CN100407687C - Asynchronous transmission mode exchange net user's Ethernet access method - Google Patents
Asynchronous transmission mode exchange net user's Ethernet access method Download PDFInfo
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- CN100407687C CN100407687C CN2003101151034A CN200310115103A CN100407687C CN 100407687 C CN100407687 C CN 100407687C CN 2003101151034 A CN2003101151034 A CN 2003101151034A CN 200310115103 A CN200310115103 A CN 200310115103A CN 100407687 C CN100407687 C CN 100407687C
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Abstract
The present invention discloses an ethernet access method for an exchange net user for an asynchronous transmission mode, which comprises a method for the interconversion of a PPPoA message and a PPPoE message and a method for achieving the PPPoA user access in the ethernet access device by the method. A PPPoA user's PPPoE access method comprises the interconversion of the PPPoA user and an ethernet broadband access service device so as to finish the PPP negotiation, and the interconversion of the PPPoA user and the ethernet broadband access service device so as to carry out the internet visit. The PPPoA access method of the present invention can conveniently extend the new business, can improve the usage rate of the present ATM network, can reduce the cost of an operator, and can extend the application area of an ethernet exchanger.
Description
Technical field
The present invention relates to a kind of cut-in method, relate in particular to a kind of method that PPPoA and PPPoE are exchanged mutually and utilize this method in the Ethernet access device, to realize the method that PPPoA user inserts in PPP (point-to-point protocol).
Background technology
In broadband access network, except present application very widely the mode such as PPPoE (the PPP access authentication mode of Ethernet bearing), VLAN (VLAN) and 802.1X authentication, the PPP access way of on ATM once fashionable for a time (asynchronous transfer mode) switching network, carrying, i.e. PPPoA access authentication mode in addition.Below abbreviate this class as PPPoA user by the user that PPPoA inserts.
Fig. 1 shows the flow chart of the PPPoA access authentication method of prior art.As shown in Figure 1, PPPoA user use that the PPPoA access authentication method directly authenticates on the ATM access device, the termination of charging and PPP message.Its flow process is: (1) PPPoA user initiates ppp negotiation to atm device, carries out LCP (link layer control protocol) stage of PPP and consults.The PPPoA message terminates in atm device, by atm device negotiations process is controlled, and the PPP message is analyzed and the user is responded, to finish negotiations process.The control method of various negotiation process is identical in the following steps.(2) after LCP consults to finish, carry out PAP (PAP) or CHAP (challenge handshake authentication protocol) verification process according to negotiation result.(3) NCP (Network Control Protocol) that carries out PPP after verification process finishes consults, and obtains user's authorization message, and ppp negotiation is finished, and atm device begins the user is chargeed simultaneously.(4) PPPoA user carries out Internet (the Internet) visit.The user sends to visit data on the atm device.(5) ATM is when receiving user's access data, and user's PPPoA message is terminated, and data sent to user's visit destination.(6) user offline, the notice atm device, atm device stops the user being chargeed, cancellation user's access rights.
This PPPoA cut-in method requires the ATM access device must have function and 3 layers of forwarding (IP message) function of AAA (authorize, verify, charge), termination PPPoA, promptly has the function of router.But along with development of Ethernet technology, ATM has withdrawed from market gradually.In numerous Ethernet BAS (broadband inserting service) equipment, can realize the fewer and feweri of atm feature.Therefore, PPPoA cut-in method in the existing ATM switching network can not be realized on the most Ethernet switch of atm feature not having, make existing atm network not merge, can't utilize the very powerful and easy business function of renewal of Ethernet switch with the Ethernet access device.The use that this has limited the ATM switching network has undoubtedly reduced the utilance of network, has improved the operating cost of operator.On the other hand, also dwindled the range of application of Ethernet switch.
In sum, prior art exists the PPPoA cut-in method in actual use and can not merge with the Ethernet access device, the shortcoming that PPPoA user can't the access network based on ethernet switch.
Summary of the invention
In view of the above-mentioned defective of prior art, an object of the present invention is to provide and a kind of the PPPoA message is converted to the PPPoE method of message, the PPPoA cut-in method can be merged with existing ether access device.
Another object of the present invention is to utilize said method to realize asynchronous transfer mode switching network user (PPPoA user's) access on Ethernet switch.Thereby increase the utilization rate of existing network, reduce the investment of operator on network.
