CN100433660C - Method and equipment for realizing fast detection - Google Patents
Method and equipment for realizing fast detection Download PDFInfo
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- CN100433660C CN100433660C CNB2006101597123A CN200610159712A CN100433660C CN 100433660 C CN100433660 C CN 100433660C CN B2006101597123 A CNB2006101597123 A CN B2006101597123A CN 200610159712 A CN200610159712 A CN 200610159712A CN 100433660 C CN100433660 C CN 100433660C
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Abstract
This invention discloses one rapid test method, which comprises the following steps: first network part receives second part to keep connection status message to send rapid detection message to second network part; if the first network part receives feedback rapid message in set time then to judge whether linkage is normal and to judge fault. This invention also discloses one rapid test device composed of receive module and rapid test module.
Description
Technical field
The present invention relates to the detection technique of communication link, particularly a kind of method and apparatus of realizing fast detecting.
Background technology
Oam agreement (Operations, Administration and Maintenance, OAM) be in complicated network, to network carry out easy, effectively manage and the cover standard that proposes, this standard mainly solves last mile Network Management problem based on IEEE 802.3ah protocol specification.
In the definition of IEEE 802.3ah OAM, OAM mainly provides following several function: OAMDISCOVERY connects foundation; Link monitoring; The remote loop test; Long-range mib variable obtains.
Wherein, OAM connects the operation principle of setting up:
The one OAM entity is set up OAM with the 2nd OAM entity and is connected, i.e. OAM DISCOVERY process.It is that an OAM entity is found the 2nd OAM entity and set up with it and stablize a kind of mechanism of session that OAM DISCOVERY connect to set up, and is first stage of OAM connection session.In this stage, carry out the exchange of configuration, port ability parameter and the sign of OAM entity mutually by OAMPDU both sides.After the one OAM entity was received the parameter of the 2nd OAM entity, whether decision agrees to set up OAM connected.Such as requiring the 2nd OAM entity to have the remote loop-back function when an OAM entity, and the 2nd OAM entity is not when having this ability, and this OAM entity can be refused to set up OAM and connect.After the two ends entity is consulted successfully, set up the OAM annexation.
Keep OAM to connect.After successfully setting up the OAM connection, the OAM entity per second at two ends sends an INFO OAMPDU to I haven't seen you for ages, with announcement oam state separately, keep connection.The one OAM entity accepting state machine also can start a reception timer, monitors the oam state of the 2nd OAM entity in real time.If before OAM connection overtime timer is overtime, never receive the INFO OAMPDU that the 2nd OAM entity sends, the one OAM entity thinks that link breaks down or the 2nd OAM entity has been closed the OAM agreement, so disconnecting OAM connects, notify other agreements to carry out backup link and switch, in case the fluid stopping amount is interrupted.
Stipulate according to IEEE 802.3ah OAM agreement, the overtime testing mechanism of link is to start a timer by each port, if do not receive the OAM message that the 2nd OAM entity sends in specifying time-out time, an OAM entity just can perceive OAM and connect fault.At present, it is 1 second at interval that the maintenance of OAM connects the message transmission, and the connection time-out time is that 5 times message sends at interval promptly 5 seconds.If link breaks down, the time of OAM needs more than 5 seconds can perception.In other words, in case link failure occurs, the time that switches to backup link needs 5 seconds at least, and flow interrupts in these 5 seconds, and this is unacceptable in the networking utilization of reality.
With the OAM protocol class seemingly, in communication system, also have many other slow protocol, as link aggregate control protocol (LACP), cluster management protocol, virtual route redundancy backup protocol etc.For the problem in the OAM agreement recited above, these slow protocol exist too, and are promptly blunt for the link failure perception, can not pinpoint the problems apace under link failure or message dropping situation, in time carry out backup link and switch, make service quality seriously descend.
Summary of the invention
In view of this, the invention provides a kind of method that realizes fast detecting, can realize the fast detecting of slow protocol link failure.
The present invention also provides a kind of equipment of realizing fast detecting, can realize the fast detecting of slow protocol link failure.
For realizing above-mentioned first purpose, the present invention adopts following technical scheme:
A kind of method that realizes fast detecting, this method comprises:
A, after first network entity send to keep the message of connection status, when not receiving the handshake message of maintenance connection status of second network entity on time, send the quick detection message to second network entity; B, if first network entity receives the quick detection response message that second network entity returns at the appointed time, judge that then Link State is normal, otherwise judge that link breaks down.
Preferably, when second network entity sent the quick detection message, described first network entity can start the quick detection wait timeout timer that sets in advance in this first network entity described in the step a;
Stipulated time described in the step b can be the timing of quick detection wait timeout timer;
After judging among the step b that Link State is normal, may further include: close quick detection wait timeout timer.
Preferably, described in the step a to second network entity send the quick detection message can for: before quick detection wait timeout timer expiry, first network entity repeats to send the quick detection message to second network entity.
