CN111010705A - Method and system for synchronizing addresses of wireless access point and wireless controller in cascading scene - Google Patents
Method and system for synchronizing addresses of wireless access point and wireless controller in cascading scene Download PDFInfo
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- H—ELECTRICITY
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- 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 that the expanded wireless access point in the cascading scene cannot acquire the address of the wireless controller in a dynamic mode and is online, so that the labor cost is increased, and the deployment efficiency is low. The gateway wireless access point automatically discovers the wireless controller in a dynamic mode and enables the wireless controller to be online, other extended wireless access points synchronize the address of the wireless controller to the extended wireless access points through the unicast connection channel by establishing the unicast connection channel between the gateway wireless access points, and the extended wireless access points enable the wireless controller to be online 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
The WLAN (wireless local area network) provides a wireless connection service of the local area network, the AP (wireless access point) is a wireless access device in the wireless local area network and is responsible for accessing the terminal and providing wireless services, and the AC (wireless controller) is a wireless control device and is responsible for managing all APs in the network and configuring and managing functions such as wireless services of the APs.
In a traditional networking environment, an AC is deployed at a cloud or a management center, an AP is deployed in a wireless access scene, the AP is accessed into the same local area network environment through a switch, and then is accessed into an upper end network through gateway equipment, so that the AP is clustered deployed and managed by the AC. For the AP, the access AC may be implemented in a static manner or in a dynamic manner: the static method refers to connection by an AC address configured in an AP, and the dynamic method refers to connection by discovering an AC address by DHCP, DNS, broadcast, multicast, or the like. When a network is actually deployed, in consideration of deployment efficiency, an AP generally adopts zero configuration to perform online and discovers an AC address from network deployment in a dynamic manner to perform connection.
In a conventional deployment environment of each AP cluster network, a switch and a gateway device need to be configured. For small network environments such as banking outlets, the number of APs deployed at each outlet is usually only a few, and if a traditional network deployment manner is adopted, gateway devices must be deployed, which increases the cost. Therefore, for this type of scenario, a new cascade method is adopted to perform network deployment, and no gateway device is deployed any more, that is, one AP is used as a gateway AP and works in a routing mode to provide gateway and wireless access functions, and other APs in the deployment environment are used as extended APs and work in a bridge mode to connect with the LAN side of the gateway AP to form a local area network to provide wireless access functions, as shown in fig. 1.
In a new cascade networking environment, the gateway AP can still acquire the AC address in a dynamic manner and bring it online, but since the extended AP is deployed in the LAN on the LAN side of the gateway AP, the AC address cannot be acquired in a dynamic manner and brought online. Therefore, the extended AP can only be brought online by statically configuring the AC address, which increases labor cost and reduces deployment efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method and the system for synchronizing the addresses of the wireless access point and the wireless controller in the cascading scene are provided, and the problems that the labor cost is increased and the deployment efficiency is low due to the fact that the extended wireless access point cannot acquire the address of the wireless controller in a dynamic mode and is on line in the cascading scene are solved.
In one aspect, an embodiment of the present invention provides an address synchronization system for a wireless access point and a wireless controller in a cascading scenario, including multiple wireless access points; one wireless access point in 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 extended wireless access points working in a bridge mode, and the gateway wireless access point is connected with each extended wireless access point in a cascading mode;
the extended wireless access point is used for establishing connection with the gateway wireless access point, registering local information to the gateway wireless access point, and adopting the address to carry out online after acquiring the address of the wireless controller synchronized with the gateway wireless access point;
the gateway wireless access point is used for managing the online 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 offline state after the address of the wireless controller is found and the wireless controller is successfully online.
As a further optimization, the gateway wireless access point comprises:
the notification module is used for periodically notifying a local area network where the gateway wireless access point is located of a message that the local area network is used as the gateway wireless access point;
the state management module is used for managing the online state of each extended 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 which is in the non-online state after the address of the wireless controller is found and the wireless controller is successfully online.
