CN110166311B - Method, equipment and network system for measuring network performance - Google Patents

Method, equipment and network system for measuring network performance Download PDF

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Publication number
CN110166311B
CN110166311B CN201810152261.3A CN201810152261A CN110166311B CN 110166311 B CN110166311 B CN 110166311B CN 201810152261 A CN201810152261 A CN 201810152261A CN 110166311 B CN110166311 B CN 110166311B
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performance measurement
measurement parameter
timestamp
count value
ltm
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CN110166311A (en
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姚鹏
陈志国
叶青
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2018/100620 priority patent/WO2019157802A1/en
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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
    • H04L43/0852—Delays
    • 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
    • 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
    • H04L43/106—Active monitoring, e.g. heartbeat, ping or trace-route using time related information in packets, e.g. by adding timestamps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Abstract

A method of measuring network performance, a network device, a network system, and a computer-readable storage medium are provided. The method comprises the following steps: the method comprises the steps that a first device sends a Link Tracking Message (LTM) to a second device, wherein the LTM comprises a first performance measurement parameter; the first device receiving a link trace reply, LTR, sent by the second device, the LTR responsive to the LTM, the LTR including a second performance measurement parameter and a third performance measurement parameter; the first device obtains a fourth performance measurement parameter, and obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter. By adopting the technical scheme, the time delay/packet loss performance statistics of the service path can be finished end to end at one time, and the operation and maintenance efficiency is improved.

Description

Method, equipment and network system for measuring network performance
Technical Field
The application belongs to the technical field of communication, and relates to a method, equipment and a network system for measuring network performance.
Background
The multi-protocol label switching (MPLS) operation, maintenance, and administration (OAM) is used to detect packet loss, delay, and jitter in an MPLS network. Ethernet OAM (ethernet OAM, ETHOAM) is used to implement end-to-end packet loss, delay and jitter detection across domains. Since MPLS OAM can only detect packet loss and delay in a segment end to end in a domain, it cannot detect packet loss and delay at a User Network Interface (UNI) side, and ETHOAM supports cross-domain end to end packet loss and delay detection, but needs to be deployed in a segment, which is complicated and complicated.
Disclosure of Invention
A method, network device, network system, and computer-readable storage medium for measuring network performance are provided. These schemes may make end-to-end network performance detection easier to implement.
According to a first aspect of the present application, a method of measuring network performance comprises: the method comprises the steps that a first device sends a Link Tracking Message (LTM) to a second device, wherein the LTM comprises a first performance measurement parameter; the first device receiving a link trace reply, LTR, sent by the second device, the LTR responsive to the LTM, the LTR including a second performance measurement parameter and a third performance measurement parameter; the first device obtains a fourth performance measurement parameter, and obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter.
According to a second aspect of the present application, a method of measuring network performance, comprises: the method comprises the steps that a Link Tracking Message (LTM) sent by a first device is received by a second device, wherein the LTM comprises a first performance measurement parameter; the second equipment obtains a second performance measurement parameter and a third performance measurement parameter according to the LTM; the second device returning a link tracking response LTR to the first device, the LTR responsive to the LTM, the LTR including the second performance measurement parameter and the third performance measurement parameter; the LTR is configured to enable the first device to obtain a fourth performance measurement parameter when receiving the LTR, and obtain a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
On the basis of the first or second aspect, the first performance measurement parameter includes a first count value when the first device issues the LTM, the second performance measurement parameter includes a second count value when the second device receives the LTM, the third performance measurement parameter includes a third count value when the second device issues the LTR, and the fourth performance measurement parameter includes a fourth count value when the first device receives the LTR; and the first equipment acquires the packet loss number between the first equipment and the second equipment according to the first count value, the second count value, the third count value and the fourth count value.
On the basis of the first or second aspect, the first performance measurement parameter comprises a first timestamp at which the LTM was sent by the first device, the second performance measurement parameter comprises a second timestamp at which the LTM was received by the second device, the third performance measurement parameter comprises a third timestamp at which the LTR was issued by the second device, and the fourth performance measurement parameter comprises a fourth timestamp at which the LTR was received by the first device; the first device obtains the network delay between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
On the basis of the first or second aspect, the first performance measurement parameter includes a first count value when the first device issues the LTM and a first timestamp when the first device transmits the LTM, the second performance measurement parameter includes a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameter includes a third count value when the second device issues the LTR and a third timestamp when the second device issues the LTR, and the fourth performance measurement parameter includes a fourth count value when the first device receives the LTR and a fourth timestamp when the first device receives the LTR; the first device obtains a packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value; the first device obtains the network delay between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
According to a third aspect of the present application, a second device includes a transceiver module and a processing module, where the transceiver module is configured to receive a link tracking message LTM sent by a first device, and the LTM includes a first performance measurement parameter; the processing module is configured to obtain a second performance measurement parameter and a third performance measurement parameter according to the LTM, and the transceiver module is configured to send a link tracking response LTR corresponding to the LTM to the first device, where the LTR includes the second performance measurement parameter and the third performance measurement parameter, so that the first device obtains a fourth performance measurement parameter, and obtains a network performance measurement parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
On the basis of the third aspect, the first performance measurement parameter includes a first count value when the first device sends out the LTM, the second performance measurement parameter includes a second count value when the transceiver module receives the LTM, the third performance measurement parameter includes a third count value when the transceiver module sends out the LTR, and the fourth performance measurement parameter includes a fourth count value when the first device receives the LTR.
