CN1564522A - Fast re-dialling method when abnormal off-line of dialling user - Google Patents

Abstract

After receiving PADR message from PPPoE user, broadband access server picks up user's second layer information in message, and seeks PPPoE user's session table through Hash algorithm. Each on line user has an item in the table. If matched item is found, then the user is off line abnormally, and redials again. Thus, the broadband access server sends request of stopping charging to Radius server, deletes this user's information, and then sends request for the user to log on line. These steps realize user's redial to log on line quickly.

Description

Fast re-dialling method behind dial user's abnormal off-line

Affiliated technical field

The invention belongs to computer network communication field, be specifically related to the fast re-dialling method of a kind of broadband after based on point-to-point protocol (PPPoE) the dial user abnormal off-line of Ethernet.

Background technology

Along with development of internet technology, broadband access has become a kind of leading user mode access.Broadband access generally comprises modes such as adsl (asymmetric digital subscriber line) (ADSL), very high bit rate number of users word line (VDSL), Ethernet, needs according to operator's operation, these all modes generally all need broadband dialing and the process that authenticates, at present, broadband user's access authentication mainly adopts the PPPoE agreement.

With reference to figure 1, broadband user PPPoE dials up on the telephone needs two entities, and one is pppoe client, and one is BAS Broadband Access Server (BRAS).There is a kind of mutual Handshake Protocol (LCP Request/Reply) between BRAS equipment and the user PC, BRAS utilizes this each user's online state of mutual handshake mechanism perception, if the Handshake Protocol that BRAS equipment sends has obtained the response of user PC, think that then the user is online; If repeatedly (agreement regulation three times) Handshake Protocol that BRAS equipment sends all can not get responding, then think user's abnormal off-line, and announcement Radius server stops to charge and the change User Status.Because shaking hands of ppp protocol regulation is at interval free, that is to say that BRAS equipment is not all to shake hands alternately with all users all the time, but shakes hands once every certain " blanking time " (being generally 40s).Therefore, when user's abnormal off-line (crashing as operating system), the perception immediately of BRAS equipment needs promptly just can detect behind 3 * 40=120s three blanking times.If the user dialled up on the telephone with interior again 3 blanking times, if BRAS equipment only allows under a concurrent user's the situation an account number, can think that according to this User Status the user is online, with the refusing user's request of reaching the standard grade, thereby can't dial up on the telephone immediately, only after waiting for 120s, can surf the Net, perhaps by the User Status of network manager's manual change BRAS server.

The user occurs and go offline the back unusually, promptly can't realize redialing fast, could surf the Net again after often needing to wait for several minutes, cause irritated and frequent complaint of user emotion, increased the management difficulty and the workload of broadband operation greatly owing to can't redial online immediately.

Summary of the invention

The present invention overcomes the deficiency that can't redial online behind above-mentioned dial user's abnormal off-line immediately, and the fast re-dialling method behind a kind of dial user's abnormal off-line is provided.

Technology contents of the present invention: the fast re-dialling method behind a kind of user's abnormal off-line is provided, has it is characterized in that:

(1) BAS Broadband Access Server receives that earlier carrying out normal PAD0 behind PPPoE user's the PADI request message replys;

(2) BAS Broadband Access Server further can receive PPPoE user's PADR request message, two layers of information extraction with user in the message, two layers of information extraction with user in the message, in two layers of information of user, search PPPoE user conversation table by using hash algorithm, each online user has a list item, if can find the list item of coupling, the user redials once more for behind the abnormal off-line;

(3) after affirmation user abnormal off-line redialed once more, BAS Broadband Access Server sent to the Radius server earlier and stops the request of chargeing, and pressure the original subscriber roll off the production line, and the original subscriber's session information on the BAS Broadband Access Server is deleted;

(4) apply for new Session Resources again for the user, and reply the PADS message, reenter normal PPPOE identifying procedure.

