CN104486218B - A kind of MPLS network control system and method based on SDN - Google Patents
A kind of MPLS network control system and method based on SDN Download PDFInfo
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Abstract
A kind of MPLS network control system and method based on SDN.MPLS network control system based on SDN includes：SDN controllers, for issuing IP forward tables, Label Forwarding Information Base and flow table to interchanger, flow table includes being used for according to purpose IP Match IPs message and according to tag match tape label message；Interchanger includes border TSR and LSR；Border TSR is used to receive IP forward tables, Label Forwarding Information Base and flow table, and according to flow table handle received packet；LSR is used to receive Label Forwarding Information Base and flow table, and according to flow table handle received packet.Technical scheme can make full use of the link circuit resource of the whole network to accomplish more preferable network traffics optimization.
Description
Technical field
The present invention relates to a kind of computer networking technology, more particularly to a kind of MPLS network control system based on SDN
And method.
Background technology
Currently, data center's flow is broadly divided into two types, north-south flow and East and West direction flow.North-south is with user
Access based on data center's content, East and West direction flow includes：Data center's cloud resource pond is (in same data center or across in data
The heart) synchronous, backup, CDN (Content Delivery Network, content distributing network) flow push etc..For above-mentioned
All kinds of flows, it is less at present to use traffic engineering mechanism, cause inside data center or link utilization is imitated between data center
The problem of rate is not high, major embodiment is both ways：For synchronous, backup flow, in most cases these flows link band
Wide utilization rate is very low, causes network bandwidth resources to waste.For pushing flow, because its flow is concentrated mainly on access busy,
Usual crest ratio is relatively concentrated.To ensure peak flow transmission bandwidth, link bandwidth can only design according to peak value, cause link
Percentage bandwidth utilization rate in the case of normal discharge is very low, exacerbates network bandwidth resources waste.
Multiprotocol label switching (MPLS, Multi-Protocol Label Switching) is that one kind is used for rapid data
The system of MESSAGE EXCHANGE and route, it provides the abilities such as target, routing address, forwarding and exchange for network traffic data.But
It is difficult to perceive link bandwidth utilization rate to be caused due to the MPLS distributed AC servo systems used, is collected, analysis the whole network flow distribution situation.
Therefore, although existing MPLS network can improve the utilization rate of network bandwidth resources, but still there is very big network bandwidth
The improvement space of resource utilization.
How in consideration of it, using MPLS network the utilization rate of network bandwidth resources is further improved just into art technology
Personnel's urgent problem to be solved.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide a kind of MPLS network based on SDN
Control system and method, for solving the problems, such as the utilization rate of network bandwidth resources in the prior art up for further improving.
In order to achieve the above objects and other related objects, the present invention provides a kind of MPLS network control system based on SDN,
The MPLS network control system based on SDN includes：SDN controllers, for issuing IP forward tables, label forwarding to interchanger
Table and flow table, the flow table include being used for according to purpose IP Match IPs message and according to tag match tape label message；When
When according to purpose IP, the match is successful, the IP Message processings operation of execution includes：The IP forward tables are inquired about to obtain gateway and go out
Label information, and forward the IP messages；When according to tag match success, the tape label Message processing operation of execution includes：
Inquire about the Label Forwarding Information Base and obtain exit port and outgoing label information, and forward the tape label message；The interchanger bag
Include border TSR and LSR；The border TSR is used to receive the IP forward tables, mark
Forward table and flow table are signed, and according to the flow table handle received packet, the border TSR
Processing includes the IP messages for entering the MPLS network being converted into tape label message and will leave the band of the MPLS network
Label packet is converted into IP messages；The LSR is used to receive the Label Forwarding Information Base and flow table, and according to
The flow table received packet is handled, and the processing of the LSR includes carrying out tape label message
Forwarding.
Alternatively, SDN controllers establish label forwarding passage according to the flow distribution situation of the whole network, and the label is turned
Passage is converted into the IP forward tables to hair, Label Forwarding Information Base is handed down to the interchanger.
Alternatively, the label forwarding passage includes a plurality of, and every label forwarding passage is according to different link bands
Wide situation distributes different weights；IP forward tables that the label forwarding passage is converted into, Label Forwarding Information Base possess basis
The function that weight is forwarded.
Alternatively, the IP forward tables are secondary index table；Wherein, the one-level IP forward tables include purpose IP, mask,
Secondary table call number；Two level IP forward tables include gateway, outgoing label and next call number；The IP Message processings behaviour of the execution
The specific implementation of work includes：After the IP messages match one-level IP forward tables, secondary table call number is obtained, then according to
Secondary table call number obtains gateway and outgoing label and next call number in two level IP forward tables；Next call number will return
Write the secondary table call number of one-level IP forward tables.