On the basis of the third aspect, the first performance measurement parameter comprises a first timestamp at which the LTM was sent by the first device, the second performance measurement parameter comprises a second timestamp at which the LTM was received by the transceiver module, the third performance measurement parameter comprises a third timestamp at which the LTR was emitted by the transceiver module, and the fourth performance measurement parameter comprises a fourth timestamp at which the LTR was received by the first device.
On the basis of the third aspect, the first performance measurement parameter includes a first count value when the LTM is issued by the first device and a first timestamp when the LTM is sent by the first device, the second performance measurement parameter includes a second count value when the LTM is received by the transceiver module and a second timestamp when the LTM is received by the transceiver module, the third performance measurement parameter includes a third count value when the LTR is issued by the transceiver module and a third timestamp when the LTR is issued by the transceiver module, and the fourth performance measurement parameter includes a fourth count value when the LTR is received by the first device and a fourth timestamp when the LTR is received by the first device.
According to a fourth aspect of the present application, a first device comprises a transceiver module and a processing module, wherein the transceiver module is configured to transmit a link tracking message LTM to a second device, and the LTM includes a first performance measurement parameter; receiving a Link Tracking Reply (LTR) sent by the second device, the LTR responsive to the LTM, the LTR comprising a second performance measurement parameter and a third performance measurement parameter; the processing module is configured to obtain a fourth performance measurement parameter, and obtain a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
On the basis of the fourth aspect, the first performance measurement parameter comprises a first count value when the transceiver module issues the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device issues the LTR, and the fourth performance measurement parameter comprises a fourth count value when the transceiver module receives the LTR; the obtaining, by the processing module, a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter includes: and the processing module acquires the packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value.
On the basis of the fourth aspect, the first performance measurement parameter comprises a first timestamp at which the LTM was sent by the transceiving module, the second performance measurement parameter comprises a second timestamp at which the LTM was received by the second device, the third performance measurement parameter comprises a third timestamp at which the LTR was issued by the second device, and the fourth performance measurement parameter comprises a fourth timestamp at which the LTR was received by the transceiving module; the processing module obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter: the processing module obtains the network delay between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
On the basis of the fourth aspect, the first performance measurement parameter comprises a first count value when the transceiver module issues the LTM and a first timestamp when the transceiver module transmits the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device issues the LTR and a third timestamp when the second device issues the LTR, and the fourth performance measurement parameter comprises a fourth count value when the transceiver module receives the LTR and a fourth timestamp when the transceiver module receives the LTR; the processing module obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter: the processing module acquires the packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value; the processing module obtains the network delay between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
According to a fifth aspect of the present application, a network system includes a first device and a second device, where the first device is the first device in the fourth aspect, and the second device is the second device in the third aspect.
According to a sixth aspect of the present application, a computer-readable storage medium is characterized by comprising program instructions that, when executed, perform the method of the first and second aspects.
In the above embodiment, the first device is located in a first network and the second device is located in a second network.
According to the method of the embodiment of the application, a first device can be used as a source end MEP for network performance detection, a second device can be used as a sink end MEP for network performance detection, the source end MEP sends an LTM to the sink end MEP, the LTM includes a first performance measurement parameter, the sink end MEP receives the LTM sent by the source end MEP and sends an LTR corresponding to the LTM to the source end MEP, the LTR includes a second performance measurement parameter and a third performance measurement parameter, the source end MEP obtains a fourth performance measurement parameter, and according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter, performance measurement parameters between the source end MEP and the sink end MEP are obtained, such as time delay, packet loss number and the like. According to the embodiment of the application, since the performance measurement parameters from the source MEP to the sink MEP are carried in the LTM and sent to the sink MEP, and according to the provisions of IEEE 802.1ag and ITU-T y.1731, the link trace message (LTM/LTR) can traverse different networks as long as the source MEP and the sink MEP are located in the same MD and have the same MD level. Therefore, according to the technical scheme of the embodiment of the application, when the network performance detection is realized, only the first device where the source end MEP is located and the second device where the destination end MEP is located need to be configured with the MEP and the ETHOAM, and the ETHOAM does not need to be respectively deployed in one or more networks from the source end MEP to the destination end MEP, so that the configuration complexity is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of a network system according to an embodiment of the present application;
FIGS. 2A-2C are schematic structural diagrams of an LTM according to embodiments of the present disclosure;
FIGS. 3A-3C are schematic structural diagrams of an LTR according to embodiments of the present disclosure;
fig. 4 is a schematic flowchart of a network performance measurement method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a first device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a second apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a first apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a second device according to an embodiment of the present application.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings.
