CN108337111A - Obtain the method and device of network node topology - Google Patents
Obtain the method and device of network node topology Download PDFInfo
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- CN108337111A CN108337111A CN201810010649.XA CN201810010649A CN108337111A CN 108337111 A CN108337111 A CN 108337111A CN 201810010649 A CN201810010649 A CN 201810010649A CN 108337111 A CN108337111 A CN 108337111A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
Abstract
This disclosure relates to a kind of method and device obtaining network node topology.The method includes：Agreement LLDP messages are found by first port receives link layer；LLDP messages are parsed to obtain the neighbor state information of first port；When changing according to the neighbours of neighbor state information monitoring to first port, the neighbor state information after first port variation is recorded, and by first message to the neighbor state information after first port variation described in controller report.Interchanger is by the neighbor state information of LLDP agreement learning physics port, and when monitoring neighbours' variation, interchanger notices the neighbor state information of port by first message to controller in time.Therefore, controller no longer needs timing receipt LLDP messages and ARP messages to safeguard the physical couplings of the network equipment, reduces the protocol interaction of signalling path between controller and interchanger, improves the operational efficiency of whole network.
Description
Technical field
This disclosure relates to field of communication technology more particularly to a kind of method and device obtaining network node topology.
Background technology
SDN (Software Defined Network, software defined network) is a kind of new network of Emulex network innovation framework, SDN
Core concept be to detach the control plane of the network equipment with forwarding plane, to realize flexible control to network flow, be
The innovation of core network and application provides good platform.
It is established and is connected by OpenFlow agreements between controller and interchanger in SDN network, (opened using Openflow
Release) signalling path of the agreement as control plane and forwarding plane, that is, the friendship by Openflow agreements completion signaling
Mutually, for example, controller is configured and managed interchanger by the signalling path.Controller needs to safeguard the whole topology of network,
Default stream table is issued on interchanger, interchanger passes through text of delivering newspaper in the flow table.
Controller (transmits messages) message by interchanger transmission LLDP (Link Layer Discovery using packetout
Protocol, Link Layer Discovery Protocol) message, after LLDP messages are sent out by interchanger, peer switches will receive LLDP reports
Text, the LLDP message up sending controllers that peer switches will be received by packetin (receiving) messages.Controller passes through
Equipment and port information in LLDP messages calculate the physical connection between two interchangers.
When user's void machine accesses network, ARP messages are actively sent, interchanger receives ARP messages and reported by packetin
For text by the ARP message up sending received to controller, the INFORMATION DISCOVERY void machine that controller is carried by ARP messages is linked into exchange
Machine.
When SDN network is larger, the cpu resource that controller must be costly maintains the connection between all-network node
Relationship, for example, when the link between network node changes, on the one hand controller will update the link state, on the one hand
The path in a large amount of network is updated, needs to consume very big resource.
Invention content
In view of this, the present disclosure proposes a kind of method and device obtaining network node topology, controller no longer needs
Timing sends packetout messages, sends the detection that LLDP messages carry out network topology actively to trigger interchanger, also no longer needs
The packetin messages that timing receipt is encapsulated based on LLDP messages or ARP messages are wanted to safeguard that the physical connection of the network equipment is closed
System, reduces the protocol interaction of signalling path between controller and switch device, saves the resource of controller, improve whole
The operational efficiency of a network.
According to the disclosure in a first aspect, providing a kind of method obtaining network node topology, the method is applied to
Interchanger in software defined network SDN, the method includes：
Agreement LLDP messages are found by first port receives link layer；
LLDP messages are parsed to obtain the neighbor state information of first port；
When being changed according to the neighbours of neighbor state information monitoring to first port, after recording the first port variation
Neighbor state information, and by first message to described in controller report first port variation after neighbor state information.
In one possible implementation, the method further includes：
The second message that controller is sent is received, second message includes first port mark and reports enabled identification field；
If second message reports enabled identification field to meet preset condition, it is logical that setting first port identifies corresponding port
Cross neighbor state information of the first message to the controller report port.
In one possible implementation, the method further includes：
The third message that controller is sent is received, third message includes second port mark；
Second port is identified into the neighbor state information reporting of corresponding port to controller by the 4th message.
According to the second aspect of the disclosure, a kind of method obtaining network node topology is provided, the method is applied to
Controller in SDN, the method includes：
The first message that desampler is sent, the first message includes the neighbor state of the interchanger first port
Information；
First message is parsed to obtain and preserve neighbor state information.
In one possible implementation, the method further includes：
Second message is sent to interchanger, second message includes first port mark and reports enabled identification field, so that
Interchanger reports the corresponding port of enabled identification field setting first port mark should to controller report according to second message
The mode of the neighbor state information of port.
In one possible implementation, described that enabled identification field is reported to meet preset condition.
In one possible implementation, the method further includes：
Third message is sent to interchanger, third message includes second port mark, so that interchanger is receiving third
Identify the neighbor state information of corresponding port after message to controller report second port by the 4th message.
In one possible implementation, the neighbor state information includes the physics for the equipment being connect with first port
Address, IP address, exit port and device type.