Alternatively, the Label Forwarding Information Base is secondary index table；Wherein, the one-level Label Forwarding Information Base include inbound port,
Enter label, secondary table call number；Two level Label Forwarding Information Base includes exit port, outgoing label and next call number；The execution
The specific implementation of tape label Message processing operation includes：After tape label message matches one-level Label Forwarding Information Base, secondary table is obtained
Call number, exit port and outgoing label and next rope are then obtained in two level Label Forwarding Information Base according to the secondary table call number
Quotation marks；Next call number will be written back to the secondary table call number of one-level Label Forwarding Information Base.
The present invention provides a kind of MPLS network control method based on SDN, the MPLS network control method based on SDN
Including：SDN controllers issue IP forward tables, Label Forwarding Information Base and flow table to interchanger, and the flow table includes being used for according to mesh
IP Match IPs message and according to tag match tape label message；When according to purpose IP, the match is successful, the IP messages of execution
Processing operation includes：Inquire about the IP forward tables and obtain gateway and outgoing label information, and forward the IP messages；When according to mark
When the match is successful, the tape label Message processing operation of execution includes label：The Label Forwarding Information Base is inquired about to obtain exit port and go out
Label information, and forward the tape label message；The interchanger includes border TSR and LSR；
The border TSR receives IP forward tables, Label Forwarding Information Base and the flow table, and the LSR receives
The Label Forwarding Information Base and flow table；The interchanger according to the flow table handle received packet, wherein, institute
Stating the processing of border TSR includes the IP messages for entering the MPLS network being converted into tape label message and will be from
The tape label message for opening the MPLS network is converted into IP messages；The processing of the LSR is included tape label report
Text is forwarded.
Alternatively, SDN controllers establish label forwarding passage according to the flow distribution situation of the whole network, and the label is turned
Passage is converted into the IP forward tables to hair, Label Forwarding Information Base is handed down to the interchanger.
Alternatively, the label forwarding passage includes a plurality of, and every label forwarding passage is according to different link bands
Wide situation distributes different weights；IP forward tables that the label forwarding passage is converted into, Label Forwarding Information Base possess basis
The function that weight is forwarded.
Alternatively, the IP forward tables are secondary index table；Wherein, the one-level IP forward tables include purpose IP, mask,
Secondary table call number；Two level IP forward tables include gateway, outgoing label and next call number；The IP Message processings behaviour of the execution
The specific implementation of work includes：After the IP messages match one-level IP forward tables, secondary table call number is obtained, then according to
Secondary table call number obtains gateway and outgoing label and next call number in two level IP forward tables；Next call number will return
Write the secondary table call number of one-level IP forward tables.
Alternatively, the Label Forwarding Information Base is secondary index table；Wherein, the one-level Label Forwarding Information Base include inbound port,
Enter label, secondary table call number；Two level Label Forwarding Information Base includes exit port, outgoing label and next call number；The execution
The specific implementation of tape label Message processing operation includes：After tape label message matches one-level Label Forwarding Information Base, secondary table is obtained
Call number, exit port and outgoing label and next rope are then obtained in two level Label Forwarding Information Base according to the secondary table call number
Quotation marks；Next call number will be written back to the secondary table call number of one-level Label Forwarding Information Base.
As described above, a kind of the MPLS network control system and method based on SDN of the present invention, have below beneficial to effect
Fruit：Flow table has been expanded based on SDN, the concentrated controling management of SDN controllers is easy to collect and survey the whole network flow distribution situation, according to
SDN controllers can more accurately establish a plurality of label forwarding passage (LSP), and enter the reasonable tune of downlink traffic according to weight
Degree, the flow table forwarding of the link flow based on weight is realized in the case of multilink, the link circuit resource of the whole network can be made full use of
Accomplish more preferable network traffics optimization.
Brief description of the drawings
Fig. 1 is shown as a kind of module diagram of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 2 is shown as a kind of structural representation of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 3 is shown as a kind of structural representation of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 4 is shown as a kind of structural representation of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 5 is shown as a kind of structural representation of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 6 is shown as a kind of functional schematic of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 7 is shown as a kind of functional schematic of an embodiment of MPLS network control system based on SDN of the present invention.
Fig. 8 is shown as a kind of schematic flow sheet of an embodiment of MPLS network control method based on SDN of the present invention.
Fig. 9 is shown as a kind of schematic flow sheet of an embodiment of MPLS network control method based on SDN of the present invention.
