CN108156050A - Seamless bidirectional forwarding detection (BFD) method and device - Google Patents
Seamless bidirectional forwarding detection (BFD) method and device Download PDFInfo
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- CN108156050A CN108156050A CN201711220523.7A CN201711220523A CN108156050A CN 108156050 A CN108156050 A CN 108156050A CN 201711220523 A CN201711220523 A CN 201711220523A CN 108156050 A CN108156050 A CN 108156050A
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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
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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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
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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Abstract
The invention discloses a kind of seamless bidirectional forwarding detection (BFD) method and devices.Wherein, this method includes：The node status information of the seamless two-way converting detection SBFD nodes of local terminal is read from local terminal chip list item by local terminal chip, and the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages, wherein, the local terminal chip list item that SBFD is carried out for local terminal SBFD nodes is configured in local terminal chip, the opposite end chip list item that SBFD is carried out for opposite end SBFD nodes is configured in the chip of opposite end；The SBFD messages of encapsulation are sent to by opposite end SBFD nodes by local terminal chip, wherein, SBFD messages obtain the node status information of local terminal SBFD nodes for opposite end SBFD nodes by opposite end chip list item；Opposite end SBFD nodes are received by local terminal chip, message is replied by the SBFD that opposite end chip is replied, wherein, SBFD replys the node status information that opposite end SBFD nodes are packaged in message.When solving realization SBFD in the related art, there is technical issues that be unsatisfactory in performance stabilization and in speed.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of seamless bidirectional forwarding detection (BFD) method and device.
Background technology
Two-way converting detection (Bidirectional Forwarding Detection, referred to as BFD) is used in network
In the mechanism of quick error detection, be currently, there are Internet Protocol (Internet Protocol-BFD, referred to as IP-BFD),
Multiprotocol label switching (Multi-Protocol Label Switching-BFD, referred to as MPLS-BFD), multiprotocol label
A variety of BFD skills such as switched transport network two-way converting detection (MPLS Transport Profile BFD, referred to as TP-BFD)
Art.BFD technologies in the related art are required to carry out 3 times traditional processes shaken hands when establishing session, and traditional hold
Hand process not only operates miscellaneous but also less efficient.Based on the above problem of BFD in the relevant technologies, later, a kind of nothing is provided
Two-way converting detection (Seamless Bidirectional Forwarding Detection, referred to as SBFD) is stitched, SBFD makees
For a kind of novel B FD technologies, the conversation initialization and state machine of BFD are simplified, traditional BFD has been simplified and has established session needs 3 times
The process shaken hands causes BFD quickly and efficiently to a certain extent.But realize that SBFD technologies generally pass through in the related art
The mode that software or software and hardware are realized, and when carrying out SBFD by above-mentioned realization method still in stability and
There is a situation where to be unsatisfactory for requirement in speed.
For it is above-mentioned the problem of, currently no effective solution has been proposed.
Invention content
An embodiment of the present invention provides a kind of seamless bidirectional forwarding detection (BFD) method and device, at least to solve in the relevant technologies
During middle realization SBFD, there is technical issues that be unsatisfactory in performance stabilization and in speed.
One side according to embodiments of the present invention provides a kind of seamless bidirectional forwarding detection (BFD) method, including：Pass through this
End chip reads the node status information of the seamless two-way converting detection SBFD nodes of local terminal from local terminal chip list item, and will read
The node status informations of the local terminal SBFD nodes be packaged into SBFD messages, wherein, be configured in the local terminal chip useful
The local terminal chip list item of SBFD is carried out in the local terminal SBFD nodes, is configured in the chip of opposite end and is saved for opposite end SBFD
Point carries out the opposite end chip list item of the SBFD；The SBFD messages of encapsulation are sent to by institute by the local terminal chip
Opposite end SBFD nodes are stated, wherein, the SBFD messages are obtained for the opposite end SBFD nodes by the opposite end chip list item
The node status information of the local terminal SBFD nodes；By the local terminal chip receive the opposite end SBFD nodes pass through it is described
The SBFD that opposite end chip is replied replys message, wherein, the SBFD replys the section that the opposite end SBFD nodes are packaged in message
Three-point state information.
Optionally, receiving what the opposite end SBFD nodes were replied by the opposite end chip by the local terminal chip
After the SBFD replys message, further include：Message is replied to the SBFD of reception to parse, and is obtained described for identifying
The field of the node status information of opposite end SBFD nodes；The field obtained and the local terminal chip list item of configuration will be parsed
Field matched；In the case of successful match, the node status information for identifying the opposite end SBFD nodes is obtained
Field value.
Optionally, the node status information of the local terminal SBFD nodes of reading is packaged into the SBFD messages to include：
The SBFD messages that will be encapsulated are abstracted into two parts, wherein, a part is message format part corresponding with type of service, another
Part is the identical corresponding message content part of payload；According to the two parts being abstracted into, by the local terminal of reading
The node status information of SBFD nodes is packaged into the SBFD messages.
