CN105939270A - Method and device for updating MSTP neighbor table - Google Patents
Method and device for updating MSTP neighbor table Download PDFInfo
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- CN105939270A CN105939270A CN201610053801.3A CN201610053801A CN105939270A CN 105939270 A CN105939270 A CN 105939270A CN 201610053801 A CN201610053801 A CN 201610053801A CN 105939270 A CN105939270 A CN 105939270A
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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
- H04L45/02—Topology update or discovery
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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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- 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
- H04L45/54—Organization of routing tables
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- Computer Networks & Wireless Communication (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention provides a method and a device for updating an MSTP (Multiple Spanning Tree Protocol) neighbor table. The method comprises the steps of recording an MSTP port with a state change when a network topology changes; setting a state change mark for the MSTP port with the state change; and starting an MSTP, and removing neighbor table items of the MSTO port with the state change mark based on the MSTP. In the method, as ports without the state change in the network topology are no longer eliminated, the problem of relatively slow convergence speed in the prior art can be solved.
Description
Technical field
The application relates to communication technical field, particularly relates to a kind of renewal MSTP (Multiple Spanning Tree
Protocol, Multiple Spanning Tree Protocol) method and device of neighbor table.
Background technology
In exchange network, loop networking can " be pruned " by MSTP becomes an acyclic tree network,
Thus avoid message hypertrophy in loop network and Infinite Cyclic.Meanwhile, MSTP is also equipped with link backup
Function, when network generation change in topology, backup link originally can switch to new primary link, with reality
The link switching of existing network traffics and convergence.
In the prior art, when network topology changes, the network equipment can remove all non-present ports
Neighbor entry, relearn the neighbor entry of this port the most again.Because the neighbor entry of this port is permitted
Multiport does not has the change of generation state, and therefore, the convergence rate of prior art is slower.
Summary of the invention
In view of this, the application provides a kind of method and device updating multiple spanning tree MSTP neighbor table, comes
Solve the problem that prior art convergence rate is slower.
Specifically, the application is achieved by the following technical solution:
First aspect according to the embodiment of the present application, it is provided that a kind of method updating MSTP neighbor table, described
Method is applied on MSTP equipment, and described method includes:
When network topology changes, the MSTP port that recording status changes；
The MSTP port changed for state arranges state change labelling；
Start MSTP agreement, remove the MSTP being provided with state change labelling based on described MSTP agreement
The neighbor entry of port.
Optionally, the MSTP port that described recording status changes includes:
Receive the change in topology TC message that neighbor device sends；
The MSTP port that state changes is determined based on described TC message.
Optionally, the described neighbours removing the port being provided with state change labelling based on described MSTP agreement
List item includes:
Create the work queue for removing neighbor entry；
Start described work queue, remove in MSTP port chained list based on described work queue and be provided with shape
The neighbor entry of the MSTP port of state change labelling；
After the neighbor entry of the MSTP port being provided with state change labelling has been removed, nullify described work
Make queue.
Optionally, described establishment includes for the work queue removing neighbor entry:
Judge whether equipment exists idle CPU；
When there is idle CPU, this free time CPU creates the work team for removing neighbor entry
Row.
Optionally, described method also includes:
At the end of network topology change, re-establish for the MSTP port removing neighbor entry
Neighbor entry.
Optionally, the MSTP port execution neighbor entry changed for state is used when removing
CPU, and is used when re-establishing neighbor entry for the MSTP port removing neighbor entry
CPU is different CPU.
Second aspect according to the embodiment of the present application, it is provided that a kind of device updating MSTP neighbor table, described
Device is applied to MSTP equipment, and described device includes:
Record unit, is used for when network topology changes, the MSTP port that recording status changes；
Arranging unit, the MSTP port for changing for state arranges state change labelling；
Clearing cell, is used for starting MSTP agreement, removes, based on described MSTP agreement, the state that is provided with and becomes
Change the neighbor entry of the MSTP port of labelling.
Optionally, described record unit specifically for:
Receive the change in topology TC message that neighbor device sends；
The MSTP port that state changes is determined based on described TC message.
Optionally, described clearing cell includes:
Create subelement, for creating the work queue for removing neighbor entry；
Promoter unit, is used for starting described work queue, removes MSTP end based on described work queue
Mouth chained list is provided with the neighbor entry of the MSTP port of state change labelling；
Nullify subelement, remove for being provided with the neighbor entry of the MSTP port of state change labelling
Cheng Hou, nullifies described work queue.