Figure 10 is shown as a kind of schematic flow sheet of an embodiment of MPLS network control method based on SDN of the present invention.
Figure 11 is shown as a kind of schematic flow sheet of an embodiment of MPLS network control method based on SDN of the present invention.
Figure 12 is shown as a kind of schematic flow sheet of an embodiment of MPLS network control method based on SDN of the present invention.
Component label instructions
The 1 MPLS network control system based on SDN
11 SDN controllers
12 border TSRs
13 LSRs
S1~S3 steps
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through specific realities different in addition
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
It should be noted that the diagram provided in the present embodiment only illustrates the basic conception of the present invention in a schematic way,
Then the component relevant with the present invention is only shown in schema rather than is painted according to component count, shape and the size during actual implement
System, kenel, quantity and the ratio of each component can be a kind of random change during its actual implementation, and its assembly layout kenel also may be used
Can be increasingly complex.
The present invention provides a kind of MPLS network control system based on SDN.SDN (Software Defined Network,
Software defined network) be a kind of new network of Emulex network innovation framework, its core technology OpenFlow by by network equipment chain of command with
Data surface separates, it is achieved thereby that the flexible control of network traffics.Border TSR is properly termed as LER, and mark is handed over
Change router and be properly termed as LSR.In one embodiment, as shown in figure 1, the MPLS network control system 1 based on SDN is wrapped
Include SDN controllers 11, border TSR 12 and LSR 13.Wherein：
SDN controllers 11, for issuing IP forward tables, Label Forwarding Information Base and flow table to interchanger, the flow table includes
For according to purpose IP Match IPs message and according to tag match tape label message；When according to purpose IP, the match is successful, hold
Capable IP Message processings operation includes：Inquire about the IP forward tables and obtain gateway and outgoing label information, and forward the IP to report
Text；When according to tag match success, the tape label Message processing operation of execution includes：The Label Forwarding Information Base is inquired about to obtain out
Port and outgoing label information, and forward the tape label message；The interchanger includes border TSR 12 and mark
Remember TSR 13.In one embodiment, need to increase by two types, OFPAT_ inside original flow table instruction set
LOOKUP_FIB and OFPAT_LOOKUP_LFIB.New instruction type OFPAT_LOOKUP_FIB forwards the IP of matching
Table, instruction type OFPAT_LOOKUP_LFIB will match the Label Forwarding Information Base.In one embodiment, SDN controllers 11
Establish label forwarding passage according to the flow distribution situation of the whole network, and by the label forwarding passage be converted into the IP forward tables,
Label Forwarding Information Base is handed down to the interchanger.In one embodiment, the label forwarding passage includes a plurality of, every mark
Sign forwarding channel and different weights is distributed according to different link bandwidth situations；The IP that the label forwarding passage is converted into
Forward table, Label Forwarding Information Base possess the function of being forwarded according to weight.In one embodiment, as shown in Fig. 2 being shown in figure
The structure of MPLS network control system 1 based on SDN distinguishes the label forwarding passage that situation establishes according to the flow of the whole network.
By the MPLS label distributed in advance, a plurality of label forwarding passage (LSP, alternatively referred to as tag changeable path are established for message
Footpath), and the rational management of link flow is realized by the flow table of extension, so as to effectively utilize link bandwidth resource.At another
In embodiment, as shown in Figure 3, it is shown that packet message turns in the label of the structure of MPLS network control system 1 based on SDN
Send out the forwarding of passage.Source A to terminal B has two static LSP.Wherein LSP A weight is that 3, LSP B weight is 2.Point
Group 1 to 5 will undertake identical Business Stream (having identical source IP address and purpose IP address, carrying identical type of service).
Packet 1,3,5 will walk LSP A, and packet 2,4 will walk LSP B.
In one embodiment, SDN controllers 1 will be responsible for static LSP (packet of identical source and destination can use difference
The a plurality of LSP of weight) establish process, MPLS label distribution will use local binding mode, SDN controllers 1 according to user's request,
Distribute rational LSP and corresponding weight.If LER handles IP packet messages, controller is needed according to purpose IP in message
Address, writes the matching field of flow table, and action is set as OFPAT_LOOKUP_FIB.Two level IP forwarding concordance lists will be according to purpose
IP, mask, LSP weight, gateway and outgoing label are statically configured and issued.If LSP weight is n, then two
Also there must be n bars same gateway and the entry of outgoing label in level IP forward tables.If LER or LSR processing labeled packet reports
Text, controller need according to outer layer label in message, to write the matching field of flow table, and action is set as OFPAT_LOOKUP_
LFIB.Two level label forwarding concordance list will enter label, LSP weight according to inbound port, and exit port and outgoing label are carried out statically
Configure and issue.If LSP weight is n, then also there must be the identical exit port of n bars in two level Label Forwarding Information Base and goes out
The entry of label.
