CN101237452B - Transmission method, system and device for bidirectional forward detection report - Google Patents
Transmission method, system and device for bidirectional forward detection report Download PDFInfo
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- CN101237452B CN101237452B CN2008100579042A CN200810057904A CN101237452B CN 101237452 B CN101237452 B CN 101237452B CN 2008100579042 A CN2008100579042 A CN 2008100579042A CN 200810057904 A CN200810057904 A CN 200810057904A CN 101237452 B CN101237452 B CN 101237452B
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Abstract
The invention provides a BFD report sending method, a system and device, wherein, the method comprises the following steps that: after the timer parameter of the first network node changes, a control device in the first network node sends the BFD report with the timer parameter change information to a second network node according to a first presetting space of time, a detection device in the first network node sends the BDF report without the timer parameter change information to the second network node according to a second preset space of time; wherein, the first space of time is more than the second space of time. The control device sends the BDF report with the timer parameter change information in a low-speed period and the detection device sends the BDF report without the timer parameter change information in a high-speed period, thereby reducing the impact of the BFD report with a large amount of timer parameter change information to the control device.
Description
Technical field
The present invention relates to the network communications technology, particularly a kind of two-way forwarding detects sending method, system and the equipment of (BFD, Bidirectional Forwarding Detection) message.
Background technology
Along with development of Communication Technique, on IP network, carry next generation network (NGN), third generation communication system (3G) etc. in real time, the continuous growth of delay sensitive business demand, how to ensure data transmission quality; When promptly how in data transmission procedure, to go wrong; Fast fault is positioned, become very part and parcel, therefore; BFD arises at the historic moment as a kind of fast detection mechanism.
BFD is similar to " Hello " agreement, after BFD session is set up, periodically sends the BFD message to the other side as BFD session both sides' the network equipment according to timer parameter, and wherein, timer parameter is generally the time interval of sending the BFD message; Also on link, periodically detect simultaneously the BFD message that the other side sends,, think that then BFD session both sides link breaks down, thereby reach the purpose of fast detecting link failure if in the time limit of setting, do not receive the BFD message of opposite end.Wherein, timer parameter is consulted to confirm through message interaction when the BFD session is set up, in the BFD session valid period; If the timer parameter of first network node among the BFD session both sides changes; Then send the BFD message that carries the timer parameter change information to second network node, because, when the BFD message carries the timer parameter change information; Usually the inquiry bit in the BFD message (Poll bit) is carried out set; So, the BFD message that carries the timer parameter change information is commonly referred to the BFD message of P bit set, the BFD message that does not carry the timer parameter change information is commonly referred to the BFD message of P bit zero clearing; After second network node is handled this BFD message that carries the timer parameter change information; Return the BFD message that carries the timer parameter response message to first network node; Show that second network node known that the timer parameter of transmit leg changes, because when carrying the timer parameter response message in the BFD message, usually with termination bit (Final bit) set of BFD message; Therefore, the BFD message that carries the timer parameter response message is commonly referred to the BFD message of F bit set; First network node is not when receiving the BFD message of the F bit set that second network node returns; Periodically continue to send the BFD message of P bit set; After first network node receives the BFD message of this F bit set, in the BFD message that sends subsequently with P bit zero clearing.
In the prior art; In order to guarantee that BFD realizes short detection time, 50ms level other detection time for example, in the network equipment, accomplishes the test section that the BFD message receives and dispatches fast usually and be set to an independent device; It is checkout gear; This checkout gear only is responsible for the quick transmitting-receiving of BFD message, and the mutual etc. of the negotiation of the foundation of the configuration of BFD parameter, session, timer parameter and upper layer application all accomplished by control device, wherein; Checkout gear can be in secondary CPU (CPU), network processing unit (NP), the multi-core CPU one nuclear or hardware logic etc., and control device can be a host CPU.The transmission time interval of BFD message that independently makes of checkout gear can reach 10ms; And owing to the parameter negotiation of timer is accomplished by control device; Be that checkout gear need offer control device with the BFD message of the P bit set that receives; Carry out parameter negotiation by control device and handle, and the BFD message of generation Fbit set sends.