Optionally, described creating unit specifically for:
Judge whether equipment exists idle CPU；
When there is idle CPU, this free time CPU creates the work team for removing neighbor entry
Row.
Optionally, described device also includes:
Set up unit, at the end of network topology change, for the MSTP removing neighbor entry
Port re-establishes neighbor entry.
Optionally, the MSTP port execution neighbor entry changed for state is used when removing
CPU, and is used when re-establishing neighbor entry for the MSTP port removing neighbor entry
CPU is different CPU.
The application provides the method and device updating MSTP neighbor table, and MSTP equipment is by network topology
When changing, described MSTP equipment can be that the MSTP port that state changes arranges state change
Labelling, and when removing neighbor entry based on MSTP agreement, only remove and be provided with state change labelling
The neighbor entry of MSTP port, such that it is able to the neighbor entry for all of the port is all held in solution prior art
Row removing causes the slow problem of system convergence.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of method updating MSTP neighbor table in the embodiment of the present application；
Fig. 2 is a kind of hardware structure diagram that the application updates the device place equipment of MSTP neighbor table；
Fig. 3 is the embodiment block diagram that the application updates the device of MSTP neighbor table；
Fig. 4 is another embodiment block diagram that the application updates the device of MSTP neighbor table；
Fig. 5 is that the application is with another embodiment block diagram of the device of new MSTP neighbor table.
Detailed description of the invention
Here will illustrate exemplary embodiment in detail, its example represents in the accompanying drawings.Following retouches
Stating when relating to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.
Embodiment described in following exemplary embodiment does not represent all embodiment party consistent with the application
Formula.On the contrary, they only with describe in detail in appended claims, the application some in terms of mutually one
The example of the apparatus and method caused.
It is only merely for describing the purpose of specific embodiment at term used in this application, and is not intended to be limiting this
Application." a kind of ", " described " of singulative used in the application and appended claims
" it is somebody's turn to do " be also intended to include most form, unless context clearly shows that other implications.It is also understood that
Term "and/or" used herein refer to and comprise any of one or more project of listing being associated or
Likely combine.
Although should be appreciated that may use term first, second, third, etc. to describe various letter in the application
Breath, but these information should not necessarily be limited by these terms.These terms are only used for same type of information district each other
Separately.Such as, in the case of without departing from the application scope, the first information can also be referred to as the second information,
Similarly, the second information can also be referred to as the first information.Depend on linguistic context, word as used in this
" if " can be construed to " ... time " or " when ... time " or " in response to determining ".
See Fig. 1, for the schematic flow sheet of the method updating MSTP neighbor table a kind of in the embodiment of the present application.
Described embodiment is applied on MSTP equipment, and described MSTP equipment can be that router, switch etc. set
Standby.Described embodiment comprises the steps that
Step 101: when network topology changes, the MSTP port that recording status changes.
When network topology changes, described MSTP equipment can be sent out by neighbor device based on receive
TC (Topology Change, the change in topology) message sent, the MSTP port that the state of acquisition changes,
And carry out record.
This process is specifically as follows:
MSTP equipment can obtain the source port information of this message from TC message, then from current
MSTP neighbor table obtains the port information being connected with this source port.When getting the end being connected with this source port
During message breath, MSTP equipment can detect the current state of the port being connected with this source port, and will be with this source
State before the current state of port that port is connected changes with network topology compares, then basis
Comparative result determines the port that state changes.
State before the state current with the port that this source port is connected changes with network topology is identical
Time, it may be determined that the state of this port does not change；Otherwise, when the port being connected with this source port is worked as
Before state change from network topology before state different time, it may be determined that this port state generation
Change, now the port that this record changes as state can be carried out record by MSTP equipment.
In one example, when the port on MSTP equipment enables MSTP, MSTP equipment can be
This port arranges every port organization body, can preserve the information of this port in this every port organization body.Example
As, this every port organization body can preserve the current state of this port.MSTP equipment can use a chained list
Connecting every port organization body that the port of all unlatching MSTP is corresponding, this chained list is properly termed as spanning-tree port
Chained list.
When network topology changes, MSTP equipment can travel through in spanning-tree port chained list with TC message
The port that is connected of source port, and detect the state that this port is current.When the current state of this port and generation
When in tree port chained list, the state of this port is identical, it may be determined that the state of this port does not change；Instead
It, it may be determined that the state of this port there occurs change.