The border TSR 12 is used to receive IP forward tables, Label Forwarding Information Base and the flow table, and according to institute
State flow table handle received packet, the processing of the border TSR includes that the MPLS network will be entered
IP messages be converted into tape label message and the tape label message for leaving the MPLS network be converted into IP messages.At one
In embodiment, the IP forward tables are secondary index table, i.e. two level IP forwarding concordance lists, include one-level IP forward tables and two level IP
Forward table；Wherein, the one-level IP forward tables include purpose IP, mask, secondary table call number；Two level IP forward tables include net
Pass, outgoing label and next call number；The specific implementation of the IP Message processings operation of the execution includes：When the IP messages
After one-level IP forward tables, secondary table call number is obtained, is then obtained according to the secondary table call number in two level IP forward tables
Obtain gateway and outgoing label and next call number；Next call number will be written back to the two level table index of one-level IP forward tables
Number.In one embodiment, as shown in figure 4, the one-level IP forward tables contain purpose IP, mask, two level IP forward tables
Index, the two level IP forward tables contain the index of gateway, outgoing label and next list item.When without label IP messages matching one-level
After IP forward tables, two level IP forwarding table indexs are obtained, gateway is then obtained in two level IP forward tables according to this index and gone out
The index of label and next list item.The index of last next list item will be written back to the index word of the secondary table of one-level IP forward tables
Section.After next identical IP messages matching one-level IP forward tables, the index of next list item of two level IP forward tables will be obtained, from
And realize the MPLS traffic engineerings of Weight.
The LSR 13 is used to receive the Label Forwarding Information Base and flow table, and is carried out according to the flow table
Received packet is handled, the processing of the LSR includes being forwarded tape label message.At one
In embodiment, the Label Forwarding Information Base is secondary index table, i.e. two level label forwarding concordance list, comprising one-level Label Forwarding Information Base and
Two level Label Forwarding Information Base；Wherein, the one-level Label Forwarding Information Base includes inbound port, enters label, secondary table call number；Two level label
Forward table includes exit port, outgoing label and next call number；The specific implementation of the tape label Message processing operation of the execution
Including：After tape label message matches one-level Label Forwarding Information Base, secondary table call number is obtained, then according to the two level table index
Exit port and outgoing label and next call number are obtained number in two level Label Forwarding Information Base；Next call number will be written back to one
The secondary table call number of level Label Forwarding Information Base.In one embodiment, as shown in figure 5, the one-level Label Forwarding Information Base contains
Inbound port, enter label, the index of two level Label Forwarding Information Base.The two level Label Forwarding Information Base contains exit port, outgoing label (including
Label act) and next list item index.After tape label message matches one-level Label Forwarding Information Base, two level table index is obtained,
Then exit port and the index of outgoing label and next list item are obtained in two level Label Forwarding Information Base according to this index.It is last next
The index of list item will be written back to the index field of the secondary table of one-level Label Forwarding Information Base.When next same packets message matches one-level
After Label Forwarding Information Base, the index of next list item of secondary table will be obtained, so as to realize the MPLS traffic engineerings of Weight.
In one embodiment, as shown in fig. 6, the border of the MPLS network control system 1 based on SDN exchanges
The processing of router 12 and the LSR 13 to message is as schemed.Inside mpls domain, all data messages
Label is all carried, so LSR (LSR 13) need to only retain two level Label Forwarding Information Base (LFIB), (border exchanges LER
Router 12) need to handle IP messages as boundary marker TSR, so being also required to retain two level IP on forwarding plane
Forward table.In one embodiment, as shown in fig. 7, processing bag of the MPLS network control system 1 based on SDN to message
Include：IP is grouped corresponding label is obtained by the processing of flow table and IP secondary index tables in LER (border TSR 12)
Packet message.The labeled packet message passes through the flow table and mark in LSR (LSR 13) inside MPLS network
The processing for signing secondary index table carries out the forwarding of labeled packet message.The labeled packet message passes through at MPLS network edge
The processing of LER (border TSR 12) flow tables and label secondary index table obtains corresponding IP packet messages and forwarded.