Preferably, when starting quick detection wait timeout timer among the step a, can further start quick timer;
Described to second network entity repeat to send the quick detection message can for: first network entity according to the setting of quick timer, regularly send the quick detection message to second network entity.
Preferably, set in advance the maximum probe number of times, send described in the step a quick detection message can for: before not receiving the quick detection response message, send the quick detection message at interval with regular time;
First network entity described in the step b receive at the appointed time quick detection response message that second network entity returns can for: the transmission number of times of quick detection message receives the quick detection response message that second network entity returns before surpassing the maximum probe number of times.
Preferably, described quick detection message can be the message of redetermination or amended existing message.
Preferably, described quick detection response message can be the message that keeps connection status described in the message of redetermination or the step a.
Preferably, judge among the step b that Link State is normal after, may further include: first network entity switches back normal condition, sends the message of transmission maintenance connection status at interval according to keeping connecting message.
Preferably, after the judgement link broke down among the step b, may further include: the reporting links fault, upper-layer protocol judged whether to switch to backup link according to this link failure.
Preferably, do not receive described in the step a on time can for: keep to connect message and send in time interval after prolonging at interval and do not receive comparing.
For realizing above-mentioned second purpose, the present invention adopts following technical scheme:
A kind of equipment of realizing fast detecting, this equipment is arranged in protocol entity equipment, comprising: receiver module and quick detection module;
Described receiver module is used to receive the handshake message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module is carried out fault-finding on time;
Described quick detection module, be used to receive the notice that described receiver module sends, and the quick detection message sent, also be used to receive outside quick detection response message, and when receiving this message at the appointed time, judge that Link State is normal, when not receiving the quick detection response message at the appointed time, judge that link breaks down.
Preferably, described quick detection module can comprise: probe messages transceiver module, quick detection wait timeout timer and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and the quick detection message sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, and close described quick detection wait timeout timer, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick detection wait timeout timer is used to receive startup and the shutdown signal that described probe messages transceiver module sends, and the wait timeout time is surveyed in control, and when timer expiry, sends time exceeded message to described probe messages transceiver module;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
Preferably, described probe messages transceiver module can comprise packet sending and receiving module and quick timer;
Described packet sending and receiving module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described packet sending and receiving module sends the quick detection message.
Preferably, described quick detection module can comprise: probe messages transceiver module, quick timer, detection times counter and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, and notify described detection times rolling counters forward when sending the quick detection message each, also be used under the control of described detection times counter, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, receive that described counter sends stop probe message after, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described probe messages transceiver module sends the quick detection message;
Described detection times counter, be used to preserve the maximum probe number of times, receive the count information that described probe messages transceiver module sends, and add 1 operation, when maximum probe number of times that count value itself equals to preserve, send to described probe messages transceiver module and to stop probe message;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judges that then Link State is normal, judges that then link breaks down.
A kind of protocol entity equipment of realizing fast detecting comprises: sending module, receiver module and quick detection module;
Described sending module is used for regularly sending the message that keeps connection status to the outside;
Described receiver module is used to receive the handshake message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module is carried out fault-finding on time;
Described quick detection module, be used to receive the notice that described receiver module sends, and the quick detection message sent, also be used to receive outside quick detection response message, and when receiving this message at the appointed time, judge that Link State is normal, when not receiving the quick detection response message at the appointed time, judge that link breaks down.
Preferably, described quick detection module can comprise: probe messages transceiver module, quick detection wait timeout timer and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and the quick detection message sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, and close described quick detection wait timeout timer, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick detection wait timeout timer is used to receive startup and the shutdown signal that described probe messages transceiver module sends, and the wait timeout time is surveyed in control, and when timer expiry, sends time exceeded message to described probe messages transceiver module;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
Preferably, described probe messages transceiver module can comprise packet sending and receiving module and quick timer;
Described packet sending and receiving module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described packet sending and receiving module sends the quick detection message.
Preferably, described quick detection module can comprise: probe messages transceiver module, quick timer, detection times counter and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, and notify described detection times rolling counters forward when sending the quick detection message each, also be used under the control of described detection times counter, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, receive that described counter sends stop probe message after, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described probe messages transceiver module sends the quick detection message;
Described detection times counter, be used to preserve the maximum probe number of times, receive the count information that described probe messages transceiver module sends, and add 1 operation, when maximum probe number of times that count value itself equals to preserve, send to described probe messages transceiver module and to stop probe message;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
As seen from the above technical solution, the present invention is in the communication process of slow protocol link, if first network entity when not receiving the message of second network entity, promptly initiatively sends the quick detection message to second network entity on time, whether the active probe network link breaks down; Second network entity is if receive the quick detection message, and then detection time is shortened in response at once as far as possible; If first network entity can receive the quick detection response than connecting in the shorter detection time-out time of time-out time, show that then link is normal, first network entity switches back normal condition, and the transmission of stipulating by agreement sends message at interval, otherwise judges that link breaks down.To therefore under link failure or message dropping situation, can pinpoint the problems fast much smaller than connecting time-out time owing to survey time-out time, in time carry out backup link and switch, strengthen the robustness of network, improve service quality greatly.
