CN103166909B - The cut-in method of a kind of Virtual Networking System, device and system - Google Patents
The cut-in method of a kind of Virtual Networking System, device and system Download PDFInfo
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Abstract
The invention provides a kind of method accessing and controlling user terminal access of virtual network system in network system, access network system to include controlling server and connected some network access equipments thereof, network connection system is created controlling server, this network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode, next, control server and the network connection system corresponding to user terminal is sent to network access equipment, network access equipment is made as user terminal according to described network connection and is configured to the network link of Virtual Networking System。Controlling server and can realize in access authentication equipment, when user terminal carries out access authentication, network connection system is allocated to network access equipment by access authentication protocol mode by it。
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of enter in network system configuration user terminal to the methods, devices and systems of appointment Virtual Networking System。
Background technology
The Internet is from the initial data service only considering " doing one's best ", and the application developing into present the Internet is all-embracing, and enters real time business。But, because the Internet is to be provided service by multiple service provider, make to adopt a kind of new framework or on existing framework, carry out some amendments to become very difficult, cause that existing Internet technology is unfavorable for supporting mobility, have impact on the autgmentability of core route, reduce the usefulness of existing security mechanism, hinder the development of new network。
For the rigid problem solving the Internet the innovation stimulating future network to study, the method for network virtualization is suggested, and becomes the emphasis of future network research work。By allowing network to share the underlying physical resource such as identical physical link and router, virtual environment structure stalwartness, believable, that be easily managed, for the virtual resource that the request distribution of various virtual nets is suitable, realize resource-sharing, improve infrastructure resources utilization rate, be the main target of network virtualization。
Accessing network system aspects, one basis provided by basis access Virtual network operator is accessed network and be will be responsible for providing user terminal to connect to the network some Virtual Networking Systems, for the latter, it is a kind of tenantable Internet resources that network is accessed on basis, how configuring and effectively user terminal being connected to the virtual network specified is suffer from a problem that, is generally adopted following manner at present:
Static configuration mode: namely in the network access equipment that basis is accessed in network, user terminal employing is pre-configured with network and is connected to appointment Virtual Networking System, for instance: configuration user terminal is VLAN (VLAN) member etc. of a virtual network。But which can not meet the dynamic need of terminal use, lack spirit and property and effectiveness, such as: user terminal requires connect to IPTV Internet Service Provider to obtain IPTV service in certain moment, Internet network service provider is required connect to obtain network browsing or OTT (internet television) service in an other moment。
IP tunnel mode: user terminal obtains own IP address, specifies the access node IP address of Virtual Networking System, and set up IP tunnel between himself and described access node, but, under which, IP tunnel passes through last one kilometer and accesses network system, waste Internet resources, and data-transmission efficiency is low。
Summary of the invention
It is desirable to provide a kind of technical scheme supporting dynamic configuration mode to control user terminal access of virtual network system。
According to an aspect of the present invention, a kind of method accessing and controlling user terminal access of virtual network system in network system is provided here, access network system to include controlling server and connected some network access equipments thereof, first, controlling server and create network connection system, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；It follows that control server the network connection system corresponding to user terminal is sent to network access equipment；Afterwards, network access equipment is made as user terminal according to described network connection and is configured to the network link of Virtual Networking System。
According to another aspect of the present invention, a kind of control server for controlling user terminal access of virtual network system is provided here, it includes: create device, for creating network connection system, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；Configuration device, for being sent to described network access equipment by described network connection system。
According to another aspect of the present invention, a kind of method in the control server access network system for controlling user terminal access of virtual network system is provided here, access network system to include controlling server, some network access equipments, and user terminal, first, it creates network connection system, and described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；Afterwards, described network connection system is sent to described network access equipment by it。