The present invention provides a kind of MPLS network control method based on SDN, as shown in figure 8, the MPLS nets based on SDN
Network control method includes：
Step S1, SDN controller issues IP forward tables, Label Forwarding Information Base and flow table to interchanger, and the flow table includes
For according to purpose IP Match IPs message and according to tag match tape label message；When according to purpose IP, the match is successful, hold
Capable IP Message processings operation includes：Inquire about the IP forward tables and obtain gateway and outgoing label information, and forward the IP to report
Text；When according to tag match success, the tape label Message processing operation of execution includes：The Label Forwarding Information Base is inquired about to obtain out
Port and outgoing label information, and forward the tape label message；The interchanger includes border TSR and mark
TSR.
In one embodiment, need to increase by two types, OFPAT_LOOKUP_ inside original flow table instruction set
FIB and OFPAT_LOOKUP_LFIB.New instruction type OFPAT_LOOKUP_FIB is by the IP forward tables of matching, instruction
Type OFPAT_LOOKUP_LFIB will match the Label Forwarding Information Base.In one embodiment, SDN controllers 11 are according to the whole network
Flow distribution situation establish label forwarding passage, and the label forwarding passage is converted into the IP forward tables, label turns
Deliver and be handed down to the interchanger.In one embodiment, the label forwarding passage includes a plurality of, every label forwarding
Passage distributes different weights according to different link bandwidth situations；The IP forwardings that the label forwarding passage is converted into
Table, Label Forwarding Information Base possess the function of being forwarded according to weight.In one embodiment, SDN controllers 1 will be responsible for static state
LSP (packet of identical source and destination can use a plurality of LSP of different weights) establishes process, and MPLS label distribution will use this
Ground binding mode, SDN controllers 1 distribute rational LSP and corresponding weight according to user's request.If IP points of LER processing
Group message, controller need according to purpose IP address in message, to write the matching field of flow table, and action is set as OFPAT_
LOOKUP_FIB.Two level IP forwardings concordance list will be carried out statically according to purpose IP, mask, LSP weight, gateway and outgoing label
Configure and issue.If LSP weight is n, then also there must be n bars same gateway and outgoing label in two level IP forward tables
Entry.If LER or LSR processing labeled packet messages, controller are needed according to outer layer label in message, flow table is write
Matching field, action are set as OFPAT_LOOKUP_LFIB.Two level label forwarding concordance list will enter label according to inbound port,
LSP weight, exit port and outgoing label are statically configured and issued.If LSP weight is n, then in two level label
Also there must be the identical exit port of n bars and the entry of outgoing label in forward table.
Step S2, the border TSR is used to receive IP forward tables, Label Forwarding Information Base and the flow table, described
LSR is used to receive the Label Forwarding Information Base and flow table.
Step S3, the interchanger according to the flow table handle received packet, wherein, the border is handed over
Changing the processing of router includes the IP messages for entering the MPLS network being converted into tape label message and will leave described
The tape label message of MPLS network is converted into IP messages；The processing of the LSR includes carrying out tape label message
Forwarding.Specifically, IP is grouped and phase is obtained by the processing of flow table and IP secondary index tables in LER (border TSR 12)
The labeled packet message answered.The labeled packet message is inside MPLS network by LSR (LSR 13)
The processing of flow table and label secondary index table carries out the forwarding of labeled packet message.The labeled packet message is on MPLS network side
Edge obtains corresponding IP packet messages by the processing of LER (border TSR 12) flow tables and label secondary index table and turned
Hair.In one embodiment, the IP forward tables are secondary index table, i.e. two level IP forwarding concordance lists, are forwarded comprising one-level IP
Table and two level IP forward tables；Wherein, the one-level IP forward tables include purpose IP, mask, secondary table call number；Two level IP is forwarded
Table includes gateway, outgoing label and next call number；The specific implementation of the IP Message processings operation of the execution includes：When described
After IP messages matching one-level IP forward tables, secondary table call number is obtained, is then turned according to the secondary table call number in two level IP
Deliver middle acquisition gateway and outgoing label and next call number；Next call number will be written back to the two level of one-level IP forward tables
Table index number.In one embodiment, the one-level IP forward tables contain purpose IP, mask, the index of two level IP forward tables,
The two level IP forward tables contain the index of gateway, outgoing label and next list item.Turn when without label IP messages matching one-level IP
After delivering, two level IP forwarding table indexs are obtained, gateway and outgoing label are then obtained in two level IP forward tables according to this index
And the index of next list item.The index of last next list item will be written back to the index field of the secondary table of one-level IP forward tables.
After next identical IP messages matching one-level IP forward tables, the index of next list item of two level IP forward tables will be obtained, so as to
Realize the MPLS traffic engineerings of Weight.