Optionally, the local terminal chip list item includes at least one of：For identify node be local terminal SBFD nodes also
It is the DsMa.sBfdType list items of opposite end SBFD nodes；For representing the sending cycle information of local terminal SBFD nodes, time-out detection
Time and the DsBfdMep list items of agreement operation result；SBFD for preserving local terminal SBFD nodes safeguards the value key of endpoint
DsEgressXcOamBfdHashKey list items；For preserving the DsMa list items of the edit action of local terminal SBFD nodes；For table
Show the localStat list items of the state machine information of local terminal SBFD nodes；Alternatively, the opposite end chip list item include it is following at least it
One：For identifying the DsMa.sBfdType list items that node is local terminal SBFD nodes or opposite end SBFD nodes；For representing opposite end
The DsBfdMep list items of the sending cycle information of SBFD nodes, overtime detection time and agreement operation result；For preservation pair
The SBFD of end SBFD nodes safeguards the DsEgressXcOamBfdHashKey list items of the value key of endpoint；For preserving opposite end SBFD
The DsMa list items of the edit action of node；For representing the localStat list items of the state machine information of opposite end SBFD nodes.
According to an aspect of the present invention, another seamless bidirectional forwarding detection (BFD) method is additionally provided, including：Pass through opposite end
Chip receives the seamless two-way converting detection SBFD messages of local terminal chip transmission, wherein, it is packaged in the SBFD messages logical
The node status information of local terminal SBFD nodes that the local terminal chip is read from local terminal chip list item is crossed, wherein, at described
The local terminal chip list item that SBFD is carried out for the local terminal SBFD nodes is configured in the chip of end, in the opposite end chip
It is configured with the opposite end chip list item that the SBFD is carried out for opposite end SBFD nodes；By the opposite end chip according to the opposite end
The SBFD messages that the docking of chip list item receives are identified, and obtain the node status information of the local terminal SBFD nodes；It is logical
It crosses the opposite end chip and replys SBFD reply messages to the local terminal chip, wherein, it is packaged in the SBFD replies message logical
Cross the node status information of the opposite end SBFD nodes that the opposite end chip is read from the opposite end chip list item.
Optionally, it is carried out by the opposite end chip according to the SBFD messages that opposite end chip list item docking receives
Identification, the node status information for obtaining the local terminal SBFD nodes include：The SBFD messages of reception are parsed, are obtained
For identifying the field of the node status information of the local terminal SBFD nodes；Described in the field obtained being parsed and be configured
The field of opposite end chip list item is matched；In the case of successful match, obtain to identify the local terminal SBFD nodes
The value of the field of node status information.
Optionally, according to User Data Protocol port UDP port 7784 or ACH Type 0x0008, by described
Opposite end chip is identified according to the SBFD messages that opposite end chip list item docking receives, and obtains the local terminal SBFD sections
The node status information of point.
Optionally, the SBFD replies message is replied to the local terminal chip by the opposite end chip to include：It will return
Multiple SBFD replys message and is abstracted into two parts, wherein, it is a part of for message format part corresponding with type of service, another portion
It is divided into the corresponding message content part of identical payload；According to the two parts being abstracted into, by the opposite end SBFD nodes
Node status information is packaged into the SBFD and replys message；It is replied by the opposite end chip to the local terminal chip according to abstract
Into the SBFD that is packaged into of two parts reply message.
According to another aspect of the present invention, a kind of seamless two-way converting detection device is provided, including：Package module is used
In the node status information for reading local terminal seamless two-way converting detection SBFD nodes from local terminal chip list item by local terminal chip,
And the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages, wherein, in the local terminal chip
Be configured with for the local terminal SBFD nodes carry out SBFD the local terminal chip list item, be configured in the chip of opposite end for pair
SBFD nodes is held to carry out the opposite end chip list item of the SBFD；Sending module will encapsulate for passing through the local terminal chip
The SBFD messages be sent to the opposite end SBFD nodes, wherein, the SBFD messages lead to for the opposite end SBFD nodes
Cross the node status information that the opposite end chip list item obtains the local terminal SBFD nodes；First receiving module, for passing through
It states local terminal chip and receives the SBFD reply messages that the opposite end SBFD nodes are replied by the opposite end chip, wherein, it is described
SBFD replys the node status information that the opposite end SBFD nodes are packaged in message.
According to another aspect of the present invention, another seamless two-way converting detection device is additionally provided, including：Second receives
Module, the seamless two-way converting that the transmission of local terminal chip is received for passing through opposite end chip detect SBFD messages, wherein, it is described
The node state of local terminal SBFD nodes read from local terminal chip list item by the local terminal chip is packaged in SBFD messages
Information, wherein, the local terminal chip list that SBFD is carried out for the local terminal SBFD nodes is configured in the local terminal chip
, the opposite end chip list item that the SBFD is carried out for opposite end SBFD nodes is configured in the opposite end chip；Identification module,
For being identified by the opposite end chip according to the SBFD messages that opposite end chip list item docking receives, institute is obtained
State the node status information of local terminal SBFD nodes；Module is replied, is replied for passing through the opposite end chip to the local terminal chip
SBFD replys message, wherein, the SBFD, which is replied, to be packaged with through the opposite end chip in message from the opposite end chip list item
The node status information of the opposite end SBFD nodes of middle reading.