The techniques described herein may be used in various communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile communications (GSM), Code Division Multiple Access (Code Division Multiple Access, CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA), Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency-Division Multiple Access (OFDMA) systems, FDMA (SC-FDMA) systems, General Packet Radio Service (GPRS, Radio) systems, Long Term transmission (Long Term Packet, Packet transmission (LTE) systems, single carrier network (LTE) systems, MSTP) network systems, and other such communication systems.
The OAM referred to herein may be multi-protocol label switching transport profile (MPLS-TP) OAM, MPLS OAM, ETHOAM, and other such OAM.
Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The Maintenance Entity (ME), the Maintenance Entity Group (MEG) Maintenance End Point (MEP), the maintenance intermediate node (MEG intermediate node, MIP), the Link Trace Message (LTM), the Link Trace Response (LTR), the Loss Measurement Message (LMM), the Loss Measurement Response (LMR), the Delay Measurement Message (DMM), the Delay Measurement Response (DMR) and all references ITU-T y.1731(05/2006) and IEEE 802.1ag and 802.1ah, when not defined specifically.
The present application relates to the terms:
operations, administration and maintenance (OAM): a set of network management functions that provide network fault indication, performance information and data, and diagnostic functions. Examples include ATM OAM [ ITU-T I-610] and IEEE Standard 802.3ah OAM.
Connection Fault Management (CFM): the method comprises the functions of detecting, verifying and isolating connection failure in the virtual bridging local area network. These functions may be used in a network operated by multiple independent organizations, each with limited management access capabilities to each other's devices.
Domain Service Access Point (DSAP): a member of a group of SAPs that can provide connectivity to systems outside the maintenance domain is within the maintenance domain. In a bridge, each DSAP is an instance of an Enhanced Internal Sublayer Service (EISS) or an Internal Sublayer Service (ISS).
Maintenance group end point (MEP): the MEP is an active managed CFM entity, associated with a particular DSAP of a service instance, that can generate and receive CFM frames and track any responses. It is the endpoint of a single MA and, for each other MEP in the same MA, an independent maintenance entity.
Maintenance group (MA): a set of MEPs, each of which is configured using the same maintenance group identification (MAID) and MD level. The MA may be considered a complete grid of maintenance entities in a set of such configured MEPs.
Maintenance group endpoint identifier (MEPID): an integer number that uniquely identifies a particular MEP within a given MA range.
Maintenance group identifier (maitnance association identifier, MAID): an identifier of the group is maintained, the MAID being unique within the domain of the randomly concatenated service instance to be protected by the CFP. MAID has two components: the domain name and short MA name are maintained.
Maintenance Domain (MD): which connects the network or part of the network whose failure is to be managed. The boundaries of the maintenance domain are defined by a set of DSAPs, each of which becomes a connection point to a service instance.
Maintenance domain intermediate point (MIP): MIP is a CFM entity that may contain one or more MIP semi-functions (MHF).
Maintenance Domain Name (MDN): the identifier of a particular maintenance domain is unique within the domain of the randomly concatenated service instance that the CFM will protect.
Maintenance Entity (ME): a point-to-point relationship between two MEPs within a single MA.
Maintenance Point (MP): one MEP or MIP.
MD level (MD level): an integer within the field in the CFM frame is used to identify the MA to which the CFM message belongs, together with a virtual local area network identifier (VID) in a Virtual Local Area Network (VLAN) tag, and thereby determine the MP that is interested in the contents of the CFM frame and allows the CFM frame to pass through.
Link Trace Message (LTM): CFM frames are originated by MEPs and forwarded from MIP to MIP, each MIP generates one LTR until the LTM reaches its destination or a point where it cannot be forwarded any more.
Link Tracking Response (LTR): unicast CFM frames sent by MIP or MEP in response to receiving an LTM.
The technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, a network system includes a metropolitan area network 1, a metropolitan area network 2, and a backbone network, where the metropolitan area network 1, the metropolitan area network 2, and the backbone network are connected by a User Network Interface (UNI) through communication. Metropolitan area network 1 includes network devices a1 and a2, the backbone network includes network devices B1 and B2, and metropolitan area network 2 includes network devices C1 and C2. CE1 communicates with CE2 via network devices a1, a2, B1, B2, C1, and C2, in turn. Network devices a1, a2, B1, B2, C1, and C2 are used to carry and forward traffic, and network devices a1, a2, B1, B2, C1, and C2 may be Packet Transport Network (PTN) devices. The CE1 and the CE2 are third-party devices, and perform service connectivity, packet loss and delay detection by configuring LT. Alternatively, the CE may be a router or a switch or a host.