According to another aspect of the present invention, here provide a kind of for connecting the user terminal network access equipment to Virtual Networking System, it includes: configuration device, for obtaining the network connection system corresponding to user terminal, described network connection system on network access equipment to the Virtual Networking System that in predefined mode, user terminal is linked into its correspondence；Network connection device, is made as user terminal according to described network connection and is configured to the network link specifying Virtual Networking System。
According to another aspect of the present invention, here provide a kind of network access equipment that accesses in network system for connecting the user terminal method to Virtual Networking System, first, it obtains the network connection system corresponding to user terminal, and described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；Afterwards, it is made as user terminal according to described network connection and sets up the network link specifying Virtual Networking System。
The present invention can have technical advantage potential as follows:
Access network system operator and can adopt that technological means flexibly is on-demand is connected to corresponding virtual network by the terminal use of virtual network, user need not be tied to certain specific operator statically, access network system and can dynamically set up the connection of required network accessing this user, the bandwidth that its network connects, the characteristics such as safety can configure (such as: user has certain QoS to this section of link of virtual operator's network according to contractual requirements, if virtual operator's network is not directly connected with access network system, can be that the virtual network foundation of user and its correspondence is from access node to the connection of the IP tunnel of virtual network node)。In addition, owing to dynamic network can be adopted to connect configuration, access network system and can reclaim the connection of unwanted network in time, simultaneously, access net system operator when being linked into its required virtual network by user terminal, access net system in order to make oneself can hold more business or user, available load balancing from now on, specify the modes such as particular transmission path to connect the user to virtual network needed for it, thus reaching the purpose of system optimization。
Accompanying drawing explanation
By the detailed description with the accompanying drawing being set forth below, inventive feature, character and advantage will be apparent from, and element identical in accompanying drawing has identical mark, wherein:
Fig. 1 illustrates the network topology structure schematic diagram of the access network system of a specific embodiment according to the present invention；
Fig. 2 illustrates the network link configuration schematic diagram in the access network system of a specific embodiment according to the present invention；
Fig. 3 illustrates the network link configuration schematic diagram in the access network system of a specific embodiment according to the present invention；
Fig. 4 illustrates the network link configuration schematic diagram in the access network system of a specific embodiment according to the present invention；
Fig. 5 illustrates the network connection configuration flow figure of a specific embodiment according to the present invention；
Fig. 6 illustrates the illustrative view of functional configuration controlled in server of a specific embodiment according to the present invention；
Fig. 7 illustrates the illustrative view of functional configuration of the network access equipment of a specific embodiment according to the present invention；
Fig. 8 illustrates the network connection transfer case based on radius protocol of a specific embodiment according to the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail。
In the network topology structure schematic diagram accessing network system as shown in Figure 1, access network system 20 and will be responsible for providing user terminal 11,12,13 to connect to the network between some Virtual Networking Systems 30,31 and the Internet 32, wherein:
User terminal 11 belongs to the user of Virtual Networking System 31, between it and this Virtual network operator, the network bandwidth, service quality has been arranged；User terminal 12 belongs to the user of Virtual Networking System 31, the Internet 32, has arranged with regard to safety between it and Virtual Networking System 31 operator；User terminal 13 belongs to the user (VLAN) of Virtual Networking System 30。
Access network system 20 and include some network access equipments 211,212, control server 220 etc.。Network access equipment can be DSLAM, OLT, lan switch etc. according to concrete access technology mode (such as DSL, Ethernet or PON) difference, can be wired or wireless mode between it and user terminal 11,12,13。
Virtual Networking System 30,31 can be a virtual network operation business (VNO), itself does not have telecom network resource, by renting the infrastructure of telecommunication of telecom operators, telecommunications service are carried out deep processing, the novel telecom operators of service are provided with the brand of oneself；Or but an application service provider (ASP), it provides the business on value-added service and three layers, for instance IMS, enterprise's application etc. are, and provide and manage the application on IP layer；Or but an Internet Service Provider (NSP), it provides the user IP and connects and telecommunication service, and these services are to meet prior and user's foundation service agreement, in order to provide these to service, one NSP needs and one or more NAP signing, to use access network equipment。
According to embodiment provided by the present invention, we can control to create on server 220 network connection system in accessing network system 20, and this network connection system can be used for being linked into by user terminal 11,12,13 Virtual Networking System 30,31 or the Internet 32 of its correspondence on network access equipment。