In one embodiment, the Label Forwarding Information Base is secondary index table, i.e. two level label forwarding concordance list, includes one
Level Label Forwarding Information Base and two level Label Forwarding Information Base；Wherein, the one-level Label Forwarding Information Base includes inbound port, enters label, secondary table
Call number；Two level Label Forwarding Information Base includes exit port, outgoing label and next call number；The tape label Message processing of the execution
The specific implementation of operation includes：After tape label message matches one-level Label Forwarding Information Base, secondary table call number is obtained, then basis
The secondary table call number obtains exit port and outgoing label and next call number in two level Label Forwarding Information Base；Next rope
Quotation marks will be written back to the secondary table call number of one-level Label Forwarding Information Base.In one embodiment, the one-level Label Forwarding Information Base bag
Contain inbound port, enter label, the index of two level Label Forwarding Information Base.The two level Label Forwarding Information Base contains exit port, outgoing label
(including label action) and the index of next list item.After tape label message matches one-level Label Forwarding Information Base, secondary table is obtained
Index, exit port and the index of outgoing label and next list item are then obtained in two level Label Forwarding Information Base according to this index.Most
The index of next list item will be written back to the index field of the secondary table of one-level Label Forwarding Information Base afterwards.When next same packets message
After one-level Label Forwarding Information Base, the index of next list item of secondary table will be obtained, so as to realize the MPLS flow works of Weight
Journey.
In one embodiment, as shown in figure 9, the MPLS network control method based on SDN includes：Controller is analyzed
The flow difference situation of the whole network, generation multilink LSP (Weight)；Controller is according to LSP, when receiving first packet message
Issue flow table (assigning new element type OFPAT_LOOKUP_FIB and OFPAT_LOOKUP_LFIB) and secondary index table；Handing over
On changing planes, IP messages will match flow table, perform and search FIB actions；On switches, label packet will match flow table, and execution is looked into
LFIB is looked for act.
In one embodiment, as shown in Figure 10, the MPLS network control method based on SDN includes：LER is received
Packet message, judge whether the packet message is IP packet messages, if the packet message is not for IP packet messages,
Based on outer layer label, flow table is inquired about；When being matched in flow table, action " OFPAT_LOOKUP_LFIB " inquiry two level mark is performed
Label forwarding concordance list, obtains exit port and outgoing label information is forwarded.If can not be matched in flow table, by the packet
Message is sent to the processing of SDN controllers.If the packet message is for IP packet messages, based on purpose IP, flow table is inquired about；
When being matched in flow table, action " OFPAT_LOOKUP_FIB " inquiry two level IP forwarding concordance lists are performed, gateway is obtained and goes out
Label information is forwarded.If can not be matched in flow table, the packet message is sent to the processing of SDN controllers.
In one embodiment, as shown in figure 11, the MPLS network control method based on SDN includes：LSR is received
Packet message, judge whether the packet message is labeled packet message, if the packet message is for labeled packet message,
Outer layer label is then based on, inquires about flow table；When being matched in flow table, action " OFPAT_LOOKUP_LFIB " inquiry two level is performed
Label forwarding concordance list, obtains exit port and outgoing label information is forwarded., will be described point if can not be matched in flow table
Group message is sent to the processing of SDN controllers.If the packet message is not labeled packet message, the packet report is abandoned
Text.
In one embodiment, as shown in figure 12, the MPLS network control method based on SDN includes：When packet is reported
When text does not match interchanger flow table, SDN controllers are sent to handle the packet message, whether controller judges packet message type
For IP packet messages, if the packet message is not IP packet messages, write according to the outer layer label of the packet message
Flow table, according to inbound port, enter label, LSP weight, exit port and outgoing label write-in two level label forwarding concordance list.If institute
It is IP packet messages to state packet message, then SDN controllers judge to forward the switch type of the packet message, if the friendship
Type of changing planes is LER, then flow table is write according to the purpose IP of the packet message, according to purpose IP, mask, LSP weight, net
Close and outgoing label write-in two level IP forwards concordance list.If the switch type is not LER, the packet message is abandoned.
The execution sequence of the step of MPLS network control method based on SDN of the present invention is not limited to above-described embodiment institute
Description, as long as including above-mentioned steps i.e. within technical scheme.
