CN104780056B - A kind of method and apparatus of network management - Google Patents
A kind of method and apparatus of network management Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of network management and equipment, is related to the communications field, can be realized the router-level topology of global network.The specific scheme is that receiving the net element information that each network controller is sent, the corresponding network resource information of the net element information is obtained, and router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, generate routed path.The embodiment of the present invention is applied to network management.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of method and apparatus of network management.
Background technique
Software defined network (Software Defined Networking, abbreviation SDN) controller, by controlling and turning
The separation of hair, the optimization and scheduling of cross-layer, statistics and charging based on stream, the policy control based on stream, open north-south connects
Mouthful, it can be realized routing optimality, to keep network cost effective and intelligent.
The path-calculating element (Path Compute Element, abbreviation PCE) that Internet Engineering Task group proposes is responsible for
Path computing in multiprotocol label switching/Generalized Multiprotocol Label exchange network, PCE are based on known network topology structure
And constraint condition, it is adapted to complicated network topology structure, calculates the optimal path for meeting constraint condition for user.
During the optimization and path computing of stating network in realization, SDN network framework can only be to belonging to the same SDN
The network of the network architecture carries out routing optimality；The PCE network architecture can only carry out path meter to the network for belonging to the PCE network architecture
It calculates, when an IP packet needs to pass through multiple and different network architectures, SDN controller will be unable to route global network and carry out
Optimization, PCE can not route the global network for possessing SDN controller and calculate.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus of network management, can be realized the global administration to network.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, providing a kind of method of network management, it is applied to multiple-domain network, the multiple-domain network includes at least two
A forwarding device for being belonging respectively to not same area, each forwarding device are correspondingly connected with a network controller, comprising:
The net element information that each network controller is sent is received, the corresponding network resource information of the net element information is obtained,
The network resource information includes: the volume of transmitted data information between routing iinformation and network element between network element；
Router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, generates routed path.
Second aspect provides a kind of network management device, is applied to multiple-domain network, and the multiple-domain network contains at least two
It is belonging respectively to the forwarding device of not same area, each forwarding device is correspondingly connected with a network controller, comprising:
Global network state collection module, the net element information sent for receiving each network controller, obtains the net
The corresponding network resource information of metamessage, the network resource information include: between routing iinformation and network element between network element
Volume of transmitted data information；
Global network routing calculation module, for collecting mould to the global network state according to the routing policy of pre-configuration
The network resource information that block obtains carries out router-level topology, generates routed path.
In the above scheme, the net element information sent by receiving each network controller, obtains from the net element information
Corresponding network resource information, and router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, generate road
By path, to realize the router-level topology of global network.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is a kind of flow diagram for network management that the embodiment of the present invention provides；
Fig. 2 is a kind of flow diagram for network management that another embodiment of the present invention provides；
Fig. 3 is a kind of flow diagram for network management that another embodiment of the present invention provides；
Fig. 4 is a kind of position view of the network management device that provides of the embodiment of the present invention in multiple-domain network；
Fig. 5 is a kind of structural schematic diagram for network management device that the embodiment of the present invention provides；
Fig. 6 is a kind of structural schematic diagram for network management device that another embodiment of the present invention provides；
Fig. 7 is a kind of structural schematic diagram for network management device that another embodiment of the present invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The present invention provides a kind of method of network management, is applied to multiple-domain network, and the multiple-domain network contains at least two
Routed domain all includes at least one forwarding device in each routed domain.And all forwarding devices in each routed domain are right
A network controller should be connected, wherein the network controller can be the network of SDN controller, PCE or other concentrated
Controller.
The embodiment of the present invention provides a kind of method of network management, shown referring to Fig.1, comprising the following steps:
101, the net element information that each network controller is sent is received, the corresponding network resource information of net element information is obtained.
Network resource information includes: the volume of transmitted data information between routing iinformation and network element between network element.Wherein, net
Routing iinformation between member includes: link information, calculating and the topology information for safeguarding network between nodal information, node；Network element
Between volume of transmitted data information include: resource occupation information and resource statistics information.
