CN111277959B - Message forwarding method and device - Google Patents

Message forwarding method and device Download PDF

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Publication number
CN111277959B
CN111277959B CN202010048025.4A CN202010048025A CN111277959B CN 111277959 B CN111277959 B CN 111277959B CN 202010048025 A CN202010048025 A CN 202010048025A CN 111277959 B CN111277959 B CN 111277959B
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message
poe switch
multicast
broadcast message
broadcast
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CN111277959A (en
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吴清根
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New H3C Technologies Co Ltd Chengdu Branch
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New H3C Technologies Co Ltd Chengdu Branch
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Abstract

The application provides a message forwarding method and a device, wherein the method is applied to an AC and comprises the following steps: determining an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relation according to the corresponding relation between each AP associated with the AC and the Ethernet over Ethernet PoE switch directly connected with each AP, and taking the AP as a first AP; and aiming at each PoE switch, packaging the broadcast message or the multicast message into a CAPWAP tunnel message, sending the CAPWAP tunnel message to the first AP through the PoE switch, so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, sends the broadcast message or the multicast message out through a wireless radio frequency port of the first AP, sends the broadcast message or the multicast message to the PoE switch through an Ethernet port of the first AP, and sends the broadcast message or the multicast message to other APs except the first AP on the PoE switch. The load of the AC can be lightened.

Description

Message forwarding method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for forwarding a packet.
Background
In a Wireless Local Area Network (WLAN), an Access Controller (AC) manages an Access Point (AP) through a Control and Provisioning of Wireless Access Point (CAPWAP) tunnel, and the AP provides a Wireless Access service to the outside.
When the number of APs managed by the AC is increasing, for example, the number of APs reaches thousands, if the AC needs to send broadcast messages or multicast messages to the APs, the AC needs to copy the broadcast messages or multicast messages with the same number as the APs and send the broadcast messages or multicast messages to each AP one by one, which consumes a large amount of forwarding resources of the AC and causes a heavy load on the AC.
Disclosure of Invention
The application provides a message forwarding method and device, which can reduce the load of an AC.
The technical scheme provided by the application is as follows:
the application provides a message forwarding method, which is applied to an AC and comprises the following steps:
determining an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relation according to the obtained corresponding relation between each AP associated with the AC and each AP direct-connected Power over Ethernet (PoE) switch, wherein the AP to be received by the PoE switch is used as a first AP, and one PoE switch is directly connected with a plurality of APs;
and aiming at each PoE switch, packaging a broadcast message or a multicast message into a CAPWAP tunnel message, sending the CAPWAP tunnel message to the first AP through the PoE switch, so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, sends the broadcast message or the multicast message through a wireless radio frequency port of the first AP, sends the broadcast message or the multicast message to the PoE switch through an Ethernet port of the first AP, sends the broadcast message or the multicast message to other APs except the first AP on the PoE switch through the PoE switch, and sends the broadcast message or the multicast message through wireless radio frequency ports of the other APs.
The application also provides a message forwarding method, which is applied to the AP, and the method comprises the following steps:
receiving a CAPWAP tunnel message sent by an AC through a PoE switch directly connected with the AP, wherein the CAPWAP tunnel message is obtained by packaging a broadcast message or a multicast message and is sent through the PoE switch when the AC determines that the AP is the AP of the PoE switch to receive the broadcast message or the multicast message according to the acquired corresponding relation between each AP associated with the AC and the PoE switch connected with each AP;
decapsulating the CAPWAP tunnel message to obtain the broadcast message or the multicast message;
and the broadcast message or the multicast message is sent through a wireless radio frequency port of the PoE switch, the broadcast message or the multicast message is sent to the PoE switch through an Ethernet port, the PoE switch sends the broadcast message or the multicast message to other APs except the AP on the PoE switch, and the other APs send the broadcast message or the multicast message through the wireless radio frequency ports of the other APs.
The application provides a message forwarding device, the device is applied to the AC, the device includes:
a determining module, configured to determine, for each PoE switch in the correspondence, an AP to receive a broadcast message or a multicast message as a first AP according to the obtained correspondence between each AP associated with the AC and a PoE switch directly connected to each AP, where one PoE switch is directly connected to multiple APs;
the transmitting module is used for encapsulating a broadcast message or a multicast message into a CAPWAP tunnel message aiming at each PoE switch, transmitting the CAPWAP tunnel message to the first AP through the PoE switch so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, transmits the broadcast message or the multicast message through a wireless radio frequency port of the first AP, transmits the broadcast message or the multicast message to the PoE switch through an Ethernet port of the first AP, transmits the broadcast message or the multicast message to other APs except the first AP on the PoE switch through the PoE switch, and transmits the broadcast message or the multicast message through wireless radio frequency ports of the other APs.
