CN109981414A - The acquisition methods of number of dropped packets between mpls network node - Google Patents
The acquisition methods of number of dropped packets between mpls network node Download PDFInfo
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- CN109981414A CN109981414A CN201910253140.2A CN201910253140A CN109981414A CN 109981414 A CN109981414 A CN 109981414A CN 201910253140 A CN201910253140 A CN 201910253140A CN 109981414 A CN109981414 A CN 109981414A
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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
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
- H04L43/0835—One way packet loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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Abstract
The acquisition methods of number of dropped packets between mpls network node, belong to the communications field, for obtaining the number of dropped packets of TMP, TMC, TMS layer in mpls network in two MEP internodal data packet transmittance process, it is characterized in that, TMP, TMC, TMS layers of LMM message is carried out between the first MEP node and the 2nd MEP node and LMR message sends and receives, and in the LMM message and LMR message sent and received obtains TxFcf, RxFCf, TxFCb and RxFCb numerical value in TMP, TMC, TMS layers respectively to carry out the calculating of number of dropped packets.Because the data transmission number of dropped packets at tri- layers of TMC, TMP, TMS of test uses same LMM, LMR data frame, it is once transferred in the 2nd MEP node process from the first MEP node, the specific fields in LMM and LMR message by obtaining different moments: the numerical value of TxFcf, RxFCf, TxFCb and RxFCb, number of dropped packets is transmitted by the data that specific formula can be calculated tri- layers of TMC, TMP, TMS during LMM, LMR message sends and receives, process is simple, it is easy to accomplish, and accuracy is high.
Description
Technical field
The present invention relates to field of network data transmission, and in particular to the acquisition side of number of dropped packets between a kind of mpls network node
Method.
Background technique
Multiprotocol label switching (Multi-Protocol Label Switching, MPLS) network by MPLS node with
The various forms of ports NNI (network-side port) are in communication with each other connection and form, and the client traffics such as E1/T1, FE, GE, 10GE are logical
Uni port (user-side port) access network is crossed, corresponding TMC (Transport MPLS is selected after operation layer is handled
Channel, circuit layer), the TMC of identical routing is tied in TMP, and business is transmitted by the side the NNI tunnel TMP.In MPLS network
In, there are tri- network layers of TMC, TMP, TMS.
Wherein, TMC (T-MPLS Channel) provides T-MPLS transmission net service channel, and a TMC connection transmits one
Client traffic entity (including a single client traffic or one group of client traffic).
TMP (T-MPLS Path), provides transmission net interface channel, and a TMP is connected between the boundary in the domain TMP and transmits
One or more TMC signals.
TMS (T-MPLS Section), optional TMS provide section layer function, provide between two adjacent T-MPLS nodes
OAM monitoring.Due to being one-to-one between TMS example and service layer path, so, it does not need label.Moreover, service layer
Path must be point-to-point.
Mpls Network Packet Loss measurement (LM: packet loss measures Loss Measurement), the function is by safeguarding end to opposite end
Point sends request OAM message, and receives the response OAM message (LM message) of opposite end maintenance endpoint, is carried by calculating in message
Maintenance endpoint sending and receiving packet accouter value realize packet loss performance statistics.When the function operation is in aggressive mode, pass through company
Continuous property detection OAM message is realized.If work measures OAM message by special packet loss and realizes in on-demand mode.It is special to lose
The information that packet measurement OAM message carries includes: special tag, OAM frame head (OAM type FT, version number, flag bit etc.), counts
Device (local counter when the value of local counter, purpose MEP receive packet loss measured message when source MEP sends packet loss measured message
Value, purpose MEP return time delay measured message when local counter value.
By above procedure it is found that existing TMC, TMP, TMS number of dropped packets test method is more complicated, need in two MEP
Individually designed three kinds different data test packets carry out transmitting and receiving process to test between node, realize more complicated, Er Qieduo
Secondary transmitting and receiving process causes process to be easy error more due to needing three kinds of data packets.
Summary of the invention
The present invention is in order to solve in above-mentioned MPLS network, in order to calculate the packet loss of each layer data transmission of two MEP nodes
Number needs to design three kinds of different data test packets and realizes cumbersome, and the problem of being easy error is, and it is an object of the present invention to provide a kind of mpls net
The calculation method of each level number of dropped packets between network node.