In one example, when the state of this port changes, this port can be carried out record.Its
In, the port record that can be changed as state by this port is at every port organization body corresponding to this port
In, it is also possible to the port record changed as state by this port is in newly-built port status change table.
Step 102: the MSTP port changed for state arranges state change labelling.
After the MSTP port that the state of have recorded changes, can be the MSTP that changes of state
Port arranges state change labelling.
MSTP equipment can pre-set a state change marker bit in every port organization body, works as MSTP
When the state of port changes, can be by state change marker bit set corresponding for this MSTP port.
In an example assumed, every port organization body can be expressed as:
When the state of this every port organization body corresponding ports changes, can be by this every port organization body
State change marker bit set, i.e. the value of state_change can be set to 1；When this every port organization body
When the state of corresponding ports does not change, state can not change marker bit set, i.e. can be by
The value of state_change is set to 0.
In another example, this state change labelling can be a MSTP that is specific and that change
The mark that port is corresponding.
Step 103: start MSTP agreement, removes based on described MSTP agreement and is provided with state change mark
The neighbor entry of the MSTP port of note.
After the MSTP port changed for state is provided with state change labelling, MSTP equipment is permissible
Judge whether idle CPU, when there is idle CPU, can create on this CPU and being used for removing
The work queue of neighbor entry.
Then, MSTP equipment can start this work queue, and removes MSTP end based on this work queue
Mouth chained list is provided with the neighbor entry of the MSTP port of state change labelling.
This reset procedure is specifically as follows:
The neighbor entry being provided with the MSTP port of state change labelling in MSTP port chained list is set to
Disarmed state.
When being provided with the neighbor entry of MSTP port of state change labelling and having removed, can be nullified this
Work queue.
It should be noted that the MSTP port changed for state performs to be made when neighbor entry is removed
CPU, and used when re-establishing neighbor entry for the MSTP port removing neighbor entry
CPU can be different CPU.
At the end of network topology change, MSTP equipment can be for the MSTP end removing neighbor entry
Mouth re-establishes neighbor entry.MSTP equipment can travel through in MSTP port chained list and remove neighbor entry
MSTP port, send neighbor request message, re-establish neighbor entry.
In this application, when network topology changes, described MSTP equipment can be that state becomes
The MSTP port changed arranges state change labelling, it is then possible to remove described based on described MSTP agreement
It is provided with the neighbor entry of the MSTP port of state change labelling, such that it is able to reach to update MSTP neighbours
The purpose of table.In this application, because no longer removing the port not occurring state to change in change in topology,
Therefore, it can solve the problem that prior art is lost time.
Below by specific embodiment, above example is described in detail:
When network topology changes, MSTP equipment can receive the TC message that neighbor device sends, and
Can obtain the source port information of this message by resolving this TC message, this source port information can include this source
The precedence information of port.Then, MSTP equipment can be according to this source port from current MSTP neighbours
Table obtains the port information being connected with this source port.When the port information being connected with this source port obtains successfully
Time, MSTP equipment can be from this port information or from every port organization of the port being connected with this source port
Body obtains the precedence information of the port being connected with this source port, and by the port that is connected with this source port
Priority contrasts with the priority of this source port.After obtaining comparing result, MSTP equipment can be from life
Become tree port chained list obtains priority and this source of the port being connected before network topology change with this source port
The comparing result of the priority of port.If the contrast before current comparing result changes with network topology is tied
The most identical, MSTP equipment can travel through the port being connected in spanning-tree port chained list with this source port, and detects
The state that this port is current.When the current state of this port and the state phase of this port in spanning-tree port chained list
Simultaneously, it may be determined that the state of this port does not change；Otherwise, it may be determined that the state of this port is sent out
Give birth to change.
If current comparing result is different from the comparing result before network topology change, MSTP equipment is permissible
Recalculate the current state of all of the port, when the current state of MSTP equipment all of the port has calculated,
MSTP equipment can travel through the port being connected in spanning-tree port chained list with this source port, and detect this port and work as
Front state.When the current state of this port with when in spanning-tree port chained list, the state of this port is identical, can
To determine that the state of this port does not change；Otherwise, it may be determined that the state of this port there occurs change.