The present application further provides a packet forwarding apparatus, where the apparatus is applied to an AP, and the apparatus includes:
a receiving module, configured to receive a CAPWAP tunnel message sent by an AC through a PoE switch directly connected to the AP, where the CAPWAP tunnel message is obtained by encapsulating a broadcast message or a multicast message and is sent by the PoE switch when the AC determines that the AP is an AP of the PoE switch that is to receive the broadcast message or the multicast message according to an obtained correspondence between each AP associated with the AC and the PoE switch connected to each AP;
a decapsulation module, configured to decapsulate the CAPWAP tunnel packet to obtain the broadcast packet or the multicast packet;
and the transmitting module is used for transmitting the broadcast message or the multicast message through a wireless radio frequency port of the transmitting module, transmitting the broadcast message or the multicast message to the PoE switch through an Ethernet port, transmitting the broadcast message or the multicast message to other APs except the AP on the PoE switch by the PoE switch, and transmitting the broadcast message or the multicast message through wireless radio frequency ports of the other APs.
According to the technical scheme, in the application, the AC determines an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relationship according to the acquired corresponding relationship between each AP associated with the AC and each PoE switch directly connected with the AP, the subsequent AC only sends the broadcast message or the multicast message to the AP determined for each PoE switch, and after the AP receives the broadcast message or the multicast message, the broadcast message or the multicast message is sent out through a wireless radio frequency port of the AC and is also sent to the PoE switch through an Ethernet port, so that the PoE switch sends the broadcast message or the multicast message out through the Ethernet port except the Ethernet port directly connected with the AP, and finally, other APs directly connected with the PoE switch receive the broadcast message or the multicast message. The forwarding mode of the broadcast message or the multicast message greatly reduces the consumption of the forwarding resources of the AC, thereby reducing the load of the AC.
Drawings
Fig. 1 is a schematic flowchart of a message forwarding method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of another packet forwarding method according to an embodiment of the present application;
fig. 3 is a WLAN networking diagram provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a message forwarding apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another packet forwarding device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
An embodiment of the present application provides a packet forwarding method, and as shown in fig. 1, the method is applied to an AC, and may include the following steps:
s11: and determining an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relation as a first AP according to the obtained corresponding relation between each AP associated with the AC and the PoE switch directly connected with each AP, wherein one PoE switch is directly connected with a plurality of APs.
In this step, the AC may obtain the correspondence between each AP associated with the AC and the PoE switch directly connected to each AP in the following manner:
acquiring a direct connection PoE switch corresponding to each AP from a Join Request (Join Request) message sent by each AP;
and establishing and storing a corresponding relation between each AP and the PoE switch directly connected with each AP.
It should be noted that, for any AP, the identification information, such as a bridge MAC address, of the PoE switch (supplying power to the AP) directly connected to the AP may be learned through a Link Layer Discovery Protocol (LLDP), and the identification information is added to a Join Request message and sent to an AC associated with the AP, for example, the identification information is added to a Vendor TLV field newly added in the Join Request message.
The above correspondence may be presented in the form of table entries, and each table entry may include a device number of the AP and a bridge MAC address of the PoE switch.
Further, in this step, according to the obtained correspondence between each AP associated with the AC and the PoE switches directly connected to each AP, determining an AP to receive a broadcast message or a multicast message for each PoE switch in the correspondence, specifically including:
and aiming at each PoE switch, determining any AP in the APs directly connected with the PoE switch in the corresponding relation as the AP to receive the broadcast message or the multicast message.
Of course, the present application is not limited to the above-described determination method, and other determination methods may be employed, for example, one AP is specified in advance on the AC side.
S12: and aiming at each PoE switch, packaging the broadcast message or the multicast message into a CAPWAP tunnel message, sending the CAPWAP tunnel message to the first AP through the PoE switch so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, sending the broadcast message or the multicast message through a wireless radio frequency port of the first AP, sending the broadcast message or the multicast message to the PoE switch through an Ethernet port of the first AP, sending the broadcast message or the multicast message to other APs except the first AP on the PoE switch by the PoE switch, and sending the broadcast message or the multicast message through wireless radio frequency ports of the other APs.