The present invention provides technical solution below thus:
The present invention provides a kind of acquisition methods of each level number of dropped packets between mpls network node, for obtaining in mpls network
The number of dropped packets of TMP, TMC, TMS layer in two MEP internodal data packet transmittance process, which is characterized in that in the first MEP node
TMP, TMC, TMS layers of LMM message is carried out between the 2nd MEP node and LMR message sends and receives, and is being sent and connect
TxFcf, RxFCf, TxFCb and RxFCb numerical value obtained respectively in TMP, TMC, TMS layers in the LMM message and LMR message of receipts comes
Carry out the calculating of number of dropped packets.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, according to formula
Distal end number of dropped packets=| TxFCf [T2]-TxFCf [T1] |-| RxFCf [T2]-RxFCf [T1] |,
Proximal end number of dropped packets=| TxFCb [T2] -- TxFCb [T1] |-| RxFCb [T2]-RxFCb [T1] |,
Corresponding TMC, TMP, TMS layer of distal end number of dropped packets and proximal end number of dropped packets are calculated,
Wherein, TxFCf [T2] is the TxFCf numerical value obtained at the T2 moment, and TxFCf [T1] is the TxFCf number obtained at the T1 moment
Value, RxFCf [T2] are the RxFCf numerical value obtained at the T2 moment, and RxFCf [T1] is the RxFCf numerical value obtained at the T1 moment, TxFCb
[T2] is the TxFCb numerical value obtained at the T2 moment, and TxFCb [T1] is the TxFCb numerical value obtained at the T1 moment, when RxFCb [T2] is T2
The RxFCb numerical value obtained is carved, RxFCb [T1] is the RxFCb numerical value obtained at the T1 moment.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign,
Sending and receiving for LMM message and LMR message, LMM report are carried out between first MEP node and the 2nd MEP node
The customized heading of the chip encapsulation having the same of text, LMR message and TMP layers of OAM message obtains LMM message and LMR report
TxFcf, RxFCf, TxFCb and RxFCb numerical value of the text in the TMP layer at T1 and T2 moment；
Sending and receiving for LMM message and LMR message, LMM report are carried out between first MEP node and the 2nd MEP node
The customized heading of the chip encapsulation having the same of text, LMR message and TMC layers of OAM message obtains LMM message and LMR report
TxFcf, RxFCf, TxFCb and RxFCb numerical value of the text in the TMC layer at T1 and T2 moment；
Sending and receiving for LMM message and LMR message, LMM report are carried out between first MEP node and the 2nd MEP node
The customized heading of the chip encapsulation having the same of text, LMR message and TMS layers of OAM message obtains LMM message and LMR report
TxFCf, RxFCf, TxFCb and RxFCb numerical value of the text in the TMS layer at T1 and T2 moment.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, for TMP layers,
When the OAM message of transmission is LMM message, just by the transmitting counter number of the service layer LSP of the first MEP node
It is worth the numerical value as TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
The count pick up device numerical value of LSP is as RxFCf numerical value；
When the OAM message of transmission is LMR message, by the transmitting counter numerical value of the service layer LSP of the first MEP node
Numerical value as TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
The count pick up device numerical value of LSP is as RxFCb numerical value.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, as soon as it parses the OPCODE field in LMM message when the LMM message content that MEP node receives is management message and opens
Transmitting counter or the count pick up device of corresponding service layer LSP is opened to be calculated.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, for TMC layers,
When the OAM message of transmission is LMM message, just by the transmitting counter number of the service layer PW of the first MEP node
It is worth the numerical value as TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
The count pick up device numerical value of PW is as RxFCf numerical value；
When the OAM message of transmission is LMR message, by the transmitting counter numerical value of the service layer PW of the first MEP node
Numerical value as TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
The count pick up device numerical value of PW is as RxFCb numerical value.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, as soon as it parses the OPCODE field in LMM message when the LMM message content that MEP node receives is management message and opens
Transmitting counter or the count pick up device of corresponding service layer PW is opened to be calculated.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, for TMS layers,
When the OAM message of transmission is LMM message, by the transmission meter of the logic port of the service layer of the first MEP node
Numerical value of the number device numerical value as TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
Logic port count pick up device numerical value as RxFCf numerical value；
When the OAM message of transmission is LMR message, by the transmission meter of the logic port of the service layer of the first MEP node
Numerical value of the number device numerical value as TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the service layer of the 2nd MEP node
Logic port count pick up device numerical value as RxFCb numerical value.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, as soon as it parses the OPCODE field in LMM message when the LMM message content that MEP node receives is management message and opens
Transmitting counter or the count pick up device of corresponding service layer logic port are opened to be calculated.
The acquisition methods of each level number of dropped packets, can also have such spy between mpls network node provided by the invention
Sign, wherein the difference of T1 and T2 is greater than or equal to 1 minute.
The function and effect of the present invention is: each level number of dropped packets between mpls network node involved according to the present invention
Acquisition methods, because the data transmission number of dropped packets at tri- layers of TMC, TMP, TMS of test uses unified LMM, LMR data
Frame is once transferred in the 2nd MEP node process from the first MEP node, by LMM the and LMR message for obtaining different moments
In specific fields: the numerical value of TxFcf, RxFCf, TxFCb and RxFCb, can be in LMM, a LMR by specific formula
Tri- layers of TMC, TMP, TMS of data transmission number of dropped packets is calculated in message during sending and receiving, process is simple, is easy real
It is existing, and accuracy is high.
Detailed description of the invention
Fig. 1 is application scenarios schematic diagram in the embodiment of the present invention；
Fig. 2 illustrates the step of the acquisition methods of each level number of dropped packets between the mpls network node in the embodiment of the present invention
Figure；
Fig. 3 process that LMM and LMR is sent and received between the first MEP node of TMP layer and the 2nd MEP node is shown
It is intended to；
Fig. 4 process that LMM and LMR is sent and received between the first MEP node of TMC layer and the 2nd MEP node is shown
It is intended to；And
Fig. 5 process that LMM and LMR is sent and received between the first MEP node of TMS layer and the 2nd MEP node is shown
It is intended to.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
The meaning of the english abbreviation referred in the present embodiment illustrates:
MPLS, Multi-Protocol Label Switching, multiprotocol label switching (MPLS) are a kind of for fast
The system of fast packet-switching and routing, it provides the energy such as target, routing address, forwarding and exchange for network traffic data
Power.It is more specifically that it has the mechanism for managing various different form communication streams.
MEP, Message Exchange Pattern, message exchange pattern.
LM, Loss Measurement, packet loss measurement.