When the state determining MSTP equipment upper port changes, the end that can change with recording status
Mouthful.The port record that can state be changed is in every port organization body that this port is corresponding, it is also possible to
Newly-built port status change table, and by this port record in port status change table.
After the port that the state of have recorded changes, can be that the port that state changes arranges state
Change labelling.MSTP equipment can pre-set a state change marker bit, when the shape of MSTP port
When state changes, can be by state change marker bit set corresponding for this port.Certainly, this state change
Labelling can also be a mark the most corresponding with the port changed.
After the MSTP port changed for state is provided with state change labelling, MSTP equipment is permissible
First judging whether idle CPU, when there is idle CPU, can create on this CPU for clear
Work queue except neighbor entry.
After this work queue creates successfully, MSTP equipment can start this work queue, and based on this work
Make queue to be arranged by the neighbor entry being provided with the MSTP port of state change labelling in MSTP port chained list
For invalid, thus complete the removing to neighbor entry.
It should be noted that the MSTP port changed for state performs to be made when neighbor entry is removed
CPU, and used when re-establishing neighbor entry for the MSTP port removing neighbor entry
CPU can be different CPU.
At the end of network topology change, MSTP equipment can be for the MSTP removing neighbor entry
Port sends neighbor request message, and re-establishes neighbor entry.
In the embodiment above, MSTP equipment is by when network topology changes, and described MSTP sets
Standby can be that the MSTP port that state changes arranges state change labelling, and based on MSTP agreement
When removing neighbor entry, only remove the neighbor entry of the MSTP port being provided with state change labelling, thus
The neighbor entry for all of the port can be solved in prior art be performed both by removing and cause system convergence speed relatively
Slow problem.
Corresponding with the embodiment of the method for aforementioned renewal MSTP neighbor table, present invention also provides renewal
The embodiment of the device of MSTP neighbor table.
The application updates the embodiment of the device of MSTP neighbor table and can apply on MSTP equipment.Device
Embodiment can be realized by software, it is also possible to realizes by the way of hardware or software and hardware combining.With soft
As a example by part realizes, as the device on a logical meaning, be the processor by its place equipment by non-easily
In the property lost memorizer, corresponding computer program instructions reads and runs formation in internal memory.From hardware view
Speech, as in figure 2 it is shown, update a kind of hardware configuration of the device place equipment of MSTP neighbor table for the application
Figure, in addition to the processor shown in Fig. 2, internal memory, network interface and nonvolatile memory, real
Execute the equipment at device place in example and generally can also include other hardware, such as the forwarding chip of responsible process message
Etc..
Refer to Fig. 3, update an embodiment block diagram of the device of MSTP neighbor table for the application:
This device may include that record unit 310, arranges unit 320 and clearing cell 330.
Record unit 310, is used for when network topology changes, the MSTP that recording status changes
Port；
Arranging unit 320, the MSTP port for changing for state arranges state change labelling；
Clearing cell 330, is used for starting MSTP agreement, removes based on described MSTP agreement and is provided with shape
The neighbor entry of the MSTP port of state change labelling.
In an optional implementation, described record unit 310 can be specifically for:
Receive the change in topology TC message that neighbor device sends；
The MSTP port that state changes is determined based on described TC message.
In an optional implementation, described clearing cell 330 can include (as shown in Figure 4):
Create subelement 330A, for creating the work queue for removing neighbor entry；
Promoter unit 330B, is used for starting described work queue, removes MSTP based on described work queue
Port chained list is provided with the neighbor entry of the MSTP port of state change labelling；
Nullify subelement 330C, clear for being provided with the neighbor entry of the MSTP port of state change labelling
After having removed, nullify described work queue.
In an optional implementation, described creating unit 330A can be specifically for:
Judge whether equipment exists idle CPU；
When there is idle CPU, this free time CPU creates the work team for removing neighbor entry
Row.
In an optional implementation, described device can also include (as shown in Figure 5):
Set up unit 340, at the end of network topology change, for removing neighbor entry
MSTP port re-establishes neighbor entry.
In an optional implementation, the MSTP port changed for state performs neighbor table
The CPU that item is used when removing, re-establishes neighbours with for the MSTP port removing neighbor entry
The CPU used during list item is different CPU.
