CN106301867A - A kind of static pseudo-wire condition detection method and device - Google Patents
A kind of static pseudo-wire condition detection method and device Download PDFInfo
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- CN106301867A CN106301867A CN201510323636.4A CN201510323636A CN106301867A CN 106301867 A CN106301867 A CN 106301867A CN 201510323636 A CN201510323636 A CN 201510323636A CN 106301867 A CN106301867 A CN 106301867A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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Abstract
The invention discloses a kind of static pseudo-wire condition detection method and device, be respectively started keep-alive intervalometer including the first edge device and the second edge device, and send pseudo-wire state-detection message to opposite end；First edge device or the second edge device, according to the keep-alive timer state of self when receiving pseudo-wire state-detection message, determine that the forwarding state of current static pseudo-wire is the most effective；Wherein, the first edge device and the second edge device are the edge device being in static pseudo-wire two ends.The technical scheme that the present invention provides, by introducing pseudo-wire state-detection message in customer flow repeating process, just as heartbeat signal, achieves the detection of forwarding state to static pseudo-wire simply.
Description
Technical field
The present invention relates to Pseudo Wire Emulation Edge-to-Edge technology, espespecially a kind of static pseudo-wire condition detection method and dress
Put.
Background technology
Pseudo Wire Emulation Edge-to-Edge (PWE3, Pseudo-Wire Emulation Edge-to-Edge) is to divide
Tunnel is provided, in order to emulate some business such as frame relay (FR, Frame in group switching network (IP/MPLS)
Relay), asynchronous transfer mode (ATM, Asynchronous Transfer Mode), Ethernet
(Ethernet), time division multiplexing (TDM), Optical synchronization digital transmission (SONET/SDH) etc.
Two-layer virtual private network (VPN) agreement.By PWE3 agreement, can by traditional network with
Packet switching network interconnects, thus realizes sharing and the expansion of network of resource.
Pseudo-wire (PW, Pseudo Wire) is the VLL technology of a kind of point-to-point, is provided by pseudo-wire
The transparent transmission service of Layer 2 data, such as Ethernet service, FR service and ATM etc., can pass through will
Corresponding two layer message form is carried out in special package, and the pseudo-wire set up between provider edge equipment
Carry out transparent transmission.Operator is by disposing this transparent transmission service, it is ensured that separate identical in different geographical
Isolation between connectedness and the different user of client.
Fig. 1 is the network reference model schematic diagram of an existing typical pseudo-wire, as it is shown in figure 1, certain is used
The customer edge 1 (CE1) of the LAN 1 at family is linked into operation by access link 1 (AC1)
The edge device 1 (PE1) of business's multiprotocol label switching (MPLS) backbone network；The local of this user
The customer edge 2 (CE2) of net 2 is linked into operator MPLS by access link 2 (AC2)
The edge device 2 (PE2) of backbone network；Operator is this service deployment one between PE1 and PE2
Pseudo-wire.Pseudo-wire is a pair unidirectional label forwarding path in opposite direction (LSP, Label Switch Path)
Set, such as the single hop pseudo-wire (SSPW) in Fig. 1.As it is shown in figure 1, the message of CE1 to CE2
Repeating process generally comprises: the message in the LAN 1 of this user sent from AC1 is packaged into puppet
The protocol Data Unit (PDU) of line, passes through the PE2 of opposite end by this pseudo-wire；When message arrives PE2
Time, PE2 again reverts to local form after processing locality, and is forwarded to this user's by AC2
In the network of LAN 2.The message of CE2 to CE1 forwards similar with said process, the most superfluous
State.
Pseudo-wire is divided into dynamic pseudo-wire and static pseudo-wire according to its mode set up, and wherein, dynamic pseudo-wire refers to
Extended by PWE3 signaling, such as tag distribution protocol (LDP, Label Distribution Protocol)
Mode or Border Gateway Protocol (BGP, Border Gateway Protocol) extended mode complete puppet
The distribution of line label and the negotiation of parameter；And static state pseudo-wire refers to manually specify forwarding label for certain pseudo-wire,
This process is not required to the negotiation of signaling, completely by operator's planning and static deployment.
The dynamic pseudo-wire set up by PWE3 signaling, maintainability and autgmentability are relatively good, however it is necessary that volume
Outer signaling consumption；And static state pseudo-wire, the labeling requirement operator of each pseudo-wire plans and distributes, its
Configure comparatively laborious, and maintainable poor, but, on the one hand, owing to the deployment of static pseudo-wire is not required to
Wanting PWE3 signaling to set up and state-maintenance, therefore, the mode of static pseudo-wire is applicable to accessing the low of side
End equipment room sets up pseudo-wire.Such as, at current packet network (PTN, Packet Transport
Network), on access ring, use is all the couple in router of low side, does not the most possess dynamic PWE3
Protocol function, is now accomplished by by the way of disposing static pseudo-wire completing BTS service to convergence-level/core
The transmission of central layer；On the other hand, owing to the foundation of static pseudo-wire does not has any control protocol, so, when
When certain equipment on whole pseudo-wire path or link break down, the PE being in pseudo-wire edge is cannot
Perceive, say, that in this case cannot be switched in standby pseudo-wired link, and final
Cause the interruption of user's flow process.
At present, in order to detect static pseudo-line states, feasible technical scheme may be considered as static pseudo-wire portion
Affix one's name to (BFD, the Bidirectional Forwarding Detection) technology of two-way converting detection end to end,
It is responsible for the detection of pseudo-line states.But, owing to this router mentioned above is the access route of low side
Device, therefore, it is possible to the router disposing static pseudo-wire does not possess BFD function, and, when static pseudo-
When line is disposed more, equipment itself can not bear disposes the process expense that BFD technology is brought.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of static pseudo-wire condition detection method and device,
Can the simple realization detection to static pseudo-line states.