In embodiments of the present invention, using chip read information, encapsulated message and send message mode realize SBFD
The mode of detection has achieved the purpose that, only by hardware realization SBFD, the technology of ms grades of SBFD to be realized so as to fast and stable
Effect, so solve in the related art realize SBFD when, performance stabilization on and speed on exist be unsatisfactory for requirement
Technical problem.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and forms the part of the application, this hair
Bright illustrative embodiments and their description do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of seamless bidirectional forwarding detection (BFD) method one according to embodiments of the present invention；
Fig. 2 is the flow chart of seamless bidirectional forwarding detection (BFD) method two according to embodiments of the present invention；
Fig. 3 is the structure diagram of seamless two-way converting detection device one according to embodiments of the present invention；
Fig. 4 is the preferred structure block diagram of seamless two-way converting detection device one according to embodiments of the present invention；
Fig. 5 is the preferred structure frame of package module 32 in seamless two-way converting detection device one according to embodiments of the present invention
Figure；
Fig. 6 is the structure diagram of seamless two-way converting detection device two according to embodiments of the present invention；
Fig. 7 is the preferred structure frame of identification module 64 in seamless two-way converting detection device two according to embodiments of the present invention
Figure；
Fig. 8 is the preferred structure frame that module 66 is replied in seamless two-way converting detection device two according to embodiments of the present invention
Figure；
Fig. 9 is SBFD payload form schematic diagrams according to embodiments of the present invention；
Figure 10 is the schematic diagram of SBFDInitiator state machines according to embodiments of the present invention；
Figure 11 is that chip according to the preferred embodiment of the present invention handles the SBFD messages that different agreement encapsulates
Schematic diagram；
Figure 12 is the efficient schematic diagram to different SBFD Message processings according to embodiments of the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's all other embodiments obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, and specific sequence or precedence are described without being used for.It should be appreciated that it uses in this way
Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not listing clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to embodiments of the present invention, a kind of embodiment of the method for seamless bidirectional forwarding detection (BFD) method is provided, needs to illustrate
, step shown in the flowchart of the accompanying drawings can hold in the computer system of such as a group of computer-executable instructions
Row, although also, show logical order in flow charts, it in some cases, can be to be different from sequence herein
Perform shown or described step.
Fig. 1 is the flow chart of seamless bidirectional forwarding detection (BFD) method one according to embodiments of the present invention, as shown in Figure 1, the party
Method includes the following steps：
Step S102 reads the seamless two-way converting detection SBFD nodes of local terminal by local terminal chip from local terminal chip list item
Node status information, and the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages, wherein, in local terminal
The local terminal chip list item that SBFD is carried out for local terminal SBFD nodes is configured in chip, is configured in the chip of opposite end for opposite end
SBFD nodes carry out the opposite end chip list item of SBFD；
The SBFD messages of encapsulation are sent to opposite end SBFD nodes by step S104 by local terminal chip, wherein, SBFD messages
The node status information of local terminal SBFD nodes is obtained by opposite end chip list item for opposite end SBFD nodes；
Step S106 receives opposite end SBFD nodes by local terminal chip and replys report by the SBFD that opposite end chip is replied
Text, wherein, SBFD replys the node status information that opposite end SBFD nodes are packaged in message.
By above-mentioned steps, information, encapsulated message and transmission are read using chip by the local terminal chip for carrying out SBFD
The mode of message realizes the mode of SBFD detections, has achieved the purpose that only by hardware realization SBFD, relative in the relevant technologies
It realizes that BFD is required to be related to for software approach, SBFD only can be thus achieved by hardware chip, realized so as to fast and stable
The technique effect of ms grades of SBFD, and then solve when realizing SBFD in the related art, in performance stabilization and in speed
There is technical issues that be unsatisfactory for.
After the SBFD reply messages that opposite end SBFD nodes are replied by opposite end chip are received by local terminal chip, it is
The complete node status information for getting opposite end SBFD nodes, can obtain in the following manner：Report is replied to the SBFD of reception
Text is parsed, obtain for identify opposite end SBFD nodes node status information field；The field obtained will be parsed with matching
The field of local terminal chip list item put is matched；In the case of successful match, obtain to identify opposite end SBFD nodes
The value of the field of node status information.By above-mentioned matched mode, that is, realize realizes local terminal SBFD sections by local terminal chip
Point replys the SBFD that opposite end SBFD nodes are sent the identification of message, is realised that the node status information of opposite end SBFD nodes, complete
Site preparation realizes SBFD.
SBFD for the message for efficiently adapting to various different-formats, in the node state of local terminal SBFD nodes that will be read
When Information encapsulation is into SBFD messages, following preferred embodiment may be used：The SBFD messages that will be encapsulated are abstracted into two parts,
Wherein, a part is message format part corresponding with type of service, and another part is the identical corresponding message of payload
Content part；According to the two parts being abstracted into, the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages.
By above-mentioned processing, part and the part unrelated with message format that will be related with message format separate, to different-format
Message when being handled, it is only necessary to a pair part related with message format is handled, and the part unrelated with message format is then
It does not need to change every time or even without modification, greatly increases the SBFD efficiency of local terminal SBFD nodes.
It should be noted that above-mentioned local terminal chip list item can include at least one of：It is local terminal for identifying node
The DsMa.sBfdType list items of SBFD nodes or opposite end SBFD nodes；For representing that the sending cycle of local terminal SBFD nodes is believed
The DsBfdMep list items of breath, overtime detection time and agreement operation result；It is safeguarded for preserving the SBFD of local terminal SBFD nodes
The DsEgressXcOamBfdHashKey list items of the value key of endpoint；For preserving the DsMa of the edit action of local terminal SBFD nodes
List item；For representing the localStat list items of the state machine information of local terminal SBFD nodes；Alternatively, opposite end chip list item can wrap
Include at least one of：For identifying the DsMa.sBfdType list items that node is local terminal SBFD nodes or opposite end SBFD nodes；
For representing the DsBfdMep tables of the sending cycle information of opposite end SBFD nodes, overtime detection time and agreement operation result
；SBFD for preserving opposite end SBFD nodes safeguards the DsEgressXcOamBfdHashKey list items of the value key of endpoint；With
In the DsMa list items for the edit action for preserving opposite end SBFD nodes；For representing the state machine information of opposite end SBFD nodes
LocalStat list items.
