CN106789630B - A kind of network protection method and system, controller, equipment - Google Patents
A kind of network protection method and system, controller, equipment Download PDFInfo
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- CN106789630B CN106789630B CN201611261273.7A CN201611261273A CN106789630B CN 106789630 B CN106789630 B CN 106789630B CN 201611261273 A CN201611261273 A CN 201611261273A CN 106789630 B CN106789630 B CN 106789630B
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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
- H04L45/22—Alternate routing
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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
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L45/74—Address processing for routing
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- Computer Networks & Wireless Communication (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of network protection method and system, controller, equipment to improve the reliability of network to solve the problems, such as prior art service disconnection.Network protection method includes: that controller receives the first warning information that the equipment in network reports, and determines that disconnected fibre occurs for the first link；Link flow table configuration of the controller to hair band Diagnosis of Links mechanism under equipment, until receiving the first feedback information of equipment transmission or receiving after preset time the second warning information of equipment transmission；First feedback information is to be reported to controller after equipment creates the second link according to the link flow table configuration received, and determine the available information of the second link by controller；Second warning information is that controller determines the not available information of the second link；After controller receives the first feedback information, flow table instruction is sent, flow table instruction replaces the first link, the first link of removal with the second link for controlling equipment, the second link is added into former protection group.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of network protection method and system, controller, equipment.
Background technique
Software defined network (Software Defined Network, SDN) is as a kind of novel network architecture, core
The heart is forwarding and control separation, the centralized control for realizing network, fast deployment.Under SDN framework, controls and moved on in plane
SDN controller, SDN equipment carry out message forwarding according to the instruction of controller.
In the SDN network of the business such as carrying set-off special line, reliability is to measure one of the core index of network quality.Net
Network scale is bigger, bandwidth is bigger, and the requirement to network reliability is also higher.In existing protection technique, linear 1:1 protection
Technology is a kind of most common protected mode.In traditional linear 1:1 protection technique, need to establish work, two paths of protection.
After working path failure, failure is perceived by fast detection mechanism, is switched to Protection path.If operating path always can not be extensive
It is multiple, and Protection path breaks down will can be used without path again at this time, and then leads to service disconnection.
For example, as shown in Figure 1, in traditional linear 1:1 protection technique, if Protection path A- > C- > E breaks down,
Only report and alarm at this time, it is without any processing.If Protection path A- > C- > E failure is not restored, and operating path A- > B- > E is again
It breaks down, will lead to service disconnection.
For example, as shown in Fig. 2, in traditional linear 1:1 protection technique, if operating path A- > B- > E breaks down,
It can be switched to Protection path A- > C- > E, if working path failure restores, switchback is decided whether according to return mode and WTR
With the time of switchback.But if working path failure can not restore, and Protection path breaks down again at this time, will lead to
Service disconnection.
As network carrying amount is increasing, once this failure occurs, consequence will be it is catastrophic, network interruption is to visitor
The influence at family is immeasurable.For the abnormal scene of service disconnection, 1:1 linear protection be can no longer meet in traditional network
Rigors of the present network to reliability.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of network protection method and system, controller, equipment, to solve
Certainly the problem of prior art service disconnection, the reliability of network is improved.
A kind of network protection method provided in an embodiment of the present invention, which comprises
The first warning information that the equipment that controller receives in the network reports determines that disconnected fibre occurs for the first link；Its
In, first warning information is that the equipment detects the information reported when first link down；
Link flow table configuration of the controller to hair band Diagnosis of Links mechanism under the equipment, until receiving the equipment hair
The first feedback information for sending receives the second warning information that the equipment is sent after preset time；First feedback letter
Breath is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by institute
It states controller and determines the available information of the second link；Second warning information is the equipment according to the institute received
It is reported to the controller after stating link flow table configuration the second link of creation, and second link is determined by the controller
Not available information；
After controller receives first feedback information, the flow table instruction for replacement is sent, the flow table instruction is used
First link, removal first link are replaced and by described second in controlling the equipment with second link
Link is added in the former protection group on the current device.
By network protection method provided in an embodiment of the present invention, controller is determining that it is disconnected fine that the first link occurs in this method
Afterwards, to the link flow table configuration of hair band Diagnosis of Links mechanism under equipment, equipment creates the according to the link flow table configuration received
Two links after controller receives the first feedback information, send the flow table instruction for replacement, and flow table is instructed for controlling equipment
The former protection for replacing the first link with the second link, removing the first link and being added to the second link on the current device
In group, such embodiment of the present invention ensure that any moment all has two paths, be able to solve prior art service disconnection
Problem improves the reliability of network.
Preferably, first link is the protection link or active link in the network；
When first link is protection link, second link is the equipment according to the link received
The new protection link of flow table configuration creation；
When first link is active link, second link is the equipment according to the link received
The new active link of flow table configuration creation.
Preferably, if first link is active link, what the equipment that the controller receives in the network reported
After first warning information, before disconnected fibre occurs for first link of determination, this method further include:
The controller transmission link switch messages give the equipment, control the equipment for current business and switch to protection
Link.
Preferably, described remove first link, comprising:
Control the Diagnosis of Links mechanism for first chain road that the equipment is deleted on current device；
Control the flow table and group table of first chain road that the equipment is deleted on current device.
Preferably, the first warning information that the equipment that the controller receives in the network reports, determines the first link
Disconnected fibre occurs, comprising:
After controller receives the first warning information that the equipment reports, starts timer, record first link
Fault time；
If the controller is not received by the link failure that the equipment is sent in the timing of the timer
The warning information of disappearance, it is determined that disconnected fibre occurs for the first link.
