CN101640882B - Method and device for preventing flow from breaking - Google Patents
Method and device for preventing flow from breaking Download PDFInfo
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- CN101640882B CN101640882B CN2009101698607A CN200910169860A CN101640882B CN 101640882 B CN101640882 B CN 101640882B CN 2009101698607 A CN2009101698607 A CN 2009101698607A CN 200910169860 A CN200910169860 A CN 200910169860A CN 101640882 B CN101640882 B CN 101640882B
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Abstract
The invention discloses a method for preventing a flow from breaking, comprising the following steps: when determining that a wireless terminal roams to the equipment, roamed wireless control equipment sends an MAC address of the wireless terminal to a two-layer exchange port on exchange equipment corresponding to the roamed wireless control equipment; the exchange equipment stores a corresponding relationship of the two-layer exchange port corresponding to the roamed wireless control equipment and the MAC address of the wireless terminal; and the exchange equipment sends the flow to the wireless terminal through the two-layer exchange port according to the MAC address of the wireless terminal. In the invention, when a Station finishes roaming in AC, AC equipment replaces the Station to send MAC address information to the exchange equipment to enable the flow not to be broken.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of flow interrupt method and device of preventing.
Background technology
WLAN (Wireless Local Area Networks, WLAN) provides a kind of wireless connections service of local area network (LAN), and wireless data access at a high speed can be provided; Compare with traditional line access mode that has; WLAN is free more by the use of network, has thoroughly broken away from the constraint of cable and port position, and WLAN has and is easy to carry; The advantage that is easy to move; Removed or reduced numerous and diverse network layout from, only need lay one or more AP (Access Point, access point) equipment and just can set up the LAN that covers whole building or area.Wherein, in WLAN, AC (Access Controller, wireless controller) is used for the AP of WLAN is controlled and manages.
Concrete, when the AP of a wireless terminal in an AC roams into the AP in another AC, show that then roaming has taken place this wireless terminal between AC.In the process of AC internetwork roaming, can realize communicating by letter between AC and the AC through using IACTP (Inter Access Controller Tunneling Protocol, tunnel protocol between access controller); Wherein, this IACTP provides generic encapsulation and the transmission mechanism between AC, has guaranteed the safe transmission between AC.Further, can connect through using IACTP to accomplish between a plurality of AC, thereby constitute the roaming group, the foundation of this roaming group and maintenance process are accomplished by the IACTP agreement.
As shown in Figure 1; Constituted a roaming group between AC1 and the AC2, when a Station (wireless terminal) is associated with for the first time any one AC in this roaming group (for example, AC1) time; This Station and this AC will hold consultation through using the 11Key key, and connect; After consulting completion, AC1 carries out the information of this Station synchronously in this roaming group, and promptly AC1 needs the information of this Station is notified to AC2.When Station roams into AP2 by AP1; Then roaming has taken place in this Station between AC1 and AC2; Because the information of having preserved Station in advance among the AC2; Then this Station can use this information and AC2 to hold consultation, the information that promptly AC2 can rapid authentication Station, thus in the roaming group, realize the roam procedure of this Station.
But in the prior art, Station accomplishes after the roaming between AC, will cause the interruption of flow, uninterrupted forwarding that can not dependable flow.Networking diagram as shown in Figure 2, AC1 links to each other through three-layer switching equipment with AC2, and is connected on two layers of exchange mouthful Port1 of two differences and Port2 of three-layer switching equipment, and AC1 controls AP1, and AC2 controls AP2.
Concrete, as shown in Figure 3, Station roams between AC1 and AC2 in the prior art, and may further comprise the steps through the processing procedure that three-layer switching equipment communicates:
Step S301, Station and AC1 hold consultation, and authentication through after be connected on the corresponding AP.Concrete, the process that Station and AC1 hold consultation comprises: (1) Station and AC1 carry out link negotiation; (2) Station initiates the 802.1X verification process to AC1; (3) after authentication was passed through, the Station key that authentication is obtained according to 802.1X carried out handshake procedure 4 times with AC1, and generated session key; After authentication was passed through, Station used above-mentioned session key and AP1 to communicate.