In embodiments of the present invention, another seamless bidirectional forwarding detection (BFD) method is additionally provided, Fig. 2 is according to of the invention real
The flow chart of the seamless bidirectional forwarding detection (BFD) method two of example is applied, as shown in Fig. 2, the flow includes the following steps：
Step S202, the seamless two-way converting that the transmission of local terminal chip is received by opposite end chip detect SBFD messages,
In, the node state that the local terminal SBFD nodes read from local terminal chip list item by local terminal chip are packaged in SBFD messages is believed
Breath, wherein, the local terminal chip list item that SBFD is carried out for local terminal SBFD nodes is configured in local terminal chip, in the chip of opposite end
It is configured with the opposite end chip list item that SBFD is carried out for opposite end SBFD nodes；
Step S204 is identified according to the SBFD messages that chip list item docking in opposite end receives by opposite end chip, obtained
The node status information of local terminal SBFD nodes；
Step S206 replys SBFD to local terminal chip by opposite end chip and replys message, wherein, SBFD is replied to be sealed in message
Equipped with the node status information of opposite end SBFD nodes read from the chip list item of opposite end by opposite end chip.
By above-mentioned steps, information, encapsulated message and transmission are read using chip by the opposite end chip for carrying out SBFD
The mode of message realizes the mode of SBFD detections, has achieved the purpose that only by hardware realization SBFD, relative in the relevant technologies
It realizes that BFD is required to be related to for software approach, SBFD only can be thus achieved by hardware chip, realized so as to fast and stable
The technique effect of ms grades of SBFD, and then solve when realizing SBFD in the related art, in performance stabilization and in speed
There is technical issues that be unsatisfactory for.
Optionally, it is identified by opposite end chip according to the SBFD messages that chip list item docking in opposite end receives, obtains this
The node status information of end SBFD nodes includes：The SBFD messages of reception are parsed, obtain to identify local terminal SBFD sections
The field of the node status information of point；The field obtained will be parsed to match with the field for the opposite end chip list item being configured；
In the case of successful match, obtain for identify local terminal SBFD nodes node status information field value.Pass through above-mentioned
The mode matched realizes the knowledge that the SBFD messages that opposite end SBFD nodes send local terminal SBFD nodes are realized by opposite end chip
Not, it is realised that the node status information of local terminal SBFD nodes, completely realizes SBFD.
It is being identified by opposite end chip according to the SBFD messages that chip list item docking in opposite end receives, is obtaining local terminal SBFD
During the node status information of node, various ways may be used, for example, can be according to User Data Protocol port UDP port
7784 or related channel program head (Associated Channel Header, referred to as ACH) type 0x0008ACH Type
0x0008 is identified according to the SBFD messages that chip list item docking in opposite end receives by opposite end chip, obtains local terminal SBFD sections
The node status information of point.Other manner can certainly be used, the SBFD messages received are known as long as can realize
Not, herein without citing.
SBFD for the message for efficiently adapting to various different-formats, optionally, by opposite end chip to local terminal chip
When replying SBFD reply messages, following preferred embodiment may be used：The SBFD that will be replied replys message and is abstracted into two
Point, wherein, a part is message format part corresponding with type of service, and another part is the identical corresponding report of payload
Literary content part；According to the two parts being abstracted into, the node status information of opposite end SBFD nodes is packaged into SBFD and replys message；
The SBFD being packaged into according to the two parts being abstracted into is replied to local terminal chip by opposite end chip and replys message.Pass through above-mentioned place
Reason, part (message format part i.e. corresponding with type of service) that will be related with message format and unrelated with message format
Partly (the corresponding message content part of i.e. identical payload) separates, when the message to different-format is handled, only
A pair part related with message format is needed to handle, the part unrelated with message format does not need to then change every time, very
To without modification, the SBFD efficiency of opposite end SBFD nodes is greatly increased.
In embodiments of the present invention, a kind of seamless two-way converting detection device is provided, Fig. 3 is according to embodiments of the present invention
Seamless two-way converting detection device one structure diagram, as shown in figure 3, the device be applied to local terminal chip, including：Encapsulation Moulds
Block 32,34 and first receiving module 36 of sending module, below illustrates the device.
Package module 32 reads the seamless two-way converting detection of local terminal for passing through local terminal chip from local terminal chip list item
The node status information of SBFD nodes, and the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages,
In, the local terminal chip list item that SBFD is carried out for local terminal SBFD nodes is configured in local terminal chip, is configured in the chip of opposite end
It is useful for the opposite end chip list item that opposite end SBFD nodes carry out SBFD；Sending module 34 is connected to above-mentioned package module 32, is used for
The SBFD messages of encapsulation are sent to by opposite end SBFD nodes by local terminal chip, wherein, SBFD messages are used for opposite end SBFD nodes
The node status information of local terminal SBFD nodes is obtained by opposite end chip list item；First receiving module 36, is connected to above-mentioned transmission
Module 34, for passing through the SBFD reply messages that local terminal chip receives opposite end SBFD nodes and replied by opposite end chip, wherein,
SBFD replys the node status information that opposite end SBFD nodes are packaged in message.