In said apparatus, the function of unit and the process that realizes of effect specifically refer to corresponding step in said method
Rapid realizes process, does not repeats them here.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part sees
The part of embodiment of the method illustrates.Device embodiment described above is only schematically, wherein
The described unit illustrated as separating component can be or may not be physically separate, as unit
The parts of display can be or may not be physical location, i.e. may be located at a place, or also may be used
To be distributed on multiple NE.Some or all of module therein can be selected according to the actual needs
Realize the purpose of the application scheme.Those of ordinary skill in the art in the case of not paying creative work,
I.e. it is appreciated that and implements.
In the embodiment above, MSTP equipment is by when network topology changes, and described MSTP sets
Standby can be that the MSTP port that state changes arranges state change labelling, and based on MSTP agreement
When removing neighbor entry, only remove the neighbor entry of the MSTP port being provided with state change labelling, thus
The neighbor entry for all of the port can be solved in prior art be performed both by removing and cause system convergence speed relatively
Slow problem.
The foregoing is only the preferred embodiment of the application, not in order to limit the application, all in this Shen
Within spirit please and principle, any modification, equivalent substitution and improvement etc. done, should be included in this Shen
Within the scope of please protecting.
Claims (12)
1. the method updating multiple spanning tree MSTP neighbor table, it is characterised in that described method is applied to
On MSTP equipment, described method includes:
When network topology changes, the MSTP port that recording status changes；
The MSTP port changed for state arranges state change labelling；
Start MSTP agreement, remove the MSTP being provided with state change labelling based on described MSTP agreement
The neighbor entry of port.
Method the most according to claim 1, it is characterised in that described recording status changes
MSTP port includes:
Receive the change in topology TC message that neighbor device sends；
The MSTP port that state changes is determined based on described TC message.
Method the most according to claim 1, it is characterised in that described based on described MSTP agreement
The neighbor entry removing the port being provided with state change labelling includes:
Create the work queue for removing neighbor entry；
Start described work queue, remove in MSTP port chained list based on described work queue and be provided with shape
The neighbor entry of the MSTP port of state change labelling；
After the neighbor entry of the MSTP port being provided with state change labelling has been removed, nullify described work
Make queue.
Method the most according to claim 3, it is characterised in that described establishment is used for removing neighbor table
The work queue of item includes:
Judge whether equipment exists idle CPU；
When there is idle CPU, this free time CPU creates the work team for removing neighbor entry
Row.
Method the most according to claim 3, it is characterised in that described method also includes:
At the end of network topology change, re-establish for the MSTP port removing neighbor entry
Neighbor entry.
Method the most according to claim 5, it is characterised in that the MSTP changed for state
Port performs the CPU that used when neighbor entry is removed, and for the MSTP end removing neighbor entry
The CPU that mouth is used when re-establishing neighbor entry is different CPU.
7. the device updating multiple spanning tree MSTP neighbor table, it is characterised in that described device should
For MSTP equipment, described device includes:
Record unit, is used for when network topology changes, the MSTP port that recording status changes；
Arranging unit, the MSTP port for changing for state arranges state change labelling；
Clearing cell, is used for starting MSTP agreement, removes, based on described MSTP agreement, the state that is provided with and becomes
Change the neighbor entry of the MSTP port of labelling.
Device the most according to claim 7, it is characterised in that described record unit specifically for:
Receive the change in topology TC message that neighbor device sends；
The MSTP port that state changes is determined based on described TC message.
Device the most according to claim 7, it is characterised in that described clearing cell includes:
Create subelement, for creating the work queue for removing neighbor entry；
Promoter unit, is used for starting described work queue, removes MSTP end based on described work queue
Mouth chained list is provided with the neighbor entry of the MSTP port of state change labelling；
Nullify subelement, remove for being provided with the neighbor entry of the MSTP port of state change labelling
Cheng Hou, nullifies described work queue.
Device the most according to claim 9, it is characterised in that described creating unit specifically for:
Judge whether equipment exists idle CPU；
When there is idle CPU, this free time CPU creates the work team for removing neighbor entry
Row.
11. devices according to claim 9, it is characterised in that described device also includes:
Set up unit, at the end of network topology change, for the MSTP removing neighbor entry
Port re-establishes neighbor entry.
12. devices according to claim 11, it is characterised in that the MSTP changed for state
Port performs the CPU that used when neighbor entry is removed, and for the MSTP end removing neighbor entry
The CPU that mouth is used when re-establishing neighbor entry is different CPU.
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