In one possible implementation, second message is port modifications message Port Modification
Message。
In one possible implementation, first message is port status message Port Status Message, described
The experiment Experimenter fields of Port Status Message carry neighbor state information.
According to the third aspect of the disclosure, a kind of device obtaining network node topology is provided, described device is applied to
Interchanger in software defined network SDN, described device include：
First receiving module, for finding agreement LLDP messages by first port receives link layer；
First parsing module, for parsing LLDP messages to obtain the neighbor state information of first port；
First reporting module, for when changing according to the neighbours of neighbor state information monitoring to first port, recording institute
State first port variation after neighbor state information, and by first message to described in controller report first port variation after
Neighbor state information.
According to the fourth aspect of the disclosure, a kind of device obtaining network node topology is provided, described device is applied to
Controller in SDN, described device include：
Second receiving module, for the first message that desampler is sent, the first message includes the interchanger
The neighbor state information of first port；
Second parsing module, for parsing first message to obtain and preserve neighbor state information.
According to the 5th of the disclosure the aspect, a kind of device obtaining network node topology is provided, described device includes：
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as executing described instruction and realizes that the disclosure first is any described to second aspect
Method.
According to another aspect of the present disclosure, a kind of non-volatile computer readable storage medium storing program for executing is provided, is stored thereon with
Computer program instructions realize the disclosure first to second aspect any institute when the computer program instructions are executed by processor
The method stated.
Interchanger monitors switch port connection by the neighbor state information of LLDP agreement learning physics port with this
Neighbours change.When monitoring neighbours' variation, interchanger notices the neighbor state of port by first message to controller in time
Information.Therefore, controller can obtain connection relation, user's void machine and access in SDN between switch device and exchange in time
Connection relation between machine need not periodically send packetout messages, and the progress of LLDP messages is sent actively to trigger interchanger
The detection of network topology, controller no longer need the packetin messages that timing receipt is encapsulated based on LLDP messages or ARP messages
It safeguards the physical couplings of the network equipment, reduces the protocol interaction of signalling path between controller and interchanger, promoted
The operational efficiency of whole network.According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, other spies of the disclosure
Sign and aspect will be apparent.
Description of the drawings
Including in the description and the attached drawing of a part for constitution instruction and specification together illustrate the disclosure
Exemplary embodiment, feature and aspect, and for explaining the principles of this disclosure.
Fig. 1 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 2 shows the schematic diagrames according to one illustrative LLDP messages of the disclosure.
Fig. 3 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 4 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 5 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 6 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 7 shows the application scenarios schematic diagram of the method for the acquisition network node topology according to one embodiment of the disclosure.
Fig. 8 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Fig. 9 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Figure 10 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Figure 11 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Figure 12 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Specific implementation mode
Various exemplary embodiments, feature and the aspect of the disclosure are described in detail below with reference to attached drawing.It is identical in attached drawing
Reference numeral indicate functionally the same or similar element.Although the various aspects of embodiment are shown in the accompanying drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the disclosure, numerous details is given in specific implementation mode below.
It will be appreciated by those skilled in the art that without certain details, the disclosure can equally be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight the purport of the disclosure.
Currently the connection relation collection mode of the network node of SDN is influenced very big by network size, and controller needs fixed
When trigger LLDP messages transmission, receive the packetin messages from interchanger to find and safeguard the chain between network node
Road；Controller also needs to the ARP messages of timing receipt void machine to find and maintain the presence of empty machine, needs consumption very big
Resource.
In order to solve the above-mentioned technical problem, present disclose provides it is a kind of obtain network node topology method and device,
Openflow interchangers are identified the device type of neighbours and are found in time by the neighbor information of LLDP agreement learning physics port
The user's void machine for accessing side notices the neighbor state information of port using Port Status Message to controller in time.Control
Device processed can be obtained in time between connection relation and user's void machine and access switch in network between switch device
Connection relation, controller no longer need timing to send packetout messages, and the progress of LLDP messages is sent actively to trigger interchanger
The detection of network topology also no longer needs the packetin messages that timing receipt is encapsulated based on LLDP messages or ARP messages to tie up
The physical couplings for protecting the network equipment, reduce the protocol interaction of signalling path between controller and switch device, save
The resource of controller, improves the operational efficiency of whole network.
Fig. 1 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.This method can be with
Applied to the interchanger in SDN, such as OF interchangers (i.e. Openflow interchangers), as shown in Figure 1, this method institute specific as follows
Show.
Step S11 has found agreement LLDP messages by first port receives link layer.
Above-mentioned first port can be the port of interchanger, and an interchanger may include one or more ports, exchange
Machine can send and receive message, such as LLDP messages by port.
In the SDN for supporting Openflow agreements, by taking Openflow interchangers as an example, it can be opened on the port of interchanger
LLDP protocol functions support LLDP agreements, interchanger that can send LLDP messages or reception to other interchangers by port
The LLDP messages that other interchangers are sent.If user's void machine supports LLDP agreements, can be sent to the interchanger in SDN
LLDP messages.
