CN112291148A - Method for detecting BFD forwarding path quality through BFD ping - Google Patents
Method for detecting BFD forwarding path quality through BFD ping Download PDFInfo
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- CN112291148A CN112291148A CN202011147773.4A CN202011147773A CN112291148A CN 112291148 A CN112291148 A CN 112291148A CN 202011147773 A CN202011147773 A CN 202011147773A CN 112291148 A CN112291148 A CN 112291148A
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- bidirectional forwarding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/252—Store and forward routing
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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
- H04L45/12—Shortest path evaluation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/825—Involving tunnels, e.g. MPLS
Abstract
The application discloses a method for detecting BFD forwarding path quality through BFD ping, which comprises the following steps: establishing a routing protocol between sending end routing equipment and receiving end routing equipment; linkage routing protocol and bidirectional forwarding detection; creating and packaging a bidirectional forwarding detection ping message; sending the encapsulated bidirectional forwarding detection ping message to the receiving end routing equipment by the sending end routing equipment according to a bidirectional forwarding detection message sending path; the receiving end routing equipment identifies and analyzes the received encapsulated bidirectional forwarding detection ping message, and displays the analyzed data; and judging the BFD forwarding path quality according to the data obtained by analysis. According to the method for detecting the BFD forwarding path quality through the BFD ping, the path quality and the equipment state are judged in advance before the BFD detection is deployed through the BFD ping function, reference is provided for deployed BFD parameters according to a detection result, and meanwhile network deterioration caused by improper deployment of BFD is avoided.
Description
Technical Field
The application relates to the technical field of communication, in particular to a method for detecting BFD forwarding path quality through BFD ping.
Background
The BFD (Bidirectional Forwarding Detection) technology is used for rapidly detecting communication faults between systems and notifying an upper layer application when a fault occurs. BFD is a time-sensitive detection mechanism, and any link delay, packet loss of forwarding engine, and untimely CPU processing may cause BFD failure, causing network switching, and frequent oscillation may cause deterioration of device and network quality. If high-precision BFD detection is deployed without knowing the network quality and the condition of a forwarding engine, repeated oscillation switching of the network can be caused. Before deployment, detection of the BFD path to be deployed is necessary. According to the detection result, the problems existing in the network are found in advance, reference can be provided for BFD detection parameters to be deployed, and the deployment risk is reduced.
Ping (Packet Internet Groper, Internet Packet explorer), a program for testing the quality of network connections. Ping is a service command working in the application layer of the TCP/IP network architecture, and mainly sends an ICMP (Internet Control Message Protocol) Echo request Message to a specific destination host, so as to test whether a destination station is reachable and know the relevant status. Currently, functions such as IP ping, MPLS (Multi-Protocol Label Switching) ping, pw ping and the like are related to a Protocol, and general detection cannot be provided. And the detected link is not consistent with the actual BFD path, so that the quality condition of the BFD forwarding path cannot be accurately reflected.
Disclosure of Invention
The application aims to provide a method for detecting the quality of a BFD forwarding path through BFD ping. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of an embodiment of the present application, there is provided a method for detecting BFD forwarding path quality through BFD ping, including:
establishing a routing protocol between sending end routing equipment and receiving end routing equipment;
linking the routing protocol with bidirectional forwarding detection;
creating and packaging a bidirectional forwarding detection ping message;
sending the encapsulated bidirectional forwarding detection ping message to the receiving end routing equipment by the sending end routing equipment according to a bidirectional forwarding detection message sending path;
the receiving end routing equipment identifies and analyzes the received encapsulated bidirectional forwarding detection ping message, and displays the analyzed data;
and judging the BFD forwarding path quality according to the data obtained by analysis.
Further, the creating and encapsulating the bidirectional forwarding detection ping message comprises:
and creating a bidirectional forwarding detection ping message, adding extension information and a message identifier into the bidirectional forwarding detection ping message, and packaging the message.
Further, the receiving end routing device identifies and analyzes the received encapsulated bidirectional forwarding detection ping message, including:
and the receiving end routing equipment identifies the received encapsulated bidirectional forwarding detection ping message according to the message identification and analyzes the extended information in the encapsulated bidirectional forwarding detection ping message.
Further, the extension information includes: current packet sending time, ping packet sequence number, head end packet sending total number and final packet end mark.
Further, the parsing the extended information in the encapsulated bidirectional forwarding detection ping message includes:
counting the total number of the sent data packets and the total number of the received data packets;
calculating the sending interval of two adjacent data packets according to the current packet sending time in the bidirectional forwarding detection ping message;
and calculating the receiving interval of two adjacent data packets according to the time for receiving the data packets.
Further, the data obtained by analyzing includes: the number of data packet transmissions, the number of data packet receptions, the packet loss rate, the maximum transmission interval, and the maximum reception interval.
