CN103368794A - ppp link detection method - Google Patents
ppp link detection method Download PDFInfo
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- CN103368794A CN103368794A CN2013103260171A CN201310326017A CN103368794A CN 103368794 A CN103368794 A CN 103368794A CN 2013103260171 A CN2013103260171 A CN 2013103260171A CN 201310326017 A CN201310326017 A CN 201310326017A CN 103368794 A CN103368794 A CN 103368794A
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Abstract
The invention discloses a ppp link detection method in which the echo message sending time interval is set to be M when the network environment period is assumed to be stable. The method comprises the following steps of: 1, sending echo messages by a client side at intervals, setting the interval between the current message sending time and the next message sending time to be T[n], and assuming the current T[n]=M; 2, judging that T[n+1]=T[n]+N if no answer messages are received within the time interval Tn; 3, judging that a ppp link is disconnected if the step 2 is continuously repeated X times; and 4, judging that T[n+1]=M if no answer messages are received within the time interval T[n]. After the method disclosed by the invention is adopted, the client side continuously prolongs the message sending interval by using a backoff algorithm if not receiving a message answer within the message sending time interval M when the network environment period is stable until the message answer is received, and a ppp dialing program can be kept online, so that the problem that the ppp dialing program is disconnected frequently when the network environment period is unstable is solved.
Description
Technical field
The present invention relates to the network system technical field, particularly relate to a kind of ppp chain circuit detecting method.
Background technology
In the application of broadband cat, majority is to carry out dial-up connection with ppp, thereby realizes function of surfing the Net, and long-time stable not the going offline of ppp seems very important, after the ppp dial-up success is generally speaking to keep by the echo message not go offline.
Consult Fig. 1, the echo message periodically sends when being grade, and namely every certain interval of time sends, and when the network traffics generating period was unstable, the echo message may all can be dropped at every turn, can cause like this ppp dial-up program to go offline.
Summary of the invention
Based on this, be necessary to provide a kind of ppp chain circuit detecting method that solves network traffics generating period dial-up program disconnection when unstable.
A kind of ppp chain circuit detecting method comprises:
When supposing the network environment cycle stability, the echo packet sending intervals is M;
Step 1: the client interval sends the echo message, and current transmission message and the time interval that next time sends message are T[n], suppose current T[n]=M;
Step 2: if Tn does not receive response message in the time interval, T[n+1 then]=T[n]+N;
Step 3: if step 2 repeats X time continuously, judge that then the ppp link goes offline;
Step 4: if T[n] receive response message, then T[n+1 in the time interval]=M.
Further, N=T[n]/2;
Further, described X is 3.
After adopting method of the present invention, do not receive in the packet sending intervals M when the network environment cycle stability that message replys, client is used back off algorithm, constantly increase message and send the interval, reply until receive message, it is online to keep the ppp dial-up program, has solved the network environment cycle when unstable, the problem that the ppp dial-up program frequently goes offline.
Description of drawings
Fig. 1 is prior art flow chart of the present invention;
Fig. 2 is an embodiment flow chart of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Consult Fig. 2, the ppp chain circuit detecting method of an embodiment provided by the invention comprises:
When supposing the network environment cycle stability, the echo packet sending intervals is M.In the prior art, all interval M sends the echo message, waits for that namely the time that receives response message is M, if do not receive several times continuously response message, then the PPP dial-up program goes offline.This situation causes local side to send response message easily, and owing to the network environment cycle is unstable, and cause client in time interval M, not received, thus make unnecessary the going offline of ppp dial-up program.
Step 1: the client interval sends the echo message, and current transmission message and the time interval that next time sends message are T[n], suppose current T[n]=M, and M is echo message routine blanking time;
Being appreciated that after sending the echo message T[n is arranged] the long time receives response message.In the present embodiment, M=30 second.
Step 2: if at T[n] do not receive response message in the time interval, T[n+1 then]=T[n]+N;
In the present embodiment, N=T[n]/2, i.e. N=15 second is at T[n]=M=30 do not receive response message, then T[n+1 in second]=T[n]+N=45 second.
Step 3: if step 2 repeats X time continuously, judge that then the ppp link goes offline;
If X=2, i.e. T[3 in the drawings]=67.5 ppp of place judge that the ppp link goes offline, X can be according to need not the arranging of network environment and application voluntarily, the like.
Step 4: if T[n] receive response message, then T[n+1 in the time interval]=M.