Step S302, Station learns MAC (MediaAccess Control, the media interviews control) address of switching equipment through ARP (Address Resolution Protocol, address resolution protocol) request, and broadcasts the mac address information of self.Wherein, when Station is connected on the AP1 first, can learns the MAC Address of three-layer switching equipment through the ARP request, and broadcast the ARP information (having carried mac address information in this ARP information) of self; At this moment, the Port1 mouth of three-layer switching equipment will be learnt the ARP list item of this Station, thereby carry out transfer of data according to this ARP list item and this Station.
Step S303, Station carries out data communication through using this Port1 and other network equipments.Wherein, when having stored the MAC Address of this Station in the MAC Address of having stored switching equipment among the Station and the switching equipment, this Station can carry out data communication through this switching equipment and other network equipments.
Step S304, when this Station roams among the AP2 under the AC2, this Station holds consultation with AC2 again, and authentication through after be connected on the corresponding AP2.Concrete, the process that Station and AC2 hold consultation comprises: (1) Station and AC2 carry out link negotiation; (2) Station carries out handshake procedure according to the 802.1X authenticate key that AC2 preserves 4 times with AC2, and generates session key; Wherein, this 802.1X authenticate key is that AC1 is stored when sharing.It is thus clear that when Station strode the AC roaming, Station need not carry out the 802.1X verification process, has significantly reduced negotiation time.
Step S305 for roaming into Station under the AC2, when three-layer switching equipment need be to this Station transmitted traffic, will transmit through the Port1 mouth, and Station can't receive flow from the Port1 mouth, thereby form the short interruption of flow.Wherein, Because Station can only discern and (for example switch AP; Switch to AP2), but can't judge roaming in the AC has taken place, or the AC internetwork roaming has taken place; Station can active broadcast self when not having flow to upload ARP information, promptly the Port2 mouth of three-layer switching equipment can't be learnt the ARP list item of this Station.At this moment, three-layer switching equipment is transmitted to the flow of Station, owing to there is not the ARP list item of Station on the Port2 mouth; The ARP list item is on the Port1 mouth; This flow will be transmitted through the Port1 mouth, and Station can't receive flow from the Port1 mouth, thereby has formed the short interruption of flow.Until Station is to Port2 mouth transmitted traffic, make ARP list item on the three-layer switching equipment till the Port1 mouth migration Port2 mouth, could recover the flow that three-layer switching equipment is transmitted to Station.
Summary of the invention
The present invention provides a kind of flow interrupt method and device of preventing, makes Station that when roaming take place between AC, and not the interrupting of dependable flow transmitted.
In order to achieve the above object; The present invention proposes a kind of flow interrupt method that prevents, be applied to comprise in the WLAN of at least two wireless control apparatus and switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment; Said different two layers of exchange mouth are positioned at same broadcast domain, when said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said method comprising the steps of:
The said wireless control apparatus that roams into determines said wireless terminal roaming when this equipment, and the MAC Address of said wireless terminal is sent to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful;
Corresponding relation between the MAC Address of pairing two layers of exchange mouth of the said wireless control apparatus that roams into of said switching equipment storage and said wireless terminal;
Said switching equipment exchanges mouth to said wireless terminal transmitted traffic according to the MAC Address of said wireless terminal through said two layers.
The MAC Address of said wireless terminal is sent to before the pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful, also comprises:
The initial wireless control apparatus that inserts of wireless terminal obtains the information of said wireless terminal; And other wireless control apparatus in the roaming territory are shared the information of said wireless terminal; The said wireless control apparatus that roams into obtains the information of said wireless terminal; Wherein, the MAC Address that comprises said wireless terminal in the information of said wireless terminal;
The said wireless control apparatus that roams into determines said wireless terminal roaming and is specially to this equipment: the said wireless control apparatus that roams into knows that according to the information of said wireless terminal said wireless terminal roaming is to this equipment.
The MAC Address of said wireless terminal is sent to after the pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful, also comprises:
Corresponding relation between the pairing two layers of exchange mouth of wireless control apparatus before the said switching equipment deletion roaming and the MAC Address of said wireless terminal.
The MAC Address of said wireless terminal is sent to the pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful specifically to be comprised:
The mode of the said wireless control apparatus that roams into through broadcasting sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful with the MAC Address of said wireless terminal; Or,
The message that the said wireless control apparatus that roams into will carry the MAC Address of said wireless terminal sends to the pairing two layers of exchange mouth of the above wireless control apparatus that roams into of said switching equipment.