To achieve these goals, according to an aspect of the present invention, provide a kind of method that PPPoA message and PPPoE message are changed mutually, this method comprises the steps:
Described PPPoA message is converted to the PPPoE message, comprises:
(1) according to the PVC numbering of carrying in the PPPoA message from PPPoA user, and be numbered linear corresponding relation between PPPoA connection that index sets up and user's MAC address and the initial Session ID to connect the PVC that occupies corresponding to the PPPoA of described PPPoA message, generate this PPPoA user's MAC Address and corresponding to the Session ID of PPPoE;
(2) the PPP load data with the PPPoA message decomposes out, is packaged into new PPPoE message with described PPPoA user's MAC Address with corresponding to the Session ID of PPPoE; With
The PPPoE message that mails to described PPPoA user is converted to the PPPoA message, comprises:
(1 ') generates the PPPoA link information corresponding with described PPPoA user according to the described PPPoA user's who carries in the described PPPoE message MAC Address and described linear corresponding relation;
(2 ') PPP load data with the PPPoE message decomposes out, and the information that generates with step (1 ') is packaged into new PPPoA message.
The mutual conversion of above-mentioned PPPoA message and PPPoE message realizes in the ATM access device of ATM net.
According to another aspect of the present invention, provide a kind of method that PPPoA user inserts that realizes in the Ethernet access device, may further comprise the steps: (a) PPPoA user and ether broadband inserting service (BAS) equipment carry out ppp negotiation; (b) after described ppp negotiation success, described PPPoA user is by the visit of carrying out the internet alternately of described Ethernet BAS equipment.In said process, PPPoA user utilizes the described method of first aspect present invention to be converted to the PPPoE message to the PPPoA message that ether broadband inserting service (BAS) equipment sends, and BAS equipment utilizes the described method of first aspect present invention to be converted to the PPPoA message to the PPPoE message that PPPoA user sends.
The method that realization PPPoA user's of the present invention PPPoE inserts comprises the steps: further that after described ppp negotiation is finished Ethernet BAS equipment begins described PPPoA user is chargeed; And when user offline, notice Ethernet BAS equipment, Ethernet BAS equipment stops the user being chargeed, cancellation user's access rights.
Method of the present invention has following advantage: (1) is because the business function of Ethernet switch is very powerful and it is easy to upgrade, so can expand new business more easily; (2) can improve the utilization rate of existing atm network, reduce operator's cost.(3) enlarge the application of Ethernet switch, increased the flexibility of networking.
Description of drawings
Fig. 1 is the flow chart of the PPPoA cut-in method of prior art;
Fig. 2 is the flow chart that PPPoA user inserts of realizing in the Ethernet access device according to an embodiment of the invention.
Embodiment
Explain specific embodiments of the present invention below in conjunction with accompanying drawing.Because the existing Ethernet switch can't realize the PPPoA of ATM switching network and insert,, insert with the PPPoE that on Ethernet switch, realizes PPPoA user so the present invention is converted to the PPPoE message with ATM switching network user's PPPoA message.
At first illustrate below and the PPPoA message is converted to the PPPoE method of message according to this embodiment of the invention.
In one embodiment of the invention, Ethernet access service equipment refers to the BAS equipment of Ethernet switch.In this embodiment, PPPoA user is by the BAS equipment of ATM access device (hereinafter to be referred as the ATM access device) the access network based on ethernet switch of ATM net.Certainly, also can be by other ATM access device of Ethernet for example.
At first, need operating personnel on the ATM access device, to dispose an initial user's MAC address and initial Session ID (session identification), the maximum number that connects according to the PPPoA that allows on each groove position of this atm device to insert then, begun by initial user's MAC address and initial Session ID, the whole PPPoA that are followed successively by on each groove position connect user's MAC address section of distribution and Session ID section.Owing to be to distribute successively, so the user's MAC address section of each groove position and Session ID section can not duplicate.On each groove position, connect then and occupy the index that is numbered of PVC (PVC), and set up linear corresponding relation between PPPoA connection and user's MAC address and the initial SessionID one by one according to PPPoA.
Be exemplified below, if each groove position of atm device supports 256 PPPoA to insert, initial user's MAC address and initial Session ID that atm device is set now are 00-e0-fc-03-00-00 and 2048.