TMC/TMP/TMS is the english abbreviation of T-MPLS Channel, T-MPLS Path, T-MPLS Section, in
Text is T-MPLS network vertical demixing: circuit layer (TMC:T-MPLS Channel) and passage layers (TMP:T-MPLS Path), section
Layer (TMS:T-MPLS Section).
OAM, OperationAdministration and Maintenance, operation and maintenance management agreement.
PTN, PacketTransportNetwork, Packet Transport Network.
LMM, Loss Measure Message, loss measurement message.
LMR, Loss Measure Response, loss measurement are replied.
PDU, Professional Development Units, protocol Data Unit.
NNI, Network to Network Interface, network node interface.
TP-OAM, MPLS-TP OAM are MPLS-TP (Multi-Protocol Label Switching Transport
Profile, multiprotocol label switching transmission application) by original OAM progress multi-zone supervision control, carry out the OAM of stratification i.e.
MPLS-TP operation management maintainance.
OPCODE field, the most basic unit that program executes, i.e. Operate Code, operation code.
LSP, Label Switching Path, label switched path.
FPGA, Field-Programmable GateArray, i.e. field programmable gate array.
GAL, GenericArray Logic, Common Language Runtime.
PW, Pseudo-Wire, pseudo-wire.
SPU, Synergistic Processing Unit, coprocessor.
Fig. 1 is application scenarios schematic diagram in the embodiment of the present invention.
Application scenarios of the invention are as shown in Figure 1, method of the invention is applied to the logical of two or more MEP nodes composition
The packet loss data between equipment the Device A and DeviceA of network middle line road are calculated in communication network, and then are calculated two and set
The packet loss that data are transmitted between standby.
LM divides both-end LM and single-ended LM mode, and this patent is LM message (the OAM report based on tri- layers of both-end TMC/TMP/TMS
Text one kind) optimization measurement method, carry out each level packet loss in precise measurement PTN network, and meet coherence request
LM has two kinds of OAM PDU of LMM and LMR.
Realization for LM, is summarized as follows:
(1) LM message does not embody in the customized heading of chip.By the direct analytic message format of chip, and by counter
It directly beats in the quiet lotus specific field of message.
(2) TMC, TMP and TMS layers of counter is all got in message in the side NNI.
(3) about the agreement of this station counting unit: the TP-OAM message of all our station transmitting-receivings, not in respective level counter
In count.
It integrates and says, the acquisition methods of each level number of dropped packets between the mpls network node of the present embodiment, for obtaining
The number of dropped packets of TMP, TMC, TMS layer in mpls network in two MEP internodal data packet transmittance process, in the first MEP node
TMP, TMC, TMS layers of LMM message is carried out between the 2nd MEP node and LMR message sends and receives, and is being sent and connect
TxFcf, RxFCf, TxFCb and RxFCb numerical value obtained respectively in TMP, TMC, TMS layers in the LMM message and LMR message of receipts comes
Carry out the calculating of number of dropped packets.
Specifically, according to formula
Distal end number of dropped packets=| TxFCf [T2]-TxFCf [T1] |-| RxFCf [T2]-RxFCf [T1] |,
Proximal end number of dropped packets=| TxFCb [T2] -- TxFCb [T1] |-| RxFCb [T2]-RxFCb [T1] |,
Corresponding TMC, TMP, TMS layer of distal end number of dropped packets and proximal end number of dropped packets are calculated,
Wherein, TxFCf [T2] is the TxFCf numerical value obtained at the T2 moment, and TxFCf [T1] is the TxFCf number obtained at the T1 moment
Value, RxFCf [T2] are the RxFCf numerical value obtained at the T2 moment, and RxFCf [T1] is the RxFCf numerical value obtained at the T1 moment, TxFCb
[T2] is the TxFCb numerical value obtained at the T2 moment, and TxFCb [T1] is the TxFCb numerical value obtained at the T1 moment, when RxFCb [T2] is T2
The RxFCb numerical value obtained is carved, RxFCb [T1] is the RxFCb numerical value obtained at the T1 moment.
Specifically, the corresponding TxFCf [T2] of three layers of TMP, TMC, TMS layer in above-mentioned formula, TxFCf [T1], RxFCf
[T2], RxFCf [T1], TxFCb [T2], TxFCb [T1], RxFCb [T2], RxFCb [T1] numerical value are saved by following first MEP
The count value of LMM message during point and the sending and receiving of the 2nd MEP node and the corresponding field in LMR message figure obtains
, i.e., the acquisition methods of each level number of dropped packets specifically include following steps S1 and S2 between the mpls network node of the present embodiment.
Fig. 2 illustrates the step of the acquisition methods of each level number of dropped packets between the mpls network node in the embodiment of the present invention
Figure.
Step S1 carries out TMP, TMC, TMS layers of LMM message and LMR between the first MEP node and the 2nd MEP node
Message sends and receives, and is obtained in TMP, TMC, TMS layers respectively in the LMM message and LMR message sent and received
TxFcf, RxFCf, TxFCb and RxFCb numerical value.The specific step includes following three parallel sub-step S1-1, S1-2, S1-
3。
Parallel step S1-1, carried out between the first MEP node and the 2nd MEP node LMM message and LMR message transmission and
It receives, the customized heading of the chip encapsulation having the same of the LMM message, LMR message and TMP layers of OAM message obtains
LMM message and LMR: TxFcf, RxFCf, TxFCb and RxFCb numerical value of the message in the TMP layer at T1 and T2 moment.