The embodiment of the invention also provides a kind of network protection methods, which comprises
Equipment in network issues warning information when detecting the first link down, and the warning information is reported to control
Device processed；
Equipment receives the link flow table configuration with Diagnosis of Links mechanism that the controller issues, and is matched according to the link flow table
The second link of creation is set, and to first feedback information of controller report or the second warning information；First feedback information
It is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by described
Controller determines the available information of the second link；Second warning information is that the equipment is according to what is received
It is reported to the controller after link flow table configuration the second link of creation, and second link is determined not by the controller
Available information；
Equipment receives the flow table instruction for replacement that the controller is sent, and is instructed according to the flow table with described second
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
Preferably, first link is the protection link or active link in the network；
When first link is protection link, second link is the equipment according to the link received
The new protection link of flow table configuration creation；
When first link is active link, second link is the equipment according to the link received
The new active link of flow table configuration creation.
Preferably, if first link be active link, it is described the warning information is reported to controller after, if
Before the link flow table configuration with Diagnosis of Links mechanism that the standby reception controller issues, this method further include:
The equipment receives the link switchover information that controller is sent, and is switched current business according to the link switchover information
To protection link.
Preferably, described replace first link according to flow table instruction second link, comprising: according to institute
State flow table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is protection link, the modification multiprotocol label switching rapid failure protection group table, packet
It includes:
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, packet
It includes:
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link.
Preferably, described remove first link, comprising:
The flow table of first chain road is set to aging immediately by the equipment, and establish one can periodic wakeup appoint
Business periodically updates flow table state and executes burnin operation, when the equipment has detected aging stream, completes first chain
The removal on road, and event notification information is sent to the controller.
The embodiment of the invention also provides a kind of controller, the controller includes:
Network state determining module, the first warning information reported for receiving the equipment in the network, determines first
Disconnected fibre occurs for link；Wherein, first warning information is that the equipment detects the letter reported when first link down
Breath；
Link establishment control module, for being configured to the link flow table of hair band Diagnosis of Links mechanism under the equipment, until
Receive the first feedback information or the second alarm letter that the equipment is sent is received after preset time that the equipment is sent
Breath；First feedback information is to be reported to after the equipment creates the second link according to the link flow table configuration received
The controller, and the available information of the second link is determined by the controller；Second warning information is described
Equipment is reported to the controller after creating the second link according to the link flow table configuration received, and by the controller
Determine the not available information of the second link；
Link removes control module, after receiving first feedback information, sends the flow table instruction for replacement,
Flow table instruction for control the equipment with second link replace first link, removal first link,
And second link is added in the former protection group on the current device.
Preferably, first link is the protection link or active link in the network；
When first link is protection link, second link is the equipment according to the link received
The new protection link of flow table configuration creation；
When first link is active link, second link is the equipment according to the link received
The new active link of flow table configuration creation.
Preferably, the network state determining module is in receiving the network if first link is active link
The first warning information for reporting of equipment after, determine the first link occur it is disconnected it is fine before, be also used to transmission link switch messages
To the equipment, the equipment is controlled by current business and switches to protection link.
It is specifically used for preferably, the link removes control module, sends the flow table instruction for replacement, set described in control
The standby Diagnosis of Links mechanism for deleting first chain road on current device, and the control equipment are deleted on current device
First chain road flow table and group table.
Preferably, the network state determining module is specifically used for, the first warning information that the equipment reports is received
Afterwards, start timer, record the first link failure time；If being not received by the timing of the timer
The warning information that the link failure that the equipment is sent disappears, it is determined that disconnected fibre occurs for the first link.
The embodiment of the invention also provides a kind of equipment, the equipment includes:
Warning information reporting module issues warning information, and the alarm is believed when for detecting the first link down
Breath is reported to controller；
Link establishment module, the link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller, root
The second link of creation is configured according to the link flow table, and to first feedback information of controller report or the second warning information；Institute
Stating the first feedback information is that the equipment is according to being reported to after link flow table configuration the second link of creation received
Controller, and the available information of the second link is determined by the controller；；Second warning information is the equipment
It is reported to the controller after creating the second link according to the link flow table configuration received, and is determined by the controller
The not available information of second link out；
Link replacement module, the flow table instruction for replacement sent for receiving the controller, according to the flow table
Instruction replaces first link with second link, removes first link, and second link is added to
In former protection group on the current device；The flow table instruction is to send after the controller receives first feedback information
Instruction.
Preferably, first link is the protection link or active link in the network；
When first link is protection link, second link is the equipment according to the link received
The new protection link of flow table configuration creation；
When first link is active link, second link is the equipment according to the link received
The new active link of flow table configuration creation.
Preferably, the warning information reporting module is by the warning information if first link is active link
It is reported to after controller, the link flow with Diagnosis of Links mechanism that the link establishment module is issued in the reception controller
Before table configuration, the warning information reporting module is also used to receive the link switchover information of controller transmission, according to the link
Current business is switched to protection link by switch messages.
Preferably, the link replacement module is specifically for quick according to the flow table instruction modification multiprotocol label switching
Fail safe group table；
When first link is protection link, the modification multiprotocol label switching rapid failure protection group table, packet
It includes:
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, packet
It includes:
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to described second
The group table of link.
Preferably, the link replacement module is specifically used for, the flow table of first chain road is set to aging immediately, and
Establish one can periodic wakeup task, periodically update flow table state and simultaneously execute burnin operation, when having detected aging
When stream, the removal of first link is completed, and sends event notification information to the controller.