Because the processing speed of control device is much more slowly than the packet sending and receiving speed of checkout gear; Therefore; Generate at second network node before the BFD message of F bit set, first network equipment can send the BFD message of a large amount of P bit set, and this will inevitably cause the checkout gear of second network node to receive the BFD message of a large amount of P bit set; On control device is impacted after sending control device, influence the normal process of control device.
Summary of the invention
The invention provides a kind of sending method of BFD message, so that reduce to carry in a large number the impact that the BFD message of timer parameter change information causes control device.
A kind of sending method of BFD message, this method comprises:
After the timer parameter of first network node changes; The BFD message that control device in first network node will carry the timer parameter change information at interval according to the preset very first time sends to second network node, and the BFD message that the checkout gear in first network node will not carry the timer parameter change information according to the second preset time interval sends to second network node;
Wherein, the said very first time is at interval greater than said second time interval.
A kind of transmitting apparatus of BFD message, this equipment comprises: control device and checkout gear;
Said control device is used for after timer parameter changes, and according to preset very first time interval, sends the BFD message that carries the timer parameter change information;
Said checkout gear is used for sending the BFD message that does not carry the timer parameter change information according to the second preset time interval;
Wherein, the said very first time is at interval greater than said second time interval.
A kind of transmitting system of BFD message, this system comprises: first network node and second network node;
Said first network node comprises control device and checkout gear;
Wherein, the control device of first network node is used for after the timer parameter of first network node changes, and the BFD message that will carry the timer parameter change information according to the preset very first time at interval sends to second network node;
The checkout gear of first network node, the BFD message that is used for will not carrying according to the second preset time interval timer parameter change information sends to second network node;
Said second network node is used to receive the said BFD message that carries the BFD message of timer parameter change information and do not carry the timer parameter change information;
Wherein, the said very first time is at interval greater than said second time interval.
Can find out by above technical scheme; In method provided by the invention, system and equipment; Send the BFD message that carries the timer parameter change information by the control device in the network node, simultaneously, the checkout gear in the network node continues to send periodically the BFD message that does not carry the timer parameter change information; To keep the BFD session link between network node; And, this control device send carry the timer parameter change information send the BFD message that does not carry the timer parameter change information interval greater than checkout gear, promptly the cycle is sent the BFD message that carries the timer parameter change information to control device at a slow speed; The checkout gear fast cycle is sent the BFD message that does not carry the timer parameter change information; Reduced the BFD message amount of carrying the timer parameter change information, and adapted to the processing speed of checkout gear more, thereby reduced to carry in a large number of the impact of the BFD message of timer parameter change information control device to the BFD message.
Description of drawings
The method flow diagram that Fig. 1 provides for the embodiment of the invention;
The system construction drawing that Fig. 2 provides for the embodiment of the invention;
The equipment structure chart that Fig. 3 provides for the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, describe the present invention below in conjunction with accompanying drawing and specific embodiment.
Method provided by the invention mainly comprises: after the timer parameter of first network node changes; The BFD message that control device in first network node will carry the timer parameter change information at interval according to the preset very first time sends to second network node, and the BFD message that the checkout gear of first network node will not carry the timer parameter change information according to the second preset time interval sends to second network node; Wherein, the very first time is at interval greater than second time interval.
Second time interval can be the transmission time interval of corresponding checkout gear before timer parameter changes, and also can be the transmission time interval that timer parameter changes the corresponding checkout gear in back.
After the checkout gear of this first network node receives the BFD message that carries the timer parameter response message; This BFD message that carries the timer parameter response message is sent to control device; Control device stops to send the BFD message that carries the timer parameter change information after receiving this BFD message that carries the timer parameter response message; If second time interval was the fixedly transmission time interval that timer parameter changes preceding checkout gear; Then control device notice checkout gear sends the said BFD message that does not carry the timer parameter change information according to the 3rd cycle in the time interval, and the 3rd time interval was the transmission time interval that timer parameter changes the checkout gear of back formation.
Below for convenience, the BFD message that carries the timer parameter change information is called the BFD message of P bit set, the BFD message that does not carry the timer parameter change information is called the BFD message of P bit zero clearing.The BFD message that carries the timer parameter response message that second network node returns is called the BFD message of F bit set.