Fig. 4 is the preferred structure block diagram of seamless two-way converting detection device one according to embodiments of the present invention, such as Fig. 4 institutes
Show, which further includes in addition to including all structures shown in Fig. 3：Parsing module 42, matching module 44 and acquisition module 46,
The preferred structure is illustrated below.
Parsing module 42 is connected to above-mentioned first receiving module 36, and replying message to the SBFD of reception parses, and obtains
For identifying the field of the node status information of opposite end SBFD nodes；Matching module 44 is connected to above-mentioned parsing module 42, is used for
The field obtained will be parsed to match with the field for the local terminal chip list item being configured；Acquisition module 46 is connected to above-mentioned matching
Module 44, in the case of successful match, obtain for identify opposite end SBFD nodes node status information field
Value.
Fig. 5 is the preferred structure frame of package module 32 in seamless two-way converting detection device one according to embodiments of the present invention
Figure, as shown in figure 5, the package module 32 includes：First division unit 52 and the first encapsulation unit 54, below to the package module
32 illustrate.
First division unit 52, the SBFD messages for that will encapsulate are abstracted into two parts, wherein, a part is and business
The corresponding message format part of type, another part are the identical corresponding message content part of payload；First encapsulation is single
Member 54 is connected to the first division unit 52, and according to the two parts being abstracted into, the node state of the local terminal SBFD nodes of reading is believed
Breath is packaged into SBFD messages.
Optionally, local terminal chip list item includes at least one of：It is local terminal SBFD nodes or right for identifying node
Hold the DsMa.sBfdType list items of SBFD nodes；For representing the sending cycle information of local terminal SBFD nodes, when time-out detects
Between and agreement operation result DsBfdMep list items；SBFD for preserving local terminal SBFD nodes safeguards the value key's of endpoint
DsEgressXcOamBfdHashKey list items；For preserving the DsMa list items of the edit action of local terminal SBFD nodes；For representing
The localStat list items of the state machine information of local terminal SBFD nodes；Alternatively, opposite end chip list item includes at least one of：With
In mark node be local terminal SBFD nodes or opposite end SBFD nodes DsMa.sBfdType list items；For representing opposite end SBFD
The DsBfdMep list items of the sending cycle information of node, overtime detection time and agreement operation result；For preserving opposite end
The SBFD of SBFD nodes safeguards the DsEgressXcOamBfdHashKey list items of the value key of endpoint；For preserving opposite end SBFD sections
The DsMa list items of the edit action of point；For representing the localStat list items of the state machine information of opposite end SBFD nodes.
In embodiments of the present invention, another seam two-way converting detection device is additionally provided, Fig. 6 is implemented according to the present invention
The structure diagram of the seamless two-way converting detection device two of example, as shown in fig. 6, the device is applied to opposite end chip, including：Second
Receiving module 62, identification module 64 and reply module 66, below illustrate the device.
Second receiving module 62, for passing through the seamless two-way converting detection that opposite end chip receives the transmission of local terminal chip
SBFD messages, wherein, the local terminal SBFD nodes read from local terminal chip list item by local terminal chip are packaged in SBFD messages
Node status information, wherein, be configured in local terminal chip for local terminal SBFD nodes carry out SBFD local terminal chip list item,
The opposite end chip list item that SBFD is carried out for opposite end SBFD nodes is configured in the chip of opposite end；Identification module 64, is connected to
The second receiving module 62 is stated, is identified for passing through opposite end chip according to the SBFD messages that chip list item docking in opposite end receives,
Obtain the node status information of local terminal SBFD nodes；Module 66 is replied, above-mentioned identification module 64 is connected to, for passing through opposite end core
Piece replys SBFD to local terminal chip and replys message, wherein, SBFD, which is replied, to be packaged with through opposite end chip in message from opposite end chip
The node status information of opposite end SBFD nodes read in list item.
Fig. 7 is the preferred structure frame of identification module 64 in seamless two-way converting detection device two according to embodiments of the present invention
Figure, as shown in fig. 7, the identification module 64 includes：Resolution unit 72, matching unit 74 and acquiring unit 76, below to the identification
Module 64 illustrates.
Resolution unit 72 parses for the SBFD messages to reception, obtains the section for identifying local terminal SBFD nodes
The field of three-point state information；Matching unit 74 is connected to above-mentioned resolution unit 72, for that will parse the field obtained and configuration
The field of opposite end chip list item is matched；Acquiring unit 76 is connected to above-mentioned matching unit 74, in the feelings of successful match
Under condition, obtain for identify local terminal SBFD nodes node status information field value.
Optionally, the identification module 64 is additionally operable to according to User Data Protocol port UDP port 7784 or ACH
Type 0x0008 are identified according to the SBFD messages that chip list item docking in opposite end receives by opposite end chip, obtain local terminal
The node status information of SBFD nodes.
Fig. 8 is the preferred structure frame that module 66 is replied in seamless two-way converting detection device two according to embodiments of the present invention
Figure, as shown in figure 8, the reply module 66 includes：Second division unit 82, the second encapsulation unit 84 and reply unit 86, below
The reply module 66 is illustrated.