Network controller can be the network controller of SDN controller, PCE or other concentrated, for providing network element
Information.By multi-protocols adaptation and parsing, the processing to various protocols net element information can be supported, wherein above-mentioned agreement includes:
OpenFlow(stream opens) agreement, OF-Config(OpenFlow Configuration, flow open configuration) agreement, IP/MPLS
(Internet Protocol/Multi-Protocol Label Switching, network protocol/multiprotocol label switching),
PCEP (Path Computation Element Protocol, path computation element protocol), SNMP(Simple Network
Management Protocol, Simple Network Management Protocol).
102, router-level topology is carried out to network resource information according to the routing policy of pre-configuration, generates routed path.
The routing policy of pre-configuration includes at least one of the following: routing forwarding priority, the whole network flow equalization, flow table matching
?.Wherein, the routing policy needs of pre-configuration are set according to specific network application scene demand.For backbone network, need
Configure Protection path；For data center, routing policy needs to cope with the congestion problems of network operation peak period.In this way, can be with
The routed path for meeting business demand and global network regulatory requirement is generated according to routing policy.
Optionally, the routing policy being pre-configured can also be updated according to above-mentioned network resource information, to make pre-configuration
Routing policy more optimizes, to adapt to current network management.
Wherein, the routed path for meeting service application demand includes the operating path of various businesses, according to different business
It can choose corresponding operating path.
In the above-described embodiments, the net element information sent by receiving each network controller, is obtained from the net element information
Corresponding network resource information is taken, and router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, is generated
Routed path, to realize the router-level topology of global network.
Optionally, the embodiment of the present invention provides a kind of method of network management, referring to shown in Fig. 2, comprising the following steps:
201, the net element information that each network controller is sent is received, the corresponding network resource information of net element information is obtained.
Network resource information includes: the volume of transmitted data information between routing iinformation and network element between network element.
202, router-level topology is carried out to network resource information according to the routing policy of pre-configuration, generates routed path.
The routing policy of pre-configuration includes at least one of the following: routing forwarding priority, the whole network flow equalization, flow table matching
?.Wherein, the routing policy needs of pre-configuration are set according to specific network application scene demand.For backbone network, need
Configure Protection path；For data center, routing policy needs to cope with the congestion problems of network operation peak period.In this way, can be with
The routed path for meeting business demand and global network regulatory requirement is generated according to routing policy.
Optionally, the routing policy being pre-configured can also be updated according to above-mentioned network resource information, to make pre-configuration
Routing policy more optimizes, to adapt to current network management.
203, business is generated according to the routed path for calculating generation and forwards flow table.
It wherein, may include the operating path and global network regulatory requirement of various businesses application in business forwarding flow table
Protection path.
204, business forwarding flow table is sent to corresponding network controller.
Further, which is sent to forwarding device by network controller, and forwarding device turns according to the business
It sends out flow table and carries out global network data service end to end.
The business forwarding flow table that above scheme generates can be used for the transmission of the data between routed domain, for example:
When carrying out data interchange between two SDN routed domains,
When first forwarding device (transmitting terminal) in the first domain SDN is sent out to second forwarding device (receiving end) in the 2nd domain SDN
When sending data.Since the second forwarding device is in secondary route domain, the first forwarding device there is no the information of the second forwarding device,
Therefore the first forwarding device cannot send data to the second forwarding device according to current flow table.First forwarding device is by data packet
Header packet information is encapsulated with the format of OpenFlow agreement, and is sent to the first SDN controller, the first SDN controller cannot
The packet header matched is encapsulated with the format of OpenFlow agreement and is uploaded, and the information of upload is net element information, according to step 201-
204 method generation carries out generating corresponding business forwarding flow table.Flow table information pass through OpenFlow protocol encapsulation after respectively under
It is sent to the first SDN controller and the 2nd SDN controller, and each forwarding device along the service path is issued to by controller
On.In this way, first forwarding device in the first domain SDN can forward the packet to second forwarding device in the 2nd domain SDN.