Fig. 2 shows the schematic diagrames according to one illustrative LLDP messages of the disclosure, as shown in Fig. 2, LLDP messages can be taken
Physical address chassis id, IP address, exit port mark port id with the equipment for sending the LLDP messages and equipment
Type etc..Wherein, physical address can be the address for the equipment identities that unique mark sends the LLDP messages, such as can be
The MAC Address of equipment；Exit port can be send the LLDP messages equipment port, i.e., with locally-attached neighbor device
Port；Device type can be interchanger or user's void machine etc., for example, the equipment class that the LLDP messages that interchanger is sent carry
The device type that type is interchanger, the LLDP messages of user's void machine transmission carry is user's void machine；IP address, device type use
The extended fields of LLDP messages carries.
Step S12, parsing LLDP messages are to obtain the neighbor state information of first port.
Wherein, neighbor state information include the physical address of the equipment for sending the LLDP messages, IP address, exit port with
And device type.
Interchanger can obtain LLDP messages and take after receiving LLDP messages according to LLDP protocol analysis LLDP messages
The neighbor state information of the first port of band.
Step S13 records the first port when changing according to the neighbours of neighbor state information monitoring to first port
Neighbor state information after variation, and believed to the neighbor state after first port variation described in controller report by first message
Breath.
Wherein, neighbours' variation of first port can refer to that the neighbor device of first port connection changes, for example, newly
At least one of it is found that a neighbours, is lost a neighbours, the neighbor port information of connection or neighbor state information letter
Breath changes.
In one possible implementation, interchanger can be recorded and preserved to neighbor state information, according to this
The neighbor state information of ground record, and the neighbor state information received can monitor that the neighbours of first port change.
For example, as described above, neighbor state information includes physical address, the IP of the neighbor device of first port connection
Address, exit port and device type etc., interchanger carry out parsing to LLDP messages after receiving LLDP messages and obtain neighbours
Status information, interchanger can locally search recorded neighbor state information, if identical record can be found,
Indicate that the neighbours of first port connection do not change, if physical address having the same can be found but exit port is different
Record, then can indicate first port connection neighbor port change, if not finding with same physical address
Record, then can indicate neighbours of the first port new discovery (connection) of interchanger, etc..
When monitoring that the neighbours of first port connection change, interchanger can record the neighbour after first port variation
Status information is occupied, to be updated to the neighbours that first port connects.For example, if interchanger monitors that first port newly connects
A neighbours have been met, new neighbor state information record can be created, the new neighbor of first port is recorded；If interchanger
It monitors that the neighbor port of first port connection changes, the exit port of the neighbours recorded originally can be updated,
It is updated to the exit port that the neighbor state information of above-mentioned first port includes, the original record of the neighbours can also be deleted, is created
New neighbor state information record, the disclosure are not construed as limiting this.
When monitoring that the neighbours of first port connection change, interchanger can also be to described in controller report first
Neighbor state information after the variation of port, the mode reported can pass through first message.
Wherein, first message can be port status message Port Status Message, in a kind of possible realization side
In formula, neighbor state information can be carried by the Experimenter fields of Port Status Message, it should
Experimenter fields are experimental fields as defined in Openflow agreements, can carry arbitrary private data.
Controller can pass through solution after the Port Status Message (first message) for receiving interchanger transmission
Analysis Port Status Message determine neighbor state information, for example, this can be parsed from Experimenter fields
The newest neighbor state information in port, the port connection of the neighbor state information update interchanger obtained according to parsing are set
Standby content.
Optionally, in the neighbours' variation for not monitoring first port, interchanger does not send first message then and reports first
The neighbor state information of port, the connection relation of the port of the interchanger will not change on controller.
Interchanger monitors switch port connection by the neighbor state information of LLDP agreement learning physics port with this
Neighbours change.When monitoring neighbours' variation, interchanger can notice the neighbours of port to controller in time by first message
Status information.Therefore, controller can obtain connection relation, user's void machine and access in SDN between switch device in time
Connection relation between interchanger need not periodically send packetout messages, and LLDP messages are sent actively to trigger interchanger
The detection for carrying out network topology, the packetin messages for also no longer needing timing receipt to be encapsulated based on LLDP messages or ARP messages
It safeguards the physical couplings of the network equipment, reduces the protocol interaction of signalling path between controller and interchanger, promoted
The operational efficiency of whole network.
It for example, can as described above, controller is after the Port Status Message for receiving interchanger transmission
To parse the newest neighbor state information of first port from Experimenter fields, according to the neighbor state of parsing acquisition
The equipment content of the first port connection of the information update interchanger.Therefore, each interchanger that controller can obtain it is every
The equipment and device type of a port connection obtain network node and open up to obtain the connection relation between the network equipment
It flutters.
Fig. 3 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.This method can be with
Applied to the interchanger in SDN, such as OF interchangers (i.e. Openflow interchangers), as shown in figure 3, the method can also wrap
Include following steps.
Step S14, receives the second message that controller is sent, and second message includes first port mark and reports enabled mark
Character learning section.
Step S15, if second message reports enabled identification field to meet preset condition, setting first port, which identifies, to be corresponded to
Port by first message to the neighbor state information of the controller report port.