The embodiment of the invention also provides a kind of network protection systems, including controller and several it is connect with the controller
Equipment；
The controller, the first warning information reported for receiving the equipment in the network determine that the first link is sent out
Raw disconnected fibre；Wherein, first warning information is that the equipment detects the information reported when first link down；And
For the link flow table configuration to hair band Diagnosis of Links mechanism under the equipment, sent until receiving the equipment
The first feedback information or the second warning information that the equipment is sent is received after preset time；First feedback information
It is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by described
Controller determines the available information of the second link；Second warning information is that the equipment is according to what is received
It is reported to the controller after link flow table configuration the second link of creation, and second link is determined not by the controller
Available information；And
After receiving first feedback information, the flow table instruction for replacement is sent, the flow table instruction is used for
The equipment is controlled with second link to replace first link, remove first link and by second chain
Road is added in the former protection group on the current device；
The equipment issues warning information, and the warning information is reported to when for detecting the first link down
Controller；And
The link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller, matches according to the link flow table
The second link of creation is set, and to first feedback information of controller report or the second warning information；First feedback information
It is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by described
Controller determines the available information of the second link；；Second warning information is the equipment according to the institute received
It is reported to the controller after stating link flow table configuration the second link of creation, and second link is determined by the controller
Not available information；And
The flow table instruction for replacement sent for receiving the controller, instructs according to the flow table with described second
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
Detailed description of the invention
Fig. 1 is prior art Protection path failure schematic diagram；
Fig. 2 is prior art working path failure schematic diagram；
Fig. 3 is SDN network topological diagram；
Fig. 4 is a kind of network protection method flow chart provided in an embodiment of the present invention；
Fig. 5 is another network protection method flow chart provided in an embodiment of the present invention；
Fig. 6 is newly-built Protection path schematic diagram after the Protection path failure that the embodiment of the present invention one provides；
Fig. 7 is the newly-built Protection path work flow diagram that the embodiment of the present invention one provides；
Fig. 8 is that the newly-built Protection path that the embodiment of the present invention one provides extracts direction flow table composition；
Fig. 9 is the newly-built Protection path termination direction flow table composition that the embodiment of the present invention one provides；
Figure 10 is newly-built operating path schematic diagram after working path failure provided by Embodiment 2 of the present invention；
Figure 11 is newly-built operating path work flow diagram provided by Embodiment 2 of the present invention；
Figure 12 is that newly-built operating path provided by Embodiment 2 of the present invention extracts direction flow table composition；
Figure 13 is newly-built operating path termination direction flow table composition provided by Embodiment 2 of the present invention；
Figure 14 is a kind of structural block diagram of controller provided in an embodiment of the present invention；
Figure 15 is a kind of structural block diagram of equipment provided in an embodiment of the present invention；
Figure 16 is a kind of network protection systems structural block diagram provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of network protection method and system, controller, equipment, to solve the prior art
The problem of service disconnection, improves the reliability of network.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The specific embodiment of the invention is only illustrated and verifies under the framework of SDN, but its protection model for being illustrated
It is equally applicable on traditional network with technical thought.
SDN network topological diagram under SDN framework is as shown in figure 3, SDN controller passes through management network-control SDN equipment, figure
SDN equipment in 3 includes that equipment A, equipment B, equipment C, equipment D and equipment E, SDN controller pass through SDN southbound interface to each
Equipment carries out business configuration.
OpenFlow agreement is earliest, most common SDN southbound interface agreement in the industry, but SDN does not limit southbound interface
It must be OpenFlow, the OpenFlow1.3.4 agreement of standard is unable to satisfy the demand for supporting 1:1 protection business, such as: Wu Fapei
The Diagnosis of Links mechanism such as OAM, two-way converting detection (Bidirectional Forwarding Detection, BFD) are set, are needed
Other southbound interface cooperations are completed, and the most commonly used is netconf agreements, common by OpenFlow agreement and netconf agreement
To carry out multiprotocol label switching (Multi-Protocol Label Switching, MPLS) basic service, OAM and protection phase
The configuration of pass.
As shown in figure 4, the specific embodiment of the invention provides a kind of network protection method, this method comprises:
It is disconnected to determine that the first link occurs for the first warning information that the equipment that S401, controller receive in the network reports
It is fine；Wherein, first warning information is that the equipment detects the information reported when first link down；
The link flow table configuration of S402, controller to hair band Diagnosis of Links mechanism under the equipment, it is described until receiving
The first feedback information or the second warning information that the equipment is sent is received after preset time that equipment is sent；Described first
Feedback information is to be reported to the controller after the equipment creates the second link according to the link flow table configuration received,
And the available information of the second link is determined by the controller；Second warning information is the equipment according to reception
To link flow table configuration the second link of creation after be reported to the controller, and determine described the by the controller
The not available information of two links；
After S403, controller receive first feedback information, the flow table instruction for replacement is sent, the flow table refers to
Enable and replace first link for controlling the equipment second link, remove first link and will described in
Second link is added in the former protection group on the current device.
As shown in figure 5, the specific embodiment of the invention additionally provides another network protection method, comprising:
Equipment in S501, network issues warning information when detecting the first link down, and will be on the warning information
Offer controller；
S502, equipment receive the link flow table configuration with Diagnosis of Links mechanism that the controller issues, according to the link
Flow table configuration the second link of creation, and to first feedback information of controller report or the second warning information；Described first is anti-
Feedforward information is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and
The available information of second link is determined by the controller；Second warning information is the equipment according to receiving
Link flow table configuration the second link of creation after be reported to the controller, and determine described second by the controller
The not available information of link；
S503, equipment receive the flow table instruction for replacement that the controller is sent, and use institute according to flow table instruction
It states the second link to replace first link, remove first link, and second link is added to this and is currently set
In standby upper former protection group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
Specifically, the first link in the specific embodiment of the invention is protection link or active link；When the first link is
When protecting link, the second link is new protection link of the equipment according to the link flow table configuration creation received；When the first chain
When road is active link, the second link is new active link of the equipment according to the link flow table configuration creation received.
With reference to the accompanying drawing and specific embodiment introduces feelings when the first link is respectively protection link and active link
Condition.
Embodiment one:
The first link in the specific embodiment of the invention one is protection link.