Technique effect of the present invention: on BAS Broadband Access Server (BRAS), enable the quick redialing function of PPPoE, after BAS Broadband Access Server is received PPPoE user's PADR message, can whether repeat to dial in inspection according to two layers of information (MAC/VLAN ID) of user, user profile as the user that finds to dial in and former online user (in fact abnormal off-line) is in full accord, think that then this user is for redialing the user fast, BAS Broadband Access Server can send to the Radius server and stop the request of chargeing, and the original subscriber forced to roll off the production line, with the original subscriber's information deletion on the BAS Broadband Access Server, and then send user's request of reaching the standard grade, realize that the user redials online fast.

Description of drawings

Fig. 1 is that PPPoE uses the networking schematic diagram;

Fig. 2 is that PPPoE broadband user of the present invention authenticates and redials schematic flow sheet fast.

Wherein, RADIUS: remote authentication dial-in customer service; PADI:PPPoE finds initial message, mails to the PPPoE server by pppoe client; PAD0:PPPoE finds response message, mails to pppoe client by the PPPoE server; PADR:PPPoE finds request message, mails to the PPPoE server by pppoe client; PADS:PPPoE finds confirmation message, mails to pppoe client by the PPPoE server.。

Embodiment

At first system is configured:

1, the basic PPPoE termination function of configuring virtual LAN/point-to-point protocol (VLAN/PPP) module;

2, the point-to-point protocol based on Ethernet of configured port (PPPoE) termination attribute;

3, configuration RadiusClient module is connected with the Radius server, and starts authentication and billing function;

4, disposing authentication protocol/CHAP (PAP/CHAP) mode that accesses to your password authenticates the user;

5, configuration distributes the ip address by ip local pool mode for the user;

6, start " abnormal off-line redials fast " function.

Enable the quick redialing function of PPPoE on BAS Broadband Access Server (BRAS), with reference to figure 2, idiographic flow is as follows:

1, when redialing once more behind user's abnormal off-line, BAS Broadband Access Server receives that earlier PPPoE user's PADI request message only carries out normal PADO and replys, and does not temporarily repeat to dial in inspection, because the PADI that receives might be extraneous attack;

2, be that the user redials really, BAS Broadband Access Server will then be received the PADR request message, this moment, system can extract the two layers of information of user in the message, comprise MC address, source and VLAN ID, use the HASH algorithm to search PPPoE user conversation table according to two layers of information simultaneously, each online user has a list item, if can find the list item of coupling, the user profile that the user that dials in and former online user (in fact abnormal off-line) are described is in full accord, think that then this user's session information is also online, the user redials after occurring unusually fast;

3, be confirmed to be abnormal off-line and redial the user fast after, BAS Broadband Access Server sends to the Radius server earlier and stops the request of chargeing, and forces the original subscriber to be rolled off the production line, and the original subscriber's session information on the BAS Broadband Access Server is deleted;

4, be the new Session Resources of user applies that redials fast at last, and reply the PADS message, reenter normal PPPOE identifying procedure, the user of abnormal off-line is dial-up success again finally, and not have the time of wait.

Claims (2)

1. the fast re-dialling method behind user's abnormal off-line is characterized in that:

(1) BAS Broadband Access Server receives that earlier carrying out normal PADO behind PPPoE user's the PADI request message replys;

(2) BAS Broadband Access Server further can receive PPPoE user's PADR request message, two layers of information extraction with user in the message, in two layers of information of user, search PPPoE user conversation table by using hash algorithm, each online user has a list item, if can find the list item of coupling, the user redials once more for behind the abnormal off-line;

(3) redial once more for behind the abnormal off-line as the user, BAS Broadband Access Server sends to the Radius server earlier and stops the request of chargeing, and forces the original subscriber to be rolled off the production line, and the original subscriber's session information on the BAS Broadband Access Server is deleted;

(4) apply for new Session Resources again for the user, and reply the PADS message, reenter normal PPPOE identifying procedure.

2. the fast re-dialling method behind user's abnormal off-line as claimed in claim 1 is characterized in that: two layers of information of described user comprise source MAC and VLAN sign.

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