In this step, the AC only sends a broadcast message or a multicast message to the AP determined for each PoE switch, and after subsequent reception by the AP, the broadcast message or the multicast message is sent out through the wireless radio port of the AP and is further sent to the PoE switch through the ethernet port, so that the PoE switch sends out the broadcast message or the multicast message through the ethernet ports other than the ethernet port directly connected to the PoE switch, and finally, other APs directly connected to the PoE switch receive the broadcast message or the multicast message and send out the broadcast message or the multicast message. The forwarding mode of the broadcast message or the multicast message greatly reduces the consumption of the forwarding resources of the AC, thereby reducing the load of the AC.
An embodiment of the present application further provides a packet forwarding method, as shown in fig. 2, where the method is applied to an AP, and may include the following steps:
s21: and receiving a CAPWAP tunnel message sent by the PoE switch directly connected with the AC through the AP, wherein the CAPWAP tunnel message is obtained by packaging a broadcast message or a multicast message and is sent through the PoE switch when the AC determines that the AP is the AP of the PoE switch to receive the broadcast message or the multicast message according to the acquired correspondence between each AP associated with the AC and the PoE switch connected with each AP.
S22: and decapsulating the CAPWAP tunnel message to obtain a broadcast message or a multicast message.
S23: the method comprises the steps that a broadcast message or a multicast message is sent through a wireless radio frequency port of the AP, the broadcast message or the multicast message is sent to a PoE switch through an Ethernet port, the broadcast message or the multicast message is sent to other APs except the AP on the PoE switch through the PoE switch, and the broadcast message or the multicast message is sent through the wireless radio frequency ports of the other APs.
Further, the method further comprises:
and informing the PoE switch directly connected with the ACAP through the adding request message so that the AC establishes and stores the corresponding relation between the AP and the PoE switch directly connected with the AP.
The forwarding mode of the broadcast message or the multicast message greatly reduces the consumption of the forwarding resources of the AC, thereby reducing the load of the AC.
The above message forwarding method is described in detail with reference to the WLAN architecture diagram shown in fig. 3.
As shown in fig. 3, APs 11 to AP1n perform data interaction with AC1 through PoE switch 1, and APs 21 to AP2n perform data interaction with AC1 through PoE switch 2.
The following describes the above message forwarding method by taking the example that the AC1 sends broadcast messages to the APs 11 to AP1n, and the specific flow is as follows:
when the APs 11-AP 1n send join request messages to the AC1, they all carry the bridge MAC of the PoE switch 1, for example, MAC 1.
Subsequent AC1 creates and stores the correspondence between AP 11-AP 1n and PoE switch 1, where the correspondence may be presented in the form of entries, each entry includes the device number of the AP and the bridge MAC of the PoE switch, and for example, the first entry may include AP111 (i.e., the device number of AP 11) and MAC 1.
The AC1 selects any AP from the APs 11-AP 1n as the AP to receive the broadcast message on the PoE switch 1 according to the corresponding relationship, for example, selects AP 1.
When the AC1 needs to send the broadcast message, the broadcast message is encapsulated into a CAPWAP tunnel message and is sent to the AP1 through the PoE switch 1.
The AP1 decapsulates the CAPWAP tunnel packet to obtain a broadcast packet, and sends the broadcast packet through its own wireless rf port, so that a wireless device, such as a wireless client, on line at the AP1 can receive the broadcast packet.
AP1 also sends the broadcast message to PoE switch 1 through its ethernet port directly connected to PoE switch 1.
After receiving the broadcast message, the PoE switch 1 sends the broadcast message through other ethernet ports except the ethernet port directly connected to the AP1, and finally the AP12 to the AP1n can receive the broadcast message, and the AP12 to the AP1n send the broadcast message through their respective wireless radio frequency ports.
Based on the same inventive concept, an embodiment of the present application provides a packet forwarding apparatus, as shown in fig. 4, specifically including:
a determining module 41, configured to determine, according to the obtained corresponding relationship between each AP associated with the AC and the PoE switches directly connected to each AP, an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relationship, as a first AP, where one PoE switch is directly connected to multiple APs;
a sending module 42, configured to encapsulate a broadcast message or a multicast message into a wireless access point control and configuration protocol CAPWAP tunnel message for each PoE switch, and send the wireless access point control and configuration protocol CAPWAP tunnel message to the first AP through the PoE switch, so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, and sends the broadcast message or the multicast message through a wireless radio port of the first AP, and sends the broadcast message or the multicast message to the PoE switch through an ethernet port of the first AP, where the PoE switch sends the broadcast message or the multicast message to other APs except the first AP on the PoE switch, and the other APs send the broadcast message or the multicast message through wireless radio ports of the other APs.