So the scope of the user's MAC address section of the atm device first groove position just should be 00-e0-fc-03-00-00 between the 00-e0-fc-03-00-ff, the scope of Session ID section just should be between 2048 to 2303.Wherein 1 the PPPoA of being numbered of PVC (PVC) inserts the user MAC that will use and is: 00-e0-fc-03-00-00, Session ID is 2048,2 the PPPoA of being numbered of PVC (PVC) inserts the user MAC that will use and is: 00-e0-fc-03-00-01, Session ID are 2049; Other PPPoA access and the like.
Equally, the scope of the user's MAC address section of the second groove position just should be 00-e0-fc-03-01-00 between the 00-e0-fc-03-01-ff, the scope of Session ID section just should be between 2304 to 2559.
PPPoA user sends the PPPoA message according to the PPPoA authentication mode of routine to the ATM access device.
The ATM access device carries out the PPPoA message is converted to the operation of PPPoE message after receiving user's PPPoA message.Specifically, the ATM access device is according to the PVC index of this user's message ATM cell, inquires unique MAC Address of this user of identification and corresponding to the SessionID of PPPoE.This Session ID determines that uniquely a PPPoE connects.
Then, the ATM access device decomposes the PPP information of PPPoA message out and is packaged into a new PPPoE message, the MAC Address that purpose MAC in this PPPoE message fills in Ethernet BAS equipment, source MAC is filled in the user's MAC address of above-mentioned generation, and ethernet type extends this as x8864.The PPPoE header of this PPPoE message extends this as successively:
The PPPoE protocol version is filled to: 0x1;
The PPPoE protocol type is filled to: 0x1;
The PPPoE type of message, because what encapsulate in the message is the PPP message, so the type field is encapsulated as: 0x00;
Session ID extends this as unique Session ID of above-mentioned generation;
Message length extends this as the PPP loaded length in the PPPoA message.
So just encapsulate out pppoe session stage message, thereby converted the PPPoA message to the PPPoE message.The ATM access device sends to Ethernet BAS equipment to the PPPoE message that is packaged into, and by Ethernet BAS equipment the PPPoE negotiation packet is analyzed.
The ATM access device is after receiving the PPPoE message that the negotiation request of Ethernet BAS equipment to the user responds, owing to just begun to have linear corresponding relation between the PPPoA connection set up and user's MAC address and the initial Session ID.So just can oppositely inquire corresponding PVC numbering according to the user's MAC address in the message, it is exactly that the up employed PVC of PPPoA message connects that this PVC connects.Then the PPP information in the PPPoE message is decomposed out and be packaged into a new PPPoA message, connect from this PVC and send.
The flow chart that adopts method according to the above embodiment of the present invention to realize PPPoA user's access in Ethernet access device (Ethernet BAS equipment) is described below in conjunction with Fig. 2.In this embodiment, the user's message form between PPPoA user and the ATM access device is an atm cell format, and the message format between ATM access device and Ethernet BAS equipment is the PPPoE form.Message between Ethernet BAS equipment and the Internet is the IPoE form.
The message that LCP negotiation (1) and LCP negotiation (2) refers to respectively consult for the LCP that finishes PPPoA user and BAS equipment among the figure is in the form of changing front and back.In like manner, PAP/CHAP authentication (3) among the figure, PAP/CHAP authenticate (4) and refer to respectively change the form of front and back for the message that the PAP/CHAP that finishes PPPoA user and BAS equipment authenticates at message, and NCP consults (5), NCP negotiation (6) refers to respectively change the form of front and back at message for the message of the NCP negotiation of finishing PPPoA user and BAS equipment.
As shown in Figure 2, in an embodiment of the present invention, realize that on the Ethernet access device method that PPPoA user inserts comprises the steps:
At first, shown in (1)-(6) of Fig. 2, PPPoA user sends the PPPoA message according to the PPPoA authentication mode of routine to the ATM of Ethernet switch access device, and carries out ppp negotiation by atm device and Ethernet BAS equipment, realizes user authentication process.This process comprises:
A) the Ethernet BAS equipment of PPPoA user and Ethernet switch carries out the LCP negotiation (step 1,2) of PPP;
In this step, the ATM access device carries out the aforesaid operation that the PPPoA message is converted to the PPPoE message after receiving user's PPPoA message.
