CN106301822B - Method, device and system for configuring AP - Google Patents

Method, device and system for configuring AP Download PDF

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Publication number
CN106301822B
CN106301822B CN201510250925.6A CN201510250925A CN106301822B CN 106301822 B CN106301822 B CN 106301822B CN 201510250925 A CN201510250925 A CN 201510250925A CN 106301822 B CN106301822 B CN 106301822B
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configuration
information
parameter
fingerprint
configuration information
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CN106301822A (en
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邓高亮
李月
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Alibaba Damo Institute Hangzhou Technology Co Ltd
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阿里巴巴集团控股有限公司
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Priority to PCT/CN2016/081217 priority patent/WO2016184317A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • 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
    • 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
    • H04L41/08—Configuration management of networks or network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0861—Network architectures or network communication protocols for network security for authentication of entities using biometrical features, e.g. fingerprint, retina-scan
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention provides a method, a device and a system for configuring an Access Point (AP), wherein the method comprises the following steps: after receiving a configuration request of an AP (access point), a cloud Access Controller (AC) requests a network management device and acquires configuration information aiming at the AP; and sending the acquired configuration information to the AP through a configuration response. In the invention, the management function of the AP is completed by the unified network management device, the configuration information of the AP is not required to be configured on all the ACs in the cloud AC cluster, and the configuration information of the AP is only required to be uniformly configured on the network management device and then issued to the AC associated with the AP, so that the configuration difficulty and the maintenance cost are reduced.

Description

Method, device and system for configuring AP
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of network communication technologies, and in particular, to a method, an apparatus, and a system for configuring an AP.
[ background of the invention ]
WLAN (virtual Local Area network) is mainly composed of an AC (Access controller) and an AP (Access Point), where the AC is responsible for managing and controlling the AP, and the AP provides a bridging function from a Wireless client to the Local Area network.
In the present day when the WLAN network is gradually becoming an independent network, cloud AC is a development trend of future AC, so-called cloud AC is to put AC management and control functions to the cloud end, that is, an AC cluster is deployed at the cloud end, and each AC in the AC cluster may be embodied as a virtual AC (vac). The APs may share the AC cluster. The architecture has the characteristics of low cost, easiness in management, virtualization, scalable network architecture and the like, is very convenient in wireless network transformation and capacity expansion, and can effectively reduce IT cost and network complexity.
Since each AP shares an AC cluster in the cloud, that is, it is uncertain which AC the AP is connected to, it is necessary to configure the AP on all ACs and store the configuration information of the AP. This approach is cumbersome, costly and prone to consistency issues, especially when modifying the AP configuration.
[ summary of the invention ]
In view of this, the present invention provides a method, an apparatus, and a system for configuring an AP, so as to reduce the configuration difficulty and the maintenance cost in a cloud AC environment.
The specific technical scheme is as follows:
the invention provides a method for configuring an Access Point (AP), which comprises the following steps:
after receiving a configuration request of an AP (access point), an AC (access controller) in a cloud AC cluster requests a network management device and acquires configuration information aiming at the AP;
and sending the acquired configuration information to the AP through a configuration response.
According to an optional embodiment of the present invention, the AC is allocated to the AP from the cloud AC cluster after the load splitter LB receives the discovery request packet of the AP.
According to an alternative embodiment of the invention, the method further comprises: the AC and the AP establish a control and configuration protocol CAPWAP tunnel of a wireless access point;
and the AC receives a configuration request of the AP through the CAPWAP tunnel.
According to an alternative embodiment of the invention, the method further comprises:
and after receiving the configuration updating information aiming at the AP from the network management device, the AC sends the configuration updating information to the AP.
According to an alternative embodiment of the invention, the method further comprises:
and the AC receives the operation information sent by the AP and sends the operation information to a network management device.
According to an optional embodiment of the invention, the AC maintains configuration information for the AP;
after the AC is disconnected with the AP and the connection is reestablished, if a configuration request of the AP is received, generating a configuration parameter fingerprint by using configuration information aiming at the AP and locally stored by the AC, judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request, and if so, returning indication information which does not need to be updated to the AP; and if the configuration information is inconsistent, sending the locally-saved configuration information aiming at the AP to the AP.
According to an optional embodiment of the present invention, the configuration parameter fingerprints include service subtype parameter fingerprints, and the service subtype parameter fingerprints are generated by dividing the configuration information of the AP into subtypes according to service types and then respectively using the configuration information of each subtype;
the judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request comprises: respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request;
and if the configuration information is inconsistent, sending the service subtype configuration information corresponding to the inconsistent service subtype parameter fingerprints in the locally stored configuration information for the AP to the AP.
According to an optional embodiment of the present invention, the configuration parameter fingerprint further includes a global service parameter fingerprint, and the global service parameter fingerprint is generated by using all service subtype parameter fingerprints, or directly using the configuration information of the AP;
before comparing whether the service subtype parameter fingerprints generated by the AC and the service subtype parameter fingerprints carried by the configuration request are consistent, the method further includes:
judging whether the global service parameter fingerprint generated by the AC is consistent with the global service parameter fingerprint carried by the configuration request, if so, executing the indication information which is not required to be configured and updated and returned to the AP; and if not, continuing to execute the step of respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request.