In this network system, the network device a1 is configured with a maintenance association end point (MEP): MEP1, network device C2 has MEP2 configured thereon. MEP1 and MEP2 are located in the same Maintenance Domain (MD). For packets transmitted from CE1 via A1, A2, B1, B2, C1, and C2 to CE2, MEP1 is the source MEP and MEP2 is the sink MEP. Maintenance alliance internal nodes (MIPs) may also be configured on other devices between MEP1 and MEP 2. Alternatively, the MEP and the MIP may be configured on a port where the UNI of the corresponding device is located, for example, the MEP1 may be configured on a UNI port of the network device a1, and the MEP2 may be configured on a UNI port of the network device C2. When initiating a Link Trace (LT) on a source MEP, such as MEP1 of fig. 1, MEP1 issues a Link Trace Message (LTM) to sink MEP2, sink MEP2 receives the LTM, returns a Link Trace Reply (LTR) to source MEP1, and MEP1 receives the LTR returned by MEP2 in response to the LTM, determining that the traffic link connectivity of MEP1 to MEP2 is normal. If MIPs are configured on other network devices (such as network devices B1, B2 of FIG. 1) between the source MEP1 and the sink MEP2, each MIP that receives the LTM sent by the source MEP1 returns an LTR in response to the LTM to the source MEP1 to confirm that the traffic link connectivity from MEP1 to the MIP is normal, and the MIP continues to forward the LTM sent by MEP1 to downstream devices on the link from MEP1 to MEP2 until the sink MEP 2. Of course, these MIPs are located in the same MD and have the same MD level as MEP1, MEP 2.
OAM functions as specified by ITU-T y.1731 include performance management in addition to fault management, performance management parameters including frame loss, frame delay and jitter. The frame loss refers to a difference between a traffic frame sent by the ingress device and a traffic frame received by the egress device. The frame delay refers to loop delay, and a loopback mode is used at a destination node, which is defined as a time difference between the transmission of a frame and the reception of a loopback frame. The frame delay jitter refers to the delay variation, that is, two loop-back messages are sent within a period of time interval, the frame delay is calculated respectively, and the absolute difference between the two frame delays is taken.
The ETHOAM comprises fault management and performance management, wherein the fault management mainly comprises a connectivity detection function, a loopback function, an LT function, an alarm indication function, a far-end fault alarm and test function and the like; the performance management includes management of frame loss, frame delay and delay jitter, and the ETHOAM mechanism is collectively defined by IEEE 802.3ah, IEEE 802.1ag and ITU-T Y.1731.
Referring to fig. 4, an embodiment of the present application provides a method for measuring network performance, which may be used to measure the performance of a network, where the network performance parameter includes one or more of packet loss rate, delay, and jitter. The method may be applied to the network of fig. 1. The method comprises the following steps:
s10, the first device sends the LTM to the second device, the LTM including the first performance measurement parameter.
S12, the second device receives the LTM and returns LTR corresponding to the LTM to the first device, wherein the LTR comprises a second performance measurement parameter and a third performance measurement parameter.
And S14, the first device receives the LTR, acquires a fourth performance measurement parameter, and acquires the performance measurement parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter.
Specifically, the first device may be a network device a1 in the metro network 1 of fig. 1, which communicates with the CE1, the network device a1 may be a PE device in the metro network 1, and the CE1 accesses the metro network 1 through a 1. The second device may be a network device C2 in the metro network 2 of fig. 1, which communicates with the CE2, the network device C2 may be a PE device, and the CE2 accesses the metro network 2 through C2. The CE1 communicates with the CE2 via the metropolitan network 1 and the metropolitan network 2. MEPs are deployed on the first device and the second device, such as a source MEP deployed on network device a 1. The terminating MEP is deployed on network device C2. When an MEP is deployed on a first device, the MAC address of the first device may be the MAC address of the MEP deployed on the first device. When an MEP is deployed on a second device, the MAC address of the second device may be the MAC address of the MEP deployed on the second device.
The source MEP multicasts the LTM in the MD where the source MEP is located, the MIP in the MD receives the LTM, the MIP is determined to be located on a channel from the source MEP to the sink MEP, the MIP sends the LTR corresponding to the LTM to the source MEP, and the LTR sent by the MIP to the source MEP comprises the MAC address of the source MEP. The MIP forwards the LTM in the direction from the source MEP to the sink MEP.
In one embodiment, the LTM may also include a Media Access Control (MAC) address of the first device and a MAC address of the second device. The LTR may also include a MAC address of the first device and a MAC address of a second device.
In one embodiment, the first performance measurement parameter includes one or more of a timestamp TxTimeStampf (hereinafter referred to as a "first timestamp") when the source MEP sends an LTM and a source count TxFCf (hereinafter referred to as a "first count value") when the source MEP sends the LTM.
In one embodiment, the first performance measurement parameter may be carried in a type-length-value (TLV) of the LTM. When the first performance measurement parameter includes the first count value, as shown in fig. 2A, the LTM includes a first TLV, and the first count value is carried in the first TLV. When the first performance measurement parameter includes the first timestamp, as shown in fig. 2B, the LTM includes a second TLV, and the first timestamp is carried in the first TLV. When the first performance measurement parameter includes the first count value and the first timestamp, as shown in fig. 2C, the LTM includes the first TLV and the second TLV, the first count value is carried in the first TLV, and the first timestamp is carried in the second TLV.
In one embodiment, the first TLV in fig. 2A and 2C may further include:
reserved for RxFCf in LTR: occupy 4 bytes, representing the value of RxFCf of the sink counter at the LTM frame reception time (hereinafter referred to as "second count value"), this Reserved for RxFCf in LTR Reserved for LTR;
reserved for TxFCb in LTR: occupying bytes, representing the TxFCb value of the counter of the sink MEP at the time LTR is sent (hereinafter referred to as "third count value"), this Reserved for TxFCb in LTR Reserved for LTR.