The MAC Address of said wireless terminal is carried in the ARP list item.
A kind of flow interrupt device that prevents; Be applied to comprise at least two wireless control apparatus in wireless terminal, the same roaming territory; In the WLAN of switching equipment, different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment, and said two layers of different exchange mouths are positioned at same broadcast domain; Said device comprises acquisition module, is used to obtain the MAC Address of said wireless terminal; When said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said device also comprises:
Transceiver module; Electrically connect with said acquisition module; Be used for determining said wireless terminal roaming when this equipment, the MAC Address of the said wireless terminal that said acquisition module is obtained sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful; By said switching equipment according to the MAC Address of said wireless terminal through said two layers of exchange mouthful to said wireless terminal transmitted traffic.
Said transceiver module specifically is used for:
Mode through broadcasting sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful with the MAC Address of said wireless terminal; Or,
The message of the MAC Address that carries said wireless terminal is sent to the pairing two layers of exchange mouth of the above wireless control apparatus that roams into of said switching equipment.
The MAC Address of said wireless terminal is carried in the ARP list item.
A kind of switching equipment; Be applied to comprise at least two wireless control apparatus in wireless terminal, the same roaming territory; In the WLAN of said switching equipment, different two layers of exchange mouthful connect in different wireless control apparatus and the said switching equipment, and said two layers of different exchange mouths are positioned at same broadcast domain; When said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said switching equipment comprises:
Receiver module is used for through the MAC Address of the pairing two layers of exchange mouthful reception of the wireless control apparatus that roams into from the said wireless terminal of the said wireless control apparatus that roams into;
Memory module electrically connects with said receiver module, is used to store the corresponding relation between the MAC Address of pairing two layers of exchange of the wireless control apparatus that roams into that said receiver module receives mouthful and said wireless terminal;
Processing module electrically connects with said receiver module, is used to delete the corresponding relation between the MAC Address of roaming pairing two layers of exchange mouth of preceding wireless control apparatus and said wireless terminal;
Sending module electrically connects with said memory module, be used for MAC Address according to the wireless terminal of said memory module storage through said two layers of exchange mouth to said wireless terminal transmitted traffic.
Compared with prior art, the present invention has the following advantages: when Station accomplishes roaming between AC, replace Station to send mac address information by AC equipment and give switching equipment, make flow can not interrupt.
Description of drawings
Fig. 1 is a roaming group sketch map of the prior art;
Fig. 2 is that the flow in the roaming group is transmitted the networking sketch map in the prior art;
Fig. 3 roams between AC1 and AC2 for Station in the prior art, and the processing procedure sketch map that communicates through three-layer switching equipment;
A kind of flow interrupt method flow diagram that prevents that Fig. 4 proposes for the present invention;
The networking prompting intention that Fig. 5 proposes down for a kind of application scenarios of the present invention;
A kind of flow interrupt method flow diagram that prevents that Fig. 6 proposes down for application scenarios of the present invention;
A kind of flow interrupt structure drawing of device that prevents that Fig. 7 proposes for the present invention;
A kind of switching equipment structure chart that Fig. 8 proposes for the present invention.
Embodiment
Basic thought of the present invention is when wireless terminal initially is linked into the roaming territory, obtains the MAC Address of this wireless terminal by AC equipment, and in this roaming territory, shares this MAC Address; When this wireless terminal when an AC equipment (roaming before AC equipment) roams into another AC equipment (roaming back AC equipment); The MAC Address (obtaining when sharing) of this wireless terminal is sent to two layers of exchange mouth of correspondence on the switching equipment by AC equipment after this roaming; Make switching equipment can store this MAC Address; When flow need send to this wireless terminal; This switching equipment will send to this wireless terminal through these two layers exchange mouthful this flow according to this MAC Address, guarantee the interrupted transmission of flow.