According to an alternative embodiment of the invention, the method further comprises:
the AC parses a configuration parameter fingerprint from a Vendor Specific Payload of the configuration request.
The invention also provides a method for configuring the access point AP, which comprises the following steps:
the method comprises the steps that a network management device receives a configuration request aiming at an AP (access point) sent by an AC (access controller) in a cloud AC cluster;
returning configuration information for the AP to the AC so that the AC sends the configuration information to the AP.
According to an alternative embodiment of the invention, the method further comprises:
the network management device records the association relationship between the AC and the AP;
and sending the configuration updating information aiming at the AP to the AC according to the association relation so that the AC can send the configuration updating information to the AP.
According to an alternative embodiment of the invention, the method further comprises:
and the network management device receives the running information of the AP reported by the AC.
The invention also provides a method for configuring the access point AP, which comprises the following steps:
after the AP is disconnected with an AC in a cloud AC cluster and the connection is reestablished, generating a configuration parameter fingerprint by using configuration information of the AP, and sending a configuration request containing the configuration parameter fingerprint to the AC;
and receiving indication information returned by the AC and not needing configuration updating or configuration information aiming at the AP.
According to an optional embodiment of the present invention, generating a configuration parameter fingerprint using the configuration information of the AP comprises:
and after the configuration information of the AP is divided into subtypes according to the service types, generating parameter fingerprints of each service subtype by using the configuration information of each subtype respectively.
According to an optional embodiment of the present invention, generating a configuration parameter fingerprint using the configuration information of the AP further comprises:
and generating a global service parameter fingerprint by using all the service subtype parameter fingerprints or directly using the configuration information of the AP.
According to an optional embodiment of the invention, the configuration parameter fingerprint is carried in a VendorSpecific Payload of the configuration request.
The invention also provides a device for configuring the AP, which is arranged on the AC in the cloud AC cluster, and comprises: a first interaction unit and a second interaction unit;
the first interaction unit is used for receiving a configuration request of the AP; sending the configuration information acquired by the second interactive unit to the AP through a configuration response;
and the second interaction unit is used for requesting and acquiring the configuration information aiming at the AP from a network management device after the first interaction unit receives the configuration request of the AP.
According to an optional embodiment of the present invention, the AC is allocated to the AP from the cloud AC cluster after the LB receives the discovery request packet of the AP.
According to an optional embodiment of the present invention, the apparatus comprises a channel establishing unit, configured to establish a CAPWAP tunnel between the AC and the AP;
and the first interaction unit receives a configuration request of the AP through the CAPWAP tunnel.
According to an optional implementation manner of the present invention, the second interaction unit is further configured to receive configuration update information of a network management device for the AP;
the first interaction unit is further configured to send the configuration update information to the AP.
According to an optional embodiment of the present invention, the first interaction unit is further configured to receive operation information sent by the AP;
and the second interaction unit is further configured to send the operation information to a network management device.
According to an alternative embodiment of the invention, the device further comprises:
a maintenance unit, configured to save configuration information for the AP;
the fingerprint processing unit is used for generating a configuration parameter fingerprint by using the configuration information aiming at the AP stored by the maintenance unit and judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request or not if the first interaction unit receives the configuration request of the AP after the AC is disconnected from the AP and the AP is reestablished;
the first interaction unit is further configured to return indication information that updating does not need to be configured to the AP if the judgment result of the fingerprint processing unit is consistent; and if the configuration information is inconsistent, sending the configuration information for the AP, which is saved by the maintenance unit, to the AP.
According to an optional embodiment of the invention, the configuration parameter fingerprint comprises a respective service subtype parameter fingerprint;
the fingerprint processing unit is specifically configured to generate each service subtype parameter fingerprint by using the configuration information of each subtype after dividing the configuration information of the AP into subtypes according to service types; respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request;
the first interaction unit is further configured to return indication information that updating does not need to be configured to the AP if the comparison result of the fingerprint processing unit is consistent; and if the configuration information is inconsistent, the configuration information of the service subtype corresponding to the inconsistent service subtype parameter fingerprint in the configuration information aiming at the AP and stored by the maintenance unit is sent to the AP.
According to an optional embodiment of the present invention, the configuration parameter fingerprint further comprises a global service parameter fingerprint;
the fingerprint processing unit is further configured to generate the global service parameter fingerprint by using all service subtype parameter fingerprints, or directly generate the global service parameter fingerprint by using the configuration information of the AP; before comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request, the method is further used for judging whether the global service parameter fingerprints generated by the AC are consistent with the global service parameter fingerprints carried by the configuration request;
the first interaction unit is further configured to, if the determination result of the fingerprint processing unit is consistent, execute the returning of the indication information that the updating is not required to be configured to the AP; and if not, continuing to compare whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request or not.
According to an alternative embodiment of the invention, the device further comprises:
and the analysis unit is used for analyzing the configuration parameter fingerprint from the Vendor Specific Payload of the configuration request and providing the configuration parameter fingerprint to the fingerprint processing unit.
The invention also provides a device for configuring the AP, which is arranged on the network management device and comprises:
the receiving unit is used for receiving a configuration request aiming at the AP and sent by the AC in the cloud AC cluster;
a sending unit, configured to return configuration information for the AP to the AC, so that the AC sends the configuration information to the AP.
