CN111010705B - Method and system for synchronizing wireless access point and wireless controller address in cascading scene - Google Patents
Method and system for synchronizing wireless access point and wireless controller address in cascading scene Download PDFInfo
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- CN111010705B CN111010705B CN201911355900.7A CN201911355900A CN111010705B CN 111010705 B CN111010705 B CN 111010705B CN 201911355900 A CN201911355900 A CN 201911355900A CN 111010705 B CN111010705 B CN 111010705B
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 12
- 238000005457 optimization Methods 0.000 description 8
- 230000006855 networking Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
Abstract
The invention relates to a wireless local area network technology, discloses a method and a system for synchronizing addresses of a wireless access point and a wireless controller in a cascading scene, and solves the problems of increased labor cost and low deployment efficiency caused by the fact that an extended wireless access point in the cascading scene cannot acquire the address of the wireless controller in a dynamic mode and go on line. In the invention, the gateway wireless access point automatically discovers the wireless controller in a dynamic mode and is on line, and other expansion wireless access points establish a unicast connection channel with the gateway wireless access point, and the gateway wireless access point synchronizes the address of the wireless controller to the expansion wireless access point through the unicast connection channel, and the expansion wireless access point is on line according to the address information of the synchronized wireless controller.
Description
Technical Field
The invention relates to a wireless local area network technology, in particular to a method and a system for synchronizing addresses of a wireless access point and a wireless controller in a cascading scene.
Background
WLAN (wireless local area network) provides a wireless connection service of a local area network, an AP (wireless access point) is a wireless access device in the wireless local area network, and is responsible for accessing a terminal and providing wireless services, and an AC (wireless controller) is a wireless control device, and is responsible for managing all APs in the network, and performing configuration management on functions such as wireless services of the APs.
In the traditional networking environment, the AC is deployed in a cloud or management center, the AP is deployed in a wireless access scene, the AP accesses the same local area network environment through a switch, and then accesses an upper network through gateway equipment, so that the clustered deployment and management of the AP by the AC are realized. For an AP, access to an AC may be achieved either statically or dynamically: the static mode refers to connection through an AC address configured on an AP, and the dynamic mode refers to discovery and connection of an AC address through DHCP, DNS, broadcast, multicast, and the like. In actual deployment of the network, the AP typically uses zero configuration for online and discovers AC addresses from the network deployment for connection in a dynamic manner, taking into account deployment efficiency.
In a conventional per-AP cluster network deployment environment, switches and gateway devices need to be configured. For small network environments such as banking sites, the number of APs deployed at each site is usually only a few, and if a traditional network deployment mode is adopted, gateway equipment must be deployed, which tends to increase cost. Therefore, for this type of scenario, a new cascade mode is adopted to perform network deployment, and no gateway device is deployed, that is, one AP is used as a gateway AP, works in a routing mode to provide a gateway and a wireless access function, and other APs in the deployment environment are used as extended APs, work in a bridge mode, and are connected with the LAN side of the gateway AP to form a local area network, so as to provide a wireless access function, as shown in fig. 1.
Under the new cascade networking environment, the gateway AP can still acquire the AC address in a dynamic mode and be on line, but because the extension AP is deployed in the LAN side local area network of the gateway AP, the AC address can not be acquired in the dynamic mode and be on line. Therefore, the extended AP can only be brought online by statically configuring the AC address, increasing labor costs, and deployment inefficiency.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the method and the system for synchronizing the addresses of the wireless access points and the wireless controllers in the cascading scene are provided, and the problems that the labor cost is increased and the deployment efficiency is low because the addresses of the wireless controllers cannot be acquired and are online in a dynamic mode by the extended wireless access points in the cascading scene are solved.