A kind of flow interrupt method that prevents that the present invention proposes; Be applied to comprise in the WLAN of at least two wireless control apparatus and switching equipment in wireless terminal, the same roaming territory that different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment; Said two layers of different exchange mouths are positioned at same broadcast domain; When said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, as shown in Figure 4, said method comprising the steps of:
Step S401, the said wireless control apparatus that roams into determine said wireless terminal roaming when this equipment, and the MAC Address of said wireless terminal is sent to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful.
Step S402, the corresponding relation between the MAC Address of pairing two layers of exchange mouth of the said wireless control apparatus that roams into of said switching equipment storage and said wireless terminal.In addition, the corresponding relation between the MAC Address of pairing two layers of exchange mouth of wireless control apparatus before the said switching equipment deletion roaming and said wireless terminal.
Concrete; Before the wireless terminal roaming; In this switching equipment; Stored the corresponding relation between the MAC Address of self and said wireless terminal, because this wireless terminal is to be linked into wireless network through two layers of exchange mouthful A (the pairing two layers of exchange of the wireless control apparatus before the roaming mouthful), what then in this switching equipment, store is the corresponding relation between the MAC Address of two layers of exchange mouthful A and this wireless terminal.
Further; After this wireless terminal is roamed; In this switching equipment; Still will store the corresponding relation between the MAC Address of self and said wireless terminal, and this moment, this wireless terminal was to be linked into wireless network through two layers of exchange mouthful B (the pairing two layers of exchange of the wireless control apparatus after the roaming mouthful), what then in this switching equipment, need storage is the corresponding relation between the MAC Address of two layers of exchange mouthful B and this wireless terminal.But at this moment; Stored the corresponding relation between the MAC Address of two layers of exchange mouthful A and this wireless terminal in this switching equipment; Promptly need delete the corresponding relation between the MAC Address of these two layers exchange mouthful A and this wireless terminal, only keep the corresponding relation between the MAC Address of two layers of exchange mouthful B and this wireless terminal.
Step S403, said switching equipment exchanges mouth to said wireless terminal transmitted traffic according to the MAC Address of said wireless terminal through said two layers.
Need to prove that in the present invention, above-mentioned wireless control apparatus can be the combination of AC equipment and AP equipment, the fat AP of can be integrated also AC functions of the equipments and AP functions of the equipments repeats no more at this.
The flow interrupt method that prevents that a kind of application scenarios of the present invention proposes down, this prevents that the flow interrupt method is applied in the wlan network, Station takes place in the application scenarios of AC internetwork roaming in the roaming group; Networking sketch map as shown in Figure 5; This roaming group comprises AC1 and AC2, and AC1 and AC2 link to each other through switching equipment (for example, two-layer switching equipment, three-layer switching equipment etc.); Among the present invention; This switching equipment is that example describes with the three-layer switching equipment, and this three-layer switching equipment is the gateway device in this networking, includes but not limited to 3 layer switch, router etc.; AC1 is connected on two layers of exchange mouthful Port1 of three-layer switching equipment, and AC2 is connected on two layers of exchange mouthful Port2 of three-layer switching equipment, and AC1 controls AP1, and AC2 controls AP2, is connected AP1 before the Station roaming, and promptly Station is controlled by AC1; After roaming, Station is connected AP2, and promptly Station is controlled by AC2.
Concrete, the flow interrupt method is as shown in Figure 6 in above-mentioned preventing, may further comprise the steps:
Step S601, Station and AC hold consultation, and authentication through after be connected on the corresponding AP.Wherein, among the present invention be with Station when connecting AP first, connecting AP1 is that example describes, promptly Station need hold consultation with AC1.
Identical with prior art is; In this step; Station sends to AC1 with information of self IP address and mac address information, by (this AC1 can use the ARP list item to store the IP address of this Station and the corresponding relation of MAC Address) of this IP address information of AC1 storage and mac address information.After consulting completion, AC1 shares the information of this Station through IACTP in this roaming group, and wherein, the information of this Station includes but not limited to the 802.1X authenticate key, the IP address information of this Station and mac address information etc.After the AC2 in the roaming group is receiving the information of this Station, can get access to IP address information and the mac address information of this Station, promptly AC2 can obtain the MAC Address of this Station.