Further, when first network entity sends the quick detection message, can in surveying time-out time, repeat to send with certain frequency, with of the influence of opposing Network Packet Loss to the quick detection accuracy, this time interval that sends the quick detection message keeps the connection status message much smaller than normal transmission transmission interval, can shorten indirectly and judge the normal required time of link, effectively improve detection efficient, make network entity switch back normal condition as early as possible.
Simultaneously, because the present invention is the state that has increased quick detection in network entity, but the normal state that sends handshake message of influence, therefore can not cause to connect that protocol massages spreads unchecked, increases problems such as CPU burden in unstable, the network.
Description of drawings
Fig. 1 is the overview flow chart of realization method for quick of the present invention.
Fig. 2 is the overall construction drawing of realization fast detecting equipment of the present invention.
Fig. 3 is the method for quick flow chart of OAM protocol link in the embodiment of the invention one.
Fig. 4 is the graph of a relation of oam state migration behind the increase quick detection state machine.
The oam state transition graph of Fig. 5 for simplifying.
Fig. 6 is the fast detecting equipment of OAM protocol link in the embodiment of the invention one.
Fig. 7 is the fast detecting equipment of OAM protocol link in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technological means and advantage clearer,, the specific embodiment of the present invention is described below in conjunction with the accompanying drawing embodiment that develops simultaneously.
Basic thought of the present invention is: when first network entity when not receiving the message of second network entity on time, promptly send the quick detection message to second network entity; Second network entity responds when receiving the quick detection message at once; If first network entity receives the quick detection response message on time, judge that then link is normal, otherwise judge that link breaks down.
Fig. 1 is the overview flow chart of realization method for quick of the present invention.As shown in Figure 1, this method comprises:
Step 101 when the message of first network entity in the maintenance connection status of not receiving second network entity on time, sends the quick detection message to second network entity.
In this step, if link is normal, second network entity receives the quick detection message, and returns the quick detection response message at once; If link failure, second network entity can't receive the quick detection message, also just can not return the quick detection response message.
Step 102 if first network entity receives the quick detection response message that second network entity returns at the appointed time, judges that then Link State is normal, otherwise judges that link breaks down.
Fig. 2 is the overall construction drawing of realization fast detecting equipment of the present invention.As shown in Figure 2, this equipment 200 comprises: receiver module 220 and quick detection module 230.
In this equipment 200, receiver module 220 is used to receive the message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module 230 is carried out fault-finding on time.
The said equipment 200 can be the part that increases in original OAM entity device, perhaps, it also can be the modification that original OAM entity device is carried out, if the latter, so in this equipment, can also comprise sending module 210, be used to carry out existing according to keeping connecting the message that message sends interval timed sending maintenance connection status.
More than be overview, lift specific embodiment below the present invention is described in further detail the method for quick and the equipment of slow protocol link of the present invention.
Can in the present invention, first network entity sends the quick detection message, judge according to receiving the quick detection response message that second network entity returns at the appointed time whether link breaks down.In this process, the timing mode of stipulated time can have two kinds: first, setting interval-quick detection wait timeout time regular time is the stipulated time, can first network entity repeats to send the quick detection message to the second network entity one or many in this time, judge to receive the quick detection response message that second network entity returns in this quick detection wait timeout time whether link breaks down; Second, set the time interval of maximum probe number of times and transmission quick detection message, with the two product as the stipulated time, first network entity repeated to send the quick detection message to second network entity according to the time interval of the transmission quick detection message of setting, and count sending the message number of times, can first network entity judge to receive the quick detection message that second network returns before the message number of times surpasses the maximum probe number of times sending whether link breaks down.
By embodiment one and embodiment two this dual mode is described in detail respectively below.
Embodiments of the invention are example with the method and apparatus that carries out fast detecting in the OAM agreement, and embodiments of the present invention are described.
Embodiment one:
In the present embodiment, setting one a quick detection wait timeout time of interval regular time is the stipulated time, and an OAM entity sends the quick detection message to the 2nd OAM entity in this quick detection wait timeout time.
Fig. 3 is the method for quick flow chart of OAM protocol link in the embodiment of the invention one.As shown in Figure 3, this method comprises:
Step 301, OAM connects foundation.
This step is that normal OAM communication is prepared.Comprise and connect local connect foundation, long-range connection foundation.
Step 302, an OAM entity timed sending OAM message, and start the reception timer.
In this step, the transmission that an OAM entity sends message is 1 second at interval.In the present invention, the timing of the reception timer that an OAM entity is started can be same as the prior art, is existing maintenance and connects the message transmission at interval, 1 second; Perhaps, for preventing transmission lag shake, a kind of preferable mode can for, time of receiving timer is sent on the basis at interval and has suitably enlarged a bit keeping connecting message, getting the reception timer in the present embodiment is 1100 milliseconds.