Specifically, for TMP layers:
When the OAM message of transmission is LMM message, just by the transmitting counter number of the service layer LSP of the first MEP node
It is worth the numerical value as TxFCf；When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the 2nd MEP node
Service layer LSP count pick up device numerical value as RxFCf numerical value；When the OAM message of transmission is LMR message, by first
Numerical value of the transmitting counter numerical value of the service layer LSP of MEP node as TxFCb；It is received when the 2nd MEP node is found out
When OAM message is LMR message, just using the count pick up device numerical value of the service layer LSP of the 2nd MEP node as RxFCb numerical value.
Wherein, as soon as when the LMM message content that MEP node receives is management message, the OPCODE field in parsing LMM message is simultaneously
Transmitting counter or the count pick up device of corresponding service layer LSP is opened to be calculated.
That is, the interaction that above the first MEP node and the 2nd MEP node send and receive in progress LMM and LMR
In the process, specific process includes that LMM is sent, LMM is received, LMR is sent, LMR is received.
Fig. 3 process that LMM and LMR is sent and received between the first MEP node of TMP layer and the 2nd MEP node is shown
It is intended to.
LMM is sent:
(1) FPGA is sent to the customized heading encapsulation of chip of the message and other TMP layers of OAM of chip unanimously.LMM report
" TxFcf ", " Reserved for RxFCfin LMR ", " Reserved forTxFCb in LMR " field zero setting in text.This
In to encapsulate be unanimously in order to enable these messages are as the FPGA message in existing MEP node apparatus, so as to smooth
Sent and transmitted, it is small to the change of system to be packaged into ready-made message format, and debugging is convenient, not easy to make mistakes.LMM message
In " TxFcf ", " Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " field zero setting be for
Starting a new period wraps and counts, and when subsequent counter, the count value of acquisition is filled into these fields guarantees to pass through
Accuracy.Wherein, TxFcf is 32 bit counters, and value is the business packet transmitting counter value of LMM sending instant,
" Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " are expressed as the spare of this 4 bytes
Value, is generally defaulted as 0.
(2) after chip receives the message of D-Type=1, further it is resolved to OPCODE field.Work as OPCODE=0x2B
When, the transmitting counter numerical value of service layer LSP is filled into " TxFcf " field, the counting of corresponding TxFcf field is obtained
Value.D-type=1 means to enter OAM management Message processing process, it is meant that the not instead of service message received, management
Message, this thing need to enter the subsequent processing that related procedure is carried out in dedicated oam state machine.When the field value of this OPCODE
When for 0x2B (0x indicate 16 systems) i.e. 43, the OAM message for being expressed as the transmission of this website is LMM message, and 0x2B here is one
It is a to be used to indicate that the signal that message is LMM message marks.
(3) the acquired LSP transmitting counter of LMM.Itself is not included in wherein.
(4) LMM is sent.
LMM is received:
(1) chip is from line receiver LMM message.Being recognized by LSP+GAL+ACH is TMP layers of OAM frame, is further parsed
OPCODE field.As OPCODE=0x2B, the count pick up device that business corresponds to LSP is filled into " the Reserved of LMM message
In for RxFCfin LMR " field, the count value of RxFCf field is obtained.Same reason, when the field value of this OPCODE
When for i.e. 43 0x2B, being expressed as the received OAM message of this website is LMM message, and 0x2B here is one and is used to indicate message
It is marked for the signal of LMM message
(2) FPGA is passed to according to standard TMP OAM message format.
(3) LMM acquires LSP count pick up device, itself is not included in wherein.
(4) LMM receives process and finishes.
LMR is sent:
(1) " TxFcf " of LMM, " Reserved for RxFCfin LMR " field are copied directly to pair of LMR by FPGA
It answers in byte and (does not need to move position, directly adopt).
(2) FPGA is sent to the LMR message of chip and the customized heading of other TMP layers of OAM frame chip encapsulates unanimously.
(3)) after chip receives the message of D-Type=1, further it is resolved to OPCODE field.Work as OPCODE=0x2A
When, the transmitting counter numerical value of service layer LSP is filled into " TxFCb " field, the calculating of corresponding TxFCb field is obtained
Value.D-type=1 means to enter OAM management Message processing process, it is meant that the not instead of service message received, management
Message, this thing need to enter the subsequent processing that related procedure is carried out in dedicated oam state machine.When the field value of this OPCODE
When for i.e. 42 0x2A, the OAM message for being expressed as the transmission of this website is LMR message, and 0x2A here is one and is used to indicate message
It is marked for the signal of LMR message.
(4) after LMR acquires LSP transmitting counter, itself is not included in wherein.
(5) LMR is sent.
LMR is received:
(1) chip is from line receiver LMR message.Being recognized by LSP+GAL+ACH is TMP layers of OAM frame, is further parsed
OPCODE field.As OPCODE=0x2A, after the count pick up device that business corresponds to LSP is filled into " TxFCb " of LMR message
Four bytes in, this counter field is referred to as " RxFCb ", obtain the count value of RxFCb field.
(2) FPGA is passed to according to standard TMP OAM message format
(3) after LMR acquires LSP count pick up device, itself is not included in wherein
(4) count value (TxFcf, RxFCf, TxFCb and RxFCb) that FPGA parses four counters in LMR message is gone forward side by side
Row is read.
(5) TxFcf, RxFCf, TxFCb and RxFCb word in FPGA register are read at T1 moment and T2 moment in two times
The count value of section.Interval time is greater than or equal to 1 minute twice.
(6) LMR receives process and finishes.