Step S602, Station learns the MAC Address of three-layer switching equipment through the ARP request, and broadcasts the ARP information (being IP address information and mac address information) of self.Wherein, After this Station and AP1 connect; Need carry out data communication through this three-layer switching equipment and other equipment, promptly Station need be known the MAC Address of three-layer switching equipment, and this three-layer switching equipment also need obtain the MAC Address of this Station.Station knows that the mode of the MAC Address of three-layer switching equipment is specially: Station sends the ARP request message to three-layer switching equipment; When three-layer switching equipment receives this ARP request message; To return response message to this Station; Carried the IP address and the MAC Address of this three-layer switching equipment in this response message, this Station can communicate according to this IP address and MAC Address and three-layer switching equipment.The mode that three-layer switching equipment obtains the MAC Address of this Station is specially: Station sends the ARP message that has carried self IP address and mac address information through the mode of broadcasting; Make this three-layer switching equipment store the ARP list item of this Station, and the MAC Address of this Station is arranged in this ARP list item according to this ARP message.
Step S603, Station carries out data communication through using this Port1 and other network equipments.
Step S604, when this Station roams among the AP2 under the AC2, this Station holds consultation with AC2 again, and authentication through after be connected on the corresponding AP2.Wherein, when wireless terminal initially inserted, the AC1 that initially inserts shared the information of this Station in the roaming territory, and in this step, this AC2 can know that through the information of the shared Station of AC1 this Station roams into this equipment.
Step S605, when AC2 knew that this Station strides the AC roaming, AC2 sent to two layers of exchange mouthful Port2 on the three-layer switching equipment with the MAC Address of this Station.Wherein, the MAC Address of this Station is when AC1 shares the information of this Station, to obtain.Among the present invention, AC2 can send to Port2 with the ARP list item of this Station, and has carried IP address and the MAC Address of this Station in this ARP list item.
Concrete; AC2 can send ARP message through the mode of broadcasting in the broadcast domain at Station place; After the Port2 of three-layer switching equipment received this ARP message, this three-layer switching equipment can get access to MAC Address and the IP address of this Station, and stored this MAC Address and IP address; Be that ARP list item on the three-layer switching equipment is moved to port Port2 from port Port1 rapidly; When flow need send to this Station; MAC Address according to this Station sends to this Station with this flow, thereby has realized the uninterrupted forwarding of flow.In addition, AC2 can also carry the ARP list item of this Station through the message of other types, and sends this message to the Port2 of three-layer switching equipment, so that this three-layer switching equipment can get access to MAC Address and the IP address of this Station.Wherein, the message of these other types is optional message according to actual needs, as long as can carry the ARP list item of this Station in this message, for example, can carry this ARP list item through expanding the prior protocols message, repeats no more among the present invention.
Further; After the Port2 of three-layer switching equipment receives this ARP message; This three-layer switching equipment knows that this Station moved to port Port2 from port Port1, and follow-up flow all need send through this port Port2, at this moment; This three-layer switching equipment need be deleted the pairing ARP list item of this Station among the port Port1, makes follow-up flow can not send through port Port1 again.
Need to prove, when the corresponding relation of the MAC Address of three-layer switching equipment storage Station and IP address (ARP list item), also need corresponding port be stored in this corresponding relation.When this Station communicates by letter with this three-layer switching equipment through Port1, the storage of this three-layer switching equipment be the corresponding relation between the MAC Address of Port1 and Station; And in this step; This Station communicates by letter with this three-layer switching equipment through Port2; Promptly this three-layer switching equipment need be stored the corresponding relation between the MAC Address of Port2 and Station, and will before corresponding relation between the MAC Address of Port1 and Station of storage delete.
Step S606, Station carries out data communication through using this Port2 and other network equipments.Wherein, Station and AP2 have set up wireless connections; And (obtain manner of this MAC Address is identical with the MAC Address obtain manner of Port1 to have the mac address information of Port2 on this Station; Repeat no more at this), promptly Station can pass through AP2, Port2 sends data traffic to other network equipments.Same, on three-layer switching equipment, also stored the mac address information of this Station, promptly three-layer switching equipment can use Port2 to send data traffic to Station.