Step 303, whether OAM entity monitoring receives the OAM message of shaking hands before receiving timer expiry, if, then return step 302, otherwise execution in step 304 and subsequent step thereof.
Step 302～303rd, the process that keeps OAM to connect, also promptly an OAM entity receives the OAM message of shaking hands that the 2nd OAM entity sends before receiving timer expiry, the packet sending and receiving that then shows link is normal, and the time interval that an OAM entity continued with 1 second sends the OAM message to the 2nd OAM entity; When packet sending and receiving just often, execution in step 302～303 all the time circulates.
But if an OAM entity does not receive the OAM message of shaking hands that the 2nd OAM entity sends yet when receiving timer expiry, show that then link may have problems, get started fast detecting, i.e. execution in step 304 and subsequent step thereof.
Step 304 starts quick detection wait timeout timer, sends quick detection OAM message to the 2nd OAM entity.
In this step, quick detection wait timeout timer is used for controlling the wait timeout time of surveying, this time-out time is 500 milliseconds in the present embodiment much smaller than the connection time-out time of OAM agreement, so just can judge after waiting for 500 milliseconds whether link breaks down; The fast detecting OAM message that sends can be the message format that redefines, and perhaps also can be the message format after existing OAM message is made amendment, and as the extended field in the OAM message being done corresponding definition, forms quick detection OAM message.
If the 2nd OAM entity receives the OAM message of quick detection, then response at once.
Whether step 305, OAM entity monitoring before quick detection wait timeout timer expiry, receive the quick detection response message that the 2nd OAM entity sends, if, then return step 302, otherwise execution in step 306 and subsequent step thereof.
In this step, judge whether before surveying the wait timeout timer expiry, to receive the quick detection response message that the 2nd OAM entity sends, if, judge that then Link State is normal, return step 302, continue to send the OAM message OAMINFOPDU that sends the maintenance connection status at interval with the OAM message; Otherwise, judge that link breaks down, and report fault.
The quick detection response message here both can be the message of redetermination, also can be existing message.In the present embodiment, adopt the OAM message that keeps connection status as the quick detection response message.Promptly the 2nd OAM entity is under normal communications status, send the OAM message that keeps connection status at interval with default transmission, just per second sends once, after receiving the quick detection message, just send the OAM message that keeps connection status at once, as response to quick detection.The one OAM entity receives the OAM message that keeps connection status before quick detection wait timeout timer expiry, determine that promptly Link State is normal.
Step 306 judges that link breaks down.
Step 307, an OAM entity reports fault.
Step 308, whether first other upper-layer protocol entities switch to backup link according to the fault judgement that reports.
So far, the method flow in the present embodiment finishes.
In above-mentioned steps 304, be to send a quick detection message to the 2nd OAM entity, promptly wait for receiving message.In fact, in actual applications, have certain packet loss in the network, if this quick detection message dropping, even the OAM link is normal, the 2nd OAM entity can not in time return the quick detection response message.Therefore in step 3O4, can repeat to send a plurality of quick detection messages, reducing in the network message dropping for the influence of fault detection accuracy, embodiment can for:
When sending the quick detection message, start quick timer, this quick timer is the time interval that is used for controlling quick detection OAM message, this time interval is much smaller than the transmission interval of normal transmission OAM message, also less than quick detection wait timeout timer, as, can adopt 100 milliseconds.Before quick detection wait timeout timer expiry, if do not receive the response message of the quick detection that the OAM entity sends, then send the OAM message of quick detection according to the setting of quick timer always, as the OAM message that sends a quick detection every 100 milliseconds, up to receiving the quick detection response message, promptly stop to send; Or quick detection wait timeout timer expiry, also stop to send.
Control by above-mentioned quick timer, in the present embodiment, before quick detection wait timeout timer expiry, if do not receive the quick detection response message all the time, 5 quick detection messages can be sent altogether, packet loss phenomenon in the network can be reduced greatly the influence of fault detection accuracy.
Can realize the quick diagnosis of fault behind the use said method, obvious with 5 seconds original comparative effectiveness.For instance: if the 2nd OAM entity was sent out a message in 1 second, be exactly 1 second the average time that such OAM entity does not receive probe message, when not responding, the one OAM entity starts 100 milliseconds quick timer and 500 milliseconds quick detection wait timeout timer, send the quick detection message, all do not have response if amount to 5 quick detection messages, then judge port failure.Total like this failure detection time, average out to was about 1.5 seconds.Compare shortening greatly with original 5 seconds failure detection time, the speed of fault detect effectively is provided.
In the present embodiment, only the time interval with quick timer is 100 milliseconds, the time-out time of quick detection wait timeout timer is 500 milliseconds and illustrates, certainly in actual applications, can define the different time sends interval and quick detection wait timeout timer as the message of quick timer time-out time according to actual conditions.