Further, the routing protocol is an open shortest path first protocol, a label switched path protocol or an MPLS TE protocol.
According to another aspect of embodiments of the present application, there is provided an apparatus for detecting BFD forwarding path quality through BFD ping, including:
the system comprises a creating module, a sending end routing device and a receiving end routing device, wherein the creating module is used for creating a routing protocol between the sending end routing device and the receiving end routing device;
the linkage module is used for linking the routing protocol with bidirectional forwarding detection;
the encapsulation module is used for creating and encapsulating the bidirectional forwarding detection ping message;
a sending module, configured to send, by the sending-end routing device, the encapsulated bidirectional forwarding detection ping packet to the receiving-end routing device according to a bidirectional forwarding detection packet sending path;
the analysis module is used for the receiving end routing equipment to identify and analyze the received encapsulated bidirectional forwarding detection ping message and display the analyzed data;
and the quality judgment module is used for judging the BFD forwarding path quality according to the data obtained by analysis.
According to another aspect of embodiments of the present application, there is provided an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the above-described method for detecting BFD forwarding path quality via BFD ping.
According to another aspect of embodiments of the present application, there is provided a computer-readable storage medium having stored thereon a computer program, which is executed by a processor to implement the above-mentioned method for BFD forwarding path quality detection via BFD ping.
The technical scheme provided by one aspect of the embodiment of the application can have the following beneficial effects:
according to the method for detecting the BFD forwarding path quality through the BFD ping, the path quality and the equipment state are judged in advance before the BFD detection is deployed through the BFD ping function, reference is provided for deployed BFD parameters according to a detection result, network deterioration caused by improper deployment of BFD is avoided, the method is irrelevant to a protocol, a sending path is completely consistent with a BFD message sending path, and the quality condition of the BFD forwarding path can be accurately reflected.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the application, or may be learned by the practice of the embodiments. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 illustrates a flow diagram of a method of detecting BFD forwarding path quality via BFD ping of an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating the establishment of a routing protocol between router A and router B;
fig. 3 shows the contents of a bidirectional forwarding detection ping message;
fig. 4 shows a flow chart for parsing the extended information in the encapsulated bidirectional forwarding detection ping message;
fig. 5 shows a block diagram of an apparatus for detecting BFD forwarding path quality via BFD ping according to another embodiment of the present application;
FIG. 6 shows a block diagram of the structure of the parsing module;
FIG. 7 shows a block diagram of the second module;
fig. 8 shows a block diagram of an electronic device according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1, one embodiment of the present application provides a method for detecting BFD forwarding path quality through BFD ping, comprising:
s10, establishing a routing protocol between the sending end routing device and the receiving end routing device.
In some embodiments, the routing protocol may be an open shortest path first protocol, a label switched path protocol, or an MPLS TE protocol.
Specifically, taking the OSPF protocol as an example, as shown in fig. 2, the OSPF protocol is established between router a and router B. The router A belongs to the routing equipment of the sending end, and the router B belongs to the routing equipment of the receiving end.
The Open Shortest Path First (OSPF) Protocol is an Interior Gateway Protocol (IGP) Protocol, is used for routing decision in a single Autonomous System (AS), and is an implementation of a link state routing Protocol.
The Label Switching Path (LSP) protocol is a packet forwarding Path established in MPLS using the MPLS protocol, and is composed of a series of Label packet source LSRs (Label forwarding routers) and destination LSRs, and links therebetween.
The MPLS TE protocol belongs to the MPLS-based traffic engineering technology protocol.
And S20, linking the routing protocol with bidirectional forwarding detection.
Specifically, after the OSPF protocol is established between router a and router B, the configuration command is linked bfd, and then the ping key is added:
ospf bfd enable ping[-c num][-t time]。
optional parameters: -number of packets of ping;
-frequency of t ping packets.
And S30, creating and packaging the bidirectional forwarding detection ping message.
In some embodiments, step S30, creating and encapsulating the bidirectional forwarding detection ping message includes:
and creating a bidirectional forwarding detection ping message, adding extension information and a message identifier into the bidirectional forwarding detection ping message, and packaging the message. The contents of the bidirectional forwarding detection ping message are shown in fig. 3.
Specifically, after the configuration command is enabled, the messages your resolver and my resolver are set to 0 xfffffffff according to formal BFD message encapsulation to identify the BFD ping message.
Adding extension information: current time, Sequence num, E-tag, Total num.
Current time: the current packet sending time is accurate to ms;
sequence num: ping packet sequence number, starting from 1
Total num: total number of head end packets
E, marking: and whether the last packet end mark is used for the receiving end statistics.
And S40, sending the encapsulated bidirectional forwarding detection ping message to the receiving end routing equipment by the sending end routing equipment according to the bidirectional forwarding detection message sending path.