Parallel step S1-2, carried out between the first MEP node and the 2nd MEP node LMM message and LMR message transmission and
It receives, the customized heading of the chip encapsulation having the same of the LMM message, LMR message and TMC layers of OAM message obtains
TxFcf, RxFCf, TxFCb and RxFCb numerical value of LMM message and LMR message in the TMC layer at T1 and T2 moment.
Specifically, for TMC layers, when the OAM message of transmission is LMM message, just by the service layer of the first MEP node
Numerical value of the transmitting counter numerical value of PW as TxFCf；Finding out the OAM message received when the 2nd MEP node is LMM message
When, just using the count pick up device numerical value of the service layer PW of the 2nd MEP node as RxFCf numerical value；When the OAM message of transmission is
When LMR message, using the transmitting counter numerical value of the service layer PW of the first MEP node as the numerical value of TxFCb；As the 2nd MEP
Node finds out the OAM message that receives when being LMR message, just by the count pick up device number of the service layer PW of the 2nd MEP node
Value is used as RxFCb numerical value.Wherein, as soon as parsing LMM message when the LMM message content that MEP node receives is management message
In OPCODE field and open transmitting counter or the count pick up device of corresponding service layer PW to be calculated.
That is, the interaction that above the first MEP node and the 2nd MEP node send and receive in progress LMM and LMR
In the process, specific process includes that LMM is sent, LMM is received, LMR is sent, LMR is received.
Fig. 4 process that LMM and LMR is sent and received between the first MEP node of TMC layer and the 2nd MEP node is shown
It is intended to.
Process flow is substantially consistent with TMP layers.
LMM is sent:
(1) FPGA is sent to the customized heading encapsulation of chip of the message and other TMC layers of OAM of chip unanimously.LMM report
" TxFcf ", " Reserved for RxFCfin LMR ", " Reserved forTxFCb in LMR " field zero setting in text.This
In to encapsulate be unanimously in order to enable these messages are as the FPGA message in existing MEP node apparatus, so as to smooth
Sent and transmitted, it is small to the change of system to be packaged into ready-made message format, and debugging is convenient, not easy to make mistakes.LMM message
In " TxFcf ", " Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " field zero setting be for
Starting a new period wraps and counts, and when subsequent counter, the count value of acquisition is filled into these fields guarantees to pass through
Accuracy.Wherein, TxFcf is 32 bit counters, and value is the business packet transmitting counter value of LMM sending instant,
" Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " are expressed as the spare of this 4 bytes
Value, is generally defaulted as 0.
(2) after inlet disk chip receives the message of D-Type=4, further it is resolved to OPCODE field.Work as OPCODE
When=0x2B, need that front-end chip is notified to get to counter in message.D-type=4 means to enter OAM management message
Treatment process, it is meant that the not instead of service message received manages message, this thing needs to enter in dedicated oam state machine
Carry out the subsequent processing of related procedure.When the field value of this OPCODE is 0x2B (0x indicates 16 systems) i.e. 43, it is expressed as
The OAM message that this website is sent is LMM message, and 0x2B here is one and is used to indicate that the signal that message is LMM message marks.
(3) after exporting the message that disk (front end) chip receives D-Type=4, further it is resolved to OPCODE field.When
When OPCODE=0x2B, the transmitting counter numerical value of service layer PW is filled into " TxFcf " field, is obtained corresponding
The count value of TxFcf field.
(4) after LMM has acquired NHI transmitting counter, itself is not included in wherein.
(5) LMM is sent.
LMM is received:
(1) chip is from line receiver LMM message.Pass through LSP+PWIt is TMC layers of OAM frame that+ACH, which is recognized, is further parsed
OPCODE field.As OPCODE=0x2B, the count pick up device that business corresponds to PW is filled into " the Reserved of LMM message
In for RxFCfin LMR " field, the count value of RxFCf field is obtained.Same reason, when the field value of this OPCODE
When for i.e. 43 0x2B, being expressed as the received OAM message of this website is LMM message, and 0x2B here is one and is used to indicate message
It is marked for the signal of LMM message.
(2) distributed forwarding chip is passed to according to standard TMC OAM message format, reaches rear end by Forwarding plane
SPUA is sent to FPGA on rear end distributed forwarding chip is direct.
(3) after LMM has acquired PW count pick up device, counter adds one certainly.
(4) LMM receives process and finishes
LMR is sent:
(1) " TxFcf " of LMM, " Reserved for RxFCfin LMR " are copied directly to the correspondence word of LMR by FPGA
It (does not need to move position, directly adopt) in section.
(2) FPGA is sent to the LMR message of chip and the customized heading of other TMC layers of OAM frame chip encapsulates unanimously.
(3) message reaches front end SPU by Forwarding plane.
(4)) after front-end chip receives the message of D-Type=4, further it is resolved to OPCODE field.Work as OPCODE=
When 0x2A, by service layerPWTransmitting counter numerical value be filled into " TxFCb " field, obtain corresponding TxFCb field
Calculated value.D-type=4 means to enter OAM management Message processing process, it is meant that the not instead of service message received,
Message is managed, this thing needs to enter the subsequent processing that related procedure is carried out in dedicated oam state machine.When the word of this OPCODE
When segment value is i.e. 42 0x2A, the OAM message for being expressed as the transmission of this website is LMR message, and 0x2A here is one and is used to indicate
Message is that the signal of LMR message marks.
(5) after LMR has acquired PW transmitting counter, itself is not included in wherein.
(6) LMR is sent.