In one embodiment, the second TLV in fig. 2B and 2C may further include:
reserved for RxTimeStampf in LTR: the sink MEP receives a timestamp (reserved for LTRs) of the LTM (hereinafter referred to as "second timestamp");
reserved for TxTimeStampb in LTR: the sink MEP sends a timestamp (reserved for LTR) of the LMR (hereinafter referred to as "third timestamp").
In one embodiment, if the first performance measurement parameter comprises the first count value, the second performance measurement parameter comprises a second count value, the third performance measurement parameter comprises a third count value, and the fourth performance measurement parameter comprises a source MEP counter value RxFCb (hereinafter referred to as "fourth count value") when the source MEP receives the LTR. Optionally, the LTR may further include the first count value. As shown in fig. 3A, the LTR includes a third TLV, and the second count value and the third count value may be carried in the third TLV.
If the first performance measurement parameter includes the first timestamp, the second performance measurement parameter includes the second timestamp, the third performance measurement parameter includes the third timestamp, and the fourth performance measurement parameter includes a timestamp rxtimestamp (hereinafter referred to as "fourth timestamp") when the source MEP receives the LTR. Optionally, the LTR may further include the first timestamp. As shown in fig. 3B, the LTR includes a fourth TLV, and the second timestamp and the third timestamp may be carried in the fourth TLV.
If the first performance measurement parameter includes the first count value and the first timestamp, a second performance measurement parameter includes the second count value and a second timestamp, and a third performance measurement parameter includes a third count value and a third timestamp. As shown in fig. 3C, the LTR includes a third TLV in which the first count value and the first timestamp are carried and a fourth TLV in which the third count value and the third timestamp are carried, and the fourth performance measurement parameter includes the fourth count value and the fourth timestamp. Optionally, the LTR may further include the first count value and the first timestamp.
In an embodiment, the first device obtains, according to the first count value, the second count value, the third count value, and the fourth count value, a packet loss number between the first device and the second device.
In one embodiment, the first device obtains the network latency between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
The packet loss statistical principle is as follows: whenever a valid LTM frame is received by the second device or the sink MEP on the second device, the sink MEP on the second device or the second device generates an LTR and transmits it to the first device or the source MEP on the first device, the LTR frame carrying the following information:
TxFCf- -the value of the source-side counter value TxFCl at the transmission time of the LMM frame (i.e. "first count value")
RxFCf- -the value of the sink counter at the moment when the LMM frame is received (i.e., "second count")
TxFCb- -the TxFCb value of the sink counter at the moment of LMR frame transmission (i.e. "third count value")
After receiving the LMR frame, the Egress node calculates a packet loss value by using the following formula:
the TxFCf, RxFCf, and TxFCb values received in the LTR and the value of the RxFCl value of the local counter at the time of reception of this LTR frame are denoted as TxFCf [ tc ], RxFCf [ tc ], TxFCb [ tc ], and RxFCl [ tc ], where tc is the time of reception of the current response frame.
The TxFCf, RxFCf and TxFCb values in the LTR at the previous instant and the RxFCl value of the local counter at the previous LTR reception instant are denoted TxFCf tp, RxFCf tp, TxFCb tp and RxFCl tp, where tp is the instant at which the previous response frame was received.
The packet loss statistics are as follows:
lost packet (far-end) | TxFCf [ tc ] -TxFCf [ tp ] | - | RxFCf [ tc ] -RxFCf [ tp ]
Lost (home terminal)) | TxFCb [ tc ] -TxFCb [ tp ] | - | RxFCl [ tc ] -RxFCl [ tp ] <' > (t |)
According to the method of the embodiment of the application, a source MEP is configured on a first device in a first network, a source MEP is configured on a second device in a second network, the source MEP sends an LTM to a sink MEP configured on the second network device, the LTM includes an MAC address of the source MEP, an MAC address of the sink MEP and a first performance measurement parameter, the sink MEP receives the LTM sent by the source MEP and sends an LTR corresponding to the LTM to the source MEP, the LTR includes a second performance measurement parameter and a third performance measurement parameter, the source MEP obtains a fourth performance measurement parameter, and according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter, performance measurement parameters between the source MEP and the sink MEP, such as time delay, packet loss and the like, are obtained. According to the embodiment of the application, since the performance measurement parameters from the source MEP to the sink MEP are carried in the LTM and sent to the sink MEP, and according to the provisions of IEEE 802.1ag and ITU-T y.1731, the link trace message (LTM/LTR) can traverse different networks as long as the source MEP and the sink MEP are located in the same MD and have the same MD level. Therefore, according to the technical scheme of the embodiment of the application, only the first network device where the source MEP is located and the second network device where the sink MEP is located need to be configured with the MEP and the ETHOAM, and the ETHOAM does not need to be respectively deployed in one or more networks from the source MEP to the sink MEP, so that the configuration complexity is greatly reduced.