After using said method, in the OAM entity, residing state has just increased the quick detection state during its work, when the OAM entity is in the quick detection state, promptly begins Link State is carried out fast detecting.Aspect realization, the operation in the time of can realizing the quick detection state by the quick detection state machine on the software.
Fig. 4 is the graph of a relation of oam state migration behind the increase quick detection state machine.As shown in Figure 4, the state of OAM entity has, and: OAM connects and to set up initial condition (OAM DISCOVERY INIT), OAM and connect that the local terminal state (OAM DISCOVERY LOCAL) of setting up, OAM connect the far-end state (OAM DISCOVERY REMOTE) of setting up, OAM connects OK state (OAMDISCOVERY OK) and the quick detection state set up.
Wherein, OAM DISCOVERY INIT, OAM DISCOVERY LOCAL and OAMDISCOVERY REMOTE are connected three kinds of states in the process of foundation at OAM, OAMDISCOVERY OK then is the process that keeps connection, they all are original states in the OAM entity, transfer relationship between it is same as the prior art, just repeats no more here.Be example with the timing in the method shown in Figure 3 below, introduce the fast detecting state of increase and the transfer relationship between other state.
When an OAM entity is in OAM DISCOVERY OK, if when receiving timer expiry for 1100 milliseconds, do not receive the OAM message of the maintenance connection that the 2nd OAM entity sends yet, then enter the quick detection state, per 100 milliseconds send 1 quick detection OAM message, start 500 milliseconds of quick detection wait timeout timers; If during 500 milliseconds of timer expiries, do not receive the quick detection response message that the 2nd OAM entity sends yet, then judge link failure, enter OAMDISCOVERY INIT state; If before 500 milliseconds of timer expiries, receive the quick detection response message, judge that then link is normal, enter OAM DISCOVERY OK state.
Fig. 5 is the oam state transition graph of simplification.As shown in Figure 5, wherein, receive (Rx) state machine and be the synthesis that connects among Fig. 4 and keep the various state machines in the connection procedure, switch condition between OAM quick detection state machine and Rx state machine is: when receiving timer expiry for 1100 milliseconds, promptly change OAM quick detection state machine over to by the Rx state machine, when receiving the quick detection response message, promptly change the Rx state machine over to by OAM quick detection state machine.The synthesis of other state that other state machine may be in for the OAM entity.
Oam state transition relationship by above-mentioned Fig. 4 and Fig. 5 can visually see, the present invention is by the OAM quick detection, under the situation that does not influence normal protocol packet sending and receiving rhythm, realized the fast detecting of link failure, can not occur connecting that protocol massages spreads unchecked, increases problems such as CPU burden in unstable, the network, be a slow effective means of solution slow protocol fault perception.
Above-mentioned quick fault testing method for a kind of OAM protocol link of providing in the present embodiment can realize the fast detecting to link failure.Present embodiment also provides a kind of quick fault testing equipment of OAM protocol link, can be used to implement said method.Fig. 6 is the fast detecting equipment of a kind of OAM protocol link in the embodiment of the invention one.This equipment is a kind of embodiment of fast detecting equipment shown in Figure 2, and is to carry out amended equipment on the basis of original OAM entity device, so it comprises sending module 210.As shown in Figure 6, this equipment 200 comprises: sending module 210, receiver module 220 and quick detection module 230.In the present embodiment, the concrete structure of quick detection module 230 comprises probe messages transceiver module 231, quick detection wait timeout timer 2 32 and fault verification module 233, and probe messages transceiver module 631 also comprises packet sending and receiving module 631a and quick timer 631b.
In this equipment 200, sending module 210 is used for sending the OAM message that timed sending at interval keeps connection status according to the OAM message.Receiver module 220 is used to receive the OAM message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module 230 is carried out fault-finding on time.
In quick detection module 230, the packet sending and receiving module 231a of probe messages transceiver module 231, be used to receive the notice that receiver module 220 sends, and under the control of quick timer 2 31b, regularly quick detection OAM message is sent, start quick detection wait timeout timer 2 32, also be used under the control of quick detection wait timeout timer 2 32, receive outside quick detection response message, when receiving the quick detection response message, notice fault verification module 233 has been received response, and behind the time exceeded message that receives 32 transmissions of quick detection wait timeout timer 2, notice fault verification module 233 is received response.
The quick timer 2 31b of probe messages transceiver module 231 is used to control the time interval that packet sending and receiving module 231a sends the quick detection message.
Quick detection wait timeout timer 2 32 is used for control and surveys the wait timeout time, and when timer expiry, sends time exceeded message to probe messages transceiver module 231.
In the structure of the said equipment 200, when sending the quick detection message in the probe messages transceiver module 231, can carry out duplicate message and send, in this module, utilize the transmission time interval of quick timer 2 31b control quick detection message.Certainly,, can not comprise quick timer 2 31b, perhaps can adopt other circuit structure control to repeat to send if when sending the quick detection message, only send once.