LMR is received:
(1) front-end chip is from line receiver LMR message.Being recognized by LSP+PW+ACH is TMC layers of OAM frame, further
Parse OPCODE field.As OPCODE=0x2A, the count pick up device that business corresponds to PW is filled into LMR message
In four bytes after " TxFCb ", this counter field is referred to as " RxFCb ", obtain the count value of RxFCb field.
(2) pass through Forwarding plane according to standard TMCOAM message format, by giving rear end on the distributed forwarding chip of rear end
FPGA。
(3) after LMR has acquired PW count pick up device, itself is not included in wherein
(4) rear end FPGA parses the count value (TxFcf, RxFCf, TxFCb and RxFCb) of four counters in LMR message,
And it is read out.
(5) TxFcf, RxFCf, TxFCb and RxFCb word in FPGA register are read at T1 moment and T2 moment in two times
The count value of section.Interval time is greater than or equal to 1 minute twice.
(6) LMR receives process and finishes.
Parallel step S1-3, carried out between the first MEP node and the 2nd MEP node LMM message and LMR message transmission and
It receives, the customized heading of the chip encapsulation having the same of the LMM message, LMR message and TMS layers of OAM message obtains
TxFCf, RxFCf, TxFCb and RxFCb numerical value of LMM message and LMR message in the TMS layer at T1 and T2 moment.
Specifically, for TMS layers, when the OAM message of transmission is LMM message, by patrolling for the service layer of the first MEP node
Collect numerical value of the transmitting counter numerical value of port as TxFCf；When the 2nd MEP node finds out the OAM message received as LMM report
Wen Shi, just using the count pick up device numerical value of the logic port of the service layer of the 2nd MEP node as RxFCf numerical value；Work as transmission
OAM message be LMR message when, using the transmitting counter numerical value of the logic port of the service layer of the first MEP node as
The numerical value of TxFCb；When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the business of the 2nd MEP node
The count pick up device numerical value of the logic port of level is as RxFCb numerical value.Wherein, when in the LMM message that the first MEP node receives
When holding to manage message, just parses the OPCODE field in LMM message and open the transmission meter of corresponding service layer logic port
Device or count pick up device are counted to be calculated.
That is, the interaction that above the first MEP node and the 2nd MEP node send and receive in progress LMM and LMR
In the process, specific process includes that LMM is sent, LMM is received, LMR is sent, LMR is received.
Fig. 5 process that LMM and LMR is sent and received between the first MEP node of TMS layer and the 2nd MEP node is shown
It is intended to.
Process flow is substantially consistent with TMP layers.
LMM is sent:
(1) FPGA is sent to the customized heading encapsulation of chip of the message and other TMP layers of OAM of chip unanimously.LMM report
" TxFcf ", " Reserved for RxFCfin LMR ", " Reserved forTxFCb in LMR " field zero setting in text.This
In to encapsulate be unanimously in order to enable these messages are as the FPGA message in existing MEP node apparatus, so as to smooth
Sent and transmitted, it is small to the change of system to be packaged into ready-made message format, and debugging is convenient, not easy to make mistakes.LMM message
In " TxFcf ", " Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " field zero setting be for
Starting a new period wraps and counts, and when subsequent counter, the count value of acquisition is filled into these fields guarantees to pass through
Accuracy.Wherein, TxFcf is 32 bit counters, and value is the business packet transmitting counter value of LMM sending instant,
" Reserved for RxFCf in LMR ", " Reserved forTxFCb in LMR " are expressed as the spare of this 4 bytes
Value, is generally defaulted as 0.
(2) after chip receives the message of D-Type=3, further it is resolved to OPCODE field.Work as OPCODE=0x2B
When, the transmitting counter numerical value of service layer logic port is filled into " TxFcf " field.At TMS layers, D-type=1 anticipates
Taste enter OAM management Message processing process, it is meant that the not instead of service message received, manage message, this thing need
Into the subsequent processing for carrying out related procedure in dedicated oam state machine.When the field value of this OPCODE is that (0x is indicated 0x2B
16 systems) i.e. 43 when, be expressed as this website transmission OAM message be LMM message, 0x2B here be one be used to indicate message
It is marked for the signal of LMM message.
(3) after LMM has acquired transmitting counter, itself is not included in wherein
(4) LMM is sent
LMM is received:
(1) chip is from line receiver LMM message.Being recognized by GAL+ACH is TMS layers of OAM frame, is further parsed
OPCODE field.As OPCODE=0x2B, the count pick up device of business counterlogic interface is filled into LMM message
In " Reserved for RxFCfin LMR " field, the count value of RxFCf field is obtained.Same reason, when this
When the field value of OPCODE is i.e. 43 0x2B, being expressed as the received OAM message of this website is LMM message, and 0x2B here is one
It is a to be used to indicate that the signal that message is LMM message marks.
(2) FPGA is passed to according to standard TMS OAM message format.
(3) after LMM has acquired count pick up device, itself is not included in wherein.
(4) LMM receives process and finishes.
LMR is sent:
(1) " TxFcf " of LMM, " Reserved for RxFCfin LMR " are copied directly to the correspondence word of LMR by FPGA
It (does not need to move position, directly adopt) in section.
(2) FPGA is sent to the LMR message of chip and the customized heading of other TMS layers of OAM frame chip encapsulates unanimously.