Wherein, second message can be port modifications message Port Modification Message, Port
Modification Message include first port mark, and first port mark can refer to unique mark port identities
Information.For example, in order to allow interchanger that can report the neighbor state information of first port, controller according to the demand of controller
It can be by way of sending second message setting interchanger and reporting the neighbor state information of its first port.
In one possible implementation, second message may include reporting enabled identification field, report enabled mark
Field may include different status information, for example, may include first state and the second state, first state can indicate to set
Neighbor state information of the interchanger by first message to controller report first port is set, the second state can indicate that setting is handed over
It changes planes and reports the neighbor state information of first port by packetin messages.Arrangement above interchanger reports its first port
The mode of neighbor state information is only a kind of example, does not limit the disclosure in any way.
In one example, by taking Port Modification Message as an example, report enabled identification field that can be
Config fields in Port Modification Message, the OFPPC_PORT_NEIGHBOR_ in config fields
INFORM set can be first state, if OFPPC_PORT_NEIGHBOR_INFORM set, interchanger records the message
The corresponding port of port-mark of carrying reports enabled mark, once neighbours' variation of the follow-up port, interchanger will pass through
Port Status Message are by its neighbor state information reporting to controller.OFPPC_PORT_ in config fields
It can be the second state that NEIGHBOR_INFORM, which resets, if OFPPC_PORT_NEIGHBOR_INFORM resets, interchanger
Pass through packetin message up sending to controller when receiving LLDP messages.
For example：If OFPPC_PORT_NEIGHBOR_INFORM=1, interchanger will pass through Port Status
Message is by its neighbor state information reporting to controller；If OFPPC_PORT_NEIGHBOR_INFORM=0, interchanger
Pass through packetin message up sending to controller when receiving LLDP messages.
Above is only an example of the disclosure, does not limit the disclosure in any way.
In another example, it if controller does not send Port Modification Message to interchanger, exchanges
Machine acquiescence passes through packetin message up sending to controller when receiving LLDP messages.
Interchanger, can be according to the first port mark of second message carrying after the second message for receiving controller transmission
Know and determine corresponding first port, can also judge second message reports whether enabled identification field meets preset condition, example
Such as, report whether enabled identification field is first state.If second message report enabled identification field meet preset condition (on
It is first state that report, which enables identification field), interchanger can be arranged the corresponding port of first port mark and pass through Port Status
Neighbor state information of the Messages to the controller report port.
It, can be according to network in such a way that second message setting switch port reports the neighbor state information of the port
Actual demand be flexibly arranged obtain switch port neighbor state information mode, improve whole network operation effect
Rate.
Fig. 4 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.This method can be with
Applied to the interchanger in SDN, such as OF interchangers (i.e. Openflow interchangers), as shown in figure 4, the method can also wrap
Include following steps.
Step S16, receives the third message that controller is sent, and third message includes second port mark.
Second port is identified the neighbor state information reporting of corresponding port to control by step S17 by the 4th message
Device.
Wherein, third message can be Port Description Request (port description request) Multipart
Message, third message may include second port mark, and second port mark can refer to unique mark port identities
Information.4th message can be message corresponding with third message：(port describes back Port Description Reply
Answer) Multipart Message.
In order to enable the controller to the neighbor state information of some port of active obtaining interchanger, controller can be to exchange
Machine sends third message.After interchanger receives the third message of controller transmission, it may be determined that second port mark is corresponding
Second port, then should by the 4th message (for example, Port Description Reply Multipart Message)
The neighbor state information reporting of port is to controller.Specifically, interchanger is after determining second port, can locally search the
The neighbor state information of second port is passed through Port Description Reply by the neighbor state information of Two-port netwerk
Experimenter (experiment) field of Multipart Message is reported to controller.
In this way, controller can be set with the neighbor state information of active obtaining interchanger to obtain interchanger
Connection relation between standby, between interchanger and user's void machine, connection that can be much sooner between aware switch equipment become
Change and user void machine reaching the standard grade and migrating.
Optionally, above-mentioned first message, second message, third message and the 4th message can pass through controller and exchange
The signalling path based on Openflow agreements pre-established between machine sends and receives.
Fig. 5 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.This method can be with
Applied to the controller in SDN, as shown in figure 5, this approach includes the following steps.
Step S21, the first message that desampler is sent, the first message includes the interchanger first port
Neighbor state information.
Step S22, parsing first message is to obtain and preserve neighbor state information.
Wherein, neighbor state information include the equipment of corresponding with first message switch port connection physical address,
IP address, exit port and device type.
As described above, controller receive interchanger transmission Port Status Message (first message) after,
The neighbor state information that first port can be obtained by parsing Port Status Message, for example, can be from
The newest neighbor state information in the port is parsed in Experimenter fields.The neighbours that controller can be obtained according to parsing
The status information of the neighbor device of the port connection of the state information updating interchanger, for example, can update and preserve the friendship
It changes planes physical address, IP address, exit port and the device type of neighbor device etc. of port connection.