The standard LT message can only detect the connectivity of the service, the standard LM and DM messages can only detect the packet loss and the time delay of the service respectively, and the LTM/LTR messages bear the packet receiving and transmitting information and the time stamp by expanding the TLV in the LT message LTM/LTR, so that the LT can not only detect the connectivity of the service, but also carry out the statistics of the packet loss and the time delay, namely, the service is monitored in multiple aspects. The time delay/packet loss performance statistics of each section of the service path is finished end to end at one time, and the operation and maintenance efficiency is improved.
As shown in fig. 5, a first network device 500 is deployed with an active end MEP, where the first network device 500 may be the network device a1 shown in fig. 1 or a first device of the foregoing method embodiment, and may implement the function of the first device in the foregoing method. The first device includes: 502 a transceiver module and a processing module 504, wherein,
the transceiver module 502 is configured to send a link tracking message LTM to the second device, where the LTM includes a first performance measurement parameter; receiving a Link Tracking Reply (LTR) sent by the second device, the LTR responsive to the LTM, the LTR comprising a second performance measurement parameter and a third performance measurement parameter;
the processing module 502 is configured to obtain a fourth performance measurement parameter, and obtain a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
In one embodiment, the first performance measurement parameter comprises a first count value when the transceiver module 502 issues the LTM, the second performance measurement parameter comprises a second count value when the LTM is received by the second device, the third performance measurement parameter comprises a third count value when the LTR is issued by the second device, and the fourth performance measurement parameter comprises a fourth count value when the LTR is received by the transceiver module 502; the processing module 504 obtains a packet loss number between the first device and the second device according to the first count value, the second count value, the third count value, and the fourth count value.
In one embodiment, the first performance measurement parameter comprises a first timestamp of when the transceiver module 502 sent the LTM, the second performance measurement parameter comprises a second timestamp of when the LTM was received by the second device, the third performance measurement parameter comprises a third timestamp of when the LTR was emitted by the second device, and the fourth performance measurement parameter comprises a fourth timestamp of when the LTR was received by the transceiver module 502; the processing module 504 obtains the network delay between the first device and the second device according to the following formula: i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
In one embodiment, the first performance measurement parameter comprises a first count value when the transceiver module 502 issues the LTM and a first timestamp when the transceiver module 502 transmits the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device issues the LTR and a third timestamp when the second device issues the LTR, and the fourth performance measurement parameter comprises a fourth count value when the transceiver module receives the LTR and a fourth timestamp when the transceiver module 502 receives the LTR; the processing module 504 obtains a packet loss number between the first device and the second device according to the first count value, the second count value, the third count value, and a fourth count value; the processing module 504 obtains the network delay between the first device and the second device according to the following formula: the fourth timestamp-the first timestamp-the third timestamp-the second timestamp |.
As shown in fig. 6, a network device 600 is deployed with a host MEP as a second device, and the network device 600 may be the network device C2 shown in fig. 1 or the second device of the foregoing method embodiment, and may be used in cooperation with the network device shown in fig. 5, so as to implement the function of the second device in the foregoing method. The network device 600 includes a transceiver module 602 and a processing module 604, where the transceiver module 602 is configured to receive an LTM sent by a first network device, where the LTM includes a first performance measurement parameter. The processing module 604 is configured to obtain a second performance measurement parameter and a third performance measurement parameter according to the LTM, and the transceiver module 604 is configured to send an LTR corresponding to the LTM to the first device, where the LTR includes the second performance measurement parameter and the third performance measurement parameter, so that the first device obtains a fourth performance measurement parameter, and obtains a network performance measurement parameter between the first device and the network device 600 according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
Fig. 7 is a schematic structural diagram of a network device 700 according to an embodiment of the present application. The network device 700 may be the same apparatus as the network device 500 in the embodiment corresponding to fig. 5, may also be the device a1 in fig. 1, or the first device in the foregoing method embodiment, and may implement the function of the first device in the foregoing method. The network device 700 may perform the steps performed by the first device in the embodiment corresponding to fig. 4. The network device 700 provided by this embodiment includes: a processor 701, a memory 702, and a communication interface 703. The processor 701, the memory 702 and the communication interface 703 are connected by a communication bus 704. The memory 702 is used to store programs or instructions. The processor 701 executes the method steps executed by the first device in the embodiment corresponding to fig. 4 according to the program or the instructions read from the memory 702.
Fig. 8 is a schematic structural diagram of a network device 800 according to an embodiment of the present application. The network device 800 may be the same apparatus as the network device 600 in the embodiment corresponding to fig. 5, or may be the device C2 in fig. 1, and may implement the function of the second device in the above method. The network device 800 may perform the steps performed by the second device in the embodiment corresponding to fig. 4. The network device 800 provided in this embodiment includes: a processor 801, a memory 802, and a communication interface 803. The processor 801, the memory 802 and the communication interface 803 are connected by a communication bus 804. The memory 802 is used to store programs or instructions. The processor 801 executes the method steps performed by the second device in the embodiment corresponding to fig. 4 according to the program or the instructions read from the memory 802.
The embodiment of the application provides a computer readable storage medium. The computer-readable storage medium stores a computer program. The computer program, when executed by a processor or a computer, may cause the processor or the computer to perform the method illustrated in fig. 4.