Preferably, the determining module 41 is specifically configured to obtain a correspondence between each AP associated with the AC and a PoE switch directly connected to each AP in the following manner: acquiring a direct connection PoE switch corresponding to each AP from a join request message sent by each AP; and establishing and storing a corresponding relation between each AP and the PoE switch directly connected with each AP.
Preferably, the determining module 41 is specifically configured to: and aiming at each PoE switch, determining any AP in the APs directly connected with the PoE switch in the corresponding relation as the AP to receive the broadcast message or the multicast message.
Further, an embodiment of the present application further provides a packet forwarding apparatus, as shown in fig. 5, specifically including:
a receiving module 51, configured to receive a wireless access point control and configuration protocol CAPWAP tunnel message sent by an access controller AC through a PoE switch directly connected to the AP, where the CAPWAP tunnel message is obtained by encapsulating a broadcast message or a multicast message and is sent by the PoE switch when the AC determines that the AP is an AP of the PoE switch that is to receive the broadcast message or the multicast message according to an obtained correspondence between each AP associated with the AC and the PoE switch connected to each AP;
a decapsulation module 52, configured to decapsulate the CAPWAP tunnel packet to obtain the broadcast packet or the multicast packet;
a sending module 53, configured to send the broadcast message or the multicast message through a wireless radio port of the sending module, and send the broadcast message or the multicast message to the PoE switch through an ethernet port, where the PoE switch sends the broadcast message or the multicast message to other APs on the PoE switch except the AP, so that the other APs send the broadcast message or the multicast message through the wireless radio ports of the other APs.
Preferably, the apparatus further comprises:
a notifying module 54 (not shown in fig. 5) configured to notify the AC of the PoE switch directly connected to the AP through a join request packet, so that the AC creates and stores a corresponding relationship between the AP and the PoE switch directly connected to the AP.
In the application, the AC determines an AP to receive a broadcast message or a multicast message for each PoE switch in the correspondence according to the obtained correspondence between each AP associated with the AC and each PoE switch directly connected to the AP, and the subsequent AC only sends the broadcast message or the multicast message to the AP determined for each PoE switch, and after the AP receives the broadcast message or the multicast message, the broadcast message or the multicast message is sent out through a wireless radio port of the AC and is also sent to the PoE switch through an ethernet port, so that the PoE switch sends the broadcast message or the multicast message out through the ethernet port except the ethernet port directly connected to the AP, and finally, other APs directly connected to the PoE switch all receive the broadcast message or the multicast message. The forwarding mode of the broadcast message or the multicast message greatly reduces the consumption of the forwarding resources of the AC, thereby reducing the load of the AC.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A message forwarding method is applied to an Access Controller (AC), and the method comprises the following steps:
determining an AP to receive a broadcast message or a multicast message for each PoE switch in the corresponding relation according to the obtained corresponding relation between each access point AP associated with the AC and the Ethernet power over Ethernet (PoE) switch directly connected with each AP, wherein the AP is used as a first AP, and one PoE switch is directly connected with a plurality of APs;
and aiming at each PoE switch, packaging a broadcast message or a multicast message into a wireless access point control and configuration protocol CAPWAP tunnel message, sending the CAPWAP tunnel message to the first AP through the PoE switch, so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, sends the broadcast message or the multicast message through a wireless radio frequency port of the first AP, sends the broadcast message or the multicast message to the PoE switch through an Ethernet port of the first AP, sends the broadcast message or the multicast message to other APs except the first AP through the PoE switch, and sends the broadcast message or the multicast message through the wireless radio frequency ports of the other APs.
2. The method according to claim 1, wherein the correspondence between each AP associated with the AC and the PoE switch directly connected to each AP is obtained by:
acquiring a direct connection PoE switch corresponding to each AP from a join request message sent by each AP;
and establishing and storing a corresponding relation between each AP and the PoE switch directly connected with each AP.
3. The method according to claim 1, wherein determining, for each PoE switch in the correspondence, an AP to receive a broadcast message or a multicast message according to the obtained correspondence between each AP associated with the AC and a PoE switch directly connected to each AP, specifically includes:
and aiming at each PoE switch, determining any AP in the APs directly connected with the PoE switch in the corresponding relation as the AP to receive the broadcast message or the multicast message.