Wherein, checkout gear can be in aiding CPU, NP, the multi-core CPU one nuclear or hardware logic etc.; Control device can be a host CPU.
Lifting a concrete embodiment below is described in detail method of the present invention.The method flow diagram that Fig. 1 provides for the embodiment of the invention, as shown in Figure 1, this method can may further comprise the steps:
Step 101: when the timer parameter of first network node changes; The control device of first network node is carried at the timer parameter change information in the BFD message of P bit set, and with time interval of 1s at a slow speed the cycle BFD message that sends this P bit set give second network node.Simultaneously, the checkout gear of first network node still sends the BFD message of P bit zero clearing with the time interval fast cycle of 10ms.
In this step, the BFD message that the control device cycle is sent P bit set is to prevent losing of this BFD message, guarantees that second network node can receive the BFD message of this P bit set.
Because it is slower that control device sends the BFD message speed of P bit set; If second network node does not receive the BFD message in setting-up time; Can think BFD conversation with first network node; Therefore, when the control device of first network node sent the BFD message of P bit set, the checkout gear of first network node still kept the BFD session for second network node with the BFD message that the time interval fast cycle of 10ms is sent P bit zero clearing.That is to say no matter whether control device sends the BFD message of Pbit set, checkout gear all can keep fast cycle to send the BFD message of P bit zero clearing.
In this step; The transmission time interval of 1s and 10ms is just at this embodiment that lifts; The present invention does not limit specifically choosing of this transmission time interval; But the transmission time interval of control device must be greater than the transmission time interval of checkout gear, and wherein, the transmission time interval of control device can be chosen according to the concrete disposal ability of control device.The transmission time interval of 10ms is the transmission time interval before timer parameter changes in the present embodiment; If timer parameter changes the transmission time interval of the corresponding checkout gear in back and becomes greatly; Then checkout gear still keeps the transmission time interval before timer parameter changes constant; If timer parameter changes the transmission time interval of the corresponding checkout gear in back and diminishes, then control device can notify checkout gear to adopt timer parameter to change the corresponding transmission time interval in back.
Step 102: second network node detects whether the BFD message receive is the BFD message of P bit set, if then the BFD message of this P bit set is sent to the control device of second network node.
Second network node is still handled by processing mode of the prior art the BFD message of the P bit zero clearing that first network node sends; If promptly in the time limit of setting, do not receive the BFD message of P bit zero clearing, confirm that then the BFD session link of first network node and second network node breaks down; If in the time limit of setting, receive the BFD message of P bit zero clearing, then detect the BFD message that in the time limit of setting, whether receives P bit zero clearing again.
Step 103: after the control device of second network node receives the BFD message of this P bit set, generate the BFD message of F bit set, and the BFD message of this F bit set is sent to first network node.
After control device obtains the timer parameter change information that carries in the BFD message of P bit set, generate the BFD message of F bit set, indicate second network node to know the timer parameter change information.
Step 104: the BFD message that the checkout gear of first network node will receive F bit set sends to the control device of first network node.
Step 105: after the control device of first network node receives the BFD message of F bit set, stop to send the BFD message of P bit set.
After control device stops to send the BFD message of P bit set; Time interval fast cycle according to the change notification checkout gear of timer parameter can be new is sent the BFD message of P bit zero clearing; The new time interval of the checkout gear of formation is 12ms to suppose to change afterwards by timer parameter, and then control device notice checkout gear sends the BFD message of P bit zero clearing with the time interval fast cycle of 12ms.
It more than is description to method provided by the invention; Facing system provided by the invention and equipment down is described in detail; The system construction drawing that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, this system can comprise: first network node 200 and second network node 210.
Wherein, the control device 201 of first network node is used for after the timer parameter of first network node changes, and the BFD message that will carry the timer parameter change information according to the preset very first time at interval sends to second network node 210.
The checkout gear 202 of first network node, the BFD message that is used for will not carrying according to the second preset time interval timer parameter change information sends to second network node 210.
Wherein, the very first time is at interval greater than second time interval.Second time interval was the transmission time interval of corresponding checkout gear before can timer parameter changing, and also can be the transmission time interval that timer parameter changes the corresponding checkout gear in back.The very first time can be chosen according to the concrete disposal ability of control device at interval.