Afterwards, control server 220 and in several ways the network connection system corresponding to aforementioned user terminal can be sent respectively to they corresponding network access equipments 211, 212, typically, controlling server 220 can be an access authentication equipment, it can when user terminal carries out access authentication, by access authentication protocol massages, network connection system is sent to aforementioned network access device 211, 212, for widely used radius protocol, access authentication equipment can ask (AccessRequest) according to its access authentication received, after subscriber terminal access authentication passes through, by accessing acceptance (AccessAccept) message, described network connection system is sent to described network access equipment。
Finally, network access equipment 211,212 is made as user terminal 11,12,13 according to the network connection obtained and is configured to the network link of Virtual Networking System 30,31 or the Internet 32。
Network connection system in the present embodiment can include internetwork connection mode and corresponding network parameter thereof, under specific circumstances, controlling server 220 can ask the particular network device in Virtual Networking System 30,31 to obtain network connection system corresponding to user terminal or corresponding network parameter further。
Further combined with the network link configuration schematic diagram in the access network system that legend 2 is illustrated, internetwork connection mode corresponding to user terminal 11 can enable network access equipment 211 and with the path fashion of a kind of optimization, user terminal 11 be linked into its Virtual Networking System 31 specified according to network parameter accessing network system, so can ensure the network bandwidth that this user arranges, the characteristic requirements such as service quality, network parameter includes RSVP, quality of service guarantee, path access node 241, the IP address information of 243 or from 211 to virtual network the label information etc. of label switched path。
Further combined with the network link configuration schematic diagram in the access network system that legend 3 is illustrated, internetwork connection mode corresponding to user terminal 12 can enable network access equipment 211 and set up, is configured to the IP secure tunnel connection of Virtual Networking System 31 according to network parameter, and network parameter includes the IP address of the access node 312 in Virtual Networking System 31；Meanwhile, this internetwork connection mode also can enable network access equipment 211 and set up the IP connection of internet according to network parameter。So, its service dynamic can be switched in the network link configured according to the demand for services of user terminal by network access equipment, and owing to IP secure tunnel is without passing through last one kilometer (i.e. user terminal to the physical link between network access equipment) again, the configuration requirement of user side also can suitably reduce accordingly。
What deserves to be explained is, can be without being joined directly together between Virtual Networking System 31 and access network system 20, can be connected by IP subnet, now set up also by IP tunnel mode and connect from network access equipment 211 to the network of Virtual Networking System 31。
Further combined with the network link configuration schematic diagram in the access network system that legend 4 is illustrated, internetwork connection mode corresponding to user terminal 13 can enable network access equipment 212 and be configured to the data forwarding mechanism based on VLAN of Virtual Networking System 30 according to network parameter, and its network parameter includes VLAN labelling。
Fig. 5 illustrates that a specific embodiment according to the present invention is to control the network connection configuration flow figure of user terminal access of virtual network system, below in conjunction with Fig. 3, this specific embodiment is described in detail, still illustrates using access authentication equipment as controlling server。
Step S501, first user terminal 12 carries out access authentication request before accessing network system, and it submits the user profile of self to network access equipment 211。
Step S502, described user profile can be encapsulated in access request (Access-Request) message based on radius protocol and be sent to the access authentication equipment 220 accessed in network system by network access equipment 211。
Step S503, the user profile accessed in request message is verified by access authentication equipment 220, find the user that it is Virtual Networking System 31, and the IP tunnel mode that the internetwork connection mode of correspondence is agreement, it can ask the certificate server 311 in Virtual Networking System 31 to obtain the network parameter corresponding to this IP tunnel connected mode further, for instance the IP address of the access node 312 in Virtual Networking System 31；
Preferably, in abovementioned steps S503, the access request message received can be transmitted to the certificate server 311 in its corresponding Virtual Networking System 31 according to its user property by access authentication equipment 220, after user profile is verified by certificate server 311, network connection system or corresponding network parameter are sent to access authentication equipment 220。
Step S504, access authentication equipment 220 after user terminal 12 access authentication passes through, by access accept (AccessAccept) message by comprising internetwork connection mode, the network connection system of map network parameter is sent to described network access equipment 211。
Step S505, network access equipment 211 is made as user terminal 12 according to the network connection obtained and is configured to the network link of Virtual Networking System 31, that is: consulting to set up IP tunnel between the access node 312 of its own and Virtual Networking System 31, thus network access equipment 211 place will set up a session connection for this user terminal 12。
