CN115348273A - Service message processing method, device and storage medium - Google Patents

Service message processing method, device and storage medium Download PDF

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Publication number
CN115348273A
CN115348273A CN202210974190.1A CN202210974190A CN115348273A CN 115348273 A CN115348273 A CN 115348273A CN 202210974190 A CN202210974190 A CN 202210974190A CN 115348273 A CN115348273 A CN 115348273A
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message
sampling
int
information
node
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朱晟昦
曹坤
韦健
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Suzhou Centec Communications Co Ltd
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Suzhou Centec Communications Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • 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
    • H04L43/02—Capturing of monitoring data
    • H04L43/022—Capturing of monitoring data by sampling
    • H04L43/024—Capturing of monitoring data by sampling by adaptive sampling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a processing method, a device and a storage medium of a service message, which are applied to network monitoring of an enterprise network or a data center.

Description

Service message processing method, device and storage medium
Technical Field
The present invention relates to the field of Network communication technologies, and In particular, to a method, an apparatus, and a storage medium for processing a service packet requiring INT (In-band Network Telemetry).
Background
With the increasing complexity of network scale and increasing number of service types, network operation and maintenance are developing in the direction of remoteness, refinement and real-time, so that the requirement for network monitoring and measuring technology is increasing. The INT technology is therefore in need of incubation, a framework for collecting and reporting network states on the data plane, and a technology which does not need control plane participation.
INT is a path detection technology, which collects forwarding information of each hop of a service packet on the whole path and reports the forwarding information to a controller at a terminating node. The controller analyzes the forwarding information of the service message, so that the transmission quality of the service flow on the whole path can be monitored in real time, and further, because the controller has all information of the whole network, the analysis and planning can be performed from the global view, so that the service flow of the whole network is optimized, and the service quality of the network is improved.
However, as shown in fig. 1, in an INT detection domain composed of switches S1 to S4, S1 is a source node, S2 and S3 are intermediate transmission nodes, S4 is a termination node, a service packet enters from the source node S1 and flows out from the termination node S4, in an Inband mode, the source node of the INT domain performs INT information editing after performing accurate matching on an original service packet, the transmission node edits the INT packet, inserts metadata information of the present packet, and strips off the INT information before the termination node sends out, thereby recovering the original packet. Because the mode needs to directly modify the original message, the editing capability of the ASIC chip is strongly required, and because the minimum 4 bytes of metadata information needs to be added every node of one hop, the message after the multiple hops can be very long to influence the transmission bandwidth and the analysis and editing of the ASIC chip, so the detection can not be carried out in a large INT domain.
Disclosure of Invention
The invention aims to provide a method, a device and a storage medium for processing a service message, which ensure that each node for message forwarding can accurately obtain the same sampled message by setting a sampling identifier at a source node of the service message needing INT monitoring so as to improve the accuracy of network monitoring.
In order to achieve the purpose, the invention provides a method for processing a service message, when the service message is forwarded on a source node, a transmission node and a terminal node of an INT detection domain of a network switching device, the source node samples the message needing INT detection, a sampling identifier is made in a reserved byte bit of an IP (Internet protocol) head of the sampling message, and the transmission node and the terminal node upload and forward a mirror image of the sampling message according to the sampling identifier.
The invention also provides a device for processing the service message, which comprises: a source node, a transmission node and a termination node of an INT detection domain of a network switching device, the source node switching device comprising:
the source node INT information matching module is used for matching message information needing INT detection and acquiring INT information of the message;
the INT message sampling module is used for sampling the message to be processed in an INT postcard mode according to the INT information according to a certain frequency;
the source node mirror image uploading module is used for uploading the sampled message to the CPU after mirroring;
the sampling identification module is used for making sampling identification on the sampling message needing INT detection in the reserved byte bit of the IP header;
and the source node forwarding module is used for forwarding the message from the source node.
The transmission node switching apparatus includes:
the transmission node INT information matching module is used for matching message information needing INT detection and acquiring the INT information of the message;
the transmission node sampling message identification module is used for identifying a sampling message sampled by a source node according to a sampling identifier of a reserved byte bit in a message IP (Internet protocol) header;
the transmission node mirror image uploading module is used for mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
and the transmission node forwarding module is used for forwarding the sampling message.
The terminating node switch device includes:
the terminal node INT information matching module is used for matching the message information needing INT detection and acquiring the INT information of the message;
the terminal node sampling message identification module is used for identifying the sampling message sampled by the source node according to the sampling identifier of the reserved byte bit in the IP header of the message;
the terminal node mirror image uploading module is used for mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
the sampling identifier removing module is used for removing the sampling identifier of the reserved byte bit in the IP head of the sampling message;
and the terminal node forwarding module is used for forwarding the sampling message.