According to an alternative embodiment of the invention, the device further comprises:
a recording unit, configured to record an association relationship between the AC and the AP;
the sending unit is further configured to send, according to the association relationship, configuration update information for the AP to the AC, so that the AC sends the configuration update information to the AP.
According to an optional implementation manner of the present invention, the receiving unit is further configured to receive the operation information of the AP reported by the AC.
The invention also provides a device for configuring the AP, which is arranged on the AP and comprises:
the fingerprint generation unit is used for generating configuration parameter fingerprints by using the configuration information of the AP after the AP is disconnected with the AC in the cloud AC cluster and the connection is reestablished;
a sending unit, configured to send a configuration request including the configuration parameter fingerprint to the AC;
a receiving unit, configured to receive indication information that is returned by the AC and does not need to be updated by configuration or configuration information for the AP.
According to an optional embodiment of the present invention, the fingerprint generating unit is specifically configured to generate each service subtype parameter fingerprint by using configuration information of each subtype after dividing configuration information of the AP into subtypes according to service types.
According to an optional embodiment of the present invention, the fingerprint generating unit is further configured to generate a global traffic parameter fingerprint using all traffic subtype parameter fingerprints or directly using the configuration information of the AP.
According to an optional embodiment of the present invention, the sending unit carries the configuration parameter fingerprint in a Vendor Specific Payload of the configuration request.
The invention also provides a system for configuring the AP, which comprises: the system comprises a network management device, a cloud AC cluster and an AP.
It can be seen from the above technical solutions that, in the present invention, the management function for the AP is completed by the unified network management device, and after receiving the configuration request of the AP, the AC requests and acquires the configuration information for the AP from the network management device, and returns the configuration information to the AP. In this way, the configuration information of the APs does not need to be configured on all the ACs in the cloud AC cluster, and the configuration information of the APs only needs to be uniformly configured on the network management device and then issued to the APs associated with the ACs, so that the configuration difficulty and the maintenance cost are reduced.
[ description of the drawings ]
FIG. 1 is a diagram of the system architecture upon which the present invention is based;
FIG. 2 is a flow chart of a method provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a format of a vendor specific payload provided by an embodiment of the present invention;
FIG. 4 is a block diagram of an apparatus disposed in an AC according to an embodiment of the present invention;
fig. 5 is a diagram illustrating a structure of a device installed in a network management device according to an embodiment of the present invention;
fig. 6 is a device disposed in an AP according to an embodiment of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The core idea of the invention is to extract the management function of the AC to the AP in the AC cluster, only reserve the control function of the AC to the AP, unify the management function of the AC to the AP to the network management device, thereby ensuring the global unification of the configuration of the AP.
Fig. 1 is a diagram of the architecture of a system on which the present invention is based, as shown in fig. 1, the system mainly comprising: cloud AC cluster, network management device, LB (load balancer) and AP. The network management device, the LB and the cloud AC cluster are arranged at the cloud end, the network management device, the LB and the cloud AC cluster can be located in the same server or different servers respectively, all ACs in the cloud AC cluster can be located in the same server or different servers respectively, or even different areas can be located, for example, some ACs are located in Beijing, some ACs are located in Shanghai, and the like. As a preferred embodiment, the cloud AC cluster and the LB may be deployed on virtual machines of a public cloud (the public cloud generally refers to a cloud environment provided by a service provider for a user based on a public network), where each AC in the cloud AC cluster exists in a form of a virtual AC (vAC), and the vAC is described in the following embodiments as an example. In addition, in order to improve reliability of the LB device, the LBs may exist in a cluster form, and load balancing may be implemented within the LB cluster.
The cloud terminal referred to in the embodiment of the invention refers to a software platform adopting an application virtualization technology, and various common software can be packaged in an independent virtualization environment through the platform. A cloud AC cluster is an AC software cluster in the virtualization environment, and each AC in the cluster exists in the form of virtualization software.
The network management device includes the following functions:
1) is responsible for managing the configuration of all APs. On one hand, a management interface facing a network manager is provided, the configuration information of the network manager to the AP is obtained through the management interface, and on the other hand, interfaces facing each vAC in the cloud AC cluster are provided.
2) And when receiving a configuration request for the AP sent by the vAC, returning the configuration information for the AP to the vAC.
3) And collecting the running information of the AP reported by the vAC.
4) And recording the association relation between the vAC and the AP, and sending the configuration updating information aiming at the AP to the vAC associated with the AP according to the association relation.
The vAC mainly includes the following functions:
1) and establishing connection with the AP, namely establishing a CAPWAP (control and configuration protocol of wireless access point) tunnel with the AP.
2) After receiving the configuration request of the AP, the AP requests and acquires configuration information for the AP from the network management apparatus, and sends the configuration information to the AP through a configuration response.
3) And collecting the running information on the AP and reporting the running information to the network management platform.
4) And sending the configuration updating information aiming at the AP from the network management device to the AP.
5) Configuration information for the AP is saved.
6) After the connection with the AP is disconnected and the connection is reestablished, if the configuration request of the AP is received, the configuration request which is locally stored by the vAC and aims at the AP is utilized, the configuration information which is locally stored and aims at the AP is utilized to generate a configuration parameter fingerprint, whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request is judged, and if the configuration parameter fingerprint is consistent with the configuration parameter fingerprint, indication information which does not need to be updated in configuration is returned to the AP; and if the configuration information is inconsistent, sending the configuration information which is locally saved and aims at the AP to the AP.