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 the address of the wireless controller is synchronized to the extended wireless access point which is in the non-on-line state, the on-line state of the extended wireless access point is set to be on-line; after receiving the on-line result message fed back by the extended wireless access point, judging and processing according to the on-line result message: if the online is successful, updating the online state of the extended wireless access point to be online, and if the online fails, updating the online state of the extended wireless access point to be offline.
As a further optimization, the extended wireless access point comprises:
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 with the gateway wireless access point;
and the online module is used for performing online according to the address of the wireless controller and feeding back an online result message to the wireless access point of the gateway.
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 establish connection.
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. establishing connection between the extended wireless access point and the gateway wireless access point, and registering local information to the gateway wireless access point;
b. the gateway wireless access point manages the online state of each expansion wireless access point registered by the gateway wireless access point;
c. after finding out the address of the wireless controller and successfully uploading, the gateway wireless access point synchronizes the address of the wireless controller to the extended wireless access point which is in an offline state;
d. and after the extended wireless access point acquires the address of the wireless controller synchronized with the gateway wireless access point, the extended wireless access point adopts the address 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;
the gateway wireless access point periodically informs a local area network where the gateway wireless access point is located of a message that the local area network is used as the gateway wireless access point through broadcasting or multicasting;
after receiving the notification message of the gateway wireless access point, if the extended wireless access point judges that the local computer is not registered in the gateway wireless access point, the extended wireless access point establishes connection with the gateway wireless access point in a unicast mode and then registers local computer information with the gateway wireless access point.
As a further optimization, in step b, the managing, by the gateway wireless access point, the online states of the extension wireless access points registered with the gateway wireless access point specifically includes:
the method comprises the steps that a gateway wireless access point establishes an extended wireless access point information list, after registration information of the extended wireless access point is received, the extended wireless access point information is added into the extended wireless access point information list, and the online state of the extended wireless access point is initialized to be offline;
when the address of the wireless controller is synchronized to the extended wireless access point which is in the non-on-line state, the on-line state of the extended wireless access point is set to be on-line;
after receiving the on-line result message fed back by the extended wireless access point, judging and processing according to the on-line result message: if the online is successful, updating the online state of the extended wireless access point to be online, and if the online fails, updating the online state of the extended wireless access point to be offline.
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 extended wireless access points in the extended wireless access point information list, and when the state of the extended wireless access point information is offline, the gateway wireless access point respectively sends the address synchronization message of the wireless controller to the extended wireless access points in the offline state 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 invention has the beneficial effects that:
aiming at the wireless cascade networking environment, a gateway wireless access point automatically discovers a wireless controller in a dynamic mode and enables the wireless controller to be on line, other extended wireless access points synchronize the address of the wireless controller to the extended wireless access points through unicast connection channels by establishing unicast connection channels between the other extended wireless access points and the gateway wireless access point, and the extended wireless access points enable the wireless controller to be on line according to the address information of the synchronized wireless controller. The address synchronization scheme of the invention is automatically completed by the system, thereby solving the problem that the on-line can be realized only by statically configuring the address of the wireless controller in the traditional cascade networking environment. Under the scene, when the network deployment or the network environment is changed, independent configuration is not needed to be carried out on each wireless access point, the normal online can be realized by realizing zero configuration information, and the deployment cost and the operation and maintenance cost of the product 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 according to an embodiment of the present invention;
fig. 3 is a block diagram of a gateway AP in the embodiment of the present invention;
fig. 4 is a flowchart illustrating interaction between a gateway AP and an extended AP according to 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) in a cascading networking scene, and solves the problems that in the cascading scene, an extended AP cannot acquire the address of the AC in a dynamic mode and is on-line, so that the labor cost is increased, and the deployment efficiency is low.
Example (b):
in this embodiment, for example, a cascading manner is adopted for network deployment in a bank outlet, multiple APs are adopted for deployment, and no gateway device is deployed, but one of the APs is used as a gateway AP, and operates in a routing mode to provide a gateway and a wireless access function; and other APs are used as extension APs, work in a bridge mode, are connected with the LAN side of the gateway AP to form a local area network and provide a wireless access function.
