CN102025562A - Path detection method and device - Google Patents
Path detection method and device Download PDFInfo
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- CN102025562A CN102025562A CN2010105602682A CN201010560268A CN102025562A CN 102025562 A CN102025562 A CN 102025562A CN 2010105602682 A CN2010105602682 A CN 2010105602682A CN 201010560268 A CN201010560268 A CN 201010560268A CN 102025562 A CN102025562 A CN 102025562A
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Abstract
The invention discloses a path detection method and a device, which can be used for solving the problems of link oscillation and unstable flow caused by bidirectional forwarding detection failure in the active/standby switchover process of a master control board on network equipment. The path detection method of the invention comprises the steps of: periodically sending bidirectional forwarding detection (BFD) control message to opposite terminal network equipment by local network equipment, and performing BFD overtime detection; and when the local network equipment needs to perform active/standby switchover between the master board and the standby board of the master control board, stopping the BFD overtime detection of the local network equipment, and notifying the opposite terminal network equipment to stop the BFD overtime detection, wherein the BFD overtime detection means to detect whether the BFD message sent by the opposite terminal network equipment is received within the preset time.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of path detection method and device.
Background technology
In the IP network communications field, two-way forwarding detects (BFD, Bidirectional Forwarding Detecting) agreement, and the quick fault testing mechanism of a general standardized and medium and protocol-independent is provided.
BFD sets up session on two network equipments, be used for detecting the two-way forward-path of LA Management Room, is the upper layer application service.After session is set up, the network equipment can periodically send the BFD message each other fast, and the overtime detection of BFD, promptly in detection time, do not receive the BFD message of opposite end network equipment transmission when a certain network equipment, then think and this network equipment between two-way forward-path fault has taken place, notify serviced upper layer application to handle accordingly.
In the masterslave switchover process of general mainboard that on the network equipment, carries out master control borad and slave board; for the network element that carries out the overtime detection of BFD in the master control borad on this network equipment; meeting detection for some time is overtime; again hold consultation to rebulid session with the opposite end network equipment more afterwards; and it is overtime to notify the upper-layer service module to detect; therefore can cause upper-layer service to protect operations such as switching; thereby make the link concussion; instability of flow; influence data service; but it is overtime that the BFD that in fact occurs in the masterslave switchover process detects, and might not illustrate that the two-way forward-path between the network equipment has problem.
Summary of the invention
The embodiment of the invention provides a kind of path detection method and device, detects inefficacy in order to solve the two-way forwarding that exists in the masterslave switchover process of carrying out master control borad on the network equipment, causes the problem of link concussion and instability of flow.
A kind of path detection method that the embodiment of the invention provides comprises:
Local network device periodically sends two-way forwarding and detects BFD control message to the opposite end network equipment, and carries out the overtime detection of BFD;
When local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD of local network device, and the notice opposite end network equipment stops the overtime detection of BFD;
Wherein, the overtime detection of described BFD is meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time.
A kind of path detection device that the embodiment of the invention provides comprises:
The BFD processing unit is used for periodically sending two-way forwarding and detects BFD control message to the opposite end network equipment, and carries out the overtime detection of BFD;
The first overtime detection control unit is used for stopping the overtime detection of BFD of local network device when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, and the notice opposite end network equipment stops the overtime detection of BFD;
Wherein, the overtime detection of described BFD is meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time.
The embodiment of the invention, local network device periodically send two-way forwarding and detect BFD control message to the opposite end network equipment, and carry out the overtime detection of BFD; When local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD of local network device, and the notice opposite end network equipment stops the overtime detection of BFD; Wherein, the overtime detection of described BFD, be meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time, thereby solved the two-way forwarding that exists in the masterslave switchover process of on the network equipment, carrying out master control borad and detected inefficacy, caused the problem of link concussion and instability of flow.
Description of drawings
The schematic flow sheet of a kind of path detection method that Fig. 1 provides for the embodiment of the invention;
The network equipment networking schematic diagram that Fig. 2 provides for the embodiment of the invention;
The processing schematic diagram of switching the end network equipment before the masterslave switchover that Fig. 3 provides for the embodiment of the invention;
The path detection handling process schematic diagram of switching the end network equipment that Fig. 4 provides for the embodiment of the invention;
The path detection handling process schematic diagram of the opposite end network equipment that Fig. 5 provides for the embodiment of the invention;
The structural representation of a kind of path detection device that Fig. 6 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of path detection method and device, detects inefficacy in order to solve the two-way forwarding that exists in the masterslave switchover process of carrying out master control borad on the network equipment, causes the problem of link concussion and instability of flow.