In one aspect, an embodiment of the present invention provides a system for synchronizing addresses of a wireless access point and a wireless controller in a cascade scenario, including a plurality of wireless access points; one wireless access point of the plurality of wireless access points is used as a gateway wireless access point working in a routing mode, other wireless access points are used as expansion wireless access points working in a bridge mode, and the gateway wireless access points are connected with the expansion wireless access points in a cascading mode;
the extended wireless access point is used for establishing connection with the gateway wireless access point and registering local information to the gateway wireless access point, and after the address of the wireless controller synchronized with the gateway wireless access point is acquired, the address is adopted for online;
the gateway wireless access point is used for managing the uplink state of each expansion wireless access point registered to the gateway wireless access point, and synchronizing the address of the wireless controller to the expansion wireless access point in the non-online state after the address of the wireless controller is found and the online is successful.
As a further optimization, the gateway wireless access point includes:
the notification module is used for periodically notifying the local area network where the gateway wireless access point is located as a message of the gateway wireless access point;
the state management module is used for managing the uploading state of each expansion wireless access point registered to the gateway wireless access point;
and the address synchronization module is used for periodically synchronizing the address of the wireless controller to the extended wireless access point in the offline state after the address of the wireless controller is found and the online is successful.
As a further optimization, the state management module is specifically configured to,
establishing an extended wireless access point information list, adding the extended wireless access point information into the extended wireless access point information list after receiving registration information of the extended wireless access point, and initializing the online state of the extended wireless access point to be offline; when synchronizing the address of the wireless controller to the extended wireless access point in the non-online state, setting the online state of the extended wireless access point to be in the online state; after receiving the uplink result message fed back by the extended wireless access point, judging according to the uplink result message: if the line is successful, the line-up state of the extended wireless access point is updated to be on line, and if the line-up is failed, the line-up state of the extended wireless access point is updated to be off line.
As a further optimization, the extended wireless access point includes:
the registration module is used for establishing connection with the gateway wireless access point according to the notification message and registering local information to the gateway wireless access point after receiving the notification message of the gateway wireless access point;
the address acquisition module is used for acquiring the address of the wireless controller synchronized by the gateway wireless access point;
and the online module is used for online according to the address of the wireless controller and feeding back an online result message to the gateway wireless access point.
As a further optimization, the gateway wireless access point further comprises a first keep-alive module, and the extended wireless access point further comprises a second keep-alive module; the first keep-alive module and the second keep-alive module are used for periodically maintaining connection through keep-alive messages after the gateway wireless access point and the extended wireless access point are connected.
On the other hand, the embodiment of the invention also provides a method for synchronizing the addresses of the wireless access point and the wireless controller in the cascading scene, which comprises the following steps:
a. the method comprises the steps that connection between an extended wireless access point and a gateway wireless access point is established, and local information is registered to the gateway wireless access point;
b. the gateway wireless access point manages the uplink state of each extended wireless access point registered to the gateway wireless access point;
c. after the gateway wireless access point finds the address of the wireless controller and the online is successful, synchronizing the address of the wireless controller to the extended wireless access point in the offline state;
d. and after the extended wireless access point acquires the address of the wireless controller synchronized by the gateway wireless access point, the address is adopted to carry out online.
As a further optimization, in the step a, the method for establishing connection between the extended wireless access point and the gateway wireless access point and registering the local information with the gateway wireless access point comprises the following steps of;
the gateway wireless access point periodically announces a message of the local machine serving as the gateway wireless access point to a local area network where the gateway wireless access point is located through broadcasting or multicasting;
after receiving the notification message of the gateway wireless access point, the extended wireless access point establishes connection with the gateway wireless access point in a unicast mode if judging that the local is not registered in the gateway wireless access point, and then registers local information with the gateway wireless access point.
As a further optimization, in the step b, the gateway wireless access point manages the uplink state of each extended wireless access point registered with the gateway wireless access point, and specifically includes:
the gateway wireless access point establishes an extended wireless access point information list, adds the extended wireless access point information into the extended wireless access point information list after receiving the registration information of the extended wireless access point, and initializes the online state of the extended wireless access point to be offline;
when synchronizing the address of the wireless controller to the extended wireless access point in the non-online state, setting the online state of the extended wireless access point to be in the online state;
after receiving the uplink result message fed back by the extended wireless access point, judging according to the uplink result message: if the line is successful, the line-up state of the extended wireless access point is updated to be on line, and if the line-up is failed, the line-up state of the extended wireless access point is updated to be off line.