Specifically, the BFD ping message is sent according to a formal BFD message sending path, and a path which is passed through by the BFD ping message is completely consistent with a path which is passed through by the formal BFD message.
And S50, the receiving end routing equipment identifies and analyzes the received encapsulated bidirectional forwarding detection ping message, and displays the analyzed data.
In some embodiments, the S50, the receiving-end routing device identifying and parsing the received encapsulated bidirectional forwarding detection ping message, includes:
and the receiving end routing equipment identifies the received encapsulated bidirectional forwarding detection ping message according to the message identification and analyzes the extended information in the encapsulated bidirectional forwarding detection ping message.
In some embodiments, the extension information includes: current packet sending time, ping packet sequence number, head end packet sending total number and final packet end mark.
For example, setting the fields your resolver and my resolver as identifiers, and recognizing the BFD ping message according to the identifiers in the BFD ping message, namely the fields your resolver and my resolver.
In some embodiments, as shown in fig. 4, parsing the extended information in the encapsulated bidirectional forwarding detection ping message includes:
and S501, counting the total number of the sent data packets and the total number of the received data packets.
Specifically, the total number of transmitted data packets and the total number of received data packets are recorded separately.
S502, calculating the sending interval of two adjacent data packets according to the current packet sending time in the bidirectional forwarding detection ping message.
Specifically, according to the current packet sending time of each data packet stored in the bidirectional forwarding detection ping message, for each two adjacent data packets, the time when the last data packet is sent is subtracted from the time when the last data packet is sent, so that the sending time interval of the two adjacent data packets is obtained, and the accuracy is ms.
S503, calculating the receiving interval of two adjacent data packets according to the time for receiving the data packets.
In some embodiments, the parsed data comprises: the number of data packet transmissions, the number of data packet receptions, the packet loss rate, the maximum transmission interval, and the maximum reception interval.
Specifically, the analyzed data is displayed, for example:
display bfd ping statistic info
Total:5packet(s)transmitted,5packet(s)received,0.0％packet loss；
MaxTxinterval:10ms；
MaxRxinterval:10ms。
namely, it is
In total, the number of the transmitted data packets is 5, the number of the received data packets is 5, and the packet loss rate is 0.0 percent;
the maximum sending time interval is 10 ms;
the maximum receiving time interval is 10 ms.
And S60, judging the BFD forwarding path quality according to the analyzed data.
In some embodiments, according to a preset level threshold interval and a corresponding quality level, the analyzed data is compared with the level threshold interval, and then a corresponding quality level is obtained, that is, a level of the BFD forwarding path quality is obtained.
For example, four quality levels of good, medium, and poor are preset with the packet loss rate as a determination criterion, and the threshold intervals of the packet loss rate levels corresponding to the four quality levels are [0, 2%), [ 2%, 5%), [ 5%, 8%, [ 8%, 100% ], respectively. If the number of transmitted packets is 50 and the number of received packets is 47 in the analyzed data, the packet loss rate is 6%, and the level of the BFD forwarding path quality is determined to be medium.
By realizing the BFD ping function, the ping data packet completely walks the complete BFD path, and the packet loss and the time delay condition of the BFD path are detected.
The method for detecting the quality of the BFD forwarding path through the BFD ping is a protocol-independent detection method, and the BFD ping data packet sending path is completely consistent with the BFD message sending path, so that the quality condition of the BFD forwarding path can be accurately reflected.
According to the method for detecting the BFD forwarding path quality through the BFD ping, the path quality and the equipment state are judged in advance before the BFD detection is deployed through the BFD ping function, reference is provided for deployed BFD parameters according to a detection result, network deterioration caused by improper deployment of BFD is avoided, the method is irrelevant to a protocol, a sending path is completely consistent with a BFD message sending path, and the quality condition of the BFD forwarding path can be accurately reflected.
As shown in fig. 5, another embodiment of the present application provides an apparatus for detecting BFD forwarding path quality through BFD ping, including:
a creating module 10, configured to create a routing protocol between a sending-end routing device and a receiving-end routing device;
a linkage module 20, configured to link the routing protocol and bidirectional forwarding detection;
an encapsulation module 30, configured to create and encapsulate a bidirectional forwarding detection ping message;
a sending module 40, configured to send, by the sending-end routing device, the encapsulated bidirectional forwarding detection ping packet to the receiving-end routing device according to a bidirectional forwarding detection packet sending path;
an analysis module 50, configured to identify and analyze the received bidirectional forwarding detection ping packet, and display the analyzed data by the receiving-end routing device;
and a quality determination module 60, configured to determine the BFD forwarding path quality according to the data obtained by the analysis.
In some embodiments, the encapsulation module 30 is specifically configured to: and creating a bidirectional forwarding detection ping message, adding extension information and a message identifier into the bidirectional forwarding detection ping message, and packaging the message.