Optionally, when transmission data of the SDN routed domain to a non-SDN routed domain,
When first forwarding device (transmitting terminal) in the domain SDN sends data to second forwarding device (receiving end) in the domain PCE.
Since the second forwarding device is in the domain PCE, there is no the information of the second forwarding device for the first forwarding device, therefore the first forwarding is set
It is standby to send data to the second forwarding device according to current flow table.First forwarding device by packet header information with
The format of OpenFlow agreement encapsulates, and is sent to SDN controller, SDN controller cannot matched packet header with
The format of OpenFlow agreement, which encapsulates, to be uploaded, and the information of upload is net element information, is generated and is carried out according to the method for step 201-204
Generate corresponding business forwarding flow table.Business is issued to SDN controller after forwarding flow table to encapsulate by OpenFlow and business turns
It delivers by being issued to PCE after PCEP protocol encapsulation, and be issued to by SDN controller and PCE along each of the service path
On forwarding device.After the completion of path is established, during first forwarding device in the domain SDN passes through data packet along the service path specified
Between forwarding device be sent to the final jump equipment in the domain SDN.Since the first jump equipment in the domain PCE cannot identify the domain SDN
The final jump equipment of the data packet of final jump equipment, the domain SDN encapsulates packet header with the format of OpenFlow agreement,
And it is sent to SDN controller, SDN controller will parse the header packet information of submission, obtains and obtains former place MAC Address, IP
The field informations such as address, QoS level, vlan number, MPLS label, and by corresponding information MAP into IP packet head.SDN control
Device encapsulates the IP packet head of generation with the format of OpenFlow agreement, and is issued to the final jump equipment in the domain SDN.The domain SDN
Final jump equipment IP packet head and data packet payload are assembled, and be sent to the first of the domain PCE and jump equipment, so as to the domain PCE
First jump equipment can identify the data packet.Then the first jump equipment in the domain PCE is along the service path specified by data packet
The second forwarding device is sent to by intermediate forwarding device.
Optionally, when transmission data of the non-SDN routed domain to a SDN routed domain,
When first forwarding device (transmitting terminal) in the domain PCE sends data to second forwarding device (receiving end) in the domain SDN.
Since the second forwarding device is in SDN by domain, there is no the information of the second forwarding device for the first forwarding device, therefore first forwards
Equipment cannot send data to the second forwarding device according to current flow table.First forwarding device by packet header information with
The format of PCEP agreement encapsulates, and is sent to PCE, PCE by cannot matched packet header encapsulated with the format of PCEP agreement
And upload, the information of upload is net element information, carries out generating corresponding business forwarding flow according to the method generation of step 201-204
Table.Business is issued to SDN controller after forwarding flow table to encapsulate by OpenFlow and business forwarding table passes through PCEP protocol encapsulation
After be issued to PCE, and be issued to along each forwarding device of the service path by SDN controller and PCE.Path has been established
Data packet is sent to by first forwarding device in the domain Cheng Hou, PCE along the service path specified by intermediate forwarding device
The final jump equipment in the domain PCE.Since the first jump equipment in the domain SDN cannot identify the data packet of the final jump equipment in the domain PCE,
The packet header that the first jump equipment in the domain SDN sends over the final jump equipment in the domain PCE is with the lattice of OpenFlow agreement
Formula encapsulation, and it is sent to SDN controller, SDN controller will parse the header packet information of submission, obtains and obtains original place MAC
The field informations such as address, IP address, QoS level, vlan number, MPLS label, and by corresponding information MAP to Business Stream packet header
In domain.SDN controller encapsulates the service flow packet header field of generation with the format of OpenFlow agreement, and is issued to the of the domain SDN
One jumps equipment.The first of the domain SDN jumps equipment and assembles service flow packet header field and data packet payload, and the first of the domain SDN is made to jump equipment
It can identify the data packet.Then the first jump equipment in the domain SDN is turned data packet by intermediate along the service path specified
Hair equipment is sent to the second forwarding device.