As a further optimization, in step c, the gateway wireless access point synchronizes the address of the wireless controller to the extended wireless access point in the offline state, which specifically includes:
the gateway wireless access point periodically checks the states of all the expansion wireless access points in the expansion wireless access point information list, and when the state of the expansion wireless access point information is not online, the gateway wireless access point respectively sends address synchronous information of the wireless controller to the expansion wireless access points with the state of being not online through the established unicast connection channel.
As a further optimization, step a further comprises: after the extended wireless access point establishes connection with the gateway wireless access point, the connection is maintained periodically through keep-alive messages.
The beneficial effects of the invention are as follows:
for the wireless cascade networking environment, a gateway wireless access point automatically discovers and uploads a wireless controller in a dynamic mode, other expansion wireless access points establish unicast connection channels with the gateway wireless access point, the gateway wireless access point synchronizes the address of the wireless controller to the expansion wireless access point through the unicast connection channels, and the expansion wireless access point uploads the address information of the synchronized wireless controller. The address synchronization scheme of the invention is automatically completed by the system, so that the problem that the wireless controller address can only be statically configured to be on line in the traditional cascade networking environment is solved. In the scene, when the network deployment or the network environment is changed, each wireless access point is not required to be configured independently, zero configuration information can be normally on line, and the deployment cost and the operation and maintenance cost of products are reduced.
Drawings
Fig. 1 is a diagram of a wireless network architecture deployed in a cascaded manner;
fig. 2 is a block diagram of an extended AP in an embodiment of the present invention;
fig. 3 is a block diagram of a gateway AP according to an embodiment of the present invention;
fig. 4 is a flowchart of interaction between a gateway AP and an extended AP in an embodiment of the present invention.
Detailed Description
The invention provides a method and a system for synchronizing addresses of a wireless Access Point (AP) and a wireless controller (AC) aiming at a cascading networking scene, and solves the problems of increased labor cost and low deployment efficiency caused by the fact that an expansion AP cannot acquire the address of the AC in a dynamic mode and is on line in the cascading scene.
Examples:
in the embodiment, network deployment is exemplified by adopting a cascading mode in a banking website, a plurality of APs are adopted for deployment, gateway equipment is not deployed any more, one of the APs is used as a gateway AP, and the gateway AP works in a routing mode to provide gateway and wireless access functions; other APs are used as extension APs and work in a bridge mode and are connected with the LAN side of the gateway AP to form a local area network, so that a wireless access function is provided.
The extension AP is used for establishing connection with the gateway AP and registering local information to the gateway AP, and after the AC address synchronized with the gateway AP is acquired, the address is adopted for online;
and the gateway AP is used for managing the online state of each expansion AP registered to the gateway AP, and synchronizing the AC address to the expansion AP in the offline state after the AC address is found and the online is successful.
In a specific implementation, the structure of the extended AP is shown in fig. 2, and includes: the device comprises a registration module, an address acquisition module and an online module;
the registration module is used for establishing connection with the gateway AP according to the notification message and registering local information to the gateway AP after receiving the notification message of the gateway AP;
the address acquisition module is used for acquiring the AC address synchronized by the gateway AP;
and the online module is used for online according to the AC address and feeding back an online result message to the gateway AP.
The structure of the gateway AP is shown in fig. 3, which includes: the system comprises an announcement module, a state management module and an address synchronization module;
the notification module is used for periodically notifying a local network where the gateway AP is located as a message of the gateway AP; the local area network where the gateway AP is located is the network of the LAN side where the gateway AP is located;
the state management module is used for managing the uploading state of each extension AP registered to the gateway AP;
and the address synchronization module is used for periodically synchronizing the AC address to the expansion AP in the offline state after the AC address is found and the online is successful.