The invention also proposes a computer-readable storage medium, on which a computer program is stored which, when executed by a machine, implements the method described above.
The invention has the beneficial effects that: the INT sampling identifier is identified at the source node of the service message needing INT monitoring, and the transmission node and the terminal node identify the message sampled by the source node through the sampling identifier, so that each node for transmitting the INT message can accurately obtain the same sampled message, the difficulty and the risk of editing on the service message are reduced, the message editing amount of an ASIC chip is reduced, and the accuracy of network monitoring is improved.
Drawings
Fig. 1 is a schematic diagram of the behavior of a service packet in an INT detection domain in an Inband mode in the prior art;
FIG. 2 is a diagram illustrating a Flags field in an IP header in the message processing method according to the present invention;
FIG. 3 is a flow chart of the service packet processing at the source node according to the present invention;
FIG. 4 is a schematic diagram of the behavior of the service packet processed at the source node according to the present invention;
FIG. 5 is a flow chart of the service packet processing at the transmission node according to the present invention;
fig. 6 is a schematic diagram of the behavior of the service packet processed at the transmission node according to the present invention;
FIG. 7 is a flow chart of the present invention service packet processing at the terminating node;
fig. 8 is a schematic diagram of the behavior of the service packet processed at the terminating node according to the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the present invention.
The embodiment of the invention discloses a method for processing a service message, which is mainly applied to network monitoring of an enterprise network or a data center, and can obtain information such as a real-time path, time delay, congestion and the like of current service flow by reporting actual data flow information to a controller for analysis in real time. The INT sampling message is identified by adding a byte (bit) reserved in a Flags field of a message IP header of a source node into an INT sampling identification, so that the same sampled message can be obtained on the source node, a transmission node and a termination node of a service message transmission path, and the accuracy of network monitoring data is improved.
For the Flags field, an IP Flags field is defined in RFC 791 for identifying message fragmentation setting, where the specific use of each Bit is as shown in fig. 2, where Bit 0 is the highest byte Bit, is a reserved Bit, and is not used at present. Bit 1 is DF (Don't fragment), and can be fragmented or not, 0 indicates fragmentation, and 1 indicates non-fragmentation. Bit 2 is MF (More Fragment), which indicates whether the message is the last Fragment, 0 indicates the last Fragment, and 1 indicates that there is a Fragment behind.
Because Bit 0 is reserved Bit, the invention uses reserved byte Bit in the IP Flags field, namely the highest byte Bit (namely Bit 0), as the identifier of the sampling message in INT for identifying the sampling message, so that the service message can be accurately identified in INT monitoring on a source node, a transmission node and a termination node of a forwarding path in an INT detection domain of the network switching equipment, thereby improving the accuracy of network monitoring. In the embodiment, the highest byte position of the IP Flags field is used as the sampling identifier by setting 1, in other embodiments of the present invention, reserved byte positions in other fields of the IP header may also be used as the sampling identifier, and the processing process of the packet is the same as that of using the reserved bits of the Flags field.
Specifically, INT monitoring of a service packet relates to a source node, a transmission node, and a termination node of a forwarding path in an INT detection domain of a network switching device, where the transmission node is a node device between the source node and the termination node, and generally includes at least one transmission node switching device, the switching device of each node includes an ASIC chip and a system CPU for processing the service packet, and the system CPU of this stage finally sends an INT report packet of the node of this stage to a monitor for network monitoring.
As shown in fig. 3 and 4, the processing of the service packet by the source node includes:
s11, receiving a message, matching message information needing INT detection according to information carried by the message, and obtaining INT information of the message;
s12, sampling the message to be processed in an INT postcard mode according to a certain frequency according to the INT information;
s13, mirror-imaging the sampling message and uploading the sampling message to a CPU;
s14, forwarding after the sampling identification is made on the highest bit of the Flags field in the IP header of the sampling message.
Specifically, after a service message enters source node switching equipment, the service message is received in an incoming direction processing engine of an ASIC chip of the switching equipment and then forwarded to an ACL (access control list), meanwhile, the ACL performs message information matching according to received message information and specified message characteristic information sent by a CPU of the system at the current level, the message information comprises quintuple information (a source IP address, a source port, a destination IP address, a destination port and a transport layer protocol) or other message information specified by a user, the message information is accurately matched by configuring the ACL, and INT information of the message is output, wherein the output INT information comprises an INT mode, node types and the like, the INT mode comprises an Inband (in-band) mode and a Postcard (post card) mode, and the node types are a source node, a transmission node or a terminating node of a transmission path.