Step S506, network access equipment 211 sends access authentication success response message to user terminal 12。
Step S507, network access equipment 211 is when receiving the packet of user terminal 12, according to aforementioned session connection this packet can be sent to by IP tunnel the access node 312 in Virtual Networking System 31, or it is when receiving from the packet of the access node 312 in Virtual Networking System 31, delivers a packet to corresponding user terminal 12 according to aforementioned session connection。
Fig. 6 illustrates the illustrative view of functional configuration controlling service of a specific embodiment according to the present invention, below in conjunction with Fig. 1, a specific embodiment of the present invention shown in Fig. 6 is described in detail。
Control server 220 to include creating device 251 and configuration device 252。
First, create device 251 and create network connection system, this network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode, this network connection system can meet the service contract between user terminal and its Virtual Networking System, is supported by accessing network system and Virtual Networking System。
Preferably, network connection system includes internetwork connection mode and corresponding network parameter, as mentioned before, network connection system corresponding to user terminal 11 can enable network access equipment 211 and in path optimizing mode, user terminal 11 be linked into its Virtual Networking System 31 specified according to network parameter accessing network system, network parameter includes RSVP, the information such as quality of service guarantee, path node；Or the network connection system corresponding to user terminal 12 can to enable network access equipment 211 according to network parameter be that user terminal 12 sets up the IP tunnel of Virtual Networking System 31, network parameter can be the IP address of the access node 312 in Virtual Networking System 31；Or the network connection system corresponding to user terminal 12 can to enable network access equipment according to network parameter be the data forwarding mechanism of the VLAN specified that user terminal 12 sets up Virtual Networking System 30, network parameter includes VLAN labelling。
Those of ordinary skill in the art, it will be appreciated that create device 251 when creating network connection, can ask the Virtual Networking System corresponding to user terminal to obtain network connection system corresponding to terminal or network of relation parameter further。
Then, the network connection system that establishment device 251 creates is sent to the network access equipment of correspondence by configuration device 252, it can at user terminal 11, 12, 13 when carrying out access authentication, by access authentication protocol massages, the network connection system of its correspondence is sent to the network access equipment corresponding to terminal, for widely used radius protocol, access authentication equipment asks (AccessRequest) according to its access authentication received, after subscriber terminal access authentication passes through, described network connection system is sent to described network access equipment by accessing acceptance (AccessAccept) message by configuration device 252
Fig. 7 illustrates that the network in the network access equipment of a specific embodiment according to the present invention connects and controls device, below in conjunction with Fig. 1, a specific embodiment of the present invention shown in Fig. 7 is described in detail。
Network access equipment 211,212 will include configuration device 261, network connection device 262, wherein:
Configuration device 261 is for obtaining the network connection system corresponding to user terminal, network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal, as previously mentioned, it is acceptable from one accessed in the network system configuration controlling server 220, it is thus achieved that the network connection system corresponding to user terminal。
Preferably, network connection system includes internetwork connection mode and corresponding network parameter,
Next, network connection device 262 is made as user terminal according to described network connection and is configured to the network link specifying Virtual Networking System, it can be made as user terminal 11 according to network connection and with the path fashion of a kind of optimization, user terminal 11 is linked into its Virtual Networking System 31 specified accessing network system, so can ensure the characteristic requirements such as the network bandwidth, service quality that this user arranges；Or user terminal 12 foundation can be made as according to network connection, be configured to the IP secure tunnel of Virtual Networking System 31 and be configured to the IP connection of internet simultaneously for this user terminal；Or user terminal 12 can be made as according to network connection and be configured to the data forwarding mechanism based on VLAN of Virtual Networking System 30
So, network access equipment, when receiving from user's lateral terminal data, can carry out data forwarding according to aforementioned configured network link。
Fig. 8 illustrates that the network being created to Virtual Networking System to configure network access equipment for user terminal by transmitting network connection system in radius protocol message of a specific embodiment according to the present invention connects。,
RADIUS (remote customer dialing authentication) is one of current most widely used access authentication agreement, owing to its agreement is simply clear and definite, extendible, therefore it is widely applied, the business such as including plain old telephone online, ADSL online, partial wideband online, IP phone, the vector that whole work that this agreement carries out are all based on Attribute-Length-Value carries out。