In addition, after the connection between the expansion AP and the gateway AP is established, in order to maintain long connection between the expansion AP and the gateway AP, a first keep-alive module is further arranged in the gateway AP, and a second keep-alive module is further arranged in the expansion AP; the first keep-alive module and the second keep-alive module periodically maintain the connection through keep-alive messages. It should be noted that, there may be two implementation schemes for connection keep-alive between the extended AP and the gateway AP:
firstly, keep-alive information is sent to an extension AP by a gateway AP, and the extension AP responds to the keep-alive information; secondly, the keep-alive information is sent to the gateway AP by the extension AP, and the gateway AP responds to the keep-alive information.
The interaction flow between the extended AP and the gateway AP is shown in fig. 4, and specifically includes:
1. the gateway AP sends an announcement message to the extension AP:
after the gateway AP is started, the gateway AP periodically sends a gateway information notification message to the LAN side network in a multicast or broadcast mode (for example, 10 seconds), and notifies the LAN side network of the gateway information serving as a gateway; so as to ensure that the extension AP in the LAN side network establishes connection with the gateway AP as soon as possible.
2. The extension AP establishes connection with the gateway AP:
the extension AP receives the gateway information notification message, if the extension AP determines that the extension AP is not registered to the gateway AP, the gateway AP information is recorded, and connection is established with the gateway AP in a unicast mode; if registered with the gateway AP, no processing is done.
3. The extension AP registers local information with the gateway AP:
after establishing connection with the gateway AP, the extension AP sends a local information registration message to the gateway AP through the established connection channel; in addition, after the unicast connection is established between the extension AP and the gateway AP, the extension AP and the gateway AP synchronously enter a keep-alive stage, both sides send keep-alive messages through a period B (for example, 5 seconds) to ensure the normal network connection, and when the keep-alive messages are not received in a plurality of continuous periods B, the abnormal network connection is indicated, and at the moment, the gateway AP and the extension AP are disconnected and enter the connection establishment stage again.
4. The gateway AP manages the status of the extended AP through the list:
after receiving the local information registration message of the extended AP, the gateway AP adds the extended AP into an extended AP information list, and initializes the state of the extended AP information to 'not on line'.
5. The gateway AP synchronizes AC address information to the extension AP:
when the gateway AP is on line successfully in the AC, the gateway AP periodically checks the status of all the extended AP information in the extended AP information list (for example, 3 seconds), and when the status of the extended AP information is "off line", sends AC address synchronization messages to the extended APs in the status of "off line" through the established unicast connection channels, and sets the status to "on line".
6. The expansion AP adopts the received AC address information to line and feeds back the line-up result:
and the extension AP receives the AC address synchronization message, uses the AC address to carry out an uplink flow, and sends an AC uplink result message to the gateway AP after the uplink flow is finished.
7. The gateway AP updates the state of the extended AP according to the uplink result:
the gateway AP receives the AC online result message of the extension AP, and if the online is successful, the state of the extension AP information is updated to be online; if the online fails, the status of the extended AP information is updated to "not online".
Claims (6)
1. A wireless access point and wireless controller address synchronization system in cascading scene includes a plurality of wireless access points; it is characterized in that the method comprises the steps of,
one wireless access point of the plurality of wireless access points is used as a gateway wireless access point working in a routing mode, other wireless access points are used as expansion wireless access points working in a bridge mode, and the gateway wireless access points are connected with the expansion wireless access points in a cascading mode;
the extended wireless access point is used for establishing connection with the gateway wireless access point and registering local information to the gateway wireless access point, and after the address of the wireless controller synchronized with the gateway wireless access point is acquired, the address is adopted for online;
the gateway wireless access point is used for managing the uploading state of each expansion wireless access point registered for the gateway wireless access point, and synchronizing the address of the wireless controller to the expansion wireless access point in the non-uploading state after finding the address of the wireless controller and uploading the address successfully;
the gateway wireless access point includes:
the notification module is used for periodically notifying the local area network where the gateway wireless access point is located as a message of the gateway wireless access point;
the state management module is used for managing the uploading state of each expansion wireless access point registered to the gateway wireless access point;
the address synchronization module is used for periodically synchronizing the address of the wireless controller to the extended wireless access point in the offline state through the unicast connection channel after the wireless controller address is found and the online is successful;
the extended wireless access point includes:
the registration module is used for establishing connection with the gateway wireless access point according to the notification message and registering local information to the gateway wireless access point after receiving the notification message of the gateway wireless access point;
the address acquisition module is used for acquiring the address of the wireless controller synchronized by the gateway wireless access point;
and the online module is used for online according to the address of the wireless controller and feeding back an online result message to the gateway wireless access point.