The exit direction processing engine of the ASIC chip analyzes the INT information of the message sent by the entry direction processing engine, identifies the message needing to be processed according to an INT Postcard mode, samples the message according to the configured sampling frequency, marks the sampled message as a sampling message, generates a mirror image message after mirror image copy processing on the one hand, and uploads the mirror image message to a CPU of the node system for further processing on the other hand, edits the sampling message, makes a sampling identifier at the highest position in a Flags field of an IP header of the message, and if the highest position 1 of the Flags field is used as a sampling identifier position to represent that the message is sampled, the sampling identifier does not influence the scheduling and forwarding of the message, and the sampled message is directly forwarded to a transmission node as other non-sampled messages.
Meanwhile, after receiving the mirror image message, the CPU of the node system edits the message, such as adding an INT header and Metadata (Metadata) information of the node, and a message header including related information of the message in the ASIC chip, to form an INT report message, and the CPU further uploads the INT report message to the controller for network monitoring. The node metadata comprises information such as access nodes and access timestamps.
As shown in fig. 5 and 6, the processing of the service packet by the transmission node includes:
s21, receiving the message, matching the sampling identification of the INT message with the information to be detected and obtaining the INT information of the message,
s22, identifying a sampling message sampled by a source node according to the sampling identifier of the highest byte bit of a Flags field in the IP header of the message;
s23, mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification, and uploading the mirrored sampling message to a CPU;
and S24, forwarding the sampling message.
Specifically, for a service message transmitted to a transmission node, an incoming direction processing engine of an ASIC chip receives the service message and then forwards the message to an ACL, and the ACL performs message information matching according to the received message information and specified message characteristic information sent from a system of the current stage, where the message information includes quintuple information, information specified by other users, and sampling identification information of an IP header flag field. And after the message information is accurately matched by configuring the ACL, outputting the INT information of the message, wherein the output INT information comprises an INT mode, and the INT information comprises the INT mode of the current message, the type of the node where the INT information is located and the like.
After the outbound direction processing engine module of the transmission node ASIC chip receives a sampling message which needs INT postcard processing and is sampled at a source node, the message is directly subjected to mirror image copying processing without further sampling, a mirror image message is generated and uploaded to a system CPU for processing, and the sampling message and other messages are continuously forwarded to a next transmission node or a final node. After receiving the mirror image message, the CPU of the node system performs the same processing as that of the CPU of the source node system, adds the information of an INT (INT) header and Metadata to the message to form an INT report message, and further reports the INT report message to the controller for network monitoring.
As shown in fig. 7 and 8, the processing of the service packet by the terminating node includes:
s31, receiving the message, matching the sampling identification of the INT message with the information to be detected and acquiring the INT information of the message;
s32, identifying a sampling message sampled by a source node according to a sampling identifier of the highest byte bit of a Flags field in the IP header of the message;
s33, mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification, and uploading the sampling message to a CPU;
and S34, removing the sampling identifier of the highest byte bit in the IP header from the sampling message and then forwarding the sampling message.
Specifically, after the service message is further transmitted to the terminating node, the service message is received by an incoming direction processing engine module on an ASIC chip of the terminating node and is further forwarded to an ACL, the ACL performs message information matching according to the received message information and specified message characteristic information issued from the system at this stage, the message information is quintuple information or information specified by other users, and sampling identification information of the highest bit of an IP header flag field, the sampling message whose sampling has been completed by the source node is accurately matched through the sampling information of the highest bit of the IP header flag field, and matched INT information is output, and the INT information is the same as INT information of the transmission node, and includes an INT mode, a node type, and the like.
And after an outgoing direction processing engine module of the ASIC chip of the terminal node receives the sampling message with the INT mode being INT postcard, mirror image copying the message to generate a mirror image message, uploading the mirror image message to a CPU for further processing, and after the highest byte bit of a flag field in an IP head of the sampling message is restored to be the initial setting, forwarding the message out of transmission equipment outside the INT domain, and normally forwarding other messages.
After receiving the mirror image message, the CPU of the node system is the same as the CPU of the source node and the transmission node system in processing, adds INT head and Metadata information to the message to form an INT report message, and further reports the INT report message to the controller for network monitoring. Because the sampling identifier is arranged at the highest byte position of the IP header Flags field, the transmission node, the terminating node and the source node can accurately obtain the same sampled message, and the message information of the uploading controller is the information of the same message, so that the aim that each node in an INT domain obtains the input and output interface, queue information, delay information and the like of the same message is achieved, and the controller can obtain the accurate network state information and topology information of real-time message flow to the maximum extent. In addition, the scheme uses the reserved bit of the IP header Flags field, so that the normal forwarding behavior of the service message is not influenced.