In the present embodiment, whether the one OAM entity is received the quick detection response message at the appointed time, be that time-out time that quick detection wait timeout timer is set is as the stipulated time, before this timer expiry, receive the quick detection response message and judge that then Link State is normal, when this timer expiry, do not receive the quick detection response message yet and judge that then link breaks down.
Embodiment two:
In the present embodiment, when the one OAM entity sends the quick detection message, repeat intervally to send with regular time, set in advance the maximum probe number of times, the stipulated time that receives the quick detection response message is the maximum probe number of times and the product in the time interval that sends the quick detection message.
In the present embodiment, two ends OAM entity connects identical with embodiment one with the process that keeps connection status, just repeats no more here.Suppose that the maximum probe number of times that sets in advance is 5.The one OAM entity carries out fast detecting when link may break down process is as follows:
When shaking hands during the OAM message that an OAM entity does not receive at the appointed time that the 2nd OAM entity sends, then start quick timer, and according to the setting of quick timer, with 100 milliseconds is the cycle to send the quick detection message to the 2nd OAM entity, and the quick timer with 100 milliseconds in the present embodiment is an example.
When sending the quick detection message, should follow following condition:
If timer time arrives fast, promptly reach 100 milliseconds apart from the time that sent the quick detection message last time, the one OAM entity does not receive the quick detection response message that the 2nd OAM entity returns, then an OAM entity sends the quick detection message, and the number of times of transmission of quick detection message is added 1 operation; In case an OAM entity receives the quick detection response message, then closes quick timer, no longer sends the quick detection message, and the transmission number of times of quick detection message is put 0;
Before sending the quick detection message, the maximum probe number of times that sends number of times and preservation that compares the quick detection message, if the quick detection message send number of times less than the maximum probe number of times of preserving, then send the quick detection message, if the quick detection message send the maximum probe number of times that number of times equals to preserve, then close quick timer, no longer send the quick detection message, and the transmission number of times of quick detection message is put 0.
Send the quick detection message according to above-mentioned condition,, judge that then the OAM Link State is normal if before timer cuts out fast, receive the quick detection response message that the 2nd OAM entity returns; If when timer cuts out fast, do not receive the quick detection response message that the OAM entity returns yet, judge that then the OAM link breaks down.
After breaking down or judge that Link State is normal for link, identical among the subsequent operation of carrying out and the embodiment one, just repeat no more here.
So far, in the present embodiment OAM link is carried out the flow process end of fast detecting.
By as can be seen above-mentioned, in the present embodiment, be 100 milliseconds * 5=500 millisecond to the time that the final decision link breaks down from sending for the first time the quick detection message, identical with the time among the embodiment one.As seen, the effect of utilizing a quick timer and counter mechanism to reach equally in the present embodiment to utilize quick timer and quick detection wait timeout timer to carry out timing is the mode that limits another stipulated time to receiving the quick detection response message that can implement.
Above-mentioned quick fault testing method for a kind of OAM protocol link of providing in the present embodiment can realize the fast detecting to link failure.Present embodiment also provides a kind of quick fault testing equipment of OAM protocol link, can be used to implement said method.Fig. 7 is the fast detecting equipment of a kind of OAM protocol link in the embodiment of the invention two.This equipment is a kind of embodiment of fast detecting equipment shown in Figure 2, and is to carry out amended equipment on the basis of original OAM entity device, so it comprises sending module 210.As shown in Figure 7, this equipment 200 comprises: sending module 210, receiver module 220 and quick detection module 230.In the present embodiment, the concrete structure of quick detection module 230 comprises probe messages transceiver module 234, quick timer 2 35, detection times counter 236 and fault verification module 237.
In this equipment 200, sending module 210 is used for the OAM message according to OAM agreement regulation timed sending maintenance connection status.Receiver module 220 is used to receive the OAM message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module 230 is carried out fault-finding on time.
In quick detection module 230, probe messages transceiver module 234, be used to receive the notice that receiver module 220 sends, and under the control of quick timer 2 35, regularly quick detection OAM message is sent, and notice detection times counter 236 is counted at every turn when sending the quick detection message, also be used under the control of detection times counter 236, receive outside quick detection response message, when receiving the quick detection response message, notice fault verification module 236 has been received response, receive that detection times counter 236 sends stop probe message after, notice fault verification module 237 is not received response.
Timer 2 35 is used to control the time interval that probe messages transceiver module 234 sends the quick detection message fast.Detection times counter 236, be used to preserve the maximum probe number of times, receive the count information that probe messages transceiver module 234 sends, and add 1 operation, when maximum probe number of times that count value itself equals to preserve, send to probe messages transceiver module 234 and to stop probe message.
The above-mentioned fast detecting equipment that the OAM protocol link that provides in the present embodiment is provided.