LB mainly comprises the following functions:
1) and acquiring relevant information, such as load information, version information and the like, of each vAC in the AC cluster at regular time. The LB may obtain information about each vmac in the AC cluster from the network management platform.
2) And receiving a discovery request message sent by the AP, and distributing vAC for the AP sending the discovery request message from the cloud AC cluster. The LB may assign the APs with ACs based on load balancing principles, and may further incorporate other factors, such as whether the AP has connected the vAC and failed the connection, the distance between the AP and the vAC, the software versions of the AP and the vAC, whether the AP and the vAC belong to the same operator, and so on.
3) Address information of the assigned AC is returned to the AP.
The AP mainly includes the following functions:
1) and sending a discovery request message to the LB.
2) And receiving vAC address information distributed by the LB for the AP, and requesting to establish connection to the vAC according to the address information, namely negotiating to establish the CAPWAP tunnel.
3) A configuration request is sent to the vmac after establishing a connection with the vmac.
4) And receiving the configuration information or the configuration update information sent by the vAC, and performing local configuration.
5) And reporting the operation information to the vAC, wherein the operation information can be reported to the vAC at regular time.
6) And after the connection with the vAC is disconnected and the connection is reestablished, generating a configuration parameter fingerprint by using the configuration information of the vAC, carrying the configuration parameter fingerprint in a configuration request, and sending the configuration parameter fingerprint to the vAC.
Fig. 2 is a flowchart of a method provided by an embodiment of the present invention, and as shown in fig. 2, the method may include the following steps:
after the AP is powered on and started, in 201, a discovery request message is sent to the LB.
In the embodiment of the invention, the address information of the LB can be pre-configured on the AP, and the AP sends a discovery request message to the LB according to the address information.
In addition to this method, there is also a preferable method that a domain name pointing to the LB is configured in advance on the AP, the domain name is analyzed to obtain address information of the LB, and a discovery request packet is sent to the LB. The method can solve the single point problem of the LB, that is, the domain name can point to the LB cluster, and the address information of the LB obtained by the resolution may be any LB which normally works in the LB cluster, or an LB which has a smaller load in the LB cluster (that is, load sharing can be realized in the LB cluster and the load sharing is controlled on the domain name resolution server), or an LB which is closest to the AP in the LB cluster, and the like.
In 202, LB allocates vAC from the cloud AC cluster to the AP according to a load sharing principle.
The relevant information of each vAC in the cloud AC cluster can be obtained regularly, the relevant information mainly comprises load information, version information and the like. When the LB acquires the relevant information of the vAC, each vAC can report the relevant information of the LB to the network management device at regular time, the network management device is responsible for managing each device in the network, and the LB acquires the relevant information of each vAC from the network management device at regular time. Of course, the LB may also obtain the relevant information directly from each vmac.
In this step, it may be preferable to allocate the vmac with a small current load to the AP according to a load balancing principle. Wherein the load information may include, but is not limited to: one or any combination of CPU utilization, memory utilization, bandwidth utilization and AP online rate. The upper rate of an AP refers to the ratio of the number of currently connected APs in the vAC to the number of APs that the vAC can accommodate. In addition to following load balancing principles, other principles may be combined, such as: preferentially distributing vAC closest to the AP for the AP; preferentially distributing vACs with consistent software versions for the APs; the APs are preferably assigned vmacs belonging to the same network operator.
In 203, the LB carries the address information of the assigned vAC in a discovery response message and returns it to the AP.
The AP parses the address information of the vAC from the discovery response message, and establishes a connection with the vAC according to the address information in 204, that is, establishes a CAPWAP tunnel. The process of establishing the CAPWAP tunnel with the vAC by the AP is not described in detail.
In 205, the AP sends a configuration request to the vmac.
In 206, the vAC sends a configuration request to the network management device. In the invention, the vAC only has the control function of the AP, namely the control of the CAPWAP tunnel between the AP and the vAC, and the management function is separated, and the management function is completed by a network management device, such as the configuration of the AP, the management of a wireless terminal and the like.
In 207, the network management device returns configuration information for the AP to the vAC via a configuration response.
The network management device provides a management interface for a network manager, and the network manager configures the AP through the management interface, that is, the network management device obtains configuration information for the AP through the management interface and stores and maintains the configuration information locally. When receiving a configuration request of the vAC for a certain AP, returning the configuration information for the AP to the vAC.
In this way, the configuration information of all APs is uniformly configured and maintained on the network management device, and only needs to be issued to the vmac accessed by the APs, and the configuration information of the APs does not need to be configured and maintained on all the vmacs. Obviously, on one hand, the complexity and the maintenance cost can be reduced, and on the other hand, global unification can be effectively ensured.
In 208, the vAC sends the configuration information for the AP to the AP, and the AP performs local configuration by using the configuration information, and the online is successful.
In addition, an association relationship between the vAC and the AP is maintained in the network management device, if the network administrator updates the configuration of the AP, the vAC associated with the AP can be known according to the association relationship, configuration update information is sent to the associated vAC, the vAC issues the configuration update information to the AP, and the AP updates the local configuration by using the configuration update information.