An embodiment of the present application further provides a network system, where the network system includes a first device and a second device, where the first device may be the network device described in the embodiment corresponding to fig. 5 or fig. 7, and the second device may be the network device described in the embodiment corresponding to fig. 6 or fig. 8. The network system may also be the network shown in fig. 1, where the first device may be network device a1 of fig. 1 and the second device may be network device C2 of fig. 1.
Reference to "first" and "second" in the embodiments of the present application does not indicate a sequential order. "first" and "second" in the embodiments of the present application denote different devices and information.
Various modifications and alterations to the embodiments provided herein will be apparent to those skilled in the art. The processor in the above embodiments may be a microprocessor or the processor may be any conventional processor. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. When implemented in software, the code implementing the above described functionality may be stored on a computer readable medium. Computer readable media includes computer storage media. A storage media may be any available media that can be accessed by a computer. Take this as an example but not limiting: the computer-readable medium can be a Random Access Memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a compact disk-read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program code in the form of instructions or data structures and that can be accessed by a computer. The computer readable medium may be a Compact Disc (CD), a laser disc, an optical disc, a Digital Video Disc (DVD), a floppy disc or a blu-ray disc.

Claims (22)

1. A method for measuring network performance is characterized in that a source end maintenance alliance edge end MEP and an Ethernet operation, maintenance and management ETHOAM are configured on a first device, a host end MEP and an ETHOAM are configured on a second device, and the method comprises the following steps:
the first device sends a Link Trace Message (LTM) to the second device, wherein the LTM comprises a first performance measurement parameter;
the first device receiving a link tracking reply, LTR, sent by the second device, the LTR responsive to the LTM, the LTR including a second performance measurement parameter and a third performance measurement parameter;
the first device obtains a fourth performance measurement parameter, and obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter.
2. The method of claim 1, wherein the first performance measurement parameter comprises a first count value when the first device emits the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device emits the LTR, and the fourth performance measurement parameter comprises a fourth count value when the first device receives the LTR;
and the first equipment acquires the packet loss number between the first equipment and the second equipment according to the first count value, the second count value, the third count value and the fourth count value.
3. The method of claim 1, wherein the first performance measurement parameter comprises a first timestamp for the LTM sent by the first device, the second performance measurement parameter comprises a second timestamp for when the LTM was received by the second device, the third performance measurement parameter comprises a third timestamp for when the LTR was issued by the second device, the fourth performance measurement parameter comprises a fourth timestamp for when the LTR was received by the first device; the first device obtains the network delay between the first device and the second device according to the following formula:
i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
4. The method of claim 1, wherein the first performance measurement parameters comprise a first count value when the first device sends the LTM and a first timestamp when the first device sends the LTM, the second performance measurement parameters comprise a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameters comprise a third count value when the second device sends the LTR and a third timestamp when the second device sends the LTR, the fourth performance measurement parameters comprise a fourth count value when the first device receives the LTR and a fourth timestamp when the first device receives the LTR;
the first device obtains a packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value;
the first device obtains the network delay between the first device and the second device according to the following formula:
i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
5. The method of any of claims 1-4, wherein the first device is located in a first network and the second device is located in a second network.
6. A method of measuring network performance, comprising:
the method comprises the steps that a Link Tracking Message (LTM) sent by a first device is received by a second device, wherein the LTM comprises a first performance measurement parameter;
the second equipment obtains a second performance measurement parameter and a third performance measurement parameter according to the LTM;
the second device returns a link tracking reply, LTR, to the first device, the LTR responsive to the LTM, the LTR including the second performance measurement parameter and the third performance measurement parameter; the LTR is configured to enable the first device to obtain a fourth performance measurement parameter when receiving the LTR, and obtain a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
7. The method of claim 6, wherein the first performance measurement parameter comprises a first count value when the first device emits the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device emits the LTR, and the fourth performance measurement parameter comprises a fourth count value when the first device receives the LTR;
and the first equipment acquires the packet loss number between the first equipment and the second equipment according to the first count value, the second count value, the third count value and the fourth count value.
8. The method of claim 6, wherein the first performance measurement parameter comprises a first timestamp for the first device to send the LTM, the second performance measurement parameter comprises a second timestamp for the second device when the LTM is received, the third performance measurement parameter comprises a third timestamp for the second device when the LTR is issued, the fourth performance measurement parameter comprises a fourth timestamp for the first device when the LTR is received; the first device obtains the network delay between the first device and the second device according to the following formula:
i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
9. The method of claim 6, wherein the first performance measurement parameters comprise a first count value when the first device sends the LTM and a first timestamp when the first device sends the LTM, the second performance measurement parameters comprise a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameters comprise a third count value when the second device sends the LTR and a third timestamp when the second device sends the LTR, the fourth performance measurement parameters comprise a fourth count value when the first device receives the LTR and a fourth timestamp when the first device receives the LTR;
the first device obtains a packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value;
the first device obtains the network delay between the first device and the second device according to the following formula:
the fourth timestamp-the first timestamp-the third timestamp-the second timestamp |.