Second division unit 82 replys message for the SBFD that will reply and is abstracted into two parts, wherein, a part be with
The corresponding message format part of type of service, another part are the identical corresponding message content part of payload；Second envelope
Unit 84 is filled, is connected to above-mentioned second division unit 82, according to the two parts being abstracted into, by the node state of opposite end SBFD nodes
Information encapsulation replys message into SBFD；Reply unit 86, be connected to above-mentioned second encapsulation unit 84, for pass through opposite end chip to
Local terminal chip replys the SBFD being packaged into according to the two parts being abstracted into and replys message.
The preferred embodiment for the present invention is illustrated below.
Establishing complete SBFD tests needs 2 table apparatus, and one is configured to SBFD transmitting terminals, and one is configured to SBFD reflections
End.Wherein, SBFD transmitting terminals actively send SBFD messages (purpose is to initiate SBFD detections), and passively reflection receives SBFD reflection ends
SBFD messages.By SBFD transmitting terminals send SBFD messages, SBFD reflection ends reply SBFD messages, detect two nodes between
Link it is whether normal.If it find that link failure, which can quickly generate interruption, notify CPU processing.
It should be noted that SBFD message formats, regardless of encapsulation, it is most important that SBFD payload, it can
Complete SBFD detections, the MAC addresses (Media Access Control, referred to as MAC) of front, IP heads, multi-protocols mark
Label exchange (Multi-Protocol Label Switching, referred to as MPLS) label etc. and are only to discriminate between different business,
That is different business, SBFD message formats are different.
Fig. 9 is SBFD payload form schematic diagrams according to embodiments of the present invention, as shown in figure 9, being pre- before D bit
It stays, distinguishes transmitting terminal or reflection end using D bit in SBFD payload forms, D=1 represents transmitting terminal, D=0 tables
Show reflection end).The payload forms of SBFD transmitting terminals and SBFD reflection ends are different, and logic is different, are realized different
Function.Illustrate separately below.
SBFD transmitting terminals：Figure 10 is the schematic diagram of SBFDInitiator state machines according to embodiments of the present invention, such as Figure 10
Shown, SBFD sender nodes (SBFDInitiator namely above-mentioned local terminal SBFD nodes) have up, down, admindown
Three state.SBFDInitiator's is characterized mainly in that：(1) BFD control messages are actively sent, safeguard update state machine, hair
It rises and negotiates；(2) the message D bit=1 sent；(3) applied to IP BFD scenes：TTL=255；(4) applied to MPLS BFD
Scape：The TTL=255 of outermost layer label；The IPDA of IP Header is 127/8 or 0:0:0:0:0:ffff:7f00:0/104.
SBFD reflection ends (SBFDReflector namely above-mentioned opposite end SBFD nodes), SBFDReflector can recognize
For no state machine, only UP and AdminDown two states, the up and down of port correspond to respectively SBFD state machines UP and
AdminDown；If port UP, SBFD UP messages are directly replied, if port down, directly replys AdminDown.
SBFDReflector's is characterized mainly in that：(1) BFD control messages are not sent actively, are only receiving SBFDInitiator's
A message (receiving message, reply at once) is replied after control message；(2) control of matched SBFDInitiator is received
, can be to the information of some in message into edlin after message, IPsa and IPda is exchanged, UDP port are exchanged；(3) report replied
Literary D bit=0；(4) update state machine is not needed to, stat is AdminDown or UP, is determined by the Up or down of port.
Figure 11 is that chip according to the preferred embodiment of the present invention handles the SBFD messages that different agreement encapsulates
Schematic diagram, as shown in figure 11, the SBFD message offer processing that chip encapsulates different agreement, including message receive and message
Send both direction.
SBFDInitiator can actively send and receive SBFD messages, and SBFDReflector (SBFD reflection ends) is no
It actively sends, only passively receives SBFD messages, chip distributes hard table resource for each SBFD node：
DsEgressXcOamBfdHashKey, DsBfdMep, DsBfdRmep, DsMa below illustrate above-mentioned resource.
Chip list item DsMa.sBfdType is provided to distinguish SBFDInitiator and SBFDReflector, so as to carry out
Different processing logics；Chip list item DsBfdMep, DsBfdRmep is provided and represents local terminal SBFD nodes and opposite end SBFD nodes
State machine information, sending cycle, overtime detection time and other agreements operation handling result；Chip list item is provided
DsEgressXcOamBfdHashKey is unique to indicate SBFD nodes for preserving the key that SBFD safeguards endpoint；Chip list is provided
Item DsMa preserves the information such as the edit action of SBFD；Chip list item localStat is provided, represents the state machine letter of SBFD nodes
Breath, only Down, AdminDown, UP, do not have Init states.
Wherein, when chip receives SBFD messages, SBFD messages can be identified in several ways, example
Such as, SBFD messages, and reservation register are identified by UDP port 7784 or ACH Type 0x0008 in the chips, it can be with
Support the identification of the SBFD messages of other follow-up protocol encapsulation forms.