Wherein, second network node can comprise: checkout gear 211 and control device 212.
The checkout gear 211 of second network node; Be used to receive the BFD message that do not carry the timer parameter change information and carry the BFD message of timer parameter change information, and the BFD message that will carry the timer parameter change information sends to the control device 212 of second network node.
For the BFD message that does not carry the timer parameter change information that receives; Handle according to processing mode of the prior art; If promptly in the time limit of setting, do not receive the BFD message that does not carry the timer parameter change information, confirm that then the BFD session link of first network node and second network node breaks down; If in setting-up time, receive the BFD message that does not carry the timer parameter change information, then detect in the time of setting whether receive the BFD message that does not carry the timer parameter change information again.
The control device 212 of second network node, be used to receive the BFD message that carries the timer parameter change information after, send to first network node 200 and to carry the BFD message of timer parameter response message.
The checkout gear 202 of first network node, receive the BFD message that carries the timer parameter response message after, this BFD message that carries the timer parameter response message is sent to the control device 201 of first network node.
The control device 201 of first network node, receive this BFD message that carries the timer parameter response message after, stop to send the BFD message that carries the timer parameter change information.
The equipment structure chart that Fig. 3 provides for the embodiment of the invention, as shown in Figure 3, this equipment can comprise: control device and checkout gear.
Control device is used for after timer parameter changes, and according to preset very first time interval, sends the BFD message that carries the timer parameter change information.
Checkout gear is used for sending the BFD message that does not carry the timer parameter change information according to the second preset time interval;
Wherein, the very first time is at interval greater than second time interval.
In addition, checkout gear can also be used to receive the BFD message that carries the timer parameter response message, and this BFD message that carries the timer parameter response message is sent to control device.
Control device, can also be used to receive the BFD message that carries the timer parameter response message after, stop to send the BFD message that carries the timer parameter change information.
In addition, change preceding corresponding checkout gear transmission time interval if second time interval was a timer parameter, then control device can also be used for after receiving the BFD message that carries the timer parameter response message, sends change notification to checkout gear.
After checkout gear receives change notification, change the corresponding checkout gear transmission time interval in back, send the BFD message that does not carry the timer parameter change information with timer parameter.
Can find out by above description; In method provided by the invention, system and equipment; Send the BFD message that carries the timer parameter change information by the control device in the network node, simultaneously, the checkout gear in the network node continues to send periodically the BFD message that does not carry the timer parameter change information; To keep the BFD session link between network node; And, this control device send carry the timer parameter change information send the BFD message that does not carry the timer parameter change information interval greater than checkout gear, promptly the cycle is sent the BFD message that carries the timer parameter change information to control device at a slow speed; The checkout gear fast cycle is sent the BFD message that does not carry the timer parameter change information; Reduced the BFD message amount of carrying the timer parameter change information, and adapted to the processing speed of checkout gear more, thereby reduced to carry in a large number of the impact of the BFD message of timer parameter change information control device to the BFD message.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (10)
1. a two-way forwarding detects the sending method of BFD message, it is characterized in that this method comprises:
After the timer parameter of first network node changes; The BFD message that control device in first network node will carry the timer parameter change information at interval according to the preset very first time sends to second network node, and the BFD message that the checkout gear in first network node will not carry the timer parameter change information according to the second preset time interval sends to second network node;
Wherein, the said very first time is at interval greater than said second time interval.
2. method according to claim 1 is characterized in that, said second time interval is a checkout gear transmission time interval corresponding before said timer parameter changes.
3. method according to claim 1 and 2 is characterized in that, this method also comprises:
After the checkout gear of said second network node receives the said BFD message that carries the timer parameter change information, this BFD message that carries the timer parameter change information is sent to the control device of second network node;
The control device of said second network node obtains said timer parameter change information, generates the BFD message that carries the timer parameter response message and sends to said first network node.
4. method according to claim 3; It is characterized in that; This method also comprises: after the checkout gear in said first network node receives the BFD message that carries the timer parameter response message, this BFD message that carries the timer parameter response message is sent to the control device of first network node;
After the control device of first network node receives this BFD message that carries the timer parameter response message, stop to send the said BFD message that carries the timer parameter change information.