As shown in Figure 7; Be a kind of flow interrupt device that prevents that the present invention proposes, be applied to comprise in the WLAN of at least two wireless control apparatus and switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment; Said two layers of different exchange mouths are positioned at same broadcast domain, and said device comprises acquisition module 71, is used to obtain the MAC Address of said wireless terminal; When said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said device also comprises:
Transceiver module 72; Electrically connect with said acquisition module 71; Be used for determining said wireless terminal roaming when this equipment, the MAC Address of the said wireless terminal that said acquisition module is obtained sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful; By said switching equipment according to the MAC Address of said wireless terminal through said two layers of exchange mouthful to said wireless terminal transmitted traffic.
Further, said transceiver module 72 specifically is used for: the mode through broadcasting sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful with the MAC Address of said wireless terminal; Or, the message of the MAC Address that carries said wireless terminal is sent to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful.
Among the present invention, the MAC Address of said wireless terminal is carried in the ARP list item.
As shown in Figure 8; Be a kind of switching equipment that the present invention proposes, be applied to comprise in the WLAN of at least two wireless control apparatus and said switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the said switching equipment; Said different two layers of exchange mouth are positioned at same broadcast domain, when said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said switching equipment comprises:
Sending module 84 electrically connects with said memory module 82, be used for MAC Address according to the wireless terminal of said memory module 82 storages through said two layers of exchange mouth to said wireless terminal transmitted traffic.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number is not represented the quality of embodiment just to description.
More than disclosedly be merely several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (9)
1. one kind prevents the flow interrupt method; It is characterized in that, be applied to comprise in the WLAN of at least two wireless control apparatus and switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment; Said different two layers of exchange mouth are positioned at same broadcast domain, when said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said method comprising the steps of:
The wireless control apparatus that the said wireless control apparatus that roams into initially inserts from wireless terminal obtains the information of said wireless terminal, comprises the MAC Address of said wireless terminal in the information of said wireless terminal;
The said wireless control apparatus that roams into determines said wireless terminal roaming when this equipment, and the MAC Address of said wireless terminal is sent to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful;
Corresponding relation between the MAC Address of pairing two layers of exchange mouth of the said wireless control apparatus that roams into of said switching equipment storage and said wireless terminal;
Said switching equipment exchanges mouth to said wireless terminal transmitted traffic according to the MAC Address of said wireless terminal through said two layers.
2. the method for claim 1 is characterized in that, the wireless control apparatus that the said wireless control apparatus that roams into initially inserts from wireless terminal obtains the information of said wireless terminal, comprising:
The initial wireless control apparatus that inserts of wireless terminal obtains the information of said wireless terminal, and the information of the shared said wireless terminal of other wireless control apparatus in the roaming territory, is obtained the information of said wireless terminal by the said wireless control apparatus that roams into;
The said wireless control apparatus that roams into determines said wireless terminal roaming and is specially to this equipment: the said wireless control apparatus that roams into knows that according to the information of said wireless terminal said wireless terminal roaming is to this equipment.
3. the method for claim 1 is characterized in that, the MAC Address of said wireless terminal is sent to after the pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful, also comprises:
Corresponding relation between the pairing two layers of exchange mouth of wireless control apparatus before the said switching equipment deletion roaming and the MAC Address of said wireless terminal.
4. the method for claim 1 is characterized in that, the MAC Address of said wireless terminal is sent to the pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful specifically comprise:
The mode of the said wireless control apparatus that roams into through broadcasting sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful with the MAC Address of said wireless terminal; Or,
The message that the said wireless control apparatus that roams into will carry the MAC Address of said wireless terminal sends to the pairing two layers of exchange mouth of the above wireless control apparatus that roams into of said switching equipment.
5. like each described method of claim 1-4, it is characterized in that the MAC Address of said wireless terminal is carried in the ARP list item.
6. one kind prevents the flow interrupt device; It is characterized in that, be applied to comprise in the WLAN of at least two wireless control apparatus and switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the switching equipment; Said two layers of different exchange mouths are positioned at same broadcast domain, and said device comprises acquisition module, is used for obtaining from the initial wireless control apparatus that inserts of wireless terminal the MAC Address of said wireless terminal; When said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said device also comprises:
Transceiver module; Electrically connect with said acquisition module; Be used for when determining said wireless terminal roaming to the said wireless control apparatus that roams into, the MAC Address of the said wireless terminal that said acquisition module is obtained sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful; By said switching equipment according to the MAC Address of said wireless terminal through said two layers of exchange mouthful to said wireless terminal transmitted traffic.
