocol based domain roots switching method |
| US20070008964A1 (en) * | 2005-07-07 | 2007-01-11 | Laurence Rose | Ring rapid spanning tree protocol |
| CN101222442A (en) * | 2008-01-29 | 2008-07-16 | 杭州华三通信技术有限公司 | Method and switch for multi-spanning tree case fast emigration |
| CN101232508A (en) * | 2008-02-26 | 2008-07-30 | 杭州华三通信技术有限公司 | Equipment and method for speeding up poly spanning tree protocol network topological convergence |
| CN101640681A (en) * | 2009-09-08 | 2010-02-03 | 杭州华三通信技术有限公司 | Method and devices for modifying domain configuration information of multi-spanning tree domain |
| CN101808045A (en) * | 2010-04-29 | 2010-08-18 | 迈普通信技术股份有限公司 | Method and exchange equipment for preventing old information message circulation in MSTP (Multiple Spanning Tree Protocol) |
| CN103200071A (en) * | 2013-04-07 | 2013-07-10 | 杭州华三通信技术有限公司 | MTSP multiple-case calculating method and MTSP multiple-case calculating equipment |
| CN103944828A (en) * | 2014-04-15 | 2014-07-23 | 杭州华三通信技术有限公司 | Method and equipment for transmitting protocol messages |
| CN105245457A (en) * | 2015-10-21 | 2016-01-13 | 盛科网络（苏州）有限公司 | Method and device for accelerating convergence speed of designated port in MSTP |
-
2015
- 2015-09-23 CN CN201510612286.3A patent/CN105939275B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1510873A (en) * | 2002-12-26 | 2004-07-07 | 华为技术有限公司 | Multiple generation tree protocol based domain roots switching method |
| US20070008964A1 (en) * | 2005-07-07 | 2007-01-11 | Laurence Rose | Ring rapid spanning tree protocol |
| CN101222442A (en) * | 2008-01-29 | 2008-07-16 | 杭州华三通信技术有限公司 | Method and switch for multi-spanning tree case fast emigration |
| CN101232508A (en) * | 2008-02-26 | 2008-07-30 | 杭州华三通信技术有限公司 | Equipment and method for speeding up poly spanning tree protocol network topological convergence |
| CN101640681A (en) * | 2009-09-08 | 2010-02-03 | 杭州华三通信技术有限公司 | Method and devices for modifying domain configuration information of multi-spanning tree domain |
| CN101640681B (en) * | 2009-09-08 | 2012-07-25 | 杭州华三通信技术有限公司 | Method and devices for modifying domain configuration information of multi-spanning tree domain |
| CN101808045A (en) * | 2010-04-29 | 2010-08-18 | 迈普通信技术股份有限公司 | Method and exchange equipment for preventing old information message circulation in MSTP (Multiple Spanning Tree Protocol) |
| CN103200071A (en) * | 2013-04-07 | 2013-07-10 | 杭州华三通信技术有限公司 | MTSP multiple-case calculating method and MTSP multiple-case calculating equipment |
| CN103944828A (en) * | 2014-04-15 | 2014-07-23 | 杭州华三通信技术有限公司 | Method and equipment for transmitting protocol messages |
| CN105245457A (en) * | 2015-10-21 | 2016-01-13 | 盛科网络（苏州）有限公司 | Method and device for accelerating convergence speed of designated port in MSTP |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464436A (en) * | 2020-04-03 | 2020-07-28 | 中电科航空电子有限公司 | Method for solving single-port loop of RSTP (remote station transfer protocol) |
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