In order to reach the object of the invention, the invention provides a kind of static pseudo-wire condition detection method, including:
First edge device and the second edge device are respectively started keep-alive intervalometer, and send pseudo-wire to opposite end
State-detection message；
First edge device or the second edge device are according to the guarantor of self when receiving pseudo-wire state-detection message
Active timer state, determines that the forwarding state of current static pseudo-wire is the most effective；
Wherein, the first edge device and the second edge device are the edge device being in static pseudo-wire two ends.
Alternatively, also include before the method: at described first edge device and described second edge device
Upper enable pseudo-wire status detection function respectively.
Alternatively, also include before the method: be configured to send pseudo-wire state-detection report to described opposite end
The pseudo-wire state-detection message of literary composition sends cycle, and the duration of described keep-alive intervalometer；
Wherein, time a length of pseudo-wire state-detection message of described keep-alive intervalometer sends the preset value N in cycle
Times, or the value of configuration, N is the natural number more than 1.
Alternatively, described starting protection intervalometer includes:
Described keep-alive intervalometer is opened during described enable pseudo-wire status detection function；Or,
Described keep-alive intervalometer is opened when receiving first pseudo-wire state-detection message from opposite end.
Alternatively, described pseudo-wire state-detection message needs the control carried for distinguishing different type of message
Word processed；
Wherein, control word at least includes the identification field for representing type of message.
Alternatively, described control word also includes the reserved Reserved field for subsequent expansion.
Alternatively, described control word also includes: be used for carrying described first edge device or described second limit
The detection messages that edge equipment self is arranged sends the pseudo-wire state-detection message in cycle and sends period field, with
And for carrying the keep-alive intervalometer of described first edge device or described second edge device self setting
The keep-alive timer duration field of duration.
Alternatively, the method also includes:
If described first edge device or described second edge device determine the pseudo-wire state-detection received
The pseudo-wire state-detection message of the opposite end carried in message sends cycle and the duration of keep-alive intervalometer, with oneself
The pseudo-wire state-detection message that body is arranged sends the duration of cycle and/or keep-alive intervalometer and differs, and assists
Business is identical to guarantee.
Alternatively, the described forwarding state determining current static pseudo-wire the most effectively includes:
Described first edge device or described second edge device are according to the pseudo-wire state-detection message received
Identification field in control word determines that this message is pseudo-wire state-detection message,
And the keep-alive intervalometer of described first edge device or described second edge device self has not timed out, then
The forwarding state determining current static pseudo-wire is effective, resets the keep-alive intervalometer of self.
Alternatively, if described first edge device or described second edge device are in self keep-alive timing
After device time-out, not receiving described pseudo-wire state-detection message, the method also includes:
Determine that the forwarding state of current static pseudo-wire, for losing efficacy, and closes the keep-alive intervalometer of self.
Alternatively, the method also includes: described first edge device or described second edge device receive
From opposite end pseudo-wire state-detection message, restart the keep-alive intervalometer of self.
Alternatively, described first edge device or described second edge device determine current static pseudo-wire
When forwarding state was for losing efficacy, also include:
Described first edge device or described second edge device linkage customer edge access connecing of self
Incoming link, forbids this customer edge converting flow.
Alternatively, described first edge device or described second edge device determine current static pseudo-wire
Before forwarding state was for losing efficacy, the method also includes:
Described first edge device or described second edge device perceive the customer edge being connected with self and set
Access link or customer edge itself between Bei break down, described first edge device or described
Second edge device stops sending described pseudo-wire state-detection message.
Present invention also offers a kind of static pseudo-wire condition checkout gear, at least include time block, first
Processing module；Wherein,
Time block, is wherein configured with keep-alive intervalometer, is used for starting keep-alive intervalometer；
First processing module, for sending pseudo-wire state-detection message to opposite end；According to receiving from right
During the pseudo-wire state-detection message held, the keep-alive timer state of self, determines the forwarding of current static pseudo-wire
State is the most effective.
Alternatively, described timer module is additionally operable to, and notifies described when described keep-alive timer expiry
One processing module；Receive the reset notification from described first processing module, restart described keep-alive
Intervalometer；
Described first processing module specifically for, according to configuration pseudo-wire state-detection message send the cycle,
Periodically generate pseudo-wire state-detection message, and be sent to opposite end；According to the puppet from opposite end received
Identification field in the control word of line states detection messages determines that message is pseudo-wire state-detection message, and from
The keep-alive intervalometer of body has not timed out, and determines that the forwarding state of current static pseudo-wire is effective；To described fixed
Time module output reset described keep-alive intervalometer reset notification.
Alternatively, described first processing module is additionally operable to: receives the expression from described time block and protects
The notice of active timer time-out, and do not receive pseudo-wire state-detection message, determine current static pseudo-wire
Forwarding state was for losing efficacy；Notify that described time block closes keep-alive intervalometer.
Alternatively, described first processing module is additionally operable to: receive the pseudo-wire state-detection message from opposite end,
Again judge that the forwarding state of current pseudo-wire is effective, notify described time block, to trigger described timing mould
Block starts keep-alive intervalometer.
Alternatively, described first processing module is additionally operable to: when the pseudo-wire state-detection from opposite end received
When message carries the duration that pseudo-wire state-detection message sends cycle and keep-alive intervalometer, if self
The pseudo-wire state-detection message arranged sends cycle and/or the duration of keep-alive intervalometer and differing of opposite end,
Hold consultation to guarantee identical.