In summary, a kind of MPLS network control system and method based on SDN of the invention, have below beneficial to effect
Fruit：Flow table has been expanded based on SDN, the concentrated controling management of SDN controllers is easy to collect and survey the whole network flow distribution situation, according to
SDN controllers can more accurately establish a plurality of label forwarding passage (LSP), and enter the reasonable tune of downlink traffic according to weight
Degree, the flow table forwarding of the link flow based on weight is realized in the case of multilink, the link circuit resource of the whole network can be made full use of
Accomplish more preferable network traffics optimization.So the present invention effectively overcomes various shortcoming of the prior art and has high industrial
Value.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
- A kind of 1. MPLS network control system based on SDN, it is characterised in that the MPLS network control system based on SDN Including：SDN controllers, for issuing IP forward tables, Label Forwarding Information Base and flow table to interchanger, the flow table is used for according to mesh IP Match IPs message and according to tag match tape label message；When according to purpose IP, the match is successful, the IP messages of execution Processing operation includes：Inquire about the IP forward tables and obtain gateway and outgoing label information, and forward the IP messages；When according to mark When the match is successful, the tape label Message processing operation of execution includes label：The Label Forwarding Information Base is inquired about to obtain exit port and go out Label information, and forward the tape label message；The interchanger includes border TSR and LSR；The border TSR is used to receive IP forward tables, Label Forwarding Information Base and the flow table, and according to the flow table Received packet is handled, the processing of the border TSR includes turning the IP messages for entering the MPLS network Change tape label message into and the tape label message for leaving the MPLS network is converted into IP messages；The LSR is used to receive the Label Forwarding Information Base and flow table, and according to the flow table to receiving report Text is handled, and the processing of the LSR includes being forwarded tape label message.
- 2. the MPLS network control system according to claim 1 based on SDN, it is characterised in that：SDN controllers are according to complete The flow distribution situation of net establishes label forwarding passage, and the label forwarding passage is converted into the IP forward tables, label Forward table is handed down to the interchanger.
- 3. the MPLS network control system according to claim 2 based on SDN, it is characterised in that：The label forwarding is led to Including a plurality of, every label forwarding passage distributes different weights according to different link bandwidth situations in road；The label IP forward tables that forwarding channel is converted into, Label Forwarding Information Base possess the function of being forwarded according to weight.
- 4. the MPLS network control system according to claim 1 based on SDN, it is characterised in that：The IP forward tables are Secondary index table；Wherein, one-level IP forward tables include purpose IP, mask, secondary table call number；Two level IP forward tables include net Pass, outgoing label and next call number；The specific implementation of the IP Message processings operation of the execution includes：When the IP messages After one-level IP forward tables, secondary table call number is obtained, is then obtained according to the secondary table call number in two level IP forward tables Obtain gateway and outgoing label and next call number；Next call number will be written back to the two level table index of one-level IP forward tables Number.
- 5. the MPLS network control system according to claim 1 based on SDN, it is characterised in that：The Label Forwarding Information Base For secondary index table；Wherein, one-level Label Forwarding Information Base includes inbound port, enters label, secondary table call number；Two level Label Forwarding Information Base Including exit port, outgoing label and next call number；The specific implementation of the tape label Message processing operation of the execution includes：When After tape label message matching one-level Label Forwarding Information Base, secondary table call number is obtained, then according to the secondary table call number two Exit port and outgoing label and next call number are obtained in level Label Forwarding Information Base；Next call number will be written back to one-level label The secondary table call number of forward table.
- A kind of 6. MPLS network control method based on SDN, it is characterised in that：The MPLS network control method based on SDN Including：SDN controllers issue IP forward tables, Label Forwarding Information Base and flow table to interchanger, and the flow table is used for according to purpose IP With IP messages and according to tag match tape label message；When according to purpose IP, the match is successful, the IP Message processings behaviour of execution Work includes：Inquire about the IP forward tables and obtain gateway and outgoing label information, and forward the IP messages；When according to tag match During success, the tape label Message processing operation of execution includes：Inquire about the Label Forwarding Information Base and obtain exit port and outgoing label letter Breath, and forward the tape label message；The interchanger includes border TSR and LSR；The border TSR receives IP forward tables, Label Forwarding Information Base and the flow table, the LSR Receive the Label Forwarding Information Base and flow table；The interchanger is handled received packet according to the flow table, wherein, the processing of the border TSR Including the IP messages for entering the MPLS network are converted into tape label message and the tape label of the MPLS network will be left Message is converted into IP messages；The processing of the LSR includes being forwarded tape label message.
- A kind of 7. MPLS network control method based on SDN according to claim 6, it is characterised in that：SDN controller roots Establish label forwarding passage according to the flow distribution situation of the whole network, and by the label forwarding passage be converted into the IP forward tables, Label Forwarding Information Base is handed down to the interchanger.