The extended AP is used for establishing connection with the gateway AP, registering local information to the gateway AP, and adopting the address to carry out online after acquiring the AC address synchronized with the gateway AP;
and the gateway AP is used for managing the on-line state of each expansion AP registered to the gateway AP, and synchronizing the AC address to the expansion AP in the off-line state after the AC address is found and the AC address is successfully on-line.
In a specific implementation, the structure of the extended AP is shown in fig. 2, and includes: the system 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 an AC address synchronized with the gateway AP;
and the online module is used for performing online according to the AC address and feeding an online result message back to the gateway AP.
The structure of the gateway AP is shown in fig. 3, and includes: the system comprises a notification module, a state management module and an address synchronization module;
the notification module is used for periodically notifying the local area network where the gateway AP is positioned of a message which is used as the gateway AP by the local area network; the local area network where the gateway AP is located is the network on the LAN side where the gateway AP is located;
the state management module is used for managing the online state of each expansion AP registered to the gateway AP;
and the address synchronization module is used for periodically synchronizing the AC address to the extended AP in the non-online state after the AC address is found and the AC address is successfully online.
In addition, after the extended AP establishes connection with the gateway AP, in order to keep long connection between the extended AP and the gateway AP, a first keep-alive module is also arranged in the gateway AP, and a second keep-alive module is also arranged in the extended 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, the connection keep-alive between the extended AP and the gateway AP may have two implementation schemes:
firstly, keep-alive information is sent to an extended AP by a gateway AP, and the extended AP responds to the keep-alive information; and secondly, the keep-alive information is sent to the gateway AP by the extended AP, and the gateway AP responds to the keep-alive information.
Fig. 4 shows an interaction flow between the extended AP and the gateway AP, which specifically includes:
1. the gateway AP sends an announcement message to the extended AP:
after the gateway AP is started, the gateway AP periodically a (for example, 10 seconds) sends a gateway information notification message to the LAN side network in a multicast or broadcast manner, and notifies the LAN side network of the gateway information of the local gateway; so as to ensure that the extended AP in the LAN side network establishes connection with the gateway AP as soon as possible.
2. The extended AP establishes connection with the gateway AP:
the extended AP receives the gateway information notification message, if the gateway AP is judged not to be registered, the gateway AP information is recorded, and the connection is established with the gateway AP in a unicast mode; if the gateway AP is registered, no processing is performed.
3. The extended AP registers local information with the gateway AP:
after establishing connection with the gateway AP, the extended AP sends local information registration information to the gateway AP through the established connection channel; in addition, after the unicast connection is established between the extended AP and the gateway AP, the extended AP and the gateway AP synchronously enter a keep-alive stage, and both sides send keep-alive messages through a periodic B (for example, 5 seconds) to ensure the normal network connection.
4. The gateway AP manages the state 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 be offline.
5. The gateway AP synchronizes AC address information to the extended AP:
when the gateway AP is successfully on-line with the AC, the gateway AP periodically C (for example, 3 seconds) checks the states of all the extended AP information in the extended AP information list, and when the state of the extended AP information is "not on-line", the gateway AP sends an AC address synchronization message to the extended AP whose state is "not on-line" through the established unicast connection channel, and sets the state to "on-line".
6. The extended AP adopts the received AC address information to be on-line and feeds back the on-line result:
and the extended AP receives the AC address synchronization message, uses the AC address to perform an online process, and sends an AC online result message to the gateway AP after the online process is finished.
7. The gateway AP updates the state of the extended AP according to the online result:
the gateway AP receives the AC online result message of the extended AP, and if the online is successful, the state of the extended AP information is updated to be 'online'; and if the on-line fails, updating the state of the extended AP information to be 'not on-line'.
Claims (10)
1. The system for synchronizing the addresses of the wireless access points and the wireless controller under the cascading scene comprises a plurality of wireless access points; it is characterized in that the preparation method is characterized in that,
one wireless access point in 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 extended wireless access points working in a bridge mode, and the gateway wireless access point is connected with each extended wireless access point in a cascading mode;
the extended wireless access point is used for establishing connection with the gateway wireless access point, registering local information to the gateway wireless access point, and adopting the address to carry out online after acquiring the address of the wireless controller synchronized with the gateway wireless access point;
the gateway wireless access point is used for managing the online 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 offline state after the address of the wireless controller is found and the wireless controller is successfully online.