The equipment and device type that controller can be connected according to each port of each interchanger of acquisition, to obtain
The connection relation between the network equipment is taken, that is, obtains network node topology.
Controller can by the first message of desampler come build between interchanger, interchanger and user's void machine it
Between link connection relationship, controller need not periodically send packetout messages, and LLDP reports are sent actively to trigger interchanger
Text carries out the detection of network topology, and controller no longer needs timing receipt to be encapsulated based on LLDP messages or ARP messages
Packetin messages come maintain between interchanger, the link connection relationship of interchanger and user's void machine, can perceive much sooner
Connection variation and user void machine between interchanger reaching the standard grade and migrating.
Fig. 6 shows the flow chart of the method for the acquisition network node topology according to one embodiment of the disclosure.This method can be with
Applied to the controller in SDN, as shown in fig. 6, this method further includes：
Step S23 sends second message to interchanger, and second message includes first port mark and reports enabled identifier word
Section, so that interchanger reports enabled identification field setting first port to identify corresponding port to controller according to second message
Report the mode of the neighbor state information of the port.
Wherein, second message can be port modifications message Port Modification Message, Port
Modification Message include first port mark, and first port mark can refer to unique mark port identities
Information.For example, in order to allow interchanger that can report the neighbor state information of first port, controller according to the demand of controller
It can be by way of sending second message setting interchanger and reporting the neighbor state information of its first port.
In one possible implementation, second message may include reporting enabled identification field, report enabled mark
Field may include different status information, for example, may include first state and the second state, first state can indicate to set
Neighbor state information of the interchanger by first message to controller report first port is set, the second state can indicate that setting is handed over
It changes planes and reports the neighbor state information of first port by packetin messages.Arrangement above interchanger reports its first port
The mode of neighbor state information is only a kind of example, does not limit the disclosure in any way.
In one example, by taking Port Modification Message as an example, report enabled identification field that can be
Config fields in Port Modification Message, the OFPPC_PORT_NEIGHBOR_ in config fields
INFORM set can be first state, if OFPPC_PORT_NEIGHBOR_INFORM set, interchanger records the message
The corresponding port of port-mark of carrying reports enabled mark, once neighbours' variation of the follow-up port, interchanger will pass through
Port Status message is by its neighbor state information reporting to controller.OFPPC_PORT_ in config fields
It can be the second state that NEIGHBOR_INFORM, which resets, if OFPPC_PORT_NEIGHBOR_INFORM resets, interchanger
Pass through packetin message up sending to controller when receiving LLDP messages.
For example：If OFPPC_PORT_NEIGHBOR_INFORM=1, interchanger will pass through Port Status
Message is by its neighbor state information reporting to controller；If OFPPC_PORT_NEIGHBOR_INFORM=0, interchanger
Pass through packetin message up sending to controller when receiving LLDP messages.
Above is only an example of the disclosure, does not limit the disclosure in any way.
In another example, it if controller does not send Port Modification Message to interchanger, exchanges
Machine acquiescence passes through packetin message up sending to controller when receiving LLDP messages.
Interchanger, can be according to the first port mark of second message carrying after the second message for receiving controller transmission
Know and determine corresponding first port, can also judge second message reports whether enabled identification field meets preset condition, example
Such as, report whether enabled identification field is first state.If second message report enabled identification field meet preset condition (on
It is first state that report, which enables identification field), interchanger can be arranged the corresponding port of first port mark and pass through Port Status
Neighbor state information of the Messages to the controller report port.
Second message is sent to interchanger the neighbor state information that switch port reports the port is set by controller
Mode, the mode for the neighbor state information for obtaining switch port can be flexibly set according to the actual demand of network, promoted
The operational efficiency of whole network.
In one possible implementation, as shown in figure 5, this method can also include：
Step S24 sends third message to interchanger, and third message includes second port mark, so that interchanger is connecing
Receive the neighbor state information for identifying corresponding port after third message to controller report second port by the 4th message.
Step S24 can be executed before step S21, can also be later, the disclosure is not construed as limiting this.
Wherein, third message can be Port Description Request Multipart Message, and third disappears
Breath may include second port mark, and second port mark can be the information for referring to unique mark port identities.4th disappears
Breath can be message corresponding with third message：Port Description Reply Multipart Message.
In order to enable the controller to the neighbor state information of some port of active obtaining interchanger, controller can be to exchange
Machine sends third message.After interchanger receives the third message of controller transmission, it may be determined that second port mark is corresponding
Second port, then should by the 4th message (for example, Port Description Reply Multipart Message)
The neighbor state information reporting of port is to controller.Specifically, interchanger is after determining second port, can locally search the
The neighbor state information of second port is passed through Port Description Reply by the neighbor state information of Two-port netwerk
The Experimenter fields of Multipart Message are reported to controller.
In this way, controller can be set with the neighbor state information of active obtaining interchanger to obtain interchanger
Connection relation between standby, between interchanger and user's void machine, connection that can be much sooner between aware switch equipment become
Change and user void machine reaching the standard grade and migrating.