In the above-described embodiments, the net element information sent by receiving each network controller, is obtained from the net element information
Corresponding network resource information is taken, and router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, is generated
Routed path.According to the routing policy of pre-configuration and the routed path generation business forwarding flow table generated is calculated, passes through network control
The business forwarding flow is sent to forwarding device by device processed, and forwarding device forwards flow table progress global network end-to-end according to the business
Data service.To realize global network management.
The embodiment of the present invention provides a kind of method of network management, referring to shown in Fig. 3, which is characterized in that including following
Step:
301, the net element information that each network controller is sent is received, the corresponding network resource information of net element information is obtained.
302, router-level topology is carried out to network resource information according to the routing policy of pre-configuration, generates routed path.
The routing policy needs of pre-configuration are set according to specific network application scene demand.For backbone network, need
Configure Protection path；For data center, routing policy needs to cope with the congestion problems of network operation peak period.In this way, can be with
The routed path for meeting business demand and global network regulatory requirement is generated according to routing policy.
Optionally, the routing policy being pre-configured can also be updated according to above-mentioned network resource information, to make pre-configuration
Routing policy more optimizes, to adapt to current network management.
303, virtualization network is generated according to network resource information, the routed path of calculating and routing policy.
304, business monitoring is carried out to multiple-domain network according to virtualization network and is configured with service application.
The network equipment all in network is considered as to the resource being managed, according to the principle of operating system, is controlled in virtualization
A network operating system (virtualization network) is taken out on device processed, on the one hand this network operating system has been abstracted bottom-layer network
The detail of equipment, while unified administration view and programming interface are also provided for upper layer application.In this way, being grasped based on network
Make this platform of system, user can develop various application programs, define network topology in logic, by software to meet
To the different demands of Internet resources, without being concerned about the physical topological structure of bottom-layer network.
Wherein, business monitoring is the net source service provided based on virtualization network, can be turned in global network
It sends out equipment to carry out: port monitoring, various businesses monitoring, the flow analysis of port-to-port.
Wherein, service application is to realize business configuration end to end to global network, and will according to different applied business
The configuration information is forwarded to corresponding forwarding device by the network controller of SDN controller or PCE or other concentrated, so as to
Forwarding device carries out data service according to the configuration information.
In the above-described embodiments, virtualization net is generated according to network resource information, the routed path of calculating and routing policy
Network carries out business monitoring to multiple-domain network according to virtualization network and configures with service application.Realize global network management
Global monitoring function improves the flexibility of global network management.
Of the invention provides a kind of network management device 400, is applied to multiple-domain network, referring to shown in Fig. 4, multiple-domain network packet
The forwarding device for being belonging respectively to not same area containing at least two, each forwarding device are correspondingly connected with a network controller, wherein should
Network controller can be the network controller of SDN controller, PCE or other concentrated, and network management device is for receiving
The net element information that above-mentioned network controller is sent, in this way, network management device 400 bottom need with a multi-protocols adaptation and
Analyzing device 500 is connected, and the multi-protocols adaptation and analyzing device can support the processing to various protocols net element information, wherein
Above-mentioned agreement includes: that OpenFlow(stream opens) agreement, OF-Config(OpenFlow Configuration, stream is open to match
Set) agreement, IP/MPLS(Internet Protocol/Multi-Protocol Label Switching, network protocol/more
Protocol label exchange), PCEP (Path Computation Element Protocol, path computation element protocol), SNMP
(Simple Network Management Protocol, Simple Network Management Protocol).And pass through network controller to forwarding
Equipment sends deployment information, so that forwarding device carries out data service according to the deployment information.
The embodiment of the present invention provides a kind of network management device 400, referring to Figure 5, comprising:
Global network state collection module 401, the net element information sent for receiving each network controller, obtains network element
The corresponding network resource information of information.
Network resource information includes: the volume of transmitted data information between routing iinformation and network element between network element.Wherein, net
Routing iinformation between member includes: link information, calculating and the topology information for safeguarding network between nodal information, node；Network element
Between volume of transmitted data information include: resource occupation information and resource statistics information.
Global network routing calculation module 402, for collecting mould to global network state according to the routing policy of pre-configuration
The network resource information that block 401 obtains carries out router-level topology, generates routed path.