Specific embodiment of the invention business basic configuration step is as follows:
Step 1:SDN equipment establishes OpenFlow agreement with SDN controller and connects with netconf agreement, each equipment
The resource information for reporting itself, the resource information reported include flow table, group table, YANG etc.；
After step 2:SDN controller and SDN equipment complete connection, SDN controller passes through OpenFlow protocol definition
Packet out and packet in message sends and receives LLDP message, to complete the physical topology connection relationship of SDN equipment；
The forwarding of LLDP message is same as the prior art, and which is not described herein again；
Flow table, group table on equipment A configuration ethernet business of the step 3:SDN controller by OpenFlow protocol definition
It extracts, ether network packet is encapsulated as MPLS message；The label resources of SDN controller the whole network under the overall leadership are distributed to each path and are marked
Label；
Step 4:SDN controller configures equipment B and equipment C as intermediate P-node by flow table, group table and carries out MPLS label
Exchange；
Step 5:SDN controller configuration facility E is MPLS business terminating node, and terminate MPLS message, is descapsulated into original
Ether network packet；
Step 6:SDN controller passes through the OpenFlow agreements such as netconf protocol configuration MPLS-TP OAM, BFD and protection
The resource that can not be configured, creates work path and Protection path on equipment A and equipment E, while OAM is carried out on two paths
(or BFD) relevant configuration (3.3ms CC etc.).Since carrier class network needs to meet the switching time of 50ms, CC message is not
It can be transmitted, can only be configured according to SDN controller by equipment by packet out/in message LLDP message as before
OAM (or BFD) information itself group packet sends and receives, to meet the requirement of performance.
By the above business basic configuration step, SDN controller have been completed basic MPLS business and OAM (or
BFD), relaying configuration, A- > B- > E is operating path in Fig. 6, and A- > C- > E is Protection path.After the completion of above-mentioned configuration, SDN
Equipment is all running Diagnosis of Links mechanism OAM (or BFD) on operating path and Protection path, utilizes OAM (or BFD), SDN
Controller monitors the fault condition of operating path and Protection path simultaneously.
As shown in fig. 6, protection link A- > C- > E is the first link of the specific embodiment of the invention, link A- > D- > E is protected
For the second link of specific embodiment of the invention equipment creation, after protecting link A- > C- > E to break down, equipment A and equipment E
It will detect the link down warning information on protection link A- > C- > path E, and the warning information is passed through on netconf
Offer controller.
Controller controls the topological structure and resource of the whole network and makes an immediate response after discovery protection link A- > C- > E failure,
The link failure disappearance alarm that equipment reports is not received within a preset time, then judges that link for faulty link, passes through at this time
The link flow table configuration of OpenFlow agreement and netconf agreement to hair band Diagnosis of Links mechanism under equipment, equipment is according to the chain
The specific creation process ginseng of road flow table configuration creation protection link A- > D- > E with Diagnosis of Links mechanism, protection link A- > D- > E
See above-mentioned business basic configuration step.
As shown in Figure 6 and Figure 7, for equipment A, when protecting link A- > C- > E to occur disconnected fine, equipment A detects the event
Barrier, since business also operates in active link at this time, so not needing to execute pretection switch at this time.When protecting the failure of link
Between more than one threshold value FailTime (user can configure FailTime according to the actual situation) when, controller is then planned simultaneously again
Protection link A- > D- > E with Diagnosis of Links mechanism is created, protection link A- > D- > E flow table and group table information are issued simultaneously
To equipment E, corresponding Tag switching rule is configured on equipment D.
When it is implemented, as shown in fig. 7, specific embodiment of the invention controller receives the first alarm letter that equipment reports
Breath determines that disconnected fibre occurs for the first link, comprising: after controller receives the first warning information that equipment reports, start timer,
Record protection link A- > C- > E fault time；If controller is not received by the timing (FailTime) of timer
The warning information that the link failure that equipment is sent disappears, it is determined that disconnected fibre occurs for protection link A- > C- > E.By the step, if
Link A- > C- > E fault recovery within the set time is protected, then controller is not necessarily to hair band Diagnosis of Links mechanism under equipment
The configuration of link flow table, does not need to create new protection link, can save the configuration of resource.
Controller in Fig. 7 creates the creation in the new protection link with OAM, refers to that controller determines new protection chain
The flow table on road configures, and flow table configuration is sent to equipment, and equipment executes corresponding movement according to flow table parameter, completes final
Creation.
The specific embodiment of the invention by protection link A- > D- > E on Diagnosis of Links mechanism judgement protection link A- > D- >
Whether E can be used, and when protecting link A- > D- > E available, to the first feedback information of controller report, it is anti-that controller receives first
After feedforward information, sends and instruct for the flow table of replacement to equipment A and equipment E, equipment A and equipment E are respectively according to the stream received
Table instruction modification multiprotocol label switching rapid failure protection group table (mpls fast failover group), with protection link
A- > D- > E replacement protection link A- > C- > E.
When protecting link A- > D- > E unavailable, to the second warning information of controller report, controller is again under equipment
The link flow table of hair band Diagnosis of Links mechanism configures, and equipment re-creates band Diagnosis of Links mechanism after receiving the configuration of link flow table
Protection link A- > D- > E, be greater than preset time (TryMax) until time for re-creating, then unsuccessfully returned to user feedback
Terminate after error code, is can be avoided into the endless loop for constantly searching new route in this way, be more than when the newly-built time of trial
When TryMax, controller is no longer attempt to newly-built protection link, it is believed that network environment is poor at this time, needs to carry out necessary artificial dry
In advance.
Specifically, specific embodiment of the invention equipment A and equipment E is quick according to flow table instruction modification multiprotocol label switching
Fail safe group table, comprising: by the Protection path tag modification in multiprotocol label switching rapid failure protection group table be directed toward
Protect link A- > D- > E group table.
When it is implemented, as shown in figure 8, modifying mpls fast failover group's on equipment A and equipment E
Protector path bucket is directed toward newly-established protection link A- > D- > E group table, such as the dotted arrow position institute in figure
Show.Fig. 8 shows the distribution situation of flow table in final equipment and group table, the block diagram in figure in dotted line frame refers to the group table in equipment,
It is partially flow table and physical port, and each block diagram is all the standard component in openflow, each module is completed certain
Function, the combination of multiple modules realize that the configuration of a business, such as vlan this module are responsible for carrying out client traffic stream
It extracts, the business based on vlan can be configured and extracted, mpls l22vpn.
Specifically, the specific embodiment of the invention removes protection link A- > C- > E, comprising: firstly, control equipment deletes protection
Diagnosis of Links mechanism on link A- > C- > E；Then, control equipment deletes flow table and group table on protection link A- > C- > E.