Subsequently, after Ethernet BAS equipment is received the user's that the ATM access device generates PPPoE message, according to the Session ID in the message, MAC Address and VLAN ID or the like information judge this user not the needs Discovery (PPPoE consult discovery stage) that carries out PPPoE consult, thereby the Session (pppoe session stage) that directly carries out PPPoE consults, and user's negotiation request is responded.To the encapsulation format of user's response message with receive that the message format of Ethernet BAS equipment is identical, its source address address of filling in Ethernet BAS equipment just, destination address fills in the MAC Address that generates on the ATM access device.
The ATM access device also decomposes the PPP information in this PPPoE message out as mentioned above and is packaged into a new PPPoA message and sends to the user after receiving the PPPoE message of Ethernet BAS equipment to user response, thereby finishes mutual with the user.
B) after LCP consults to finish, carry out PAP or chap authentication process (step 3,4) according to the result who consults;
Similar with the situation of step a), in the process of carrying out PAP or chap authentication, the Ethernet BAS equipment of PPPoA user and Ethernet switch mutual all will carry out the mutual conversion of foregoing PPPoA message and PPPoE message in the ATM of Ethernet switch access device.
C) NCP that carries out PPP after verification process finishes consults, and obtains user's authorization message.After ppp negotiation was finished, Ethernet BAS equipment began the user is chargeed.(step 5,6).
With step a) and b) situation similar, in carrying out the NCP negotiations process, the Ethernet BAS equipment of PPPoA user and Ethernet switch mutual all will carry out the mutual conversion of foregoing PPPoA message and PPPoE message in the ATM of Ethernet switch access device.
After the ppp negotiation of PPPoA user and Ethernet BAS equipment was finished, PPPoA user can carry out the Internet visit.
The user sends to visit data on the Ethernet BAS equipment, and Ethernet BAS equipment terminates to user's PPPoE message when receiving user's access data, and data are carried out sending to the user capture destination after the IPoE encapsulation.
After the IPoE message that comes from Internet arrived BAS equipment, BAS equipment terminated to it, and was encapsulated as the PPPoE message and sends to PPPoA user.
To the method that the PPPoE message terminates and carries out IPoE encapsulation and termination, all be the current techique in the PPPoE authentication method, so repeat no more.
When user offline, notice Ethernet BAS equipment, Ethernet BAS equipment stops the user being chargeed, cancellation user's access rights.
More than the preferred embodiments of the present invention are described in detail for illustrative purposes; but those of ordinary skill in the art is to be appreciated that; under the situation of scope and spirit of the present invention; various improvement, interpolation and replacement all are possible, and all in the protection range that claim of the present invention limited.
Claims (9)
1. the method that PPPoA message and PPPoE message are changed mutually is characterized in that, comprises the steps:
(1) according to the PVC numbering of carrying in the PPPoA message from PPPoA user, and be numbered linear corresponding relation between PPPoA connection that index sets up and user's MAC address and the initial Session ID to connect the PVC that occupies corresponding to the PPPoA of described PPPoA message, generate this PPPoA user's MAC Address and corresponding to the Session ID of PPPoE;
(2) the PPP load data with the PPPoA message decomposes out, is packaged into new PPPoE message with described PPPoA user's MAC Address with corresponding to the Session ID of PPPoE; With
The PPPoE message that mails to described PPPoA user is converted to the PPPoA message, comprises:
(1 ') generates the PPPoA link information corresponding with described PPPoA user according to the described PPPoA user's who carries in the described PPPoE message MAC Address and described linear corresponding relation;
(2 ') PPP load data with the PPPoE message decomposes out, and the information that generates with step (1 ') is packaged into new PPPoA message.
2. method according to claim 1 is characterized in that, the process of setting up described linear corresponding relation specifically comprises:
(1-1) an initial user's MAC address of configuration and initial Session ID on the ATM access device;
(1-2) maximum number that connects according to the PPPoA that allows on each groove position of this ATM access device to insert, begin by initial user's MAC address and initial Session ID, according to the maximum PPPoA linking number on each groove position, reserve a user's MAC address section and Session ID section successively; With
(1-3) on described each groove position, connect the index that is numbered occupy PVC, set up the linear corresponding relation between PPPoA connection and user's MAC address and the initial Session ID with PPPoA.
3. method according to claim 2 is characterized in that, described step (1 ') comprising:
(1 '-1) inquires the PVC numbering of described PPPoA user's correspondence according to the described PPPoA user's who carries in the described PPPoE message MAC Address and described linear corresponding relation;
(1 '-2) determine corresponding PPPoA link information according to described PVC numbering.