The routing policy of pre-configuration includes at least one of the following: routing forwarding priority, the whole network flow equalization, flow table matching
?.Wherein, the routing policy needs of pre-configuration are set according to specific network application scene demand.For backbone network, need
Configure Protection path；For data center, routing policy needs to cope with the congestion problems of network operation peak period.In this way, can be with
The routed path for meeting business demand and global network regulatory requirement is generated according to the routing policy of pre-configuration.
Further, the network management device 400, further includes:
Global policies management module 403, for being pre-configured according to service application demand and the configuration of global network regulatory requirement
Routing policy；
Global policies management module 403 is also used to the network resource information obtained according to global network state collection module
Update the routing policy being pre-configured.
In the above-described embodiments, the net element information that each network controller is sent is received by network management device, from this
Corresponding network resource information is obtained in net element information, and road is carried out to the network resource information according to the routing policy of pre-configuration
By calculating, routed path is generated, to realize the router-level topology of global network.
Optionally, referring to shown in Fig. 6, network management device 400 further include:
Flow table management module 404 is generated for calculating the routed path generated according to global network routing calculation module 402
Business forwards flow table；
It wherein, may include the operating path and global network regulatory requirement of various businesses application in business forwarding flow table
Protection path.
Flow table management module 404 is also used to business forwarding flow table being sent to corresponding network controller.
Further, which is sent to forwarding device by network controller, and forwarding device turns according to the business
It sends out flow table and carries out global network data service end to end.
Above equipment, the net element information sent by receiving each network controller, obtains from the net element information and corresponds to
Network resource information, and according to the routing policy of pre-configuration to the network resource information carry out router-level topology, generate routing road
Diameter.According to the routing policy of pre-configuration and the routed path generation business forwarding flow table generated is calculated, it will by network controller
The business forwarding flow is sent to forwarding device, and forwarding device forwards flow table to carry out global network data end to end according to the business
Business.To realize global network management.
It is further alternative, referring to shown in Fig. 7, network management device 400 further include:
Network virtualization module 405, the routed path calculated according to network resource information, global network routing calculation module
Virtualization network is generated with routing policy；
Business module 406 carries out business prison to multiple-domain network according to the virtualization network that network virtualization module 405 generates
It controls and is configured with service application.
Wherein, business monitoring is the net source service provided based on virtualization network, can be turned in global network
It sends out equipment to carry out: port monitoring, various businesses monitoring, the flow analysis of port-to-port.
Wherein, service application is to realize business configuration end to end to global network, and will according to different applied business
The configuration information is forwarded to corresponding forwarding device by the network controller of SDN controller or PCE or other concentrated, so as to
Forwarding device carries out data service according to the configuration information.
In above equipment, virtualization network, root are generated according to network resource information, the routed path of calculating and routing policy
Business monitoring is carried out to multiple-domain network according to virtualization network and is configured with service application.Realize the global monitoring function of network management
Can, improve the flexibility of network management.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (8)
1. a kind of method of network management is applied to multiple domain SDN network, the multiple domain SDN network contains at least two routed domain,
It all include at least one forwarding device in each routed domain, each forwarding device is correspondingly connected with a network controller,
The network controller includes SDN controller, path-calculating element PCE, which is characterized in that the described method includes:
The net element information that each network controller is sent is received, the net element information is packet header with OpenFlow/PCEP agreement
The packet information that format encapsulation uploads, obtains the corresponding network resource information of the net element information, the network resource information
It include: the volume of transmitted data information between the routing iinformation and network element between network element；
Router-level topology is carried out to the network resource information according to the routing policy of pre-configuration, generates routed path；
Virtualization network is generated according to the network resource information, the routed path of calculating and the routing policy；It is described
Virtualization network is used to be abstracted the detail of underlay network device and provides unified administration view and programming for upper layer application
Interface；
Business monitoring is carried out to the multiple domain SDN network according to the virtualization network and service application configures.
2. the method according to claim 1, wherein the routing policy of the pre-configuration includes following at least one
: routing forwarding priority, the whole network flow equalization, flow table occurrence.