Alternatively, also include enabling module, be used for enabling pseudo-wire status detection function, and enable is indicated
Export to described time block, to trigger described time block startup keep-alive intervalometer.
Alternatively, described first processing module is additionally operable to, and receives first pseudo-line states from opposite end
Detection messages, notifies described time block, to trigger described time block startup keep-alive intervalometer.
Alternatively, this device also includes: the second processing module；Now,
Described first processing module is additionally operable to, when the forwarding state determining current static pseudo-wire is to lose efficacy,
Notify the second processing module；
Second processing module is used for: linkage customer edge accesses the access link of self, forbids this use
Family edge device converting flow.
Alternatively, described first processing module is additionally operable to, and perceives the customer edge being connected with self
Between access link or customer edge itself break down, stop send described pseudo-wire state-detection
Message.
Alternatively, this device is independent community, or is arranged on static pseudo-wire or the limit at static pseudo-line segment two ends
In edge equipment.
Compared with prior art, technical scheme includes that the first edge device and the second edge device divide
Not Qi Dong keep-alive intervalometer, and to opposite end send pseudo-wire state-detection message；First edge device or second
Edge device, according to the keep-alive timer state of self when receiving pseudo-wire state-detection message, determines current
The forwarding state of static pseudo-wire is the most effective；Wherein, the first edge device and the second edge device are for being in
The edge device at static pseudo-wire two ends.The technical scheme that the present invention provides, by forwarded at customer flow
Journey introduces pseudo-wire state-detection message, just as heartbeat signal, achieves simply static pseudo-wire
The detection of forwarding state.
Further, the edge device receiving pseudo-wire state-detection message can be according to the pseudo-wire wherein carried
State-detection message sends cycle and the duration of keep-alive intervalometer, it is judged that the pseudo-wire state-detection that self is arranged
It is the most identical with opposite end with the duration of keep-alive intervalometer, if difference can be done into one that message sends the cycle
Step is consulted, to ensure that the pseudo-wire state-detection message of the edge device at static pseudo-wire two ends sends cycle and guarantor
The duration of active timer keeps consistent, and then better assures that the reliability of static pseudo-wire state-detection.
Other features and advantages of the present invention will illustrate in the following description, and, partly from froming the perspective of
Bright book becomes apparent, or understands by implementing the present invention.The purpose of the present invention is excellent with other
Point can be realized by structure specifically noted in description, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes of the application
Point, the schematic description and description of the present invention is used for explaining the present invention, is not intended that the present invention's
Improper restriction.In the accompanying drawings:
Fig. 1 is the network reference model schematic diagram of an existing typical pseudo-wire；
Fig. 2 is the flow chart of static state pseudo-wire condition detection method of the present invention；
Fig. 3 is the control word format schematic diagram of pseudo-wire state-detection message of the present invention；
Fig. 4 is the network reference model signal of the first embodiment of static state pseudo-wire condition detection method of the present invention
Figure；
Fig. 5 is the network reference model signal of the second embodiment of static state pseudo-wire condition detection method of the present invention
Figure；
Fig. 6 is the network reference model signal of the 3rd embodiment of static state pseudo-wire condition detection method of the present invention
Figure；
Fig. 7 is the network reference model signal of the 4th embodiment of static state pseudo-wire condition detection method of the present invention
Figure；
Fig. 8 is the composition structural representation of static state pseudo-wire condition checkout gear of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing
Embodiments of the invention are described in detail.It should be noted that in the case of not conflicting, this Shen
Embodiment in please and the feature in embodiment can mutual combination in any.
Fig. 2 is the flow chart of static state pseudo-wire condition detection method of the present invention, as in figure 2 it is shown, the first edge
Equipment and the second edge device are to be in static pseudo-wire or the edge device at static pseudo-line segment two ends, Ke Yishi
PE, it is also possible to be SPE；Including:
Step 200: the first edge device and the second edge device are respectively started keep-alive intervalometer, and to right
End sends pseudo-wire state-detection message.
Also include before this step: at edge device that is first edge device at the two ends setting up static pseudo-wire
With on the second edge device, enable pseudo-wire status detection function respectively.Specifically,
On the first edge device and the second edge device, can give tacit consent to and be not turned on pseudo-wire state-detection merit
Can, if it is desired, can be configured by order line or the mode such as webmaster issues enable operation, to open
Pseudo-wire status detection function, implements the conventional techniques means belonging to those skilled in the art, the most not
Repeat again.It is of course also possible to give tacit consent to always on pseudo-wire status detection function.
Further, when enabling pseudo-wire status detection function, also include:
Configuration pseudo-wire state-detection message sends cycle and keep-alive intervalometer.Wherein, pseudo-wire state-detection report
The literary composition transmission cycle is necessary configuration item, and it is the least that pseudo-wire state-detection message sends the cycle, shows pseudo-line states
The response speed of detection is the fastest；Time a length of optional configuration item of keep-alive intervalometer, if do not configured, then gives tacit consent to
Time a length of pseudo-wire state-detection message of keep-alive intervalometer sends preset value N times (such as N=3) in cycle,
If configuration, that is, the value of configuration.
In step 200, start keep-alive intervalometer and specifically include:
Keep-alive intervalometer is opened immediately after enabling pseudo-wire status detection function；Or,
It is then turned on keep-alive intervalometer when receiving first pseudo-wire state-detection from opposite end.This mode
The operating time of the edge device enable pseudo-wire status detection function that efficiently avoid static pseudo-wire two ends is poor
The problem that detection state that is excessive and that cause is reported by mistake.