4. method according to claim 1 is characterized in that,
The described PPPoA user's of described usefulness MAC Address and comprise corresponding to the step that the Session ID of PPPoE is packaged into new PPPoE message:
Purpose MAC in the PPPoE message that is generated is filled in MAC Address with the BAS equipment of described PPPoA user interactions, and source MAC is filled in described PPPoA user's MAC Address, and ethernet type extends this as x8864;
The PPPoE header of this PPPoE message is extended this as successively:
The PPPoE protocol version is filled to 0x1;
The PPPoE protocol type is filled to 0x1;
PPPoE type of message field is filled to 0x00;
Session ID extends this as the Session ID of described generation;
Message length extends this as the PPP loaded length in the described PPPoA message.
5. according to each described method of claim 1 to 4, it is characterized in that the described PPPoE message that PPPoE access service equipment is sent is converted to the step of PPPoA message and the step that the PPPoA message that described PPPoA user sends is converted to the PPPoE message is realized in the ATM access device.
6. a method that realizes asynchronous transfer mode switching network PPPoA user's Ethernet access in Ethernet access service BAS equipment is characterized in that, may further comprise the steps:
(a) PPPoA user and described BAS equipment carry out ppp negotiation; With
(b) after described ppp negotiation success, described PPPoA user carries out access to the Internet by described BAS equipment,
Wherein, in the process of described ppp negotiation and access to the Internet, PPPoA user utilizes the described method of claim 1 to be converted to the PPPoE message to the PPPoA message that described BAS equipment sends, and described BAS equipment utilizes the described method of claim 1 to be converted to the PPPoA message to the PPPoE message that described PPPoA user sends.
7. method according to claim 6 is characterized in that, described step (a) comprises the steps:
A-1) the described BAS equipment of PPPoA user and Ethernet switch carries out the LCP negotiation of PPP;
A-2) after LCP consults to finish, carry out PAP or chap authentication process according to the result who consults;
A-3) after verification process finishes, the NCP that carries out PPP consults, and obtains user's authorization message.
8. method according to claim 7 is characterized in that, described step a-1), a-2) and a-3) include in the process:
The ATM access device utilizes the described method of claim 1 that the PPPoA message is converted to the PPPoE message after receiving user's PPPoA message;
After described BAS equipment is received this PPPoE message, directly carry out the pppoe session stage and consult, user's negotiation request is responded; And
Described ATM access device utilizes the described method of claim 1 that the PPP information in this PPPoE message is decomposed out after receiving the PPPoE message of described BAS equipment to user's response, is packaged into new PPPoA message and sends to the user.
9. method according to claim 6 is characterized in that, further comprises the steps:
After described ppp negotiation was finished, described BAS equipment began described PPPoA user is chargeed; And
When user offline, notify described BAS equipment, described BAS equipment stops the user being chargeed, and disconnection is connected with the user's.
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| CN100396043C (en) * | 2006-03-17 | 2008-06-18 | 华为技术有限公司 | Connection dismantling method and access device |
| CN1822574A (en) * | 2006-03-17 | 2006-08-23 | 港湾网络有限公司 | Method for connecting broad band user |
| CN101179604B (en) * | 2007-11-27 | 2011-08-24 | 华为技术有限公司 | MAC address assignment method, equipment and system |
| CN101272305B (en) * | 2008-04-29 | 2011-06-08 | 华为技术有限公司 | Access point/user set network entry method, access point and network management device |
| CN108738019B (en) * | 2017-04-25 | 2021-02-05 | 华为技术有限公司 | User authentication method and device in converged network |
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| CN1507226A (en) * | 2002-12-11 | 2004-06-23 | 华为技术有限公司 | Method of triggering re-consultation mechanism based on point-to-point communication protocol in asynchronous transfer mode |
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| CN1332567A (en) * | 2000-05-17 | 2002-01-23 | 株式会社美迪林克 | Asymmetrical digital user line cut-in multiplexer and network system using the same |
| WO2002076027A1 (en) * | 2001-03-21 | 2002-09-26 | Corecess Inc. | Adsl access multiplexer connected to ethernet and adsl network system using the same |
| CN1404265A (en) * | 2001-09-04 | 2003-03-19 | 三星电子株式会社 | Dynamic main machine allocation protocal electronic deception with modulator-demodulator unit |
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