Generally, user terminal is when accessing one and accessing network system, network access equipment is as a radius client, it uses Access-Request packet to submit user profile to access authentication server, access authentication server to the user name of its submission and, the legitimacy of the user profile such as password tests, by being analyzed with database information, if certification success, then the authority information of user is accepted (Access-Accept) with certification and be sent to radius client；If authentification failure, then return authentication refusal (Access-Reject)。
Radius protocol data pack arrangement includes the field informations such as type (Code), identifier (Identifier), length (Length), authentication code, attribute (Attributes), wherein, attribute carries specific authentication authorization message, a part in the Format Reference of attribute such as legend 8, it includes type (Type) field, and its length is a byte；Length (Length) field, its length is a byte；Property value (Value), it is possible to being zero or multiple byte, it comprises the customizing messages of this attribute。
We can by being sent to the network access equipment of its correspondence in Access-Accept protocol package (corresponding Radius protocol data bag Code is 2) by the network connection system corresponding to user terminal, in its attribute (Atributes), type (Type) field uses one unallocated number to define this Access-Accept protocol package and carries network connection system, wherein:
Type (Type): represent network connection system with about definite value, this network connection system for this user terminal being linked into the Virtual Networking System of its correspondence on network access equipment,
Value (Value), the network parameter using which kind of internetwork connection mode and correspondence thereof will be comprised, with reference to the b part in legend 8, its internal structure can farther include a subtype (Sub-type) and represent that a kind of specific internetwork connection mode, fixing 8 bit lengths (Length1) and value (Value1) are to represent the network parameter under aforementioned network connected mode with a specific value, specifically:
When subtype (Sub-type) its value is " 1 ", can represent that this network connection system uses internetwork connection mode-path optimizing mode, with reference to the b1 part in legend 5, Value1 includes the path optimizing parameter required for this path optimizing mode, such as: the network bandwidth, the network node quantity of path optimizing and their IP address。
Subtype (Sub-type) its value be " 2 " time, can represent that this network connection system uses internetwork connection mode-IP tunnel mode, with reference to the b2 part in legend 5, Value1 includes the network parameter required for this IP tunnel mode, for instance: to should the IP address of AN of user terminal
When subtype (Sub-type) its value is " 3 ", can represent that this network connection system uses internetwork connection mode-VLAN mode, the network parameter required for this VLAN mode is included with reference to the b3 part Value1 in legend 5, for instance: distribute to the VLANID mark of this user terminal。
The network connection system that previous embodiment provides can realize in access authentication equipment, and when user terminal carries out network access authentication, Access-Accept message or other type of access authentication protocol massages (such as: Diameter) by Radius agreement are sent to its network access equipment；Those of ordinary skill in the art will be understood that, described network connection system maybe can realize in the other kinds of control server in accessing network system, it is sent to network access equipment in other types protocol massages mode by it, and then the particular type connected mode and corresponding network parameter of specifying Virtual Networking System are provided for user terminal。
Although described above is for the invention provides some embodiments; not it is used for limiting protection scope of the present invention; embodiment without departing from the scope and spirit in the present invention, can be carried out various amendment by the professional of the art, and this amendment belongs in the scope of the present invention。
Claims (17)
1. access the method controlling user terminal access of virtual network system in network system, access network system and include controlling server and connected some network access equipments thereof and switch, it is characterised in that comprise the steps:
A. controlling server and create network connection system, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；
B. control server and the network connection system corresponding to user terminal is sent to network access equipment；
C. network access equipment is made as user terminal according to described network connection and is configured to the network link of Virtual Networking System；
Wherein, described network connection system includes internetwork connection mode and corresponding network parameter thereof。
2. the method for claim 1, it is characterised in that in described step b, controls server and by access authentication protocol massages, described network connection system is sent to described network access equipment。
3. method as claimed in claim 2, it is characterized in that described access authentication agreement is radius protocol, control server after subscriber terminal access authentication passes through, by accessing acceptance (AccessAccept) message, described network connection system is sent to described network access equipment。
4. method as claimed in claim 3, it is characterised in that described control server asks Virtual Networking System to obtain the network connection system that user terminal is corresponding further。