In step 200, send pseudo-wire state-detection message to opposite end and specifically include:
Pseudo-wire state-detection message according to configuration sends the cycle, periodically generates pseudo-wire state-detection report
Literary composition, and it is sent to opposite end.Wherein,
It is user's message or pseudo-wire to allow the edge device of static pseudo-wire identify the message received
State detection messages, needs the control word carried for distinguishing different type of message in pseudo-wire state-detection message,
So that the pseudo-wire state-detection message received can be identified by the edge device at static pseudo-wire two ends and
Process.Fig. 3 is the control word format schematic diagram of pseudo-wire state-detection message of the present invention, as it is shown on figure 3,
Control word at least includes:
For representing the identification field of type of message.In existing protocol front the 4 of domestic consumer's message control word
Position be 0000, therefore, in the control word of pseudo-wire state-detection message as 4 bits can be defined as
1000, represent that this message is pseudo-wire state-detection message rather than user's message.
Further, the control word of pseudo-wire state-detection message could be included for the reserved of subsequent expansion
(Reserved) field, the reserved field of such as 12 bits.
Further, in order to better ensure that the pseudo-wire state-detection report of the edge device at static pseudo-wire two ends
The literary composition transmission cycle keeps consistent with the duration of keep-alive intervalometer, can be in the control of pseudo-wire state-detection message
Word farther includes: the detection messages arranged for carrying edge device self sends the pseudo-wire in cycle
State detection messages sends cycle (Interval Time) field, and is used for carrying edge device self setting
Keep-alive timer duration (KeepAlive Time) field of duration of keep-alive intervalometer, such as, Interval
Time field and KeepAlive Time field can respectively account for 1 byte.
As it is shown on figure 3, as a example by the length of control word is set to 4 bytes (32 bit), front 4
Bit is identification field, and 12 bits after identification field are reserved (Reserved) field, write down characters in advance
It is Interval Time field and the KeepAlive Time field respectively accounting for 1 byte respectively after Duan.
When each pseudo-wire state-detection message sends cycle arrival, the generation puppet line states in step 200
Detection messages includes:
Construct a pseudo-wire state-detection message according to the control word structure shown in Fig. 3, and give pseudo-line states
The heading of detection messages stamps pseudo line tag and outer layer tunnel label, to ensure this pseudo-wire detection messages
The forward-path of forward-path and actual user's message is completely the same.
Step 201: the first edge device or the second edge device are according to receiving pseudo-wire state-detection message
The keep-alive timer state of Shi Zishen, determines that the forwarding state of current static pseudo-wire is the most effective.
This step specifically includes:
First edge device or the second edge device are according in the control word of the pseudo-wire state-detection message received
Identification field determine that this message is user's message or pseudo-wire state-detection message:
If user's message, according to the processing mode of existing subscriber's message, continue to enter to user side equipment
Row forwards operation.
If pseudo-wire state-detection message, and the first edge device or the keep-alive of the second edge device self
Intervalometer has not timed out, it is determined that the forwarding state going out current static pseudo-wire is effective；Meanwhile, the first edge
Equipment or the second edge device reset the keep-alive intervalometer of self, and etc. the next one to be received from opposite end
Pseudo-wire state-detection message.
Further,
If the first edge device or the second edge device are after the keep-alive timer expiry of self, still do not have
Receive pseudo-wire state-detection message, it is determined that the forwarding state going out current static pseudo-wire is inefficacy, and closes
Close the keep-alive intervalometer of self.After pseudo-line states is defined as losing efficacy, further,
If the first edge device or the second edge device receive the pseudo-wire state-detection report from opposite end again
Literary composition, then it represents that current pseudo-wired link is good, it is possible to determine that the forwarding state of static pseudo-wire reverts to again
Effectively, now, the inventive method also includes: the first edge device or the second edge device restart keep-alive
Intervalometer, continues the pseudo-wire state-detection message that detection is follow-up.Further, here, it is also possible to arrange
Certain recovery policy, such as continuously receives preset number such as 3 pseudo-wire state-detection messages and just sentences
The forwarding state of fixed static pseudo-wire reverts to effectively, as such, it is possible to avoid pseudo-line states wrong report well,
And suppress the oscillation problem of pseudo-line states.
Static state pseudo-wire condition detection method of the present invention, by introducing pseudo-wire in customer flow repeating process
State detection messages, just as heartbeat signal detects, achieves the forwarding state to static pseudo-wire simply
Detection, and without for pseudo-wire dispose additional detections technology.
Further,
If pseudo-wire state-detection message carrying pseudo-wire state-detection message send cycle and keep-alive timing
The duration of device, the inventive method also includes:
Receive edge device that is first edge device or second edge device of pseudo-wire state-detection message, can
Cycle and the duration of keep-alive intervalometer is sent with the pseudo-wire state-detection message according to the opposite end wherein carried,
Judge the pseudo-wire state-detection message that self arranges send the duration of cycle and/or keep-alive intervalometer whether with
Opposite end identical, if difference can be held consultation to guarantee identical, such as: agreement takes both devices
A value less in the pseudo-wire state-detection message transmission cycle is as the pseudo-wire state-detection message after consulting
The transmission cycle, with ensure the pseudo-wire state-detection message of the edge device at static pseudo-wire two ends send the cycle and
The duration of keep-alive intervalometer keeps consistent, and then better assures that the reliability of static pseudo-wire state-detection.
Further,
When the first edge device or the second edge device determine that the forwarding state of current static pseudo-wire was for losing efficacy
Time, the inventive method includes:
First edge device or the second edge device linkage customer edge access the access link of self,
Forbid this customer edge converting flow.Implement the known technology belonging to those skilled in the art,
The protection domain being not intended to limit the present invention, repeats no more here.