(3)) after chip receives the message of D-Type=3, further it is resolved to OPCODE field.Work as OPCODE=0x2A
When, the transmitting counter numerical value of service layer logic port is filled into " TxFCb " field, corresponding TxFCb field is obtained
Calculated value.In TMS layers, D-type=3 means to enter OAM management Message processing process, it is meant that is received is not
Service message, but message is managed, this thing needs to enter the subsequent processing that related procedure is carried out in dedicated oam state machine.When
When the field value of this OPCODE is i.e. 42 0x2A, the OAM message for being expressed as the transmission of this website is LMR message, 0x2A here
It is one and is used to indicate that the signal that message is LMR message marks.
(4) after LMR has acquired transmitting counter, itself is not included in wherein.
(5) LMR is sent.
LMR is received:
(1) chip is from line receiver LMR message.Being recognized by GAL+ACH is TMS layers of OAM frame, is further parsed
OPCODE field.As OPCODE=0x2A, the count pick up device of business counterlogic interface is filled into LMR message
In four bytes after " TxFCb ", this counter field is referred to as " RxFCb ", obtain the count value of RxFCb field.
(2) FPGA is passed to according to standard TMS OAM message format.
(3) after LMR has acquired LSP count pick up device, itself is not included in wherein.
(4) count value (TxFcf, RxFCf, TxFCb and RxFCb) that FPGA parses four counters in LMR message is gone forward side by side
Row is read.
(5) TxFcf, RxFCf, TxFCb and RxFCb word in FPGA register are read at T1 moment and T2 moment in two times
The count value of section.Interval time is greater than or equal to 1 minute twice.
(6) LMR receives process and finishes.
Step S2, according to formula
Distal end number of dropped packets=| TxFCf [T2]-TxFCf [T1] |-| RxFCf [T2]-RxFCf [T1] |,
Proximal end number of dropped packets=| TxFCb [T2]-TxFCb [T1] |-| RxFCb [T2]-RxFCb [T1] |,
Calculate corresponding TMC, TMP, TMS layer of distal end number of dropped packets and proximal end number of dropped packets.
Wherein, TxFCf [T2] is the TxFCf numerical value obtained at the T2 moment, and TxFCf [T1] is the TxFCf number obtained at the T1 moment
Value, RxFCf [T2] are the RxFCf numerical value obtained at the T2 moment, and RxFCf [T1] is the RxFCf numerical value obtained at the T1 moment, TxFCb
[T2] is the TxFCb numerical value obtained at the T2 moment, and TxFCb [T1] is the TxFCb numerical value obtained at the T1 moment, when RxFCb [T2] is T2
The RxFCb numerical value obtained is carved, RxFCb [T1] is the RxFCb numerical value obtained at the T1 moment.
Specifically, the corresponding TxFCf [T2] of three layers of TMP, TMC, TMS layer in above-mentioned formula, TxFCf [T1], RxFCf
[T2], RxFCf [T1], TxFCb [T2], TxFCb [T1], RxFCb [T2], RxFCb [T1] numerical value are saved by above-mentioned first MEP
The count value of LMM message during point and the sending and receiving of the 2nd MEP node and the corresponding field in LMR message figure obtains
's.
It integrates, the invention thinking according to description the method for the present invention of above step S1 and step S2 is in fact:
Firstly, LM carries out single-ended measurement on demand, after starting the function, carries local terminal and send service message number statistical value
TxFCf sends LMM OAM message to opposite end maintenance endpoint；
Then, after receiving end receives LMM OAM message, message is revised as LMR OAM message, and add connecing for local terminal
It receives service message number statistical value RxFCf and local terminal sends service message number statistical value TxFCb and message is passed back to transmitting terminal；
Finally, after transmitting terminal receives LMR OAM message, according to the reception industry of TxFCf, RxFCf, TxFCb and local terminal
Message number statistical value of being engaged in calculates number of dropped packets, and carry out packet loss etc. further calculates.
Detailed Jie specifically is done to the detailed process during each layer send and receive above according to TMP, TMC, TMS layers
It continues, it is noted that introduce for convenience, TMP, TMC, TMS layers separate, successively introduce, but actually these send, receive
Process disposably carries out simultaneously, and there is no points of sequencing.
The effect of the present embodiment and effect are: each level packet loss between the mpls network node according to involved in the present embodiment
Several acquisition methods, because the data transmission number of dropped packets at tri- layers of TMC, TMP, TMS of test uses unified LMM, LMR number
It according to frame, is once transferred in the 2nd MEP node process from the first MEP node, is reported by the LMM and LMR that obtain different moments
Specific fields in text: the numerical value of TxFcf, RxFCf, TxFCb and RxFCb, by specific formula can a LMM,
Tri- layers of TMC, TMP, TMS of data transmission number of dropped packets is calculated in LMR message during sending and receiving, process is simple, is easy
It realizes, and accuracy is high.
Further, the present embodiment it is at all levels logical can to calculate rapidly MPLS-TP in the limited situation of resources of chip
The number of dropped packets in road simultaneously further calculates packet loss, and can be by the consistency of each packet loss of comparison, to analyze industry at all levels
The real-time behavior in business channel.
Claims (10)
1. the acquisition methods of number of dropped packets between a kind of mpls network node, for obtaining two MEP internodal datas in mpls network
The number of dropped packets of TMP, TMC, TMS layer in packet transmittance process, which is characterized in that between the first MEP node and the 2nd MEP node
The LMM message of TMP, TMC, TMS layers of progress and sending and receiving for LMR message, and in the LMM message and LMR sent and received
TxFcf, RxFCf, TxFCb and RxFCb numerical value in TMP, TMC, TMS layers are obtained in message respectively to carry out the meter of number of dropped packets
It calculates.