In 209, the AP reports the operation information to the associated vAC during operation.
After the CAPWAP tunnel is established between the AP and the vAC, the interaction between the AP and the vAC is carried out through the CAPWAP tunnel.
At 210, the vAC reports the AP operation information to the network management device so that the network manager can grasp the AP operation information through the management interface.
If the CAPWAP tunnel between the AP and the vAC is reestablished after being disconnected, a configuration request is sent to the vAC in 211. Since the vAC needs to know whether the AP configuration and the local configuration are consistent, if all the configuration information is reported to the vAC for comparison, the data volume of the configuration request is very large, and a preferred implementation is provided for the embodiment of the present invention, that is, the configuration request sent by the AP to the vAC carries the configuration parameter fingerprint.
In 212, the vAC compares whether the configuration parameter fingerprint carried by the configuration request is consistent with the configuration parameter fingerprint generated by using the locally stored configuration information for the AP, if so, 213 is executed to return indication information that no configuration update is needed to the AP. If not, execution 214 returns locally stored configuration information for the AP to the AP.
The configuration parameter fingerprints may include a global service parameter fingerprint and service subtype parameter fingerprints. The vAC and the AP adopt the same mode when generating the global service parameter fingerprint and each service subtype parameter fingerprint.
Specifically, the generation process of each business subtype parameter fingerprint may include:
the configuration information of the AP is firstly divided into subtypes according to the service types. For example, the configuration information of the AP is divided into subtypes such as radio frequency parameters, wireless service parameters, public network connection mode, security configuration parameters, and the like.
And then decomposing and utilizing the configuration information of each subtype to generate the service parameter fingerprint of each subtype by adopting a fingerprint algorithm. Wherein the fingerprint algorithm may employ an algorithm such as MD5, HASH, etc.
The global service parameter service fingerprint can be generated by using a fingerprint algorithm by using all service subtype parameter fingerprints, or can be generated by directly using the configuration information of the AP by using a fingerprint algorithm.
For example, the configuration information of the AP is divided into N sub-types according to the service type, the configuration information of each sub-type is identified as APPCFG _1 to APPCFG _ N, each type of configuration information is respectively calculated by MD5 algorithm to obtain 128-bit fingerprints, which are respectively identified as parameter fingerprints of each service sub-type and MD5_1 to MD5_ N, and then the MD5 algorithm is used to calculate the N128-bit fingerprints to obtain a 128-bit global service parameter fingerprint, which is identified as MD5_ 0. The AP carries MD5_0 and MD5_ 1-MD 5_ N in the configuration request and sends the configuration request to the vAC.
In the same way, the vmac generates a global traffic parameter fingerprint, identified as MD5_0 ', using locally stored configuration information for the AP, and each of the traffic subtype parameter fingerprints, identified as MD5_1 ' to MD5_ N '. Then, whether the global service parameter fingerprints are consistent or not is compared, that is, whether MD5_0 is consistent with MD5_ 0' is compared, if so, it is indicated that the configuration information of the AP is consistent with the configuration information of the AP stored by the vAC, and indication information that no configuration update is needed is returned to the AP. If not, the service subtype parameter fingerprints are respectively compared, namely MD5_1 is respectively compared with MD5_1 ', MD5_2 is compared with MD5_2 ', …, MD5_ N is compared with MD5_ N '. Only configuration information corresponding to inconsistent service subtype parameter fingerprints needs to be returned to the AP.
In addition to the above manner, the configuration parameter fingerprint may not include a global service parameter fingerprint, and only include each service subtype parameter fingerprint. And comparing the generated service subtype parameter fingerprints with the service subtype parameter fingerprints carried by the configuration request one by the VAC, and then returning configuration information corresponding to the inconsistent service subtype parameter fingerprints to the AP, wherein if the configuration information is consistent, the indication information which does not need to be updated is returned to the AP.
The configuration request may carry the configuration parameter fingerprint by adding a Vendor Specific Payload, for example, the format of which may be as shown in fig. 3. The Vendor Identifier field is used for identifying Vendor specific Payload, the ElementID field is used for distinguishing sub-attributes in the Vendor Identifier field, the global service parameter fingerprint field is used for carrying global service parameter fingerprints, and other fields respectively carry the service subtype parameter fingerprints.
Fig. 4 is a device structure diagram arranged in an AC according to an embodiment of the present invention, configured to complete a function of a vmac in the above method embodiment, where the AC is allocated to an AP from a cloud AC cluster after an LB receives a discovery request packet of the AP. As shown in fig. 4, the apparatus may include: the first interaction unit 01 and the second interaction unit 02 may further include a channel establishing unit 03, a maintenance unit 04, a fingerprint processing unit 05, and a parsing unit 06. The functions of the constituent units are as follows:
the first interaction unit 01 is responsible for interacting with the AP, and includes: receiving a configuration request of an AP; and sending the configuration information acquired by the second interactive unit 02 to the AP through a configuration response.
The second interaction unit 02 is responsible for interacting with the network management device, and includes: after receiving the configuration request of the AP, the first interaction unit 01 requests the network management apparatus and obtains configuration information for the AP.