Further,
Determine that the forwarding state of current static pseudo-wire was for losing efficacy at the first edge device or the second edge device
Before, the method also includes:
First edge device or the second edge device perceive between the customer edge being connected with self
Access link or customer edge itself break down, and the first edge device or the second edge device are actively
Stop sending pseudo-wire state-detection message.
Below in conjunction with embodiment, static pseudo-wire condition detection method and the flow control methods of the present invention are carried out
Describe in detail.
Fig. 4 is the network reference model signal of the first embodiment of static state pseudo-wire condition detection method of the present invention
Figure, first embodiment is as a example by the scene of static pseudo-line states and the linkage of access side, as shown in Figure 4, false
Static pseudo-wire PW12 (as shown in figure bend shade) is erected if built between PE1 and PE2.With CE1
As a example by being sent to the flow of CE2, CE1 customer flow is sent to PE1, the PE1 user to sending on CE1
Flow carries out pseudo-wire encapsulation, is delivered to PE2 by middle P equipment (including P1 and P2)；PE2
Peel off pseudo-wire encapsulation, recover the user's message of CE1, be transmitted to CE2.
After enabling pseudo-wire status detection function on PE1 and PE2, PE1 and PE2 is all in accordance with the puppet set
Line states detection messages sends the cycle, and timing sends pseudo-wire state-detection message to opposite end respectively.
Trouble point (b) or PE2 during in P equipment is such as Fig. 4, link between trouble point (a) or P equipment is such as Fig. 4
As when break down in trouble point (c) in Fig. 4, the pseudo-wire state-detection message of PE2 all can be caused to send
To PE1.And now, when the keep-alive timer expiry of PE1, PE1 judges turning of current static pseudo-wire
Hair-like state lost efficacy.Now, the PE1 CE1 that can link is linked into the access link of PE1, forbids that CE1 flows
Amount continues to forward.Equally, the pseudo-wire state-detection message of PE1 cannot be sent to PE2, PE2 and also can judge
The forwarding state of current static pseudo-wire lost efficacy, and linkage CE1 is linked into the access link of PE2, forbids
CE2 flow continues to forward, and repeats no more here.
Again with event in trouble point (d) in the link between PE2 and CE2 such as Fig. 4 or CE2 equipment such as Fig. 4
As a example by barrier point (e) breaks down, PE2 can perceive the link failure between CE2, now can link
The pseudo-i.e. PE2 of line states actively stops sending pseudo-wire state-detection message, and PE1 is at keep-alive timer expiry,
Just can determine that out that current pseudo-wire forwarding state lost efficacy according to static state pseudo-wire condition detection method of the present invention, in parallel
Dynamic CE1 is linked into the access link of PE1, forbids that CE1 flow continues to forward.Wherein, how PE2 feels
Know the known technology belonging to those skilled in the art that implements of the link failure between CE2, and
It is not intended to limit the scope of the invention, repeats no more here.
Fig. 5 is the network reference model signal of the second embodiment of static state pseudo-wire condition detection method of the present invention
Figure, the second embodiment is with the static pseudo-line states quick heavy-route of linkage (FRR, Fast ReRoute) protection
Scene as a example by, as shown in fig. 5, it is assumed that PE1 vertical main static pseudo-wire PW12 built with PE2, PE3 respectively
With standby static pseudo-wire PW13, as a example by the flow being sent to CE2 by CE1, CE1 is sent to PE1's
Flow is given tacit consent to via main PW i.e. PW12 to the PE2 between PE1 and PE2, then is transmitted to CE2 by PE2.
After enabling pseudo-wire status detection function on PE1 and PE2, PE1 and PE2 is all in accordance with the puppet set
Line states detection messages sends the cycle, and timing sends pseudo-wire state-detection message to opposite end respectively.
During in P1 equipment is such as Fig. 5, link between trouble point (a) or P equipment is such as Fig. 5 trouble point (b) or
PE2 (as when in Fig. 5, break down in trouble point (c), all can cause the pseudo-wire state-detection message of PE2 without
Method is sent to PE1.And now, when the keep-alive timer expiry of PE1, PE1 judges that current static is pseudo-
The forwarding state of line lost efficacy.Now, the customer flow that CE1 send is switched to standby pseudo-wire PW13 by PE1
On be transmitted, and be ultimately routed to CE2 equipment, switching timely ensure that not interrupting of customer flow.
As a example by link between PE2 and CE2 such as Fig. 5, break down in trouble point (d) again, PE2 can feel
Knowing the link failure between CE2, the pseudo-line states that now can link the most actively stops sending pseudo-wire
State detection messages；And PE1 equipment is at keep-alive timer expiry, according to static state pseudo-wire state-detection of the present invention
Method just can determine that the forwarding state of current static pseudo-wire lost efficacy, now, and the user that PE1 will send on CE1
Flow switch is transmitted in standby pseudo-wire PW13, and is ultimately routed to CE2 equipment.Ensure that use
Family flow does not interrupts.
Fig. 6 is the network reference model signal of the 3rd embodiment of static state pseudo-wire condition detection method of the present invention
Figure, the 3rd embodiment is as a example by the scene of static multi-segment pseudo-wires state transmission, and wherein, multi-segment pseudo-wires is right
The extension of single hop pseudo-wire, multi-segment pseudo-wires allows to there is a plurality of segmentation pseudo-wire between two PE, by exchange puppet
The PW section (PW Segment) of both sides is coupled together by line equipment (SPE, Switch-PE), and
SPE completes the label switching operation of pseudo-wire aspect.As shown in Figure 6, it is assumed that on PE1, SPE, PE2
Configuration forms static multi-segment pseudo-wires section (Segment).And assume the flow delivering to PE1 on CE1 via
Static (static) Segment PW1 is forwarded to SPE, then is turned by static Segment PW2 by SPE
It is dealt into PE2, and user's message is transmitted to CE2 the most at last.