The execution mode of equipment is that example describes with the equipment of making amendment on the basis of original OAM entity device all among above-mentioned two embodiment, in fact, if the execution mode of this equipment is the equipment that increases on the basis of original OAM entity device, the execution mode that then relates to the receiver module of quick detection and quick detection module in this equipment all with above-mentioned two embodiment in identical, just in this equipment, do not comprise sending module.
By the method and apparatus execution mode in the above-mentioned present embodiment as can be seen, in the present embodiment, the judgment mode that whether the one OAM entity is received at the appointed time the quick detection response message is: when sending the quick detection message, repeat intervally to send with regular time, and set in advance the maximum probe number of times, when surpassing the maximum probe number of times that sets in advance, do not receive the number of times that sends the quick detection message quick detection response message yet, judge that then link breaks down, when the number of times that sends the quick detection message does not surpass the maximum probe number of times that sets in advance, receive the quick detection response message, judge that then Link State is normal.
By above-mentioned two embodiment as can be seen, under the link normal condition, with 1 second time interval transmission OAM message.When not received the handshake message of the 2nd OAM entity at official hour, judge that promptly link may break down, carry out fast detecting so start fast detection mechanism.Send the quick detection message to the 2nd OAM entity, require its fast return response.If receive response at the appointed time, show that then link is normal; Otherwise judge that link breaks down.To far be shorter than the connection time-out time owing to wait for the time-out time of quick detection, therefore can make quick judgement, realize the quick diagnosis and the processing of fault, can improve service quality greatly link failure.
The foregoing description is to use the specific embodiment of the present invention that the present invention is the example explanation in the OAM agreement.In fact,, can use the present invention equally and solve the slow problem of fault detect such as LACP, cluster management protocol, virtual route redundancy backup protocol etc. for other.
For example, in the LACP agreement, under the normal condition, send the LAC message LACPDU that keeps connection status,, promptly send the quick detection message, carry out link failure detection to second network entity when receiving handshake message in the time in LACP agreement predetermined timing.Second network entity is after receiving the quick detection message, return the quick detection response message at once, this message can be the LACPDU that keeps connection status, also can be the message format of other redetermination, as long as can notify the first network entity Link State normally.First network entity is when sending the quick detection message, start quick detection wait timeout timer,, judge that then Link State is normal if before this timer expiry, receive the quick detection response message, switch back normal condition, send the LACPDU of maintenance connection status with the frequency of LACP regulation; If when the quick detection waiting timer is overtime, do not receive the quick detection response message yet, judge that then link breaks down.Certainly when sending the quick detection message, also can repeat to send, to reduce packet loss phenomenon in the network to the influence of fault detection accuracy with certain frequency.
As seen, the present invention all can be suitable for for the fault detect in the slow protocol, can reach the purpose of fast detecting link failure, and can not occur influencing the mutual rhythm of normal message, makes in the network message spread unchecked and increase problems such as CPU burden.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1, a kind of method that realizes fast detecting is characterized in that, this method comprises:
A, after first network entity send to keep the message of connection status, when not receiving the handshake message of maintenance connection status of second network entity on time, send the quick detection message to second network entity; B, if first network entity receives the quick detection response message that second network entity returns at the appointed time, judge that then Link State is normal, otherwise judge that link breaks down.
2, method according to claim 1 is characterized in that, when second network entity sent the quick detection message, described first network entity started the quick detection wait timeout timer that sets in advance in this first network entity described in the step a;
Stipulated time described in the step b is: the timing of quick detection wait timeout timer;
After judging among the step b that Link State is normal, further comprise: close quick detection wait timeout timer.
3, method according to claim 2, it is characterized in that, sending the quick detection message to second network entity described in the step a is: before quick detection wait timeout timer expiry, first network entity repeats to send the quick detection message to second network entity.
4, method according to claim 3 is characterized in that, when starting quick detection wait timeout timer among the step a, further starts quick timer;
Describedly repeat to send the quick detection message to second network entity and be: first network entity regularly sends the quick detection message to second network entity according to the setting of quick timer.
5, method according to claim 1 is characterized in that, sets in advance the maximum probe number of times, sends the quick detection message described in the step a to be: before not receiving the quick detection response message, send the quick detection message at interval with regular time;
First network entity described in the step b receives the quick detection response message that second network entity returns at the appointed time: the transmission number of times of quick detection message receives the quick detection response message that second network entity returns before surpassing the maximum probe number of times.
6, method according to claim 1 is characterized in that, described quick detection message is: the message of redetermination or amended existing message.
7, method according to claim 1 is characterized in that, described quick detection response message is: the message that keeps connection status described in the message of redetermination or the step a.
8, method according to claim 1 is characterized in that, judge among the step b that Link State is normal after, further comprise: first network entity switches back normal condition, sends the message of transmission maintenance connection status at interval according to keeping connecting message.