In some embodiments, as shown in fig. 6, parsing module 50 includes a first module 501, a second module 502, and a third module 503; the first module 501 is configured to identify, by the receiving-end routing device, the received bidirectional forwarding detection ping packet according to the packet identifier; a second module 502 is configured to parse the extension information in the encapsulated bidirectional forwarding detection ping message; the third module 503 is used for displaying the analyzed data.
In some embodiments, as shown in fig. 7, the second module 502 includes:
a counting unit 5021, configured to count the total number of transmitted data packets and the total number of received data packets;
a first calculating unit 5022, configured to calculate a sending interval between two adjacent data packets according to the current packet sending time in the packet;
the second calculating unit 5023 is configured to calculate a receiving interval between two adjacent data packets according to the time of receiving the data packets.
As shown in fig. 8, another embodiment of the present application provides an electronic device 100 comprising a memory 101, a processor 102, and a computer program stored on the memory 101 and executable on the processor 102, the processor 102 executing the program to implement the above-described method for detecting BFD forwarding path quality via BFD ping. In addition, the electronic device 100 further includes a bus 103 and a communication interface 104, and the memory 101, the processor 102, and the communication interface 104 are connected via the bus 103.
Another embodiment of the present application provides a computer-readable storage medium having stored thereon a computer program, which is executed by a processor to implement the above-described method of detecting BFD forwarding path quality via BFD ping.
It should be noted that:
the term "module" is not intended to be limited to a particular physical form. Depending on the particular application, a module may be implemented as hardware, firmware, software, and/or combinations thereof. Furthermore, different modules may share common components or even be implemented by the same component. There may or may not be clear boundaries between the various modules.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may be used with the teachings herein. The required structure for constructing such a device will be apparent from the description above. In addition, this application is not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the present application.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The above-mentioned embodiments only express the embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A method for detecting BFD forwarding path quality via BFD ping, comprising:
establishing a routing protocol between sending end routing equipment and receiving end routing equipment;
linking the routing protocol with bidirectional forwarding detection;
creating and packaging a bidirectional forwarding detection ping message;
sending the encapsulated bidirectional forwarding detection ping message to the receiving end routing equipment by the sending end routing equipment according to a bidirectional forwarding detection message sending path;
the receiving end routing equipment identifies and analyzes the received encapsulated bidirectional forwarding detection ping message, and displays the analyzed data;
and judging the BFD forwarding path quality according to the data obtained by analysis.
2. The method of claim 1, wherein the creating and encapsulating the bidirectional forwarding detection ping message comprises:
and creating a bidirectional forwarding detection ping message, adding extension information and a message identifier into the bidirectional forwarding detection ping message, and packaging the message.
3. The method of claim 2, wherein the receiving end routing device identifies and parses the received encapsulated bidirectional forwarding detection ping message, comprising:
and the receiving end routing equipment identifies the received encapsulated bidirectional forwarding detection ping message according to the message identification and analyzes the extended information in the encapsulated bidirectional forwarding detection ping message.
4. The method of claim 2, wherein the extension information comprises: current packet sending time, ping packet sequence number, head end packet sending total number and final packet end mark.
5. The method of claim 4, wherein parsing the extended information in the encapsulated bidirectional forwarding detection ping message comprises:
counting the total number of the sent data packets and the total number of the received data packets;
calculating the sending interval of two adjacent data packets according to the current packet sending time in the bidirectional forwarding detection ping message;
and calculating the receiving interval of two adjacent data packets according to the time for receiving the data packets.
6. The method of claim 2, wherein the parsed data comprises: the number of data packet transmissions, the number of data packet receptions, the packet loss rate, the maximum transmission interval, and the maximum reception interval.
7. The method of claim 1, wherein the routing protocol is an open shortest path first protocol, a label switched path protocol, or an MPLS TE protocol.
8. An apparatus for detecting BFD forwarding path quality via BFD ping, comprising:
the system comprises a creating module, a sending end routing device and a receiving end routing device, wherein the creating module is used for creating a routing protocol between the sending end routing device and the receiving end routing device;
the linkage module is used for linking the routing protocol with bidirectional forwarding detection;
the encapsulation module is used for creating and encapsulating the bidirectional forwarding detection ping message;
a sending module, configured to send, by the sending-end routing device, the encapsulated bidirectional forwarding detection ping packet to the receiving-end routing device according to a bidirectional forwarding detection packet sending path;
the analysis module is used for the receiving end routing equipment to identify and analyze the received encapsulated bidirectional forwarding detection ping message and display the analyzed data;
and the quality judgment module is used for judging the BFD forwarding path quality according to the data obtained by analysis.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the method of any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program is executed by a processor to implement the method according to any of claims 1-7.
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| CN1909470A (en) * | 2005-08-05 | 2007-02-07 | 华为技术有限公司 | Method for realizing failure detection of static route transfer plane |
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