2. The system for synchronizing wireless access points and wireless controller addresses in a cascaded scenario of claim 1,
the state management module is specifically configured to establish an extended wireless access point information list, add the extended wireless access point information to the extended wireless access point information list after receiving registration information of the extended wireless access point, and initialize an online state of the extended wireless access point to be offline; when synchronizing the address of the wireless controller to the extended wireless access point in the non-online state, setting the online state of the extended wireless access point to be in the online state; after receiving the uplink result message fed back by the extended wireless access point, judging according to the uplink result message: if the line is successful, the line-up state of the extended wireless access point is updated to be on line, and if the line-up is failed, the line-up state of the extended wireless access point is updated to be off line.
3. The address synchronization system of a wireless access point and a wireless controller in a cascading scenario as claimed in claim 1 or 2, wherein the gateway wireless access point further comprises a first keep-alive module, and the extended wireless access point further comprises a second keep-alive module; the first keep-alive module and the second keep-alive module are used for periodically maintaining connection through keep-alive messages after the gateway wireless access point and the extended wireless access point are connected.
4. The address synchronization method for the wireless access point and the wireless controller in the cascading scene is characterized by comprising the following steps:
a. the method comprises the steps that connection between an extended wireless access point and a gateway wireless access point is established, and local information is registered to the gateway wireless access point;
b. the gateway wireless access point manages the uplink state of each extended wireless access point registered to the gateway wireless access point;
c. after the gateway wireless access point finds the address of the wireless controller and the online is successful, synchronizing the address of the wireless controller to the expansion wireless access point in the offline state through a unicast connection channel;
d. after the extended wireless access point acquires the address of the wireless controller synchronized by the gateway wireless access point, the address is adopted to carry out online;
in the step a, the method for establishing connection between the extended wireless access point and the gateway wireless access point and registering local information to the gateway wireless access point comprises the following steps of;
the gateway wireless access point periodically announces a message of the local machine serving as the gateway wireless access point to a local area network where the gateway wireless access point is located through broadcasting or multicasting;
after receiving the notification message of the gateway wireless access point, the extended wireless access point establishes connection with the gateway wireless access point in a unicast mode if judging that the local is not registered in the gateway wireless access point, and registers local information with the gateway wireless access point;
in step c, the gateway wireless access point synchronizes the address of the wireless controller to the extended wireless access point in the off-line state, which specifically includes:
the gateway wireless access point periodically checks the states of all the expansion wireless access points in the expansion wireless access point information list, and when the state of the expansion wireless access point information is not online, the gateway wireless access point respectively sends address synchronous information of the wireless controller to the expansion wireless access points with the state of being not online through the established unicast connection channel.
5. The method for synchronizing wireless access points and wireless controller addresses in a cascaded scenario of claim 4 wherein,
in step b, the gateway wireless access point manages the status of the uplink of each extended wireless access point registered to the gateway wireless access point, which specifically includes:
the gateway wireless access point establishes an extended wireless access point information list, adds the extended wireless access point information into the extended wireless access point information list after receiving the registration information of the extended wireless access point, and initializes the online state of the extended wireless access point to be offline;
when synchronizing the address of the wireless controller to the extended wireless access point in the non-online state, setting the online state of the extended wireless access point to be in the online state;
after receiving the uplink result message fed back by the extended wireless access point, judging according to the uplink result message: if the line is successful, the line-up state of the extended wireless access point is updated to be on line, and if the line-up is failed, the line-up state of the extended wireless access point is updated to be off line.
6. A method for synchronizing wireless access points and wireless controller addresses in a cascaded scenario as claimed in claim 4 or 5,
step a further comprises: after the extended wireless access point establishes connection with the gateway wireless access point, the connection is maintained periodically through keep-alive messages.
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