Optionally, above-mentioned first message, second message, third message and the 4th message can pass through controller and exchange
The signalling path based on Openflow agreements pre-established between machine sends and receives.
Using example
Fig. 7 shows the application scenarios schematic diagram of the method for the acquisition network node topology according to one embodiment of the disclosure.For
The method of the clearer acquisition network node topology for illustrating the disclosure, explains with reference to possible application scenarios
It is bright.
As shown in fig. 7, in Openflow networks, SW1, SW2, SW3, SW4 are Openflow interchangers, interchanger
Port on be switched on LLDP protocol functions, support LLDP agreements, VM10, VM20, VM30, VM40 are user's void machine, are used
Family void machine supports LLDP agreements, can send LLDP messages to the interchanger in SDN.SDN controllers pass through OpenFlow agreements
It establishes and connects with SW1, SW2, SW3, SW4, using Openflow (open flows) agreement as control between controller and interchanger
The signalling path of level and forwarding plane completes the interaction of signaling by Openflow agreements.
Controller can by issue Port Modification Message (second message) to interchanger SW1,
SW2, SW3, SW4, it is desirable that interchanger SW1, SW2, SW3, SW4 report institute by Port Status Message (first message)
There is the neighbor state information of port.For example, can be taken in message by issuing a message to an interchanger (for example, SW1)
With a plurality of Port Modification Message, the quantity for carrying Port Modification Message can be according to friendship
The quantity of port of changing planes determines that every Port Modification Message can carry different port-marks.
Wherein, in the config fields of Port Modification Message, OFPPC_PORT_NEIGHBOR_
INFORM set, the port-mark corresponding port that interchanger records message carrying report enabled mark, follow-up once hand over
The neighbours of the corresponding port of port-mark changed planes change, interchanger by by Port Status Message by the port
Neighbor state information reporting is to controller.
SW interchangers (including SW1, SW2, SW3, SW4) have reported local port information under initial situation, due to LLDP
Protocol negotiation is not yet completed, and port does not have neighbor state information.
LLDP messages are mutually sent after the completion of LLDP protocol negotiations still, between SW switch devices to send out into line link neighbours
Existing, LLDP messages may include physical address, IP address, exit port and the device type of equipment etc. for sending the message.
By taking SW1 as an example, when SW1 sends LLDP messages from port 4 to SW4, while the LLDP reports of SW4 are received from port 4
Wen Shi, the LLDP messages that parsing SW4 is sent can obtain the neighbor state information of port 4, including the physical address of SW4, IP
Location, port 1 and device type.SW1 learns the port 1 that SW4 is connected to port 4, and SW4 is Openflow interchangers.
SW1 has found that the neighbor state information of port 4 changes, and the neighbor state information after port 4 is changed passes through
Port Status Message are reported to controller, include in the Experimenter fields of Port Status Message
Physical address, IP address, port 1 and the device type (Openflow interchangers) of SW4.
SW1 can also record the neighbor state information of port 4, when receiving new LLDP messages by port 4, root
According to the port 4 for parsing new LLDP Receive messages neighbor state information and recorded port 4 neighbor state information into
Row compares, to judge that the neighbours of port 4 change.
Controller receives the Port Status for the 4 neighbor state information of port for including SW1 by signalling path
Message, the neighbor state information of parsing exit port 4 from Experimenter fields, including the physical address of SW4, IP
Location, port 1 and device type (Openflow interchangers), the neighbours that controller can preserve the port 4 of SW1 are SW4, SW4's
IP address, the port-for-port 1 of the SW1 of connection, and SW4 are Openflow interchangers.
Likewise, the port 1 of SW4 can also receive the LLDP messages that SW1 is sent from port 4, SW4 has found the neighbour of port 1
It occupies status information to change, it was found that the neighbor state information of port 1 is passed through Port Status by new neighbours
Message is reported to controller, and the neighbours that controller preserves the port 1 of SW4 are SW1, the IP address of SW1, the end of the SW4 of connection
Mouth is port 4, and SW1 is Openflow interchangers.
The neighbor state information of the port of other SW interchangers is also so to report, and controller is according to SW interchangers later
The neighbor state information of the port reported can obtain the physical couplings between SW interchangers, can obtain network section accordingly
Point topological relation.
By taking user's void machine VM10 as an example, user void machine VM10 sends LLDP messages by port 1, carries itself physically
Location, IP address, port 1 and device type (user's void machine).
SW1 receives LLDP messages from port 10, and the LLDP messages that parsing VM10 is sent are to obtain neighbours' shape of port 10
State information, including the physical address of VM10, IP address, port 1 and device type.SW1 study is connected to VM10's to port 10
Port 1, and VM10 is user's void machine.
SW1 can locally search recorded neighbor state information, not find the note with same physical address
Record, SW1 have found that the neighbor state information of port 10 changes, it was found that new neighbours, by the neighbor state information of port 10
Controller is reported to by Port Status Message, is wrapped in the Experimenter fields of Port Status Message
Physical address, IP address, port 1 and device type (user's void machine) containing VM10.