4. A message forwarding method is applied to an Access Point (AP), and is characterized by comprising the following steps:
receiving a wireless access point control and configuration protocol CAPWAP tunnel message sent by an Access Controller (AC) through an Ethernet power supply PoE switch directly connected with the AP, wherein the CAPWAP tunnel message is obtained by packaging a broadcast message or a multicast message and is sent through the PoE switch when the AC determines that the AP is the AP of the PoE switch to be received of the broadcast message or the multicast message according to the acquired corresponding relation between each AP associated with the AC and the PoE switch connected with each AP;
decapsulating the CAPWAP tunnel message to obtain the broadcast message or the multicast message;
and the broadcast message or the multicast message is sent through a wireless radio frequency port of the PoE switch, the broadcast message or the multicast message is sent to the PoE switch through an Ethernet port, the PoE switch sends the broadcast message or the multicast message to other APs except the AP on the PoE switch, and the other APs send the broadcast message or the multicast message through the wireless radio frequency ports of the other APs.
5. The method of claim 4, further comprising:
and informing the AC of the PoE switch directly connected with the AP through adding a request message so that the AC establishes and stores a corresponding relation between the AP and the PoE switch directly connected with the AP.
6. A message forwarding apparatus, wherein the apparatus is applied to an access controller AC, and the apparatus comprises:
a determining module, configured to determine, for each PoE switch in the correspondence, an AP to receive a broadcast message or a multicast message as a first AP according to the obtained correspondence between each access point AP associated with the AC and the PoE switch over ethernet directly connected to each AP, where one PoE switch is directly connected to multiple APs;
a sending module, configured to encapsulate a broadcast message or a multicast message into a wireless access point control and configuration protocol CAPWAP tunnel message for each PoE switch, and send the wireless access point control and configuration protocol CAPWAP tunnel message to the first AP through the PoE switch, so that the first AP decapsulates the CAPWAP tunnel message to obtain the broadcast message or the multicast message, and sends the broadcast message or the multicast message through a wireless radio port of the first AP, and sends the broadcast message or the multicast message to the PoE switch through an ethernet port of the first AP, and the PoE switch sends the broadcast message or the multicast message to other APs on the PoE switch except the first AP, so that the other APs send the broadcast message or the multicast message through wireless radio ports of the other APs.
7. The apparatus according to claim 6, wherein the determining module is specifically configured to obtain a correspondence between each AP associated with the AC and a PoE switch directly connected to each AP, in the following manner: acquiring a direct connection PoE switch corresponding to each AP from a join request message sent by each AP; and establishing and storing a corresponding relation between each AP and the PoE switch directly connected with each AP.
8. The apparatus of claim 6, wherein the determining module is specifically configured to: and aiming at each PoE switch, determining any AP in the APs directly connected with the PoE switch in the corresponding relation as the AP to receive the broadcast message or the multicast message.
9. A message forwarding device is applied to an Access Point (AP), and the device comprises:
a receiving module, configured to receive a wireless access point control and configuration protocol CAPWAP tunnel message sent by an access controller AC through an ethernet power over ethernet PoE switch directly connected to the AP, where the CAPWAP tunnel message is obtained by encapsulating a broadcast message or a multicast message and sent by the PoE switch when the AC determines that the AP is an AP of the PoE switch that is to receive the broadcast message or the multicast message according to an obtained correspondence between each AP associated with the AC and the PoE switch connected to each AP;
a decapsulation module, configured to decapsulate the CAPWAP tunnel packet to obtain the broadcast packet or the multicast packet;
and the transmitting module is used for transmitting the broadcast message or the multicast message through a wireless radio frequency port of the transmitting module, transmitting the broadcast message or the multicast message to the PoE switch through an Ethernet port, transmitting the broadcast message or the multicast message to other APs except the AP on the PoE switch by the PoE switch, and transmitting the broadcast message or the multicast message through wireless radio frequency ports of the other APs.
10. The apparatus of claim 9, further comprising:
and the notification module is used for notifying the AC of the PoE switch directly connected with the AP through adding a request message so that the AC establishes and stores a corresponding relationship between the AP and the PoE switch directly connected with the AP.
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US9609590B2 (en) * 2014-04-29 2017-03-28 Aruba Networks, Inc. Eco-friendly power over ethernet
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CN108055156B (en) * 2017-12-18 2021-11-16 迈普通信技术股份有限公司 AP management method and device
CN108093441B (en) * 2017-12-22 2021-03-02 新华三技术有限公司 Switching method and device of access controller
CN108712783B (en) * 2018-03-22 2021-01-12 新华三技术有限公司 CAPWAP tunnel establishment method and device
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