2. the acquisition methods of number of dropped packets between mpls network node according to claim 1, it is characterised in that:
According to formula:
Distal end number of dropped packets=| TxFCf [T2]-TxFCf [T1] |-| RxFCf [T2]-RxFCf [T1] |,
Proximal end number of dropped packets=| TxFCb [T2]-TxFCb [T1] |-| RxFCb [T2]-RxFCb [T1] |,
Corresponding TMC, TMP, TMS layer of distal end number of dropped packets and proximal end number of dropped packets are calculated,
Wherein, TxFCf [T2] is the TxFCf numerical value obtained at the T2 moment, and TxFCf [T1] is the TxFCf numerical value obtained at the T1 moment,
RxFCf [T2] is the RxFCf numerical value obtained at the T2 moment, and RxFCf [T1] is the RxFCf numerical value obtained at the T1 moment, and TxFCb [T2] is
The TxFCb numerical value that the T2 moment obtains, TxFCb [T1] are the TxFCb numerical value obtained at the T1 moment, and RxFCb [T2] is to obtain at the T2 moment
RxFCb numerical value, RxFCb [T1] is the RxFCb numerical value that obtains of T1 moment.
3. the acquisition methods of number of dropped packets between mpls network node according to claim 1, it is characterised in that:
Carry out sending and receiving for LMM message and LMR message between first MEP node and the 2nd MEP node, the LMM message,
The customized heading of the chip encapsulation having the same of LMR message and TMP layers of OAM message obtains LMM message and LMR message
In TxFcf, RxFCf, TxFCb and RxFCb numerical value of the TMP layer at T1 and T2 moment；
Carry out sending and receiving for LMM message and LMR message between first MEP node and the 2nd MEP node, the LMM message,
The customized heading of the chip encapsulation having the same of LMR message and TMC layers of OAM message obtains LMM message and LMR message
In TxFcf, RxFCf, TxFCb and RxFCb numerical value of the TMC layer at T1 and T2 moment；
Carry out sending and receiving for LMM message and LMR message between first MEP node and the 2nd MEP node, the LMM message,
The customized heading of the chip encapsulation having the same of LMR message and TMS layers of OAM message obtains LMM message and LMR message
In TxFCf, RxFCf, TxFCb and RxFCb numerical value of the TMS layer at T1 and T2 moment.
4. the acquisition methods of number of dropped packets between mpls network node according to claim 3, it is characterised in that:
For TMP layers
When the OAM message of transmission is LMM message, just the transmitting counter numerical value of the service layer LSP of the first MEP node is made
For the numerical value of TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the service layer LSP of the 2nd MEP node
Count pick up device numerical value as RxFCf numerical value；
When the OAM message of transmission be LMR message when, using the transmitting counter numerical value of the service layer LSP of the first MEP node as
The numerical value of TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the service layer LSP of the 2nd MEP node
Count pick up device numerical value as RxFCb numerical value.
5. the acquisition methods of number of dropped packets between mpls network node according to claim 4, it is characterised in that:
Wherein, as soon as parsing the OPCODE word in LMM message when the LMM message content that MEP node receives is management message
Section simultaneously opens transmitting counter or the count pick up device of corresponding service layer LSP to be calculated.
6. the acquisition methods of number of dropped packets between mpls network node according to claim 3, it is characterised in that:
For TMC layers
When the OAM message of transmission is LMM message, just the transmitting counter numerical value of the service layer PW of the first MEP node is made
For the numerical value of TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message received, just by the service layer PW's of the 2nd MEP node
Count pick up device numerical value is as RxFCf numerical value；
When the OAM message of transmission be LMR message when, using the transmitting counter numerical value of the service layer PW of the first MEP node as
The numerical value of TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message received, just by the service layer PW's of the 2nd MEP node
Count pick up device numerical value is as RxFCb numerical value.
7. the acquisition methods of number of dropped packets between mpls network node according to claim 6, it is characterised in that:
Wherein, as soon as parsing the OPCODE word in LMM message when the LMM message content that MEP node receives is management message
Section simultaneously opens transmitting counter or the count pick up device of corresponding service layer PW to be calculated.
8. the acquisition methods of number of dropped packets between mpls network node according to claim 3, it is characterised in that:
For TMS layers
When the OAM message of transmission is LMM message, by the transmitting counter of the logic port of the service layer of the first MEP node
Numerical value of the numerical value as TxFCf；
When it is LMM message that the 2nd MEP node, which finds out the OAM message that receives, just patrolling the service layer of the 2nd MEP node
The count pick up device numerical value of port is collected as RxFCf numerical value；
When the OAM message of transmission is LMR message, by the transmitting counter of the logic port of the service layer of the first MEP node
Numerical value of the numerical value as TxFCb；
When it is LMR message that the 2nd MEP node, which finds out the OAM message that receives, just patrolling the service layer of the 2nd MEP node
The count pick up device numerical value of port is collected as RxFCb numerical value.
9. the acquisition methods of number of dropped packets between mpls network node according to claim 8, it is characterised in that:
Wherein, as soon as parsing the OPCODE word in LMM message when the LMM message content that MEP node receives is management message
Section simultaneously opens transmitting counter or the count pick up device of corresponding service layer logic port to be calculated.
10. the acquisition methods of number of dropped packets between mpls network node according to claim 2, it is characterised in that:
Wherein, the difference of T1 and T2 is greater than or equal to 1 minute.
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