2. The system for synchronizing a wireless access point and a wireless controller address in a cascading scenario of claim 1,
the gateway wireless access point includes:
the notification module is used for periodically notifying a local area network where the gateway wireless access point is located of a message that the local area network is used as the gateway wireless access point;
the state management module is used for managing the online state of each extended 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 which is in the non-online state after the address of the wireless controller is found and the wireless controller is successfully online.
3. The system for synchronizing a wireless access point and a wireless controller address in a cascading scenario of claim 2,
the state management module is specifically used for 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 the address of the wireless controller is synchronized to the extended wireless access point which is in the non-on-line state, the on-line state of the extended wireless access point is set to be on-line; after receiving the on-line result message fed back by the extended wireless access point, judging and processing according to the on-line result message: if the online is successful, updating the online state of the extended wireless access point to be online, and if the online fails, updating the online state of the extended wireless access point to be offline.
4. The system for synchronizing wireless access points and wireless controller addresses in a cascading scenario of claim 1, wherein the extended wireless access point comprises:
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 with the gateway wireless access point;
and the online module is used for performing online according to the address of the wireless controller and feeding back an online result message to the wireless access point of the gateway.
5. The system for synchronizing the addresses of the wireless access points and the wireless controllers in the cascading scenario according to any one of claims 1 to 4, 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 establish connection.
6. The method for synchronizing the addresses of the wireless access point and the wireless controller under the cascade scene is characterized by comprising the following steps:
a. establishing connection between the extended wireless access point and the gateway wireless access point, and registering local information to the gateway wireless access point;
b. the gateway wireless access point manages the online state of each expansion wireless access point registered by the gateway wireless access point;
c. after finding out the address of the wireless controller and successfully uploading, the gateway wireless access point synchronizes the address of the wireless controller to the extended wireless access point which is in an offline state;
d. and after the extended wireless access point acquires the address of the wireless controller synchronized with the gateway wireless access point, the extended wireless access point adopts the address to carry out online.
7. The method for synchronizing wireless access points and wireless controller addresses in a cascading scenario according to claim 6,
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;
the gateway wireless access point periodically informs a local area network where the gateway wireless access point is located of a message that the local area network is used as the gateway wireless access point through broadcasting or multicasting;
after receiving the notification message of the gateway wireless access point, if the extended wireless access point judges that the local computer is not registered in the gateway wireless access point, the extended wireless access point establishes connection with the gateway wireless access point in a unicast mode and then registers local computer information with the gateway wireless access point.
8. The method for synchronizing wireless access points and wireless controller addresses in a cascading scenario according to claim 6,
in step b, the step of managing the online state of each extended wireless access point registered by the gateway wireless access point specifically includes:
the method comprises the steps that a gateway wireless access point establishes an extended wireless access point information list, after registration information of the extended wireless access point is received, the extended wireless access point information is added into the extended wireless access point information list, and the online state of the extended wireless access point is initialized to be offline;
when the address of the wireless controller is synchronized to the extended wireless access point which is in the non-on-line state, the on-line state of the extended wireless access point is set to be on-line;
after receiving the on-line result message fed back by the extended wireless access point, judging and processing according to the on-line result message: if the online is successful, updating the online state of the extended wireless access point to be online, and if the online fails, updating the online state of the extended wireless access point to be offline.
9. The method for synchronizing wireless access points and wireless controller addresses in a cascading scenario according to claim 6,
in step c, the gateway wireless access point synchronizes the address of the wireless controller to the extended wireless access point in the non-online state, which specifically includes:
the gateway wireless access point periodically checks the states of all the extended wireless access points in the extended wireless access point information list, and when the state of the extended wireless access point information is offline, the gateway wireless access point respectively sends the address synchronization message of the wireless controller to the extended wireless access points in the offline state through the established unicast connection channel.
10. The method for synchronizing the addresses of the wireless access point and the wireless controller in the cascade scenario of any one of claims 6 to 9,
step a also includes: 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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