After enabling pseudo-wire status detection function on PE1 and PE2, PE1 and PE2 is all in accordance with the puppet set
Line states detection messages sends the cycle, and timing sends pseudo-wire state-detection message to opposite end respectively.Here,
SPE is pseudo-wire state-detection message or user's message without distinguishing the message that receives, all unify according to
The forwarding rule of user's message forwards.It should be noted that according to the forwarding principle of MSPW, right
The scene of the detection of pseudo-wire end to end between PE1 and PE2 shown in Fig. 6, static pseudo-line states inspection
Survey to enable and be arranged on the PE at two ends, it is not necessary on SPE, enable the detection function in the present invention, also
That is, need not detection messages is identified and operates at SPE node.But, non-end is arrived
End detection, the MSPW scene mixed than the sound in the 4th embodiment as shown in Figure 7, static PW
SPE terminates, now, SPE needs enable the static pseudo-wire status detection function of the present invention, pseudo-
Line states detection messages needs to be identified and process on SPE.
Trouble point (a) or SPE (trouble point (b) or the link of equipment room in such as Fig. 6 in P equipment is such as Fig. 6
As, when break down in trouble point (d) in trouble point (c) or PE2 such as Fig. 6 in Fig. 6, the puppet of PE2 all can be caused
Line states detection messages cannot be sent to PE1.And now, when the keep-alive timer expiry of PE1, PE1
Judge that the forwarding state of current static pseudo-wire lost efficacy.Now, the PE1 CE1 that can link is linked into PE1's
Access link, forbids that CE1 flow continues to forward.
Again with fault in trouble point (f) in the link between PE2 and CE2 such as Fig. 6 or CE2 equipment such as Fig. 6
As a example by point (g) breaks down, PE2 can perceive the link failure between CE2, and now can link puppet
Line states i.e. actively stops sending pseudo-wire state-detection message, and PE1 is at keep-alive timer expiry, according to
Static state pseudo-wire condition detection method of the present invention just can determine that current pseudo-wire forwarding state lost efficacy, linkage CE1
It is linked into the access link of PE1, forbids that CE1 flow continues to forward.
Fig. 7 is the network reference model signal of the 4th embodiment of static state pseudo-wire condition detection method of the present invention
Figure, the 4th embodiment mixes as a example by the scene of multi-segment pseudo-wires state transmission by sound, as it is shown in fig. 7, false
If the upper built multi-segment pseudo-wires that erects of PE1, SPE, PE2, and assume it is static pseudo-between PE1 and SPE
Line segment, is dynamic (Dynamic) pseudo-line segment between SPE and PE2.
After enabling pseudo-wire status detection function on PE1 and SPE, PE1 and SPE is all in accordance with the puppet set
Line states detection messages sends the cycle, and that distinguishes timing sends pseudo-wire state-detection message to opposite end.
During in P1 equipment is such as Fig. 7, certain link between trouble point (a) or PE1 and SPE is such as Fig. 7 therefore
When barrier point (b) breaks down, the pseudo-wire state-detection message of SPE all can be caused cannot to be sent to PE1.And
Now, when the keep-alive timer expiry of PE1, PE1 judges that the forwarding state of current static pseudo-wire lost efficacy.
Now, the PE1 CE1 that can link is linked into the access link of PE1, forbids that CE1 flow continues to forward.
Again with in certain link such as Fig. 7 between trouble point (c) or SPE and PE2 in P2 equipment such as Fig. 7
As a example by trouble point (d) or PE2 such as Fig. 7, break down in trouble point (e), SPE is led to by pseudo-line states
Accuse protocol aware to the pseudo-wire link failure between SPE and PE2, now trigger and link and between PE1
The i.e. SPE of static link state actively stops to PE1 transmission pseudo-wire state-detection message, and now, PE1
Keep-alive timer expiry time, just can determine that currently according to static state pseudo-wire condition detection method PE1 of the present invention
Pseudo-wire forwarding state lost efficacy, and linkage CE1 is linked into the access link of PE1, forbids that CE1 flow continues
Forward.Wherein, dynamic implementing of pseudo-wire state advertisement agreement belongs to the known of those skilled in the art
Technology, implements the protection domain being not intended to limit the present invention, repeats no more here.
Again with trouble point in the link between PE2 and the CE2 such as trouble point (f) in Fig. 7 or CE2 such as Fig. 7
G () is broken down as a example by, PE2 can perceive the link failure between CE2, and PE2 is by dynamic pseudo-wire
State advertisement notice of settlement accesses sidelinks to SPE this locality and lost efficacy；SPE triggers between linkage and PE1
The i.e. SPE of static link state actively stops to PE1 transmission pseudo-wire state-detection message, and now, PE1
Keep-alive timer expiry time, just can determine that currently according to static state pseudo-wire condition detection method PE1 of the present invention
The forwarding state of static pseudo-wire lost efficacy, and linkage CE1 is linked into the access link of PE1, forbids CE1
Flow continues to forward.
Fig. 8 is the composition structural representation of static state pseudo-wire condition checkout gear of the present invention, as shown in Figure 8,
At least include time block, the first processing module；Wherein,
Time block, is wherein configured with keep-alive intervalometer, is used for starting keep-alive intervalometer.