5. Claims 1-4 arbitrarily as described in method, it is characterised in that in described step c, network access equipment according to described network connection be made as user terminal access data in network system transmission carry out path optimization。
6. Claims 1-4 arbitrarily as described in method, it is characterised in that in described step c, network access equipment is made as user terminal according to described network connection and sets up the IP tunnel of Virtual Networking System。
7. Claims 1-4 arbitrarily as described in method, it is characterised in that in described step c, network access equipment is made as user terminal according to described network connection and is configured to the data forwarding mechanism based on VLAN of Virtual Networking System。
8. the control server being used for controlling user terminal access of virtual network system, it is characterised in that including:
Creating device, be used for the network connection system that creates, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；
Configuration device, for being sent to described network access equipment by described network connection system；
Wherein, described network connection system includes internetwork connection mode and corresponding network parameter thereof。
9. control server as claimed in claim 8, it is characterised in that described network connection system is sent to described network access equipment by access authentication protocol massages by described configuration device。
10. control server as claimed in claim 9, it is characterized in that described access authentication agreement is radius protocol, described network connection system, after subscriber terminal access authentication passes through, is sent to described network access equipment by accessing acceptance (AccessAccept) message by described configuration device。
11. control server as claimed in claim 8, it is characterised in that create device and ask Virtual Networking System to obtain the network connection system that user terminal is corresponding further。
12. accessing the method controlling to be used for controlling user terminal access of virtual network system in server of network system, access network system and include controlling server, some network access equipments and user terminal, it is characterised in that comprise the steps:
A1. creating network connection system, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；
B1. described network connection system is sent to described network access equipment；
Wherein, described network connection system includes internetwork connection mode and corresponding network parameter thereof。
13. one kind for connecting the user terminal network access equipment to Virtual Networking System, it is characterised in that including:
Configuration device, for obtaining network connection system corresponding to user terminal, described network connection system on network access equipment to the Virtual Networking System that in predefined mode, user terminal is linked into its correspondence；
Network connection device, is made as user terminal according to described network connection and is configured to the network link specifying Virtual Networking System；
Wherein, described network connection system includes internetwork connection mode and corresponding network parameter thereof。
14. network access equipment as claimed in claim 13, it is characterised in that described network connection device is made as user terminal according to described network connection and carries out path optimization in access data in network system transmission。
15. network access equipment as claimed in claim 13, it is characterised in that described network connection device is made as user terminal according to described network connection and is configured to the IP tunnel of Virtual Networking System。
16. network access equipment as claimed in claim 13, it is characterised in that described network connection device is made as user terminal according to described network connection and is configured to the data forwarding mechanism based on VLAN of Virtual Networking System。
17. one kind is accessed in network system network access equipment for connecting the user terminal method to Virtual Networking System, it is characterised in that comprise the steps:
A2. obtaining the network connection system corresponding to user terminal, described network connection system for being linked into the Virtual Networking System of its correspondence on network access equipment by user terminal in predefined mode；
B2. it is made as user terminal according to described network connection and sets up the network link specifying Virtual Networking System；
Wherein, described network connection system includes internetwork connection mode and corresponding network parameter thereof。
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| CN104703211B (en) * | 2013-12-04 | 2018-06-19 | 华为技术有限公司 | A kind of virtualization cut-in method and equipment |
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| CN107241254B (en) * | 2017-05-19 | 2020-06-05 | 北京知道创宇信息技术股份有限公司 | Network connection device, network system and networking method |
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| CN101087236A (en) * | 2007-08-09 | 2007-12-12 | 杭州华三通信技术有限公司 | VPN access method and device |
| CN101453527A (en) * | 2007-11-30 | 2009-06-10 | 华为技术有限公司 | Method, network system and network appliance for dynamic policy conversion |
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| CN1725723A (en) * | 2005-06-15 | 2006-01-25 | 杭州华为三康技术有限公司 | Method and system for increasing safety of VPN user |
| CN1874226A (en) * | 2006-06-26 | 2006-12-06 | 杭州华为三康技术有限公司 | Terminal access method and system |
| CN101087236A (en) * | 2007-08-09 | 2007-12-12 | 杭州华三通信技术有限公司 | VPN access method and device |
| CN101453527A (en) * | 2007-11-30 | 2009-06-10 | 华为技术有限公司 | Method, network system and network appliance for dynamic policy conversion |
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