10. The method of any of claims 6-9, wherein the first device is located in a first network and the second device is located in a second network.
11. A second device is characterized in that the second device comprises a transceiver module and a processing module, the first device is provided with a source end maintenance alliance edge end MEP and an Ethernet operation, maintenance and management ETHOAM, the second device is provided with a host end MEP and an ETHOAM, wherein,
the transceiver module is configured to receive a link tracking message LTM sent by a first device, where the LTM includes a first performance measurement parameter;
the processing module is used for obtaining a second performance measurement parameter and a third performance measurement parameter according to the LTM,
the transceiver module is configured to send a link tracking response LTR corresponding to the LTM to the first device, where the LTR includes the second performance measurement parameter and the third performance measurement parameter, so that the first device obtains a fourth performance measurement parameter, and obtains a network performance measurement parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
12. The second device of claim 11, wherein the first performance measurement parameter comprises a first count value when the first device emits the LTM, the second performance measurement parameter comprises a second count value when the transceiver module receives the LTM, the third performance measurement parameter comprises a third count value when the transceiver module emits the LTR, and the fourth performance measurement parameter comprises a fourth count value when the first device receives the LTR.
13. The second device of claim 11, wherein the first performance measurement parameter comprises a first timestamp that the first device sent the LTM, the second performance measurement parameter comprises a second timestamp that the transceiver module received the LTM, the third performance measurement parameter comprises a third timestamp that the transceiver module issued the LTR, and the fourth performance measurement parameter comprises a fourth timestamp that the first device received the LTR.
14. The second device of claim 11, wherein the first performance measurement parameters comprise a first count value when the first device sends the LTM and a first timestamp when the first device sends the LTM, the second performance measurement parameters comprise a second count value when the transceiver module receives the LTM and a second timestamp when the transceiver module receives the LTM, the third performance measurement parameters comprise a third count value when the transceiver module sends the LTR and a third timestamp when the transceiver module sends the LTR, and the fourth performance measurement parameters comprise a fourth count value when the first device receives the LTR and a fourth timestamp when the first device receives the LTR.
15. The second device of any of claims 11-14, wherein the second device is located in a first network and the first device is located in a second network.
16. A first device is characterized in that the first device comprises a transceiver module and a processing module, the first device is provided with a source end maintenance alliance edge end MEP and an Ethernet operation, maintenance and management ETHOAM, the second device is provided with a host end MEP and an ETHOAM, wherein,
the transceiver module is configured to send a link trace message LTM to the second device, where the LTM includes a first performance measurement parameter; receiving a link tracking reply LTR sent by the second device, the LTR responsive to the LTM, the LTR including a second performance measurement parameter and a third performance measurement parameter;
the processing module is configured to obtain a fourth performance measurement parameter, and obtain a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter.
17. The first device of claim 16, wherein the first performance measurement parameter comprises a first count value when the transceiver module issues the LTM, the second performance measurement parameter comprises a second count value when the second device receives the LTM, the third performance measurement parameter comprises a third count value when the second device issues the LTR, and the fourth performance measurement parameter comprises a fourth count value when the transceiver module receives the LTR;
the obtaining, by the processing module, a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter, and the fourth performance measurement parameter includes: and the processing module acquires the packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value.
18. The first device of claim 16, wherein the first performance measurement parameter comprises a first timestamp of when the transceiver module sent the LTM, the second performance measurement parameter comprises a second timestamp of when the LTM was received by the second device, the third performance measurement parameter comprises a third timestamp of when the LTR was issued by the second device, the fourth performance measurement parameter comprises a fourth timestamp of when the LTR was received by the transceiver module;
the processing module obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter:
the processing module obtains the network delay between the first device and the second device according to the following formula:
the fourth timestamp-the first timestamp-the third timestamp-the second timestamp |.
19. The first device of claim 16, wherein the first performance measurement parameters comprise a first count value when the transceiver module issues the LTM and a first timestamp when the transceiver module transmits the LTM, the second performance measurement parameters comprise a second count value when the second device receives the LTM and a second timestamp when the second device receives the LTM, the third performance measurement parameters comprise a third count value when the second device issues the LTR and a third timestamp when the second device issues the LTR, the fourth performance measurement parameters comprise a fourth count value when the transceiver module receives the LTR and a fourth timestamp when the transceiver module receives the LTR;
the processing module obtains a network performance parameter between the first device and the second device according to the first performance measurement parameter, the second performance measurement parameter, the third performance measurement parameter and the fourth performance measurement parameter:
the processing module acquires the packet loss number between the first device and the second device according to the first count value, the second count value, the third count value and the fourth count value;
the processing module obtains the network delay between the first device and the second device according to the following formula:
i fourth timestamp-first timestamp-i third timestamp-second timestamp i.
20. The first device of any of claims 16-19, wherein the first device is located in a first network and the second device is located in a second network.
21. A network system comprising a first device according to any one of claims 16 to 20 and a second device according to any one of claims 11 to 15.
22. A computer-readable storage medium comprising program instructions that, when executed, perform the method of any of claims 1-10.
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