When it is implemented, as shown in figure 9, the specific embodiment of the invention removes protection link A- > C- > E, comprising: terminating
Direction from controller to equipment A and equipment E issue creation business terminate relevant flow table (including VLAN Table,
Termination MAC Table and MPLS Flow Table), top half flow table is newly-established flow table, dotted line frame in figure
In be original flow table and group table, create flow table and use tunnel id identical with original flow table, annunciator A and equipment E are
To the replacement operation of former flow table.
When it is implemented, as shown in figure 9, when extract and termination direction it is new flow table creation after the completion of, by equipment A and equipment
Original old flow table is set to aging immediately by E, and establish one can periodic wakeup task, in the specific embodiment of the invention
Period can use 1 second (s), periodically update flow table state and execute burnin operation.When detecting the stream of aging, to
Controller sends event notification information, and deletes local original old flow table, realizes the recycling of the resources such as label.
In this way, the specific embodiment of the invention ensure that any moment all has two paths, the reliability of network ensure that.
Embodiment two:
The first link in the specific embodiment of the invention two is active link.
As shown in Figure 10, active link A- > B- > E be the specific embodiment of the invention the first link, active link A- > D- >
E is the second link of specific embodiment of the invention equipment creation, after active link A- > B- > E breaks down, equipment A and equipment
E can detect the link down warning information on active link A- > B- > path E, and the warning information is passed through netconf
It is reported to controller, while business can be immediately switched to protection link A- > C- > E, and path switching state is passed through netconf
Be reported to controller, controller redistributes resource, to equipment under hair band Diagnosis of Links mechanism link flow table configuration, equipment root
One new active link A- > D- > E of creation is configured according to the link flow table, later, controller controls the work that equipment deletes failure
Link A- > B- > E discharges related resource.
As shown in Figure 10 and Figure 11, for equipment A, when active link A- > B- > E occurs disconnected fine, equipment A detects this
Failure, equipment receive the link switchover information that controller is sent, and the MPLS Fast Failover group table in equipment can be by business
Stream, which is swung to, goes out equipment A by the group surface low that protector group bucket is directed toward.It is more than one when the fault time of active link
When a threshold value FailTime (user can configure FailTime according to the actual situation), controller is then planned again and creates band chain
Active link A- > D- > E of road diagnosis mechanism, and active link A- > D- > E flow table and group table information are issued to equipment simultaneously
E configures corresponding Tag switching rule on equipment D.
Specifically, as shown in figure 11, specific embodiment of the invention controller receives the first warning information that equipment reports,
Determine that disconnected fibre occurs for the first link, comprising:
After controller receives the first warning information that equipment reports, start timer, record active link A- > B- > E event
Downtime；
Timer time and active link A- > B- > E-state are checked, if active link A- > B- > E fault time is greater than in advance
If the time (FailTime), then controller determines that current ink failure is serious, needs to establish new active link.That is active link
A- > B- > E restores normal in preset time (FailTime), then directly terminates, otherwise, controller creation band Diagnosis of Links machine
Active link A- > D- > E of system.
The creation in new active link of the controller creation with OAM in Figure 11, refers to that controller determines new work
The flow table of link configures, and flow table configuration is sent to equipment, and equipment executes corresponding movement according to flow table parameter, completes most
Whole creation.
Specifically, specific embodiment of the invention equipment A and equipment E is according to the flow table instruction modification multiprotocol label received
Rapid failure protection group table is exchanged, replaces active link A- > B- > E with active link A- > D- > E.It specifically includes: by multi-protocols mark
Operating path tag modification in label exchange rapid failure protection group table is to be directed toward active link A- > D- > E group table.It is specific real
Shi Shi modifies the worker path of mpls fast failover group as shown in figure 12 on equipment A and equipment E
Bucket is directed toward newly-established active link A- > D- > E group table, as shown in the dotted arrow position in figure.
Specifically, the specific embodiment of the invention removes active link A- > B- > E, comprising: firstly, control equipment deletes work
Diagnosis of Links mechanism on link A- > B- > E；Then, control equipment deletes flow table and group table on active link A- > B- > E.
When it is implemented, as shown in figure 13, the specific embodiment of the invention removes active link A- > B- > E, comprising: is terminating
Direction from controller to equipment A and equipment E issue creation business terminate relevant flow table (including VLAN Table,
Termination MAC Table and MPLS Flow Table), top half flow table is newly-established flow table, dotted line frame in figure
In be original flow table and group table, create flow table and use tunnel id identical with original flow table, annunciator A and equipment E are
To the replacement operation of former flow table.
When it is implemented, as shown in figure 13, after the completion of the flow table extracted and termination direction is new creates, by equipment A and setting
Original old flow table is set to aging immediately by standby E, and establish one can periodic wakeup task, periodically update flow table shape
State simultaneously executes burnin operation.When detecting the stream of aging, event notification information is sent to controller, and is deleted local original
Old flow table realizes the recycling of the resources such as label.
In this way, the specific embodiment of the invention ensure that any moment all has two paths, the reliability of network ensure that.
Therefore, the specific embodiment of the invention is based in traditional PTN, IPRAN network in 1:1 linear protection technical foundation
SDN framework realizes " permanent protection " scheme in a kind of SDN network, in office by the coordinated of SDN equipment and controller
When carve and all guarantee that business has two work, protection paths, ensure that service disconnection caused by path failure to greatest extent, this
Also advantage of the SDN network compared with traditional network is embodied.
Compared to traditional protection technique, " permanent protection " scheme obtains the reliability of the networks such as traditional PTN, IPRAN
Greatly promoted.Meanwhile under SDN framework, controller is moved on in the complex control plane that needs to operate in equipment originally, greatly
The degree that simplifies that the device is complicated greatly, optimizes the performance of equipment, while also further improving stabilization of equipment performance.