First processing module, for sending pseudo-wire state-detection message to opposite end；According to receiving from right
During the pseudo-wire state-detection message held, the keep-alive timer state of self, determines the forwarding of current static pseudo-wire
State is the most effective.
Timer module is additionally operable to, and notifies the first processing module when keep-alive timer expiry；Receive and arrive
From the reset notification of the first processing module, restart keep-alive intervalometer；
First processing module specifically for, according to configuration pseudo-wire state-detection message send the cycle, the cycle
The generation pseudo-wire state-detection message of property, and it is sent to opposite end；According to the pseudo-wire from opposite end received
Identification field in the control word of state detection messages determines that this message is pseudo-wire state-detection message, and self
Keep-alive intervalometer have not timed out, determine that the forwarding state of current static pseudo-wire is effective；To time block
Output resets the reset notification of keep-alive intervalometer.
First processing module is additionally operable to: receive the logical of the expression keep-alive timer expiry from time block
Know, and do not receive pseudo-wire state-detection message, determine that the forwarding state of current static pseudo-wire was for losing efficacy；
Notice time block closes keep-alive intervalometer；Now,
First processing module is additionally operable to: receive the pseudo-wire state-detection message from opposite end, again judges to work as
The forwarding state of front pseudo-wire is effective, notifies time block, to trigger time block startup keep-alive intervalometer.
Further,
First processing module is additionally operable to: when carrying in the pseudo-wire state-detection message from opposite end received
When pseudo-wire state-detection message sends the duration of cycle and keep-alive intervalometer, if the pseudo-wire self arranged
State detection messages sends cycle and/or the duration of keep-alive intervalometer and differing of opposite end, holds consultation with really
Protect identical.
Apparatus of the present invention also include enabling module, are used for enabling pseudo-wire status detection function, and enable are referred to
Show and export to time block, to trigger time block startup keep-alive intervalometer.
Or,
First processing module is additionally operable to, and receives first pseudo-wire state-detection message from opposite end, logical
Know time block, to trigger time block startup keep-alive intervalometer.
Apparatus of the present invention also include: the second processing module, now,
First processing module is additionally operable to, when the forwarding state determining current static pseudo-wire is to lose efficacy, logical
Know the second processing module；
Second processing module is used for: linkage customer edge accesses the access link of self, forbids this use
Family edge device converting flow.
Further,
First processing module is additionally operable to, and perceives the access chain between the customer edge being connected with self
Road or customer edge itself break down, and actively stop sending pseudo-wire state-detection message.
Apparatus of the present invention can be independent community, it is also possible to is arranged on the edge device at static pseudo-wire two ends such as
On the equipment such as PE, SPE.
The above, the only preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention
Enclose.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done,
Should be included within the scope of the present invention.
Claims (23)
1. a static pseudo-wire condition detection method, it is characterised in that including:
First edge device and the second edge device are respectively started keep-alive intervalometer, and send pseudo-wire to opposite end
State-detection message；
First edge device or the second edge device are according to the guarantor of self when receiving pseudo-wire state-detection message
Active timer state, determines that the forwarding state of current static pseudo-wire is the most effective；
Wherein, the first edge device and the second edge device are the edge device being in static pseudo-wire two ends.
Static pseudo-wire condition detection method the most according to claim 1, it is characterised in that the method
The most also include: on described first edge device and described second edge device, enable pseudo-line states respectively
Detection function.
Static pseudo-wire condition detection method the most according to claim 2, it is characterised in that the method
The most also include: be configured to send the pseudo-wire state-detection report of pseudo-wire state-detection message to described opposite end
Literary composition transmission cycle, and the duration of described keep-alive intervalometer；
Wherein, time a length of pseudo-wire state-detection message of described keep-alive intervalometer sends the preset value N in cycle
Times, or the value of configuration, N is the natural number more than 1.
Static pseudo-wire condition detection method the most according to claim 3, it is characterised in that described in open
Dynamic protection intervalometer includes:
Described keep-alive intervalometer is opened during described enable pseudo-wire status detection function；Or,
Described keep-alive intervalometer is opened when receiving first pseudo-wire state-detection message from opposite end.
5. according to the static pseudo-wire condition detection method described in any one of Claims 1 to 4, it is characterised in that
Described pseudo-wire state-detection message needs the control word carried for distinguishing different type of message；
Wherein, control word at least includes the identification field for representing type of message.
Static pseudo-wire condition detection method the most according to claim 5, it is characterised in that described control
Word processed also includes the reserved Reserved field for subsequent expansion.
Static pseudo-wire condition detection method the most according to claim 5, it is characterised in that described control
Word processed also includes: for carrying described first edge device or the inspection of described second edge device self setting
The pseudo-wire state-detection message observing and predicting the literary composition transmission cycle sends period field, and is used for carrying described first
During the keep-alive intervalometer of the duration of the keep-alive intervalometer that edge device or described second edge device self are arranged
Long field.
Static pseudo-wire condition detection method the most according to claim 7, it is characterised in that the method
Also include:
If described first edge device or described second edge device determine the pseudo-wire state-detection received
The pseudo-wire state-detection message of the opposite end carried in message sends cycle and the duration of keep-alive intervalometer, with oneself
The pseudo-wire state-detection message that body is arranged sends the duration of cycle and/or keep-alive intervalometer and differs, and assists
Business is identical to guarantee.
Static pseudo-wire condition detection method the most according to claim 5, it is characterised in that described really
The forwarding state determining current static pseudo-wire the most effectively includes:
Described first edge device or described second edge device are according to the pseudo-wire state-detection message received
Identification field in control word determines that this message is pseudo-wire state-detection message,
And the keep-alive intervalometer of described first edge device or described second edge device self has not timed out, then
The forwarding state determining current static pseudo-wire is effective, resets the keep-alive intervalometer of self.