5. method according to claim 4; It is characterized in that; If second time interval was said timer parameter change before corresponding checkout gear transmission time interval; After the control device of then said first network node receives the BFD message that carries the timer parameter response message, notify the checkout gear of said first network node to send the said BFD message that does not carry the timer parameter change information with the new time interval that said timer parameter changes the checkout gear of back formation.
6. the transmitting apparatus of a BFD message is characterized in that, this equipment comprises: control device and checkout gear;
Said control device is used for after timer parameter changes, and according to preset very first time interval, sends the BFD message that carries the timer parameter change information;
Said checkout gear is used for sending the BFD message that does not carry the timer parameter change information according to the second preset time interval;
Wherein, the said very first time is at interval greater than said second time interval.
7. equipment according to claim 6 is characterized in that, said checkout gear also is used to receive the BFD message that carries the timer parameter response message, and this BFD message that carries the timer parameter response message is sent to said control device;
Said control device, also be used to receive the said BFD message that carries the timer parameter response message after, stop to send the said BFD message that carries the timer parameter change information.
8. equipment according to claim 7 is characterized in that, said control device also is used for after receiving the said BFD message that carries the timer parameter response message, sending change notification to said checkout gear;
Said checkout gear, receive said change notification after, with the new time interval that said timer parameter changes the checkout gear that the back forms, send the said BFD message that does not carry the timer parameter change information.
9. the transmitting system of a BFD message is characterized in that, this system comprises: first network node and second network node;
Said first network node comprises control device and checkout gear;
Wherein, the control device of first network node is used for after the timer parameter of first network node changes, and the BFD message that will carry the timer parameter change information according to the preset very first time at interval sends to second network node;
The checkout gear of first network node, the BFD message that is used for will not carrying according to the second preset time interval timer parameter change information sends to second network node;
Said second network node is used to receive the said BFD message that carries the BFD message of timer parameter change information and do not carry the timer parameter change information;
Wherein, the said very first time is at interval greater than said second time interval.
10. system according to claim 9 is characterized in that, said second network node comprises: checkout gear and control device;
The checkout gear of said second network node; Be used to receive said BFD message and the said BFD message that carries the timer parameter change information that does not carry the timer parameter change information, and the BFD message that will carry the timer parameter change information sends to the control device of said second network node;
The control device of said second network node, be used to receive the said BFD message that carries the timer parameter change information after, send to said first network node and to carry the BFD message of timer parameter response message;
The checkout gear of said first network node, receive the said BFD message that carries the timer parameter response message after, this BFD message that carries the timer parameter response message is sent to the control device of first network node;
The control device of said first network node, receive the said BFD message that carries the timer parameter response message after, stop to send the said BFD message that carries the timer parameter change information.
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| CN112585920A (en) * | 2019-02-22 | 2021-03-30 | 中兴通讯股份有限公司 | Performance measurement using extended bidirectional forwarding control packets |
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| CN102487338B (en) * | 2010-12-01 | 2014-11-05 | 中兴通讯股份有限公司 | Method and device for adjusting bidirectional forwarding detection (BFD) sending interval according to network jitter |
| CN102664726B (en) * | 2012-04-26 | 2015-08-05 | 华为技术有限公司 | Method, master-salve clock equipment and system that clock synchronization compliant with precision time protocol source switches |
| CN106330586A (en) * | 2015-06-29 | 2017-01-11 | 中兴通讯股份有限公司 | Method and device for improving service detection reliability in switch network link |
| CN105791156B (en) * | 2016-03-03 | 2019-03-15 | 盛科网络（苏州）有限公司 | A kind of chip implementing method for supporting a variety of BFD sending times |
| CN109274546B (en) * | 2018-08-07 | 2020-08-14 | 新华三技术有限公司 | Timer scheduling method and device |
| CN110808873B (en) * | 2019-10-21 | 2022-02-22 | 锐捷网络股份有限公司 | Method and device for detecting link failure |
| CN114513433B (en) * | 2022-01-06 | 2023-10-24 | 新华三技术有限公司 | Message processing method and device |
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