The channel establishing unit 03 is responsible for establishing a CAPWAP tunnel between the AC and the AP, and the first interacting unit 01 receives a configuration request of the AP through the CAPWAP tunnel and issues configuration information to the AP.
If the network management device performs configuration update on the AP, the second interaction unit 02 receives configuration update information of the network management device for the AP, and the first interaction unit 01 sends the configuration update information to the AP.
The AP reports the operation information, the first interaction unit 01 receives the operation information sent by the AP, and the second interaction unit 02 sends the operation information to the network management device.
The maintenance unit 04 is responsible for maintaining the configuration information for the AP, and stores the configuration information for the AP. After the AC is disconnected from the AP and the connection is reestablished, if the first interaction unit 01 receives the configuration request from the AP, the fingerprint processing unit 05 generates a configuration parameter fingerprint by using the configuration information for the AP, which is stored by the maintenance unit 04, and determines whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request.
If the judgment result of the fingerprint processing unit 05 is consistent, the first interaction unit 01 returns indication information which does not need to be configured for updating to the AP; if not, the configuration information for the AP held by the maintenance unit 04 is transmitted to the AP.
The configuration parameter fingerprints may include service subtype parameter fingerprints and may further include global service parameter fingerprints.
For the case that the configuration parameter fingerprints only include the parameter fingerprints of the service subtypes, the fingerprint processing unit 05 divides the configuration information of the AP into subtypes according to the service types, and then respectively generates the parameter fingerprints of the service subtypes by using the configuration information of the subtypes; and respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request. The algorithms employed by the fingerprint processing unit 05 in generating fingerprints may include, but are not limited to: MD5 or HASH algorithm, etc.
If the comparison result of the fingerprint processing unit 05 is consistent, that is, the configuration information for the AP stored by the AP and the AC is consistent, the first interaction unit 01 returns indication information that updating is not required to be configured to the AP; if the configuration information is inconsistent with the service subtype parameter fingerprint stored in the maintenance unit 04, the first interaction unit 01 sends the service subtype configuration information corresponding to the inconsistent service subtype parameter fingerprint to the AP.
For the case that the configuration parameter fingerprints include the service subtype parameter fingerprints and the global service parameter fingerprint, after the fingerprint processing unit 05 generates the service subtype parameter fingerprints in the above manner, the fingerprint processing unit may generate the global service parameter fingerprint by using all the service subtype parameter fingerprints, or directly generate the global service parameter fingerprint by using the configuration information of the AP. Before comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request, further judging whether the global service parameter fingerprints generated by the AC are consistent with the global service parameter fingerprints carried by the configuration request.
If the judgment result of the fingerprint processing unit 05 is consistent, it indicates that the configuration information for the AP stored by the AP and the AC is consistent, and the first interaction unit 01 returns indication information that updating is not required to be configured to the AP. And if not, continuing to compare whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request or not.
Since the AP may carry the configuration parameter fingerprint in the Vendor Specific Payload of the configuration request when sending the configuration parameter fingerprint, the parsing unit 06 may parse the configuration parameter fingerprint from the Vendor Specific Payload of the configuration request, and provide the configuration parameter fingerprint to the fingerprint processing unit 05.
Fig. 5 is a structural diagram of a device installed in a network management device according to an embodiment of the present invention, and as shown in fig. 5, the device may include: a receiving unit 11 and a transmitting unit 12, and may further include a recording unit 13. The main functions of each component unit are as follows:
the receiving unit 11 is responsible for receiving a configuration request for an AP sent by an AC in the cloud AC cluster.
The transmitting unit 12 is responsible for returning configuration information for the AP to the AC so that the AC transmits the configuration information to the AP. The AP can configure locally using the configuration information.
In addition, the device has a management interface for a network manager, and the network manager can configure the AP through the management interface. The recording unit 13 is responsible for recording the association relationship between the AC and the AP, that is, the association relationship between the AC sending the configuration request and the AP to which the configuration request is directed. After the network administrator updates the configuration information of the AP through the management interface, the sending unit 12 may send the configuration update information for the AP to the AC according to the association relationship, so that the AC sends the configuration update information to the AP. The AP can perform local configuration update according to the configuration update information.
Since the AP sends the operation information to the AC during the operation process and the AC reports the operation information to the network management apparatus, the receiving unit 11 receives the operation information of the AP reported by the AC.
Fig. 6 is a device disposed in an AP according to an embodiment of the present invention, and as shown in fig. 6, the device may include: a fingerprint generating unit 21, a transmitting unit 22 and a receiving unit 23.
When the AP is powered on and started, the sending unit 22 will first send a discovery request message to the LB. The discovery request message may be sent to the LB according to a preconfigured IP address of the LB, or may be sent to the LB according to a preconfigured domain name pointing to the LB. The latter implementation mode is preferred, and this mode can configure multiple LBs to share the same domain name, and when the domain name server performs domain name resolution, it can return the address information of one of the LBs to the AP according to the load balancing policy.
Then, the receiving unit 23 receives the address information of the AC allocated by the LB to the AP, and the sending unit 22 requests the AC to establish a CAPWAP tunnel according to the address information of the AC. After the tunnel is established, the sending unit 22 may send a configuration request to the AC, and receive configuration information sent by the AC through the receiving unit 23, perform local configuration, and complete online.