7. device as claimed in claim 6 is characterized in that, said transceiver module specifically is used for:
Mode through broadcasting sends to pairing two layers of exchange of the above wireless control apparatus that roams into of said switching equipment mouthful with the MAC Address of said wireless terminal; Or,
The message of the MAC Address that carries said wireless terminal is sent to the pairing two layers of exchange mouth of the above wireless control apparatus that roams into of said switching equipment.
8. like claim 6 or 7 described devices, it is characterized in that the MAC Address of said wireless terminal is carried in the ARP list item.
9. switching equipment; It is characterized in that, be applied to comprise in the WLAN of at least two wireless control apparatus and said switching equipment in wireless terminal, the same roaming territory; Different two layers of exchange mouthful connect in different wireless control apparatus and the said switching equipment; Said different two layers of exchange mouth are positioned at same broadcast domain, when said wireless terminal when a wireless control apparatus roams into another wireless control apparatus, said switching equipment comprises:
Receiver module is used for through the MAC Address of the pairing two layers of exchange mouthful reception of the wireless control apparatus that roams into from the said wireless terminal of the said wireless control apparatus that roams into; Said MAC Address is that the said wireless control apparatus that roams into obtains from the initial wireless control apparatus that inserts of wireless terminal;
Memory module electrically connects with said receiver module, is used to store the corresponding relation between the MAC Address of pairing two layers of exchange of the wireless control apparatus that roams into that said receiver module receives mouthful and said wireless terminal;
Processing module electrically connects with said receiver module, is used to delete the corresponding relation between the MAC Address of roaming pairing two layers of exchange mouth of preceding wireless control apparatus and said wireless terminal;
Sending module electrically connects with said memory module, be used for MAC Address according to the wireless terminal of said memory module storage through said two layers of exchange mouth to said wireless terminal transmitted traffic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101698607A CN101640882B (en) | 2009-09-07 | 2009-09-07 | Method and device for preventing flow from breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101698607A CN101640882B (en) | 2009-09-07 | 2009-09-07 | Method and device for preventing flow from breaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101640882A CN101640882A (en) | 2010-02-03 |
| CN101640882B true CN101640882B (en) | 2012-07-11 |
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| CN102158487A (en) * | 2011-04-01 | 2011-08-17 | 福建星网锐捷网络有限公司 | Network access control method, system and device |
| CN102833721B (en) * | 2012-08-06 | 2015-06-17 | 福建星网锐捷网络有限公司 | Wireless roaming data forwarding method and wireless access point |
| CN103281692B (en) * | 2013-05-08 | 2016-06-08 | 杭州华三通信技术有限公司 | Method for fast roaming between a kind of AC and equipment |
| CN105792174A (en) * | 2014-12-26 | 2016-07-20 | 华为技术有限公司 | Wireless local area network roaming method, access point and wireless controller |
| CN104796501B (en) * | 2015-04-25 | 2018-07-03 | 安徽皖通邮电股份有限公司 | A kind of method of Intermediate System to Intermediate System triggering ARP study |
| CN106211141B (en) * | 2015-04-30 | 2019-08-20 | 华为技术有限公司 | A kind of retransmission method and device of the stream of WLAN roaming stations |
| CN105451221A (en) * | 2015-11-06 | 2016-03-30 | 迈普通信技术股份有限公司 | Terminal roaming realization method, system and wireless access point |
| CN107231449B (en) * | 2016-03-24 | 2020-07-24 | 华为技术有限公司 | ARP request forwarding method and device and W L AN communication system |
| CN107547444B (en) * | 2017-07-31 | 2021-11-26 | 新华三技术有限公司 | Traffic statistical method and switching equipment |
| CN109743726B (en) * | 2018-12-05 | 2021-11-23 | 江苏鑫软图无线技术股份有限公司 | Method for sharing static terminal in LTE system roaming scene |
| CN111953607B (en) * | 2020-07-17 | 2022-10-21 | 新华三技术有限公司 | Method and device for updating route |
| CN114172753B (en) * | 2020-09-10 | 2023-04-07 | 华为技术有限公司 | Address reservation method, network equipment and system |
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