SBFDInitiator and SBFDReflector carries out SBFD and includes：
When SBFDInitiator actively sends SBFD messages, from DsEgressXcOamBfdHashKey, DsBfdMep,
The information of needs is taken out in DsBfdRmep, DsMa, such as：State machine, diagnostic message, sending cycle, detection time, negotiation information
And two layers, the information such as three layers of message；SBFDReflector receives the report that desired SBFDInitiator is sended over
According to corresponding chip logic, it is hard to update DsEgressXcOamBfdHashKey, DsBfdMep, DsBfdRmep, DsMa for text
The value of part list item, and reply SBFD messages and give SBFDInitiator nodes, reply state machine, diagnostic message, the hair in message
The information such as period, detection time, negotiation are sent from DsEgressXcOamBfdHashKey, DsBfdMep, DsBfdRmep, DsMa table
It is taken in.
It should be noted that when above-mentioned use chip realization handles SBFD messages, can realize to various protocols
SBFD messages handled, for example, can realize at the SBFD messages to IPv4, IPv6, MPLS various protocols encapsulation format
Reason.
When carrying out the encapsulation of SBFD messages, it is contemplated that forward and backward compatibility provides one kind to efficiently to difference
The schematic diagram of SBFD Message processings, Figure 12 are the efficient schematic diagrames to different SBFD Message processings according to embodiments of the present invention,
As shown in figure 12, when handling SBFD messages, the processing of different SBFD messages is abstracted as two parts：Message format is unrelated
Part and message format relevant portion, it is such the advantages of be exactly it is follow-up increase extended formatting SBFD messages when, it is only necessary to change
The logic of message format relevant portion, the logic of message format irrelevant portions do not need to change.Message format irrelevant portions refer to not
SBFD messages with protocol format are required for the logic handled, such as state machine, transmission and detection cycle etc..Message format
Relevant portion refers mainly to the SBFD of different encapsulation format.The SBFD message formats of different business scene are different, but message is last
The BFD payload in face are as touching, and logic is all.
SBFD technologies are developed by BFD technologies, the standard formulations such as RFC7880 some standard implementations of SBFD,
In the embodiment of the present invention, on the basis of RFC, with reference to the characteristics of chip, being realized by chip a set of can complete SBFD work(
The device of energy.By the chip of above-mentioned processing SBFD messages, can not only efficiently handle various protocols encapsulation format (Ipv4,
Ipv6, MPLS) SBFD messages, backward compatibility is effectively realized, in addition, after also being supported by way of reserved chip list item
Continuous SBFD agreement new contents, efficiently and rapidly realize the processing to SBFD messages, in addition, rapidity and stabilization that chip is realized
Property be that software realization can not be compared, the mode that chip is realized can realize the processing of ms grades of SBFD sessions.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, all emphasize particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of unit, can be one kind
Division of logic function, can there is an other dividing mode in actual implementation, such as multiple units or component can combine or can
To be integrated into another system or some features can be ignored or does not perform.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of unit or module,
Can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
Component may or may not be physical unit, you can be located at a place or can also be distributed to multiple units
On.Some or all of unit therein can be selected according to the actual needs to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If integrated unit realized in the form of SFU software functional unit and be independent product sale or in use, can
To be stored in a computer read/write memory medium.Based on such understanding, technical scheme of the present invention substantially or
Saying all or part of the part contribute to the prior art or the technical solution can be embodied in the form of software product
Out, which is stored in a storage medium, is used including some instructions so that a computer equipment
(can be personal computer, server or network equipment etc.) performs all or part of each embodiment the method for the present invention
Step.And aforementioned storage medium includes：USB flash disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of seamless bidirectional forwarding detection (BFD) method, which is characterized in that including：
The node state letter of the seamless two-way converting detection SBFD nodes of local terminal is read from local terminal chip list item by local terminal chip
Breath, and the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages, wherein, in the local terminal chip
In be configured with for the local terminal SBFD nodes carry out SBFD the local terminal chip list item, be configured with and be used in the chip of opposite end
Opposite end SBFD nodes carry out the opposite end chip list item of the SBFD；
The SBFD messages of encapsulation are sent to by the opposite end SBFD nodes by the local terminal chip, wherein, the SBFD
The node state that message obtains the local terminal SBFD nodes for the opposite end SBFD nodes by the opposite end chip list item is believed
Breath；
The opposite end SBFD nodes are received by the local terminal chip, message are replied by the SBFD that the opposite end chip is replied,
Wherein, the SBFD replys the node status information that the opposite end SBFD nodes are packaged in message.
2. according to the method described in claim 1, it is characterized in that, receiving the opposite end SBFD by the local terminal chip
After node replys message by the SBFD that the opposite end chip is replied, further include：
Message is replied to the SBFD of reception to parse, and obtains the node state letter for identifying the opposite end SBFD nodes
The field of breath；
The field obtained will be parsed to match with the field for the local terminal chip list item being configured；
In the case of successful match, obtain for identify the opposite end SBFD nodes node status information field value.
3. according to the method described in claim 1, it is characterized in that, the node state of the local terminal SBFD nodes of reading is believed
Breath is packaged into the SBFD messages and includes：
The SBFD messages that will be encapsulated are abstracted into two parts, wherein, a part is message format part corresponding with type of service,
Another part is the identical corresponding message content part of payload；
According to the two parts being abstracted into, the node status information of the local terminal SBFD nodes of reading is packaged into the SBFD and is reported
Text.