The embodiment of the invention, when the masterslave switchover of the mainboard of the master control borad of the network equipment and slave board begins, this network equipment of switching end stops the overtime detection of BFD, and notify the opposite end network equipment to stop the overtime detection of BFD at once, treat that masterslave switchover finishes, switch the end network equipment and recover the overtime detection of BFD, and the notice opposite end network equipment recovers the overtime detection of BFD, solve BFD in the masterslave switchover process in the past and detected and lost efficacy, caused the problems such as link concussion, instability of flow between the network equipment.
The overtime detection of BFD described in the embodiment of the invention is meant that local network device detects the BFD message of whether receiving in Preset Time that the opposite end network equipment sends.
The network equipment described in the embodiment of the invention can be an access device, the also equipment of other types, and in a word, the technical scheme that the embodiment of the invention provides can be used for the network equipment that all support BFD.
Masterslave switchover described in the embodiment of the invention is meant the mainboard of master control borad and the switching of slave board of the network equipment, and promptly master control borad has two, and one is the master control borad of current use, i.e. mainboard, and another is standby master control borad, i.e. slave board.
Below in conjunction with accompanying drawing the technical scheme that the embodiment of the invention provides is described.
Referring to Fig. 1, a kind of path detection method that the embodiment of the invention provides comprises step:
S101, local network device periodically send BFD control message to the opposite end network equipment, and carry out the overtime detection of BFD.
S102, when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD of local network device, and the notice opposite end network equipment stops the overtime detection of BFD.
Preferably, the described local network device notice opposite end network equipment stops the overtime detection of BFD, comprising:
Local network device stops the overtime detection of BFD by the BFD control message notifying opposite end network equipment, wherein carries the information that the indication opposite end network equipment stops the overtime detection of BFD.
Preferably, this method also comprises:
When masterslave switchover was finished, local network device recovered the overtime detection of BFD, and recovered the overtime detection of BFD by sending the BFD control message notifying opposite end network equipment.
Preferably, when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, this method also comprised: start default active and standby overtime timer;
When masterslave switchover was finished, local network device recovered the overtime detection of BFD, comprising:
When active and standby overtime timer was overtime, local network device recovered the overtime detection of BFD.
The active and standby overtime timer of presetting in the embodiment of the invention, be mainly used in the monitoring required time of masterslave switchover, under normal circumstances, local network device is finished masterslave switchover, then recovers the overtime detection of BFD immediately, but if finish masterslave switchover, and do not recover the overtime detection of BFD immediately, and then utilizing active and standby overtime timer, control recovers the overtime detection of BFD, be active and standby overtime timer when overtime, recover the overtime detection of BFD immediately.The timing length of active and standby overtime timer can be set to masterslave switchover required maximum time, for example: 20 seconds or 30 seconds etc.
Preferably, this method also comprises:
Local network device when receive that the opposite end network equipment sends stop the notice of the overtime detection of BFD the time, stop the overtime detection of BFD, and start unusual overtime timer;
Local network device perhaps, when unusual overtime timer is overtime, recovers the overtime detection of BFD when the notice of receiving the overtime detection of recovery BFD that the opposite end network equipment sends.
The unusual overtime timer of presetting in the embodiment of the invention of startup, be mainly used in the monitoring required time of masterslave switchover, under normal circumstances, local network device is finished masterslave switchover, then recover the overtime detection of BFD immediately, and the notice opposite end network equipment recovers the overtime detection of BFD, but if finish masterslave switchover, and do not notify the opposite end network equipment to recover the overtime detection of BFD immediately, perhaps the opposite end network equipment is not received the notice of recovering the overtime detection of BFD for a certain reason, and then the opposite end network equipment can utilize unusual overtime timer, and control recovers the overtime detection of BFD, be unusual overtime timer when overtime, recover the overtime detection of BFD immediately.
The timing length of unusual overtime timer also can be set to masterslave switchover required maximum time, for example: 20 seconds or 30 seconds etc.
Provide concrete illustrating below.
The networking structure of a kind of network equipment that the embodiment of the invention provides comprises as shown in Figure 2: first network equipment and second network equipment, and all support BFD function and corresponding upper layer application business function.Suppose that first network equipment is a masterslave switchover end equipment, second network equipment is an opposite equip..
When first network equipment and second network equipment operate as normal, between first network equipment and second network equipment, create the BFD session, send BFD control message mutually, detect the connectedness of link between them.In case the link fails between first network equipment and second network equipment, the BFD session detects overtime, then notifies upper layer application session DOWN, and promptly link failure carries out respective handling by upper layer application.