As shown in figure 14, the specific embodiment of the invention additionally provides a kind of controller, which includes:
Network state determining module 141, the first warning information reported for receiving the equipment in the network determine
Disconnected fibre occurs for one link；Wherein, it is reported when the first warning information equipment detects first link down
Information；
Link establishment control module 142, for the link flow table configuration to hair band Diagnosis of Links mechanism under the equipment, directly
The second alarm that the equipment is sent is received to the first feedback information for receiving the equipment transmission or after preset time
Information；First feedback information is to report after the equipment creates the second link according to the link flow table configuration received
The available information of the second link is determined to the controller, and by the controller；Second warning information is institute
It states after equipment creates the second link according to the link flow table configuration received and is reported to the controller, and by the control
Device determines the not available information of the second link；
Link removes control module 143, after receiving first feedback information, sends and refers to for the flow table of replacement
It enables, the flow table instruction replaces first link for controlling the equipment second link, removes first chain
Road and second link is added in the former protection group on the current device.
Specifically, the first link of the specific embodiment of the invention is the protection link or active link in network；When the first chain
When road is protection link, the second link is new protection link of the equipment according to the link flow table configuration creation received；When
When one link is active link, the second link is new active link of the equipment according to the link flow table configuration creation received.
Specifically, if the first link of the specific embodiment of the invention is active link, network state determining module 141 is being received
After the first warning information that equipment in the network reports, before determining that disconnected fibre occurs for the first link, it is also used to send chain
Road switch messages give the equipment, control the equipment for current business and switch to protection link.
Specifically, specific embodiment of the invention link removes control module 143 and is specifically used for, and sends the flow table for replacement
Instruction controls the Diagnosis of Links mechanism for first chain road that the equipment is deleted on current device, and sets described in control
The standby flow table for deleting first chain road on current device and group table.
Specifically, specific embodiment of the invention network state determining module 141 is specifically used for, and receives equipment reports
After one warning information, start timer, recorded for the first link failure time；If not received in the timing of timer
The warning information that the link failure sent to equipment disappears, it is determined that disconnected fibre occurs for the first link.
As shown in figure 15, the specific embodiment of the invention additionally provides a kind of equipment, which includes:
Warning information reporting module 151, issues warning information when for detecting the first link down, and by the alarm
Information reporting is to controller；
Link establishment module 152, the link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller,
The second link of creation is configured according to the link flow table, and to first feedback information of controller report or the second warning information；
First feedback information is reported to institute after creating the second link according to the link flow table configuration received for the equipment
Controller is stated, and the available information of the second link is determined by the controller；；Second warning information is described sets
It is reported to the controller after standby configuration the second link of creation according to the link flow table received, and true by the controller
Make the not available information of the second link；
Link replacement module 153, the flow table instruction for replacement sent for receiving the controller, according to the stream
Table instruction replaces first link with second link, removes first link, and second link is added
Into in the former protection group on the current device；The flow table instruction is to send out after the controller receives first feedback information
The instruction sent.
Specifically, if the specific embodiment of the invention first link is active link, warning information reporting module is being incited somebody to action
Warning information is reported to after controller, the link flow with Diagnosis of Links mechanism that link establishment module is issued in reception controller
Before table configuration, warning information reporting module is also used to receive the link switchover information of controller transmission, according to the link switchover
Current business is switched to protection link by information.
Specifically, specific embodiment of the invention link replacement module is specifically used for according to flow table instruction modification multiprotocol label
Exchange rapid failure protection group table；When the first link is protection link, multiprotocol label switching rapid failure protection group is modified
Table, comprising: the Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to the second link
Group table；When the first link is active link, modify multiprotocol label switching rapid failure protection group table, comprising: will assist more
Operating path bucket in the view quick ineffective group table of Tag switching is modified to point to the group table of the second link.
Specifically, specific embodiment of the invention link replacement module 152 is specifically used for, and the flow table of the first chain road is set to
Aging immediately, and establish one can periodic wakeup task, periodically update flow table state simultaneously execute burnin operation, work as inspection
When having measured aging stream, the removal of first link is completed, and sends event notification information to controller.
As shown in figure 16, the specific embodiment of the invention additionally provides a kind of network protection systems, if including controller 161 and
Do equipment 162 connected to the controller；
It is disconnected to determine that the first link occurs for controller 161, the first warning information reported for receiving the equipment in the network
It is fine；Wherein, first warning information is that the equipment detects the information reported when first link down；And
For the link flow table configuration to hair band Diagnosis of Links mechanism under the equipment, sent until receiving the equipment
The first feedback information or the second warning information that the equipment is sent is received after preset time；First feedback information
It is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by described
Controller determines the available information of the second link；Second warning information is that the equipment is according to what is received
It is reported to the controller after link flow table configuration the second link of creation, and second link is determined not by the controller
Available information；And
After receiving first feedback information, the flow table instruction for replacement is sent, the flow table instruction is used for
The equipment is controlled with second link to replace first link, remove first link and by second chain
Road is added in the former protection group on the current device；
Equipment 162 issues warning information, and the warning information is reported to control when for detecting the first link down
Device processed；And
The link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller, matches according to the link flow table
The second link of creation is set, and to first feedback information of controller report or the second warning information；First feedback information
It is reported to the controller after creating the second link according to the link flow table configuration received for the equipment, and by described
Controller determines the available information of the second link；；Second warning information is the equipment according to the institute received
It is reported to the controller after stating link flow table configuration the second link of creation, and second link is determined by the controller
Not available information；And
The flow table instruction for replacement sent for receiving the controller, instructs according to the flow table with described second
Link replaces first link, removes first link, and second link is added on the current device
In former protection group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
In conclusion the specific embodiment of the invention provides a kind of network protection method, comprising: controller receives in network
The first warning information that equipment reports determines that disconnected fibre occurs for the first link；Wherein, the first warning information is that equipment detects first
The information reported when link down；Link flow table configuration of the controller to hair band Diagnosis of Links mechanism under equipment, until receiving
The first feedback information or the second warning information that equipment is sent is received after preset time that equipment is sent；First feedback information
It is reported to controller after creating the second link according to the link flow table configuration received for equipment, and determines second by controller
The available information of link；Second warning information is to be reported to after equipment creates the second link according to the link flow table configuration received
Controller, and the not available information of the second link is determined by controller；After controller receives the first feedback information, sends and use
In replacement flow table instruct, flow table instruction for control equipment with the second link replace the first link, removal the first link and
Second link is added in the former protection group on the current device.Specific embodiment of the invention controller is determining the first link
Occur it is disconnected fine after, to equipment under hair band Diagnosis of Links mechanism the configuration of link flow table, equipment matches according to the link flow table received
The second link of creation is set, after controller receives the first feedback information, sends the flow table instruction for replacement, flow table instruction is used for
Control equipment replaces the first link with the second link, removes the first link and the second link is added on the current device
Former protection group in, such specific embodiment of the invention ensure that any moment all has two paths, be able to solve existing skill
The problem of art service disconnection, improves the reliability of network.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (21)
1. a kind of network protection method, which is characterized in that the described method includes:
The first warning information that the equipment that controller receives in the network reports determines that disconnected fibre occurs for the first link；Wherein, institute
Stating the first warning information is that the equipment detects the information reported when first link down；
Link flow table configuration of the controller to hair band Diagnosis of Links mechanism under the equipment, until receiving the equipment transmission
First feedback information receives the second warning information that the equipment is sent after preset time；First feedback information is
The equipment is reported to the controller after creating the second link according to the link flow table configuration received, and by the control
Device processed determines the available information of the second link；Second warning information is the equipment according to the chain received
It is reported to the controller after road flow table configuration the second link of creation, and determines that second link can not by the controller
Information；
After controller receives first feedback information, the flow table instruction for replacement is sent, the flow table instruction is for controlling
The equipment is made with second link to replace first link, remove first link and by second link
It is added in the former protection group on the current device.