Static pseudo-wire condition detection method the most according to claim 9, it is characterised in that if
Described first edge device or described second edge device, after the keep-alive timer expiry of self, do not receive
Described pseudo-wire state-detection message, the method also includes:
Determine that the forwarding state of current static pseudo-wire, for losing efficacy, and closes the keep-alive intervalometer of self.
11. static pseudo-wire condition detection methods according to claim 10, it is characterised in that the party
Method also includes: described first edge device or described second edge device receive to be examined from opposite end puppet line states
Observe and predict literary composition, restart the keep-alive intervalometer of self.
12. static pseudo-wire condition detection methods according to claim 1, it is characterised in that described
First edge device or described second edge device determine that the forwarding state of current static pseudo-wire was for losing efficacy
Time, also include:
Described first edge device or described second edge device linkage customer edge access connecing of self
Incoming link, forbids this customer edge converting flow.
13. according to the static pseudo-wire condition detection method described in claim 1 or 12, it is characterised in that
Described first edge device or described second edge device determine that the forwarding state of current static pseudo-wire is for losing
Before effect, the method also includes:
Described first edge device or described second edge device perceive the customer edge being connected with self and set
Access link or customer edge itself between Bei break down, described first edge device or described
Second edge device stops sending described pseudo-wire state-detection message.
14. 1 kinds of static pseudo-wire condition checkout gears, it is characterised in that at least include time block, the
One processing module；Wherein,
Time block, is wherein configured with keep-alive intervalometer, is used for starting keep-alive intervalometer；
First processing module, for sending pseudo-wire state-detection message to opposite end；According to receiving from right
During the pseudo-wire state-detection message held, the keep-alive timer state of self, determines the forwarding of current static pseudo-wire
State is the most effective.
15. static pseudo-wire condition checkout gears according to claim 14, it is characterised in that described
Timer module is additionally operable to, and notifies described first processing module when described keep-alive timer expiry；Receive
To the reset notification from described first processing module, restart described keep-alive intervalometer；
Described first processing module specifically for, according to configuration pseudo-wire state-detection message send the cycle,
Periodically generate pseudo-wire state-detection message, and be sent to opposite end；According to the puppet from opposite end received
Identification field in the control word of line states detection messages determines that message is pseudo-wire state-detection message, and from
The keep-alive intervalometer of body has not timed out, and determines that the forwarding state of current static pseudo-wire is effective；To described fixed
Time module output reset described keep-alive intervalometer reset notification.
16. static pseudo-wire condition checkout gears according to claim 15, it is characterised in that
Described first processing module is additionally operable to: receive the expression keep-alive intervalometer from described time block
The notice of time-out, and do not receive pseudo-wire state-detection message, determine the forwarding state of current static pseudo-wire
For losing efficacy；Notify that described time block closes keep-alive intervalometer.
17. static pseudo-wire condition checkout gears according to claim 16, it is characterised in that
Described first processing module is additionally operable to: receives the pseudo-wire state-detection message from opposite end, again sentences
The forwarding state of settled front pseudo-wire is effective, notifies described time block, to trigger the startup of described time block
Keep-alive intervalometer.
18. static pseudo-wire condition checkout gears according to claim 15, it is characterised in that
Described first processing module is additionally operable to: when taking in the pseudo-wire state-detection message from opposite end received
When sending the duration of cycle and keep-alive intervalometer with pseudo-wire state-detection message, if the puppet self arranged
Line states detection messages sends cycle and/or the duration of keep-alive intervalometer and differing of opposite end, holds consultation
Identical to guarantee.
19. according to the static pseudo-wire condition checkout gear described in any one of claim 14～18, its feature
It is, also includes enabling module, be used for enabling pseudo-wire status detection function, and enable instruction output is given
Described time block, to trigger described time block startup keep-alive intervalometer.
20. according to the static pseudo-wire condition checkout gear described in any one of claim 14～18, its feature
Being, described first processing module is additionally operable to, and receives first pseudo-wire state-detection report from opposite end
Literary composition, notifies described time block, to trigger described time block startup keep-alive intervalometer.
21. static pseudo-wire condition checkout gears according to claim 14, it is characterised in that this dress
Put and also include: the second processing module；Now,
Described first processing module is additionally operable to, when the forwarding state determining current static pseudo-wire is to lose efficacy,
Notify the second processing module；
Second processing module is used for: linkage customer edge accesses the access link of self, forbids this use
Family edge device converting flow.
22. according to the static pseudo-wire condition checkout gear described in claim 14 or 21, it is characterised in that
Described first processing module is additionally operable to, and perceives connecing between the customer edge being connected with self
Incoming link or customer edge itself break down, and stop sending described pseudo-wire state-detection message.
23. static pseudo-wire condition checkout gears according to claim 14, it is characterised in that this dress
It is set to independent community, or is arranged in the edge device at static pseudo-wire or static pseudo-line segment two ends.
Priority Applications (2)
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| CN201510323636.4A CN106301867B (en) | 2015-06-12 | 2015-06-12 | A kind of static state pseudo-wire condition detection method and device |
| PCT/CN2016/071602 WO2016197613A1 (en) | 2015-06-12 | 2016-01-21 | Method of detecting static pseudo-wire state and device utilizing same |
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| CN201510323636.4A CN106301867B (en) | 2015-06-12 | 2015-06-12 | A kind of static state pseudo-wire condition detection method and device |
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| WO2016197613A1 (en) | 2016-12-15 |
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