Before the masterslave switchover, switch the end first network equipment processing as shown in Figure 3.Mainboard (master control borad A) is carried out the transmitting-receiving and the protocol processes of BFD control message, slave board (master control borad B) transmit status position (Sta) is changed to the BFD control message that the overtime detection of BFD was lost efficacy, its time parameter is identical with the time parameter that mainboard sends BFD control message, but the exchange chip on the slave board is not done to send and is handled, up to the message (promptly beginning masterslave switchover) of receiving the slave board change mainboard that mainboard sends, the BFD control message that then immediately the overtime detection of BFD was lost efficacy sends to upper united mouth (the BFD control message of mainboard and slave board is is all received and dispatched by the upper united mouth), sends to second network equipment by the upper united mouth.So that after slave board becomes mainboard, can send in the notice that the very first time will stop the overtime detection of BFD, notify second network equipment, first network equipment that masterslave switchover has taken place.Parameters such as the BFD session status of the synchronous mainboard of slave board, time.
Wherein, described time parameter, comprise the time interval (for example 100 milliseconds) that sends BFD control message, the time interval (for example 100 milliseconds) of the minimum BFD of reception control message, and the detection time of the overtime detection of BFD, for example 300 milliseconds, promptly in this time, do not control message, then notify upper layer application to carry out relevant treatment if receive the BFD that second network equipment sends.
After creating the BFD session, beginning timed sending state position (promptly stops the overtime detection of BFD for detecting to lose efficacy on the slave board, for example the value of mode bit is set to 0, and expression stops the overtime detection of BFD) BFD control message, but these messages do not send to second network equipment.After masterslave switchover began, first network equipment stopped the overtime detection of BFD, and slave board gets started and sends this BFD control message to second network equipment, can learn as early as possible that to guarantee second network equipment first network equipment has carried out masterslave switchover.And enable active and standby overtime timer, the overtime detection of BFD is recovered in overtime back, sends BFD control message according to original session status, parameter etc., to avoid abnormality occurring behind the masterslave switchover.
Referring to Fig. 4, in the masterslave switchover process, master control borad B keeps original BFD session, stops the overtime detection of BFD, no longer reports BFD session DOWN, will detect the inefficacy message at once and send.And enable active and standby overtime timer, the time finishes to back or masterslave switchover, then recovers the overtime detection of BFD, sends BFD control message according to original session status, parameter etc.After the masterslave switchover of first network equipment is finished, stop to send the control message that the overtime detection of BFD was lost efficacy, continue to send BFD control message according to session status, parameter etc. before the masterslave switchover.And behind the BFD control message of receiving the overtime detection inefficacy of first non-BFD that second network equipment sends, recover the overtime detection of BFD, perhaps also can set in advance a timer, when timer expiry, recover the overtime detection of BFD, to prevent that entering abnormality can't recover normal overtime detection.
First network equipment continues to send BFD control message according to the BFD session status before switching, parameter etc. the i.e. BFD of normal condition control message after masterslave switchover is finished.
Referring to Fig. 5, after second network equipment is received the BFD control message of the overtime detection inefficacy of BFD, stop to carry out the overtime detection of BFD, the BFD that sends the overtime detection inefficacy of BFD according to original parameter controls message to first network equipment, has stopped carrying out the overtime detection of BFD to notify first network equipment, second network equipment.And start a unusual overtime timer, after receiving the BFD control message of normal condition or unusual overtime timer recover the overtime detection of BFD when overtime, avoiding recovering the abnormal conditions of the overtime detection of BFD, and send BFD control message according to original state.
Wherein, the processing of first network equipment BFD control message that overtime detection was lost efficacy for BFD can be adopted dual mode:
A kind of is that first network equipment begins the back with regard to periodically sending this message at masterslave switchover, finishes or active and standby timer expiry up to masterslave switchover, stops to send this message, transfers the BFD control message that sends normal condition to;
Another kind is that first network equipment just periodically sends this message after masterslave switchover begins, up to the BFD control message of receiving the overtime detection inefficacy of BFD that second network equipment sends, illustrate that second network equipment has stopped the overtime detection of BFD, then switch end equipment and stop to send the BFD control message of the overtime detection inefficacy of BFD to opposite equip..
Through above processing, one-port equipment has been skipped the overtime detection of BFD during masterslave switchover, avoids having strengthened the stability and the reliability of link owing to detect the problems such as the link that causes shakes, data service is influenced that lost efficacy.
Referring to Fig. 6, a kind of path detection device that the embodiment of the invention provides comprises:
The first overtime detection control unit 102 is used for stopping the overtime detection of BFD of local network device when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, and the notice opposite end network equipment stops the overtime detection of BFD.
Wherein, the overtime detection of described BFD is meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time.