2. the method according to claim 1, wherein first link be the network in protection link or
Active link；
When first link is protection link, second link is the equipment according to the link flow table received
Configure the new protection link of creation；
When first link is active link, second link is the equipment according to the link flow table received
Configure the new active link of creation.
3. according to the method described in claim 2, it is characterized in that, if first link is active link, the controller
After receiving the first warning information that the equipment in the network reports, before disconnected fibre occurs for first link of determination, the party
Method further include:
The controller transmission link switch messages give the equipment, control the equipment for current business and switch to protection chain
Road.
4. the method according to claim 1, wherein described remove first link, comprising:
Control the Diagnosis of Links mechanism for first chain road that the equipment is deleted on current device；
Control the flow table and group table of first chain road that the equipment is deleted on current device.
5. the method according to claim 1, wherein what the equipment that the controller receives in the network reported
First warning information determines that disconnected fibre occurs for the first link, comprising:
After controller receives the first warning information that the equipment reports, starts timer, record first link failure
Time；
If the controller is not received by the link failure that the equipment is sent and disappears in the timing of the timer
Warning information, it is determined that disconnected fibre occurs for the first link.
6. a kind of network protection method, which is characterized in that the described method includes:
Equipment in network issues warning information when detecting the first link down, and the warning information is reported to control
Device；
Equipment receives the link flow table configuration with Diagnosis of Links mechanism that the controller issues, and is configured and is created according to the link flow table
Build the second link, and to first feedback information of controller report or the second warning information；First feedback information is institute
It states after equipment creates the second link according to the link flow table configuration received and is reported to the controller, and by the control
Device determines the available information of the second link；Second warning information is the equipment according to the link received
It is reported to the controller after flow table configuration the second link of creation, and determines that second link is unavailable by the controller
Information；
Equipment receives the flow table instruction for replacement that the controller is sent, and instructs second link according to the flow table
It replaces first link, remove first link, and second link is added to the former guarantor on the current device
In shield group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
7. according to the method described in claim 6, it is characterized in that, first link be the network in protection link or
Active link；
When first link is protection link, second link is the equipment according to the link flow table received
Configure the new protection link of creation；
When first link is active link, second link is the equipment according to the link flow table received
Configure the new active link of creation.
8. the method according to the description of claim 7 is characterized in that if first link is active link, it is described will be described
Warning information is reported to after controller, and equipment receives the link flow table configuration with Diagnosis of Links mechanism that the controller issues
Before, this method further include:
The equipment receives the link switchover information that controller is sent, and current business is switched to guarantor according to the link switchover information
Protect link.
9. according to the method described in claim 6, it is characterized in that, described instructed according to the flow table is replaced with second link
Change first link, comprising: according to the flow table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is protection link, the modification multiprotocol label switching rapid failure protection group table, comprising:
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, comprising:
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table.
10. according to the method described in claim 6, it is characterized in that, described remove first link, comprising:
The flow table of first chain road is set to aging immediately by the equipment, and establish one can periodic wakeup task,
It periodically updates flow table state and executes burnin operation, when the equipment has detected aging stream, complete first link
Removal, and send event notification information to the controller.
11. a kind of network protection controller, which is characterized in that the controller includes:
Network state determining module, the first warning information reported for receiving the equipment in the network, determines the first link
Disconnected fibre occurs；Wherein, first warning information is that the equipment detects the information reported when first link down；
Link establishment control module, for the link flow table configuration to hair band Diagnosis of Links mechanism under the equipment, until receiving
The second warning information that the equipment is sent is received to the first feedback information of equipment transmission or after preset time；Institute
Stating the first feedback information is that the equipment is according to being reported to after link flow table configuration the second link of creation received
Controller, and the available information of the second link is determined by the controller；Second warning information is the equipment
It is reported to the controller after creating the second link according to the link flow table configuration received, and is determined by the controller
The not available information of second link out；
Link removes control module, after receiving first feedback information, sends the flow table instruction for replacement, described
Flow table instruction for control the equipment with second link replace first link, removal first link and
Second link is added in the former protection group on the current device.
12. controller according to claim 11, which is characterized in that first link is the protection chain in the network
Road or active link；
When first link is protection link, second link is the equipment according to the link flow table received
Configure the new protection link of creation；
When first link is active link, second link is the equipment according to the link flow table received
Configure the new active link of creation.