4. according to the method in any one of claims 1 to 3, which is characterized in that
The local terminal chip list item includes at least one of：It is local terminal SBFD nodes or opposite end SBFD sections for identifying node
The DsMa.sBfdType list items of point；For representing the sending cycle information of local terminal SBFD nodes, overtime detection time and association
Discuss the DsBfdMep list items of operation result；SBFD for preserving local terminal SBFD nodes safeguards the value key's of endpoint
DsEgressXcOamBfdHashKey list items；For preserving the DsMa list items of the edit action of local terminal SBFD nodes；For representing
The localStat list items of the state machine information of local terminal SBFD nodes；
Alternatively,
The opposite end chip list item includes at least one of：It is local terminal SBFD nodes or opposite end SBFD sections for identifying node
The DsMa.sBfdType list items of point；For representing the sending cycle information of opposite end SBFD nodes, overtime detection time and association
Discuss the DsBfdMep list items of operation result；SBFD for preserving opposite end SBFD nodes safeguards the value key's of endpoint
DsEgressXcOamBfdHashKey list items；For preserving the DsMa list items of the edit action of opposite end SBFD nodes；For representing
The localStat list items of the state machine information of opposite end SBFD nodes.
5. a kind of seamless bidirectional forwarding detection (BFD) method, which is characterized in that including：
The seamless two-way converting that the transmission of local terminal chip is received by opposite end chip detects SBFD messages, wherein, the SBFD reports
The node status information of local terminal SBFD nodes read from local terminal chip list item by the local terminal chip is packaged in text,
In, the local terminal chip list item that SBFD is carried out for the local terminal SBFD nodes is configured in the local terminal chip, in institute
State the opposite end chip list item for being configured in the chip of opposite end and the SBFD being carried out for opposite end SBFD nodes；
It is identified by the opposite end chip according to the SBFD messages that opposite end chip list item docking receives, obtains institute
State the node status information of local terminal SBFD nodes；
SBFD is replied to the local terminal chip by the opposite end chip and replys message, wherein, the SBFD is replied to be sealed in message
Equipped with the node status information of the opposite end SBFD nodes read from the opposite end chip list item by the opposite end chip.
6. according to the method described in claim 5, it is characterized in that, by the opposite end chip according to the opposite end chip list item
The SBFD messages received are identified, the node status information for obtaining the local terminal SBFD nodes includes：
The SBFD messages of reception are parsed, obtain the node status information for identifying the local terminal SBFD nodes
Field；
The field obtained will be parsed to match with the field for the opposite end chip list item being configured；
In the case of successful match, obtain for identify the local terminal SBFD nodes node status information field value.
7. according to the method described in claim 5, it is characterized in that, according to User Data Protocol port UDP port 7784 or
Person related channel program head type 0x0008ACH Type 0x0008, by the opposite end chip according to the opposite end chip list item pair
The SBFD messages received are identified, and obtain the node status information of the local terminal SBFD nodes.
8. method according to any one of claims 5 to 7, which is characterized in that by the opposite end chip to described
End chip is replied the SBFD replies message and is included：
The SBFD that will be replied replys message and is abstracted into two parts, wherein, a part is message format corresponding with type of service
Part, another part are the identical corresponding message content part of payload；
According to the two parts being abstracted into, the node status information of the opposite end SBFD nodes is packaged into the SBFD and replys report
Text；
The SBFD being packaged into according to the two parts being abstracted into is replied by the opposite end chip to the local terminal chip to reply
Message.
9. a kind of seamless two-way converting detection device, which is characterized in that including：
Package module reads the seamless two-way converting detection SBFD nodes of local terminal for passing through local terminal chip from local terminal chip list item
Node status information, and the node status information of the local terminal SBFD nodes of reading is packaged into SBFD messages, wherein,
The local terminal chip list item that SBFD is carried out for the local terminal SBFD nodes is configured in the local terminal chip, in opposite end chip
In be configured with the opposite end chip list item that the SBFD is carried out for opposite end SBFD nodes；
Sending module, for the SBFD messages of encapsulation to be sent to the opposite end SBFD nodes by the local terminal chip,
Wherein, the SBFD messages obtain the local terminal SBFD nodes for the opposite end SBFD nodes by the opposite end chip list item
Node status information；
First receiving module, for pass through the local terminal chip receive the opposite end SBFD nodes pass through the opposite end chip return
Multiple SBFD replys message, wherein, the SBFD replys the node status information that the opposite end SBFD nodes are packaged in message.
10. a kind of seamless two-way converting detection device, which is characterized in that including：
Second receiving module, for passing through the seamless two-way converting detection SBFD reports that opposite end chip receives the transmission of local terminal chip
Text, wherein, it is packaged in the SBFD messages and is saved by the local terminal SBFD that the local terminal chip is read from local terminal chip list item
The node status information of point, wherein, the institute that SBFD is carried out for the local terminal SBFD nodes is configured in the local terminal chip
Local terminal chip list item is stated, the opposite end chip list that the SBFD is carried out for opposite end SBFD nodes is configured in the opposite end chip
；
Identification module, for pass through the opposite end chip according to the opposite end chip list item SBFD messages that receive of docking into
Row identification obtains the node status information of the local terminal SBFD nodes；
Module is replied, SBFD reply messages are replied to the local terminal chip for passing through the opposite end chip, wherein, the SBFD
It replys and the opposite end SBFD nodes that are read from the opposite end chip list item by the opposite end chip is packaged in message
Node status information.
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