3. the method according to claim 1, wherein the method also includes:
The routing policy of the pre-configuration is configured according to service application demand and global network regulatory requirement；
The routing policy of the pre-configuration is updated according to the network resource information.
4. method according to claim 1-3, which is characterized in that the method also includes:
Business forwarding flow table is generated according to the routed path generated is calculated；
Business forwarding flow table is sent to corresponding network controller.
5. a kind of network management device is applied to multiple domain SDN network, the multiple domain SDN network contains at least two routed domain,
It all include at least one forwarding device in each routed domain, each forwarding device is correspondingly connected with a network controller, institute
Stating network controller includes SDN controller, path-calculating element PCE characterized by comprising
Global network state collection module, the net element information sent for receiving each network controller, the net element information are
The packet information that packet header is encapsulated with the format of OpenFlow/PCEP agreement, obtains the corresponding Internet resources of the net element information
Information, the network resource information include: the volume of transmitted data information between routing iinformation and network element between network element；
Global network routing calculation module, for being obtained according to the routing policy of pre-configuration to the global network state collection module
The network resource information taken carries out router-level topology, generates routed path；
Network virtualization module, according to the network resource information, global network routing calculation module, the routing road of calculating
Diameter and the routing policy generate virtualization network；The virtualization network is used to be abstracted the detail of underlay network device simultaneously
Unified administration view and programming interface are provided for upper layer application；
Business module carries out business to the multiple domain SDN network according to the virtualization network that the network virtualization module generates
Monitoring and service application configuration.
6. equipment according to claim 5, which is characterized in that the routing policy of the pre-configuration includes following at least one
: routing forwarding priority, the whole network flow equalization, flow table occurrence.
7. equipment according to claim 5, which is characterized in that the equipment further include:
Global policies management module, for configuring the road of the pre-configuration according to service application demand and global network regulatory requirement
By strategy；
The global policies management module is also used to the network resource information obtained according to the global network state collection module
Update the routing policy of the pre-configuration.
8. according to the described in any item equipment of claim 5-7, which is characterized in that the equipment further include:
Flow table management module generates business turn for calculating the routed path generated according to the global network routing calculation module
Send out flow table；
The flow table management module is also used to business forwarding flow table being sent to corresponding network controller.
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| CN106357537B (en) * | 2016-11-09 | 2019-08-09 | 北京工业大学 | A kind of link monitoring method based on SDN multi-path transmission |
| CN107465615B (en) * | 2017-08-03 | 2020-05-05 | 全球能源互联网研究院有限公司 | Routing determination method based on layered multi-domain and controller |
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| CN111211975B (en) * | 2018-11-22 | 2022-05-24 | 中国电信股份有限公司 | Flow table generation method and device, software defined network, and storage medium |
| CN110866599A (en) * | 2019-11-08 | 2020-03-06 | 芯盟科技有限公司 | Chip and method for establishing data path in chip |
| CN113709048A (en) * | 2020-05-21 | 2021-11-26 | 中国移动通信有限公司研究院 | Routing information sending and receiving method, network element and node equipment |
| CN113852479B (en) * | 2020-06-28 | 2022-12-02 | 中移(成都)信息通信科技有限公司 | Secure network construction method, device, equipment and computer storage medium |
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| CN103229468A (en) * | 2012-11-19 | 2013-07-31 | 华为技术有限公司 | Packet-switching resource distribution method and device |
| EP2680540A1 (en) * | 2012-06-27 | 2014-01-01 | Juniper Networks, Inc. | Feedback Loop for Service Engineered Paths |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1773930A (en) * | 2004-11-09 | 2006-05-17 | 华为技术有限公司 | Method for carrying net resource supervisor to automatic acquire carrying net information |
| EP2680540A1 (en) * | 2012-06-27 | 2014-01-01 | Juniper Networks, Inc. | Feedback Loop for Service Engineered Paths |
| CN103229468A (en) * | 2012-11-19 | 2013-07-31 | 华为技术有限公司 | Packet-switching resource distribution method and device |
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