Among the figure, T[3] the echo message locating to send is at T[3]=T[2]+T[2]/2=67.5 receives response message in second, then recovers T[4]=M=30 second.Herein, T[3] when locating to send the echo message, the time that next time sends the echo message is just known, be T[3]==T[2]+T[2]/2=67.5, just next time time that next time sends message will be by T[3] locate to send the echo message and whether can in the official hour interval, receive decision, the like, do not giving unnecessary details at this.
Among Fig. 2, X is more than or equal to 3, if X is less than 3, then at T[3] locate or just judge that the ppp link goes offline before, just wait less than to T[4] recover to send in 30 seconds the generation at echo message interval, so the value of X will rationally be set, integrated network environment etc. factor avoids unnecessary ppp link to go offline.
After adopting method of the present invention, do not receive in the packet sending intervals M when the network environment cycle stability that message replys, client is used back off algorithm, constantly increase message and send the interval, reply until receive message, it is online to keep the ppp dial-up program, has solved the network environment cycle when unstable, the problem that the ppp dial-up program frequently goes offline.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (3)
1. a ppp chain circuit detecting method is characterized in that, comprising:
When supposing the network environment cycle stability, the echo packet sending intervals is M;
Step 1: the client interval sends the echo message, and current transmission message and the time interval that next time sends message are T[n], suppose current T[n]=M;
Step 2: if Tn does not receive response message in the time interval, T[n+1 then]=T[n]+N;
Step 3: if step 2 repeats X time continuously, judge that then the ppp link goes offline;
Step 4: if T[n] receive response message, then T[n+1 in the time interval]=M.
2. ppp chain circuit detecting method according to claim 1 is characterized in that N=T[n]/2.
3. ppp chain circuit detecting method according to claim 1 is characterized in that, described X is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103260171A CN103368794A (en) | 2013-07-30 | 2013-07-30 | ppp link detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103260171A CN103368794A (en) | 2013-07-30 | 2013-07-30 | ppp link detection method |
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| CN103368794A true CN103368794A (en) | 2013-10-23 |
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| CN2013103260171A Pending CN103368794A (en) | 2013-07-30 | 2013-07-30 | ppp link detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683189A (en) * | 2015-03-25 | 2015-06-03 | 杭州华三通信技术有限公司 | Keep-alive detection method and device of PPP sessions |
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| US20030009573A1 (en) * | 2001-07-04 | 2003-01-09 | Nec Corporation | PPP terminating equipment, network equipment and method of responding to LCP echo requirement |
| CN1808998A (en) * | 2006-01-20 | 2006-07-26 | 北京朗通环球科技有限公司 | Method of detection and maintenance of PPP link |
| CN1956444A (en) * | 2005-10-24 | 2007-05-02 | 华为技术有限公司 | Method and device for transmitting handshake message in communication system |
| CN101345663A (en) * | 2008-08-22 | 2009-01-14 | 杭州华三通信技术有限公司 | Heartbeat detection method and heartbeat detection apparatus |
| CN102394796A (en) * | 2011-11-04 | 2012-03-28 | 华为技术有限公司 | Link time delay detection method, source terminal, destination terminal and system |
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2013
- 2013-07-30 CN CN2013103260171A patent/CN103368794A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030009573A1 (en) * | 2001-07-04 | 2003-01-09 | Nec Corporation | PPP terminating equipment, network equipment and method of responding to LCP echo requirement |
| CN1956444A (en) * | 2005-10-24 | 2007-05-02 | 华为技术有限公司 | Method and device for transmitting handshake message in communication system |
| CN1808998A (en) * | 2006-01-20 | 2006-07-26 | 北京朗通环球科技有限公司 | Method of detection and maintenance of PPP link |
| CN101345663A (en) * | 2008-08-22 | 2009-01-14 | 杭州华三通信技术有限公司 | Heartbeat detection method and heartbeat detection apparatus |
| CN102394796A (en) * | 2011-11-04 | 2012-03-28 | 华为技术有限公司 | Link time delay detection method, source terminal, destination terminal and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104683189A (en) * | 2015-03-25 | 2015-06-03 | 杭州华三通信技术有限公司 | Keep-alive detection method and device of PPP sessions |
| CN104683189B (en) * | 2015-03-25 | 2018-04-20 | 新华三技术有限公司 | The keep-alive detection method and device of a kind of point to point protocol session |
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Application publication date: 20131023 |