SW1 can also record the neighbor state information of the port 10 got, and new LLDP is being received by port 10
When message, according to the neighbours of the neighbor state information for the port 10 for parsing new LLDP Receive messages and recorded port 10
Status information is compared, to judge that the neighbours of port 10 change.
Controller receives the Port Status Message for the 10 neighbor state information of port for including SW1, from
The neighbor state information of exit port 10, including the physical address of VM10, IP address, port 1 are parsed in Experimenter fields
And device type, the neighbours that controller can preserve the port 10 of SW1 are VM10, the IP address of VM10, the end of the VM10 of connection
Mouth is port 1, and VM10 is user's void machine.
Other users void machine can also send LLDP messages, and controller can obtain the company between SW interchangers and user's void machine
Connect relationship.
Controller directly can also send Port Description Request Multipart Message to SW1,
The port-mark that Port Description Request Multipart Message are carried is port 4, and SW1 receives control
It, can be at the end for locally searching record after the Port Description Request Multipart Message that device processed is sent
The neighbor state information of mouth 4, if having recorded the neighbor state information of port 4, SW1 can pass through Port Description
Neighbor state information of the Experimenter fields of Reply Multipart Message to controller report port 4.
In this way, controller can obtain the connection between overall network equipment with the CPU computing resources of very little
Relationship does not need controller timing and sends packetout messages, is opened up with actively triggering interchanger transmission LLDP messages progress network
The detection flutterred, controller no longer need the packetin messages that timing receipt is encapsulated based on LLDP messages or ARP messages to maintain
Physical connection between network node reduces the protocol interaction of signalling path between controller and interchanger, improves entire
The operational efficiency of network.
Fig. 8 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.The device can answer
For the interchanger in SDN, as shown in figure 8, the device includes：
First receiving module 41, for finding agreement LLDP messages by first port receives link layer；
First parsing module 42, for parsing LLDP messages to obtain the neighbor state information of first port；
First reporting module 43, for when being changed according to the neighbours of neighbor state information monitoring to first port, recording
Neighbor state information after first port variation, and by first message to after first port variation described in controller report
Neighbor state information.
Interchanger monitors switch port connection by the neighbor state information of LLDP agreement learning physics port with this
Neighbours change.When monitoring neighbours' variation, interchanger can notice the neighbours of port to controller in time by first message
Status information.Therefore, controller can obtain connection relation, user's void machine and access in SDN between switch device in time
Connection relation between interchanger need not periodically send packetout messages, and LLDP messages are sent actively to trigger interchanger
The detection of network topology is carried out, controller no longer needs the packetin that timing receipt is encapsulated based on LLDP messages or ARP messages
Message safeguards the physical couplings of the network equipment, reduces the protocol interaction of signalling path between controller and interchanger,
Improve the operational efficiency of whole network.
Fig. 9 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Optionally, described device can also include：
Third receiving module 44, the second message for receiving controller transmission, second message include first port mark
With report enabled identification field；
First port is arranged if reporting enabled identification field to meet preset condition for second message in setup module 45
Identify neighbor state information of the corresponding port by first message to the controller report port.
Optionally, described device can also include：
4th receiving module 47, the third message for receiving controller transmission, third message include second port mark；
Second reporting module 48, the neighbor state information for second port to be identified to corresponding port by the 4th message
It is reported to controller.
Optionally, the neighbor state information includes the physical address for the equipment being connect with first port, the addresses IP, goes out
Port and device type, second message are port modifications message Port Modification Message, and first message is end
The experiment Experimenter fields of mouth state Port Status Message, the Port Status Message carry
Neighbor state information.
Figure 10 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.The device can answer
For the controller in SDN, as shown in Figure 10, which includes：
Second receiving module 51, for the first message that desampler is sent, the first message includes the exchange
The neighbor state information of machine first port；
Second parsing module 52, for parsing first message to obtain and preserve neighbor state information.
Figure 11 shows the block diagram of the device of the acquisition network node topology according to one embodiment of the disclosure.
Optionally, described device can also include：
First sending module 53, for interchanger send second message, second message include first port mark and on
Report enables identification field, so that interchanger reports enabled identification field setting first port mark corresponding according to second message
Mode of the port to the neighbor state information of the controller report port.
Optionally, described that enabled identification field is reported to meet preset condition.
Optionally, described device can also include：
Second sending module 54, for sending third message to interchanger, third message includes second port mark, so that
Interchanger identifies the neighbours of corresponding port after receiving third message by the 4th message to controller report second port
Status information.
Optionally, the neighbor state information includes the physical address for the equipment being connect with first port, the addresses IP, goes out
Port and device type, second message are port modifications message Port Modification Message, and first message is end
The experiment Experimenter fields of mouth state Port Status Message, the Port Status Message carry
Neighbor state information.
Optionally, in order to enable the controller to the neighbor state information of some port of active obtaining interchanger, controller can
To send third message to interchanger by the second sending module 54.After interchanger receives the third message of controller transmission,
It can determine that second port identifies corresponding second port, then by the 4th message (for example, Port Description
Reply Multipart Message) by the neighbor state information reporting of the port to controller.Specifically, interchanger is true
After determining second port, the neighbor state information of second port can be led in the neighbor state information for locally searching second port
The Experimenter fields for crossing Port Description Reply Multipart Message are reported to controller.