Preferably, the described first overtime detection control unit 102 comprises:
Stop element 201 is used for stopping the overtime detection of BFD of local network device when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board;
Preferably, the described first overtime detection control unit 102 also comprises:
Preferably, the described first overtime detection control unit 102 also comprises:
Start timer units 204, be used for when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, starting the active and standby overtime timer of presetting.
Described recovery unit 203 when the active and standby overtime timer of described startup timer units 204 startups is overtime, recovers the overtime detection of BFD.
Preferably, this device also comprises:
The second overtime detection control unit 103, be used for when receive that the opposite end network equipment sends stop the notice of the overtime detection of BFD the time, stop the overtime detection of BFD, and start unusual overtime timer; When the notice of receiving the overtime detection of recovery BFD that the opposite end network equipment sends, perhaps, when this unusual overtime timer is overtime, recover the overtime detection of BFD.
In sum, in the embodiment of the invention, local network device periodically sends two-way forwarding and detects BFD control message to the opposite end network equipment, and carries out the overtime detection of BFD; When local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD of local network device, and the notice opposite end network equipment stops the overtime detection of BFD, thereby solved the two-way forwarding that exists in the masterslave switchover process of on the network equipment, carrying out master control borad and detected inefficacy, caused the problem of link concussion and instability of flow.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a path detection method is characterized in that, this method comprises:
Local network device periodically sends two-way forwarding and detects BFD control message to the opposite end network equipment, and carries out the overtime detection of BFD;
When local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD of local network device, and the notice opposite end network equipment stops the overtime detection of BFD;
Wherein, the overtime detection of described BFD is meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time.
2. method according to claim 1 is characterized in that, the described local network device notice opposite end network equipment stops the overtime detection of BFD, comprising:
Local network device stops the overtime detection of BFD by the BFD control message notifying opposite end network equipment, wherein carries the information that the indication opposite end network equipment stops the overtime detection of BFD.
3. method according to claim 2 is characterized in that, this method also comprises:
When described masterslave switchover was finished, local network device recovered the overtime detection of BFD, and recovered the overtime detection of BFD by sending the BFD control message notifying opposite end network equipment.
4. method according to claim 3 is characterized in that, when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, this method also comprised: start default active and standby overtime timer;
When described masterslave switchover was finished, local network device recovered the overtime detection of BFD, comprising:
When described active and standby overtime timer was overtime, local network device recovered the overtime detection of BFD.
5. according to the described method of the arbitrary claim of claim 1-4, it is characterized in that this method also comprises:
Local network device when receive that the opposite end network equipment sends stop the notice of the overtime detection of BFD the time, stop the overtime detection of BFD, and start unusual overtime timer;
Local network device perhaps, when described unusual overtime timer is overtime, recovers the overtime detection of BFD when the notice of receiving the overtime detection of recovery BFD that the opposite end network equipment sends.
6. a path detection device is characterized in that, this device comprises:
The BFD processing unit is used for periodically sending two-way forwarding and detects BFD control message to the opposite end network equipment, and carries out the overtime detection of BFD;
The first overtime detection control unit is used for stopping the overtime detection of BFD of local network device when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, and the notice opposite end network equipment stops the overtime detection of BFD;
Wherein, the overtime detection of described BFD is meant whether detection receives the BFD message that the opposite end network equipment sends in Preset Time.
7. device according to claim 6 is characterized in that, the described first overtime detection control unit comprises:
Stop element is used for stopping the overtime detection of BFD of local network device when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board;
Notification unit, local network device is used for when need carry out the mainboard of master control borad and the masterslave switchover between the slave board, stop the overtime detection of BFD by the BFD control message notifying opposite end network equipment, wherein carry the information that the indication opposite end network equipment stops the overtime detection of BFD.
8. device according to claim 7 is characterized in that, the described first overtime detection control unit also comprises:
Recovery unit is used for when described masterslave switchover is finished, and recovers the overtime detection of BFD, and recovers the overtime detection of BFD by sending the BFD control message notifying opposite end network equipment.
9. device according to claim 8 is characterized in that, the described first overtime detection control unit also comprises:
Start timer units, be used for when local network device need carry out the mainboard of master control borad and the masterslave switchover between the slave board, starting the active and standby overtime timer of presetting;
Described recovery unit when described active and standby overtime timer is overtime, recovers the overtime detection of BFD.
10. according to the described device of the arbitrary claim of claim 6-9, it is characterized in that this device also comprises:
The second overtime detection control unit, be used for when receive that the opposite end network equipment sends stop the notice of the overtime detection of BFD the time, stop the overtime detection of BFD, and start unusual overtime timer; When the notice of receiving the overtime detection of recovery BFD that the opposite end network equipment sends, perhaps, when described unusual overtime timer is overtime, recover the overtime detection of BFD.
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Application publication date: 20110420 |