- A kind of 8. MPLS network control method based on SDN according to claim 7, it is characterised in that：The label turns Passage is sent out including a plurality of, every label forwarding passage distributes different weights according to different link bandwidth situations；It is described IP forward tables that label forwarding passage is converted into, Label Forwarding Information Base possess the function of being forwarded according to weight.
- A kind of 9. MPLS network control method based on SDN according to claim 6, it is characterised in that：The IP forwardings Table is secondary index table；Wherein, one-level IP forward tables include purpose IP, mask, secondary table call number；Two level IP forward tables include Gateway, outgoing label and next call number；The specific implementation of the IP Message processings operation of the execution includes：When the IP messages After matching one-level IP forward tables, secondary table call number is obtained, then according to the secondary table call number in two level IP forward tables Obtain gateway and outgoing label and next call number；Next call number will be written back to the two level table index of one-level IP forward tables Number.
- A kind of 10. MPLS network control method based on SDN according to claim 6, it is characterised in that：The label turns Deliver as secondary index table；Wherein, one-level Label Forwarding Information Base includes inbound port, enters label, secondary table call number；Two level label turns Deliver including exit port, outgoing label and next call number；The specific implementation bag of the tape label Message processing operation of the execution Include：After tape label message matches one-level Label Forwarding Information Base, secondary table call number is obtained, then according to the secondary table call number Exit port and outgoing label and next call number are obtained in two level Label Forwarding Information Base；Next call number will be written back to one-level The secondary table call number of Label Forwarding Information Base.
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| CN201410781729.7A CN104486218B (en) | 2014-12-16 | 2014-12-16 | A kind of MPLS network control system and method based on SDN |
| PCT/CN2015/089496 WO2016095574A1 (en) | 2014-12-16 | 2015-09-14 | Sdn-based mpls network control system and method |
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| CN104486218B (en) * | 2014-12-16 | 2017-12-22 | 上海斐讯数据通信技术有限公司 | A kind of MPLS network control system and method based on SDN |
| CN104901890B (en) * | 2015-06-24 | 2018-01-02 | 上海斐讯数据通信技术有限公司 | A kind of SDN route generation, matching process and system |
| CN105187307B (en) * | 2015-08-19 | 2018-07-31 | 上海斐讯数据通信技术有限公司 | MAC-in-MAC message transmitting methods based on SDN and system |
| CN105450447B (en) * | 2015-11-17 | 2018-05-18 | 上海斐讯数据通信技术有限公司 | A kind of network system and network operation method |
| CN106789658B (en) * | 2016-12-29 | 2019-09-27 | 南京邮电大学 | Satellite MPLS network flow equalization method based on SDN controller |
| CN106936705B (en) * | 2017-03-06 | 2020-06-02 | 重庆邮电大学 | Software defined network routing method |
| CN109981753B (en) * | 2019-03-07 | 2021-04-27 | 中南大学 | Software-defined edge computing system and resource allocation method for Internet of things |
| CN110891020B (en) * | 2019-12-24 | 2021-07-13 | 中国电子科技集团公司第五十四研究所 | Flow table quantity optimization method of SDN in-band control network |
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| CN100550823C (en) * | 2003-12-26 | 2009-10-14 | 上海贝尔阿尔卡特股份有限公司 | A kind of Ethernet transfer equipment and method with quick protection and fair characteristic |
| CN100490421C (en) * | 2004-10-20 | 2009-05-20 | 华为技术有限公司 | Method for realizing flow equitable transmission in MPLS looped network |
| CN100596102C (en) * | 2006-09-29 | 2010-03-24 | 中国电信股份有限公司 | Method for establishing label switched path of minimized path preemption cost |
| CN102271079B (en) * | 2010-06-04 | 2014-11-05 | 华为技术有限公司 | Message forwarding method, node and system |
| CN103095583B (en) * | 2012-11-09 | 2016-03-16 | 盛科网络（苏州）有限公司 | The method and system of Openflow two-stage stream table are realized by chip loopback |
| FI20126275L (en) * | 2012-12-07 | 2014-06-08 | Tellabs Oy | Method and apparatus for configuring a programmatically defined network |
| CN103973568B (en) * | 2013-02-05 | 2017-03-08 | 上海贝尔股份有限公司 | For the method and apparatus for forwarding SDN stream on the net in MPLS core |
| EP2838231B1 (en) * | 2013-05-15 | 2017-02-01 | NTT DoCoMo, Inc. | Network system and access controller and method for operating the network system |
| CN104486218B (en) * | 2014-12-16 | 2017-12-22 | 上海斐讯数据通信技术有限公司 | A kind of MPLS network control system and method based on SDN |
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