13. controller according to claim 12, which is characterized in that if first link is active link, the net
It is disconnected to determine that the first link occurs after the first warning information that the equipment received in the network reports for network state determining module
Before fibre, transmission link switch messages are also used to the equipment, the equipment is controlled by current business and switches to protection link.
14. controller according to claim 11, which is characterized in that the link removes control module and is specifically used for, and sends out
The flow table instruction for replacement is sent, the Diagnosis of Links machine for first chain road that the equipment is deleted on current device is controlled
System, and the control equipment delete the flow table and group table of first chain road on current device.
15. controller according to claim 11, which is characterized in that the network state determining module is specifically used for, and connects
After receiving the first warning information that the equipment reports, starts timer, record the first link failure time；If described
In the timing of timer, it is not received by the warning information that the link failure that the equipment is sent disappears, it is determined that first
Disconnected fibre occurs for link.
16. a kind of network protection device, which is characterized in that the equipment includes:
Warning information reporting module issues warning information when for detecting the first link down, and will be on the warning information
Offer controller；
Link establishment module, the link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller, according to this
Link flow table configuration the second link of creation, and to first feedback information of controller report or the second warning information；Described
One feedback information is to be reported to the control after the equipment creates the second link according to the link flow table configuration received
Device, and the available information of the second link is determined by the controller；Second warning information be the equipment according to
It is reported to the controller after link flow table configuration the second link of creation received, and institute is determined by the controller
State the not available information of the second link；
Link replacement module, the flow table instruction for replacement sent for receiving the controller, instructs according to the flow table
First link is replaced with second link, removes first link, and second link is added to and is deserved
In former protection group in preceding equipment；The flow table instruction is that the controller receives the finger sent after first feedback information
It enables.
17. equipment according to claim 16, which is characterized in that first link is the protection link in the network
Or active link；
When first link is protection link, second link is the equipment according to the link flow table received
Configure the new protection link of creation；
When first link is active link, second link is the equipment according to the link flow table received
Configure the new active link of creation.
18. equipment according to claim 17, which is characterized in that if first link is active link, the alarm
For information reporting module after the warning information is reported to controller, the link establishment module is receiving the controller
Before the link flow table configuration with Diagnosis of Links mechanism issued, the warning information reporting module is also used to receive controller hair
Current business is switched to protection link according to the link switchover information by the link switchover information sent.
19. equipment according to claim 16, which is characterized in that the link replacement module is specifically used for according to the stream
Table instruction modification multiprotocol label switching rapid failure protection group table；
When first link is protection link, the modification multiprotocol label switching rapid failure protection group table, comprising:
Protection path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table；
When first link is active link, the modification multiprotocol label switching rapid failure protection group table, comprising:
Operating path bucket in multiprotocol label switching rapid failure protection group table is modified to point to second link
Group table.
20. equipment according to claim 16, which is characterized in that the link replacement module is specifically used for, by described
The flow table of one chain road is set to aging immediately, and establish one can periodic wakeup task, periodically update flow table state
And execute burnin operation, when having detected aging stream, complete the removal of first link, and send event notification information to
The controller.
21. a kind of network protection systems, which is characterized in that including controller and several equipment being connect with the controller；
It is disconnected to determine that the first link occurs for the controller, the first warning information reported for receiving the equipment in the network
It is fine；Wherein, first warning information is that the equipment detects the information reported when first link down；And
For the link flow table configuration to hair band Diagnosis of Links mechanism under the equipment, until receive that the equipment sends the
One feedback information receives the second warning information that the equipment is sent after preset time；First feedback information is institute
It states after equipment creates the second link according to the link flow table configuration received and is reported to the controller, and by the control
Device determines the available information of the second link；Second warning information is the equipment according to the link received
It is reported to the controller after flow table configuration the second link of creation, and determines that second link is unavailable by the controller
Information；And
After receiving first feedback information, the flow table instruction for replacement is sent, the flow table instruction is for controlling
The equipment replaces first link with second link, removes first link and add second link
It adds in the former protection group on the current device；
The equipment issues warning information, and the warning information is reported to control when for detecting the first link down
Device；And
The link flow table configuration with Diagnosis of Links mechanism issued for receiving the controller, configures according to the link flow table and creates
Build the second link, and to first feedback information of controller report or the second warning information；First feedback information is institute
It states after equipment creates the second link according to the link flow table configuration received and is reported to the controller, and by the control
Device determines the available information of the second link；Second warning information is the equipment according to the link received
It is reported to the controller after flow table configuration the second link of creation, and determines that second link is unavailable by the controller
Information；And
The flow table instruction for replacement sent for receiving the controller, instructs second link according to the flow table
It replaces first link, remove first link, and second link is added to the former guarantor on the current device
In shield group；The flow table instruction is that the controller receives the instruction sent after first feedback information.
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| CN107682342B (en) * | 2017-10-17 | 2020-03-10 | 盛科网络（苏州）有限公司 | Method and system for DDoS (distributed denial of service) flow traction based on openflow |
| CN109921987B (en) * | 2017-12-13 | 2022-01-21 | 中兴通讯股份有限公司 | BIER-TE network detection method, device and system |
| CN110113258B (en) * | 2019-04-23 | 2024-03-26 | 北京全路通信信号研究设计院集团有限公司 | Method and system for automatically protecting data surface link by using control surface link |
| CN110430131B (en) * | 2019-07-25 | 2021-12-24 | 新华三技术有限公司合肥分公司 | Message forwarding method and device |
| CN113285871B (en) * | 2020-02-19 | 2022-08-12 | 中国电信股份有限公司 | Link protection method, SDN controller and communication network system |
| CN112532532B (en) * | 2020-11-16 | 2022-08-12 | 烽火通信科技股份有限公司 | Service returning method, device, equipment and readable storage medium |
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| CN102739308A (en) * | 2012-06-12 | 2012-10-17 | 中兴通讯股份有限公司 | Recovery method for protection service in intelligent optical network |
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| CN102739308A (en) * | 2012-06-12 | 2012-10-17 | 中兴通讯股份有限公司 | Recovery method for protection service in intelligent optical network |
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