After the AP is disconnected from the AC in the cloud AC cluster and reestablishes the connection, the fingerprint generation unit 21 may generate the configuration parameter fingerprint using the configuration information of the AP.
The sending unit 22 sends a configuration request containing configuration parameter fingerprints to the AC.
The receiving unit 23 receives indication information that the AC returns that no configuration update is required or configuration information for the AP.
Specifically, the fingerprint generating unit 21 may generate each traffic subtype parameter fingerprint by using the configuration information of each subtype after dividing the configuration information of the AP into subtypes by traffic types. The configuration request sent by the sending unit 22 may only carry the fingerprint of each service subtype parameter.
There is another implementation that the fingerprint generation unit 21 may generate a global traffic parameter fingerprint using all the traffic subtype parameter fingerprints or directly using the configuration information of the AP, in addition to generating each traffic subtype parameter fingerprint. The configuration request sent by the sending unit 22 carries the global service parameter fingerprint and each service subtype parameter fingerprint.
The sending unit 22 may carry the configuration parameter fingerprint in the Vendor Specific Payload of the configuration request when sending the configuration parameter fingerprint.
As can be seen from the above description, the method and apparatus provided by the present invention can have the following advantages:
1) in the invention, the management function of the AP is completed by the unified network management device, the configuration information of the AP is not required to be configured on all the ACs in the cloud AC cluster, and the configuration information of the AP is only required to be uniformly configured on the network management device and then issued to the AC associated with the AP, so that the configuration difficulty and the maintenance cost are reduced.
2) When the AP and the AC are disconnected and reconnected, generating a configuration parameter fingerprint containing each business subtype parameter fingerprint, sending the configuration parameter fingerprint to the AC, generating the configuration parameter fingerprint containing each business subtype parameter fingerprint by the AC by using the locally stored configuration information of the AP, comparing the configuration parameter fingerprint with the configuration parameter fingerprint sent by the AP, and if the configuration parameter fingerprint is consistent with the configuration parameter fingerprint sent by the AP, sending the configuration information to the AP by the AC; if the information is inconsistent with the service subtype parameter fingerprint, only the configuration information corresponding to the inconsistent service subtype parameter fingerprint needs to be issued to the AP for updating, so that the information amount issued to the AP is reduced, and the network flow is saved.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (19)

1. A method for configuring an Access Point (AP), the method comprising:
after receiving a configuration request of an AP (access point), an AC (access controller) in a cloud AC cluster requests a network management device and acquires configuration information aiming at the AP;
sending the acquired configuration information to the AP through a configuration response;
after receiving configuration update information aiming at the AP from a network management device, the AC sends the configuration update information to the AP, wherein the configuration update information is sent by the network management device according to the maintained association relationship between the AC and the AP;
the AC saves configuration information for the AP;
after the AC is disconnected with the AP and the connection is reestablished, if a configuration request of the AP is received, generating a configuration parameter fingerprint by using configuration information aiming at the AP and locally stored by the AC, judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request, and if so, returning indication information which does not need to be updated to the AP; and if the configuration information is inconsistent, sending the locally-saved configuration information aiming at the AP to the AP.
2. The method of claim 1, wherein the AC is distributed from the cloud AC cluster to the AP after a load splitter LB receives a discovery request packet of the AP.
3. The method according to claim 1 or 2, characterized in that the method further comprises: the AC and the AP establish a control and configuration protocol CAPWAP tunnel of a wireless access point;
and the AC receives a configuration request of the AP through the CAPWAP tunnel.
4. The method of claim 1, further comprising:
and the AC receives the operation information sent by the AP and sends the operation information to a network management device.
5. The method of claim 1, wherein the configuration parameter fingerprints include service subtype parameter fingerprints generated by dividing the configuration information of the AP into subtypes according to service types, and using the configuration information of each subtype;
the judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request comprises: respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request;
and if the configuration information is inconsistent, sending the service subtype configuration information corresponding to the inconsistent service subtype parameter fingerprints in the locally stored configuration information for the AP to the AP.
6. The method of claim 5, wherein the configuration parameter fingerprints further include a global traffic parameter fingerprint generated using all traffic subtype parameter fingerprints or directly using configuration information of the AP;
before comparing whether the service subtype parameter fingerprints generated by the AC and the service subtype parameter fingerprints carried by the configuration request are consistent, the method further includes:
judging whether the global service parameter fingerprint generated by the AC is consistent with the global service parameter fingerprint carried by the configuration request, if so, executing the indication information which is not required to be configured and updated and returned to the AP; and if not, continuing to execute the step of respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request.
7. The method of claim 1, 5 or 6, further comprising:
the AC parses a configuration parameter fingerprint from a Vendor Specific Payload of the configuration request.
8. A method for configuring an Access Point (AP), the method comprising:
the method comprises the steps that a network management device receives a configuration request aiming at an AP (access point) sent by an AC (access controller) in a cloud AC cluster;
returning configuration information for the AP to the AC so that the AC sends the configuration information to the AP;
the method further comprises the following steps:
the network management device records the association relationship between the AC and the AP;
sending configuration update information for the AP to the AC according to the association relation so that the AC can send the configuration update information to the AP;
the AC saves configuration information for the AP;
after the AC is disconnected with the AP and the connection is reestablished, if a configuration request of the AP is received, generating a configuration parameter fingerprint by using configuration information aiming at the AP and locally stored by the AC, judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request, and if so, returning indication information which does not need to be updated to the AP; and if the configuration information is inconsistent, sending the locally-saved configuration information aiming at the AP to the AP.