9, method according to claim 1 is characterized in that, after the judgement link broke down among the step b, further comprise: the reporting links fault, upper-layer protocol judged whether to switch to backup link according to this link failure.
10, method according to claim 1 is characterized in that, do not receive described in the step a on time for: keep to connect message and send in time interval after prolonging at interval and do not receive comparing.
11, a kind of equipment of realizing fast detecting is characterized in that, this equipment is arranged in protocol entity equipment, comprising: receiver module and quick detection module;
Described receiver module is used to receive the handshake message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module is carried out fault-finding on time;
Described quick detection module, be used to receive the notice that described receiver module sends, and the quick detection message sent, also be used to receive outside quick detection response message, and when receiving this message at the appointed time, judge that Link State is normal, when not receiving the quick detection response message at the appointed time, judge that link breaks down.
12, equipment according to claim 11 is characterized in that, described quick detection module comprises: probe messages transceiver module, quick detection wait timeout timer and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and the quick detection message sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, and close described quick detection wait timeout timer, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick detection wait timeout timer is used to receive startup and the shutdown signal that described probe messages transceiver module sends, and the wait timeout time is surveyed in control, and when timer expiry, sends time exceeded message to described probe messages transceiver module;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
13, equipment according to claim 12 is characterized in that, described probe messages transceiver module comprises packet sending and receiving module and quick timer;
Described packet sending and receiving module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described packet sending and receiving module sends the quick detection message.
14, equipment according to claim 11 is characterized in that, described quick detection module comprises: probe messages transceiver module, quick timer, detection times counter and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, and notify described detection times rolling counters forward when sending the quick detection message each, also be used under the control of described detection times counter, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, receive that described counter sends stop probe message after, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described probe messages transceiver module sends the quick detection message;
Described detection times counter, be used to preserve the maximum probe number of times, receive the count information that described probe messages transceiver module sends, and add 1 operation, when maximum probe number of times that count value itself equals to preserve, send to described probe messages transceiver module and to stop probe message;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
15, a kind of protocol entity equipment of realizing fast detecting comprises regularly sending the sending module that keeps the connection status message to the outside, it is characterized in that this equipment also comprises receiver module and quick detection module;
Described receiver module is used to receive the handshake message that comes from outside maintenance connection status, and when not receiving this message, notice quick detection module is carried out fault-finding on time;
Described quick detection module, be used to receive the notice that described receiver module sends, and the quick detection message sent, also be used to receive outside quick detection response message, and when receiving this message at the appointed time, judge that Link State is normal, when not receiving the quick detection response message at the appointed time, judge that link breaks down.
16, equipment according to claim 15 is characterized in that, described quick detection module comprises: probe messages transceiver module, quick detection wait timeout timer and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and the quick detection message sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, and close described quick detection wait timeout timer, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick detection wait timeout timer is used to receive startup and the shutdown signal that described probe messages transceiver module sends, and the wait timeout time is surveyed in control, and when timer expiry, sends time exceeded message to described probe messages transceiver module;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
17, equipment according to claim 16 is characterized in that, described probe messages transceiver module comprises packet sending and receiving module and quick timer;
Described packet sending and receiving module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, start described quick detection wait timeout timer, also be used under the control of described quick detection wait timeout timer, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, behind the time exceeded message that receives described quick detection wait timeout timer transmission, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described packet sending and receiving module sends the quick detection message.
18, equipment according to claim 15 is characterized in that, described quick detection module comprises: probe messages transceiver module, quick timer, detection times counter and fault verification module;
Described probe messages transceiver module, be used to receive the notice that described receiver module sends, and under the control of described quick timer, regularly the quick detection message is sent, and notify described detection times rolling counters forward when sending the quick detection message each, also be used under the control of described detection times counter, receive outside quick detection response message, when receiving the quick detection response message, notify described fault verification module to receive response, receive that described counter sends stop probe message after, notify described fault verification module not receive response;
Described quick timer is used to control the time interval that described probe messages transceiver module sends the quick detection message;
Described detection times counter, be used to preserve the maximum probe number of times, receive the count information that described probe messages transceiver module sends, and add 1 operation, when maximum probe number of times that count value itself equals to preserve, send to described probe messages transceiver module and to stop probe message;
Described fault verification module is used to receive the notification message that described probe messages transceiver module sends, and message is judged, if this message is to have received the notice of response, judge that then Link State is normal,, judge that then link breaks down if this message is not receive the notice of response.
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| CNB2006101597123A CN100433660C (en) | 2006-09-30 | 2006-09-30 | Method and equipment for realizing fast detection |
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| CN101710896B (en) * | 2009-11-30 | 2012-10-03 | 中国人民解放军信息工程大学 | Method and device for detecting link quality |
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| CN107534576B (en) * | 2015-06-27 | 2020-03-31 | 华为技术有限公司 | Link recovery method and network equipment |
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| CN109873719B (en) * | 2019-02-03 | 2019-12-31 | 华为技术有限公司 | Fault detection method and device |
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