In this way, controller can be set with the neighbor state information of active obtaining interchanger to obtain interchanger
Connection relation between standby, between interchanger and user's void machine, connection that can be much sooner between aware switch equipment become
Change and user void machine reaching the standard grade and migrating.
Figure 12 is a kind of frame for obtaining the device 900 of network node topology shown according to an exemplary embodiment
Figure.Referring to Fig.1 2, the machine readable storage medium which may include processor 901, is stored with machine-executable instruction
902.Processor 901 can be communicated with machine readable storage medium 902 via system bus 903.Also, processor 901 passes through reading
Take machine-executable instruction corresponding with the logic of network node topology is obtained in machine readable storage medium 902 above to execute
The method of the acquisition network node topology.
Machine readable storage medium 902 referred to herein can be any electronics, magnetism, optics or other physical stores
Device can include or store information, such as executable instruction, data, etc..For example, machine readable storage medium can be：
RAM (Radom Access Memory, random access memory), volatile memory, nonvolatile memory, flash memory, storage are driven
Dynamic device (such as hard disk drive), solid state disk, any kind of storage dish (such as CD, dvd) or similar storage are situated between
Matter or combination thereof.
The presently disclosed embodiments is described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or technological improvement to the technology in market for best explaining each embodiment, or this technology is made to lead
Other those of ordinary skill in domain can understand each embodiment disclosed herein.
Claims (14)
1. a kind of method obtaining network node topology, which is characterized in that the method is applied in software defined network SDN
Interchanger, the method includes：
Agreement LLDP messages are found by first port receives link layer；
LLDP messages are parsed to obtain the neighbor state information of first port；
When changing according to the neighbours of neighbor state information monitoring to first port, the neighbours after the first port variation are recorded
Status information, and by first message to described in controller report first port variation after neighbor state information.
2. the method according to claim 1 for obtaining network node topology, which is characterized in that the method further includes：
The second message that controller is sent is received, second message includes first port mark and reports enabled identification field；
If the enabled identification field that reports of second message meets preset condition, setting first port identifies corresponding port by the
Neighbor state information of one message to the controller report port.
3. the method according to claim 1 for obtaining network node topology, which is characterized in that the method further includes：
The third message that controller is sent is received, third message includes second port mark；
Second port is identified into the neighbor state information reporting of corresponding port to controller by the 4th message.
4. a kind of method obtaining network node topology, which is characterized in that the method is applied to the controller in SDN, described
Method includes：
The first message that desampler is sent, the first message include the neighbor state letter of the interchanger first port
Breath；
First message is parsed to obtain and preserve neighbor state information.
5. the method according to claim 4 for obtaining network node topology, which is characterized in that the method further includes：
Second message is sent to interchanger, second message includes first port mark and reports enabled identification field, so as to exchange
Machine reports enabled identification field setting first port to identify corresponding port to the controller report port according to second message
Neighbor state information mode.
6. the method according to claim 5 for obtaining network node topology, which is characterized in that described to report enabled identifier word
Section meets preset condition.
7. the method according to claim 4 for obtaining network node topology, which is characterized in that the method further includes：
Third message is sent to interchanger, third message includes second port mark, so that interchanger is receiving third message
Identify the neighbor state information of corresponding port to controller report second port by the 4th message afterwards.
8. the method according to claim 1 or 4 for obtaining network node topology, which is characterized in that the neighbor state letter
Breath includes physical address, IP address, exit port and the device type for the equipment being connect with first port.
9. the method for the acquisition network node topology according to claim 2 or 5, which is characterized in that
Second message is port modifications message Port Modification Message.
10. the method for obtaining network node topology according to claim 1-7 any one of them, which is characterized in that first message
For port status message Port Status Message, the experiment Experimenter words of the Port Status Message
Section carries neighbor state information.
11. a kind of device obtaining network node topology, which is characterized in that described device is applied in software defined network SDN
Interchanger, described device includes：
First receiving module, for finding agreement LLDP messages by first port receives link layer；
First parsing module, for parsing LLDP messages to obtain the neighbor state information of first port；
First reporting module records described for when changing according to the neighbours of neighbor state information monitoring to first port
Single port variation after neighbor state information, and by first message to described in controller report first port variation after neighbours
Status information.
12. a kind of device obtaining network node topology, which is characterized in that described device is applied to the controller in SDN, described
Device includes：
Second receiving module, for the first message that desampler is sent, the first message includes the interchanger first
The neighbor state information of port；
Second parsing module, for parsing first message to obtain and preserve neighbor state information.
13. a kind of device obtaining network node topology, which is characterized in that including：
Processor；
Memory for storing processor-executable instruction；
Wherein, the processor is configured as executing described instruction realization the claims 1-10 any one of them methods.
14. a kind of non-volatile computer readable storage medium storing program for executing, is stored thereon with computer program instructions, which is characterized in that institute
State the method realized when computer program instructions are executed by processor described in any one of claims 1 to 10.
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