9. The method of claim 8, further comprising:
and the network management device receives the running information of the AP reported by the AC.
10. An apparatus for configuring an AP, the apparatus being disposed in an AC in a cloud AC cluster, the apparatus comprising: a first interaction unit and a second interaction unit;
the first interaction unit is used for receiving a configuration request of the AP; sending the configuration information acquired by the second interactive unit to the AP through a configuration response;
the second interaction unit is used for requesting a network management device and acquiring configuration information aiming at the AP after the first interaction unit receives the configuration request of the AP;
the second interaction unit is further configured to receive configuration update information of a network management device for the AP, where the configuration update information is sent by the network management device according to the maintained association relationship between the AC and the AP;
the first interaction unit is further configured to send the configuration update information to the AP;
a maintenance unit, configured to save configuration information for the AP;
the fingerprint processing unit is used for generating a configuration parameter fingerprint by using the configuration information aiming at the AP stored by the maintenance unit and judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request or not if the first interaction unit receives the configuration request of the AP after the AC is disconnected from the AP and the AP is reestablished;
the first interaction unit is further configured to return indication information that updating does not need to be configured to the AP if the judgment result of the fingerprint processing unit is consistent; and if the configuration information is inconsistent, sending the configuration information for the AP, which is saved by the maintenance unit, to the AP.
11. The apparatus of claim 10, wherein the AC is allocated to the AP from the cloud AC cluster after the LB receives the discovery request packet of the AP.
12. The apparatus of claim 10, wherein the means for establishing a CAPWAP tunnel between the AC and the AP is configured to establish a CAPWAP tunnel;
and the first interaction unit receives a configuration request of the AP through the CAPWAP tunnel.
13. The apparatus according to claim 10, wherein the first interacting unit is further configured to receive operation information sent by the AP;
and the second interaction unit is further configured to send the operation information to a network management device.
14. The apparatus of claim 10, wherein the configuration parameter fingerprint comprises a respective service subtype parameter fingerprint;
the fingerprint processing unit is specifically configured to generate each service subtype parameter fingerprint by using the configuration information of each subtype after dividing the configuration information of the AP into subtypes according to service types; respectively comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request;
the first interaction unit is further configured to return indication information that updating does not need to be configured to the AP if the comparison result of the fingerprint processing unit is consistent; and if the configuration information is inconsistent, the configuration information of the service subtype corresponding to the inconsistent service subtype parameter fingerprint in the configuration information aiming at the AP and stored by the maintenance unit is sent to the AP.
15. The apparatus of claim 14, wherein the configuration parameter fingerprint further comprises a global traffic parameter fingerprint;
the fingerprint processing unit is further configured to generate the global service parameter fingerprint by using all service subtype parameter fingerprints, or directly generate the global service parameter fingerprint by using the configuration information of the AP; before comparing whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request, the method is further used for judging whether the global service parameter fingerprints generated by the AC are consistent with the global service parameter fingerprints carried by the configuration request;
the first interaction unit is further configured to, if the determination result of the fingerprint processing unit is consistent, execute the returning of the indication information that the updating is not required to be configured to the AP; and if not, continuing to compare whether the service subtype parameter fingerprints generated by the AC are consistent with the service subtype parameter fingerprints carried by the configuration request or not.
16. The apparatus of claim 10, 14 or 15, further comprising:
and the analysis unit is used for analyzing the configuration parameter fingerprint from the Vendor Specific Payload of the configuration request and providing the configuration parameter fingerprint to the fingerprint processing unit.
17. An apparatus for configuring an AP, the apparatus being disposed in a network management apparatus, the apparatus comprising:
the receiving unit is used for receiving a configuration request aiming at the AP and sent by the AC in the cloud AC cluster;
a sending unit, configured to return configuration information for the AP to the AC, so that the AC sends the configuration information to the AP;
a recording unit, configured to record an association relationship between the AC and the AP;
the sending unit is further configured to send, according to the association relationship, configuration update information for the AP to the AC, so that the AC sends the configuration update information to the AP;
the AC saves configuration information for the AP;
after the AC is disconnected with the AP and the connection is reestablished, if a configuration request of the AP is received, generating a configuration parameter fingerprint by using configuration information aiming at the AP and locally stored by the AC, judging whether the generated configuration parameter fingerprint is consistent with the configuration parameter fingerprint carried by the configuration request, and if so, returning indication information which does not need to be updated to the AP; and if the configuration information is inconsistent, sending the locally-saved configuration information aiming at the AP to the AP.
18. The apparatus of claim 17, wherein the receiving unit is further configured to receive operation information of the AP reported by the AC.
19. A system for configuring an AP, the system comprising: the system comprises a network management device, a cloud AC cluster and an AP;
the network management apparatus comprising the apparatus of claim 17 or 18;
each AC in the cloud AC cluster comprises the apparatus of any of claims 10 to 15;
and the AP is used for sending a configuration request to the AC connected with the AP and receiving configuration information returned by the AC.
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