Correspondingly, the embodiment of the present invention further discloses a device for processing a service packet, which includes a switching device of a source node, a transmission node and a termination node of an INT detection domain of a network switching device, wherein an ASIC chip of the source node switching device includes:
the source node INT information matching module is arranged in an input direction processing engine module of the ASIC chip and is used for matching message information needing INT detection and acquiring INT information of the message;
the INT message sampling module is arranged in an outgoing direction processing engine module of the ASIC chip and used for sampling a message needing to be processed in an INT postcard mode according to the INT information at a certain frequency;
the source node mirror image uploading module is used for uploading the sampled message to the CPU after mirroring;
the sampling identification module is used for making sampling identification on the sampling message needing INT detection in the reserved byte bit of the IP header;
and the source node forwarding module is used for forwarding the sampling message and other messages from the output direction processing engine module of the ASIC chip.
The switching device of the transmission node comprises:
the transmission node INT information matching module is used for matching message information needing INT detection and acquiring the INT information of the message;
the transmission node sampling message identification module is used for identifying a sampling message sampled by a source node according to a sampling identifier of a reserved byte bit in a message IP (Internet protocol) header;
the transmission node mirror image uploading module is used for mirroring the sampling message needing to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
and the transmission node forwarding module is used for forwarding the sampling message.
The switching device of the terminating node comprises:
the terminal node INT information matching module is used for matching the message information needing INT detection and acquiring the INT information of the message;
the terminal node sampling message identification module is used for identifying the sampling message sampled by the source node according to the sampling identifier of the reserved byte bit in the IP header of the message;
the terminal node mirror image uploading module is used for mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
the sampling identifier removing module is used for removing the sampling identifier of the reserved byte bit in the IP header of the sampling message;
and the terminal node forwarding module is used for forwarding the sampling message.
The switching equipment of the source node, the transmission node and the terminal node also respectively comprises a local-level system CPU which is used for sending specified message characteristic information to each level of ASIC chips, receiving a mirror image message after mirror image copying of the sampled message, adding an INT head and local node Metadata (Metadata) information to the mirror image message to form an INT report message, and further uploading the INT report message to the controller.
The invention also discloses a computer readable storage medium, in which a computer program is stored, which, when executed by a processor, implements the above method. Wherein the computer program comprises computer program code, which may be in source code form, an executable file or some intermediate form, etc., and the computer readable medium may comprise any entity or device capable of carrying the computer program code, a recording medium, a usb disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a Random Access Memory (RAM), etc.
Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.

Claims (10)

1. A processing method of service message is characterized in that when the service message is forwarded in a plain film mode on a source node, a transmission node and a terminal node of an INT detection domain of a network switching device, the source node samples the message needing INT detection, a sampling identifier is made in a reserved byte bit of an IP head of the sampling message, and the transmission node and the terminal node upload and forward the sampling message in a mirror image mode according to the sampling identifier.
2. The method for processing service messages according to claim 1, wherein the reserved field of the IP header is a reserved byte bit in a Flags field, and the reserved byte bit is a highest byte bit in the Flags field.
3. The method according to claim 1, wherein the processing of the service packet by the source node comprises:
receiving a message, matching message information needing INT detection according to information carried by the message, and obtaining INT information of the message;
sampling a message needing to be processed in an INT postcard mode according to the INT information at a certain frequency;
the sampling message is mirrored and then uploaded to a CPU;
and editing the sampling identifier in the reserved byte bit of the IP header of the sampling message and then forwarding the sampling identifier.
4. The method according to claim 1, wherein the processing of the service packet by the transmission node comprises:
receiving a message, matching a sampling identifier of the INT message with information to be detected and acquiring INT information of the message;
identifying a sampling message sampled by a source node according to the sampling identifier;
according to the INT information and the sampling identification, mirroring the sampling message to be processed in an INT postcard mode and then uploading the sampling message to a CPU;
and forwarding the sampling message.
5. The method for processing the service packet according to claim 1, wherein the processing of the service packet by the terminating node includes:
receiving a message, matching a sampling identifier of the INT message with information to be detected and acquiring INT information of the message;
identifying a sampling message sampled by a source node according to the sampling identifier;
according to the INT information and the sampling identification, mirroring the sampling message to be processed in an INT postcard mode and then uploading the sampling message to a CPU;
and removing the sampling identifier of the reserved byte bit in the IP header from the sampling message and then forwarding the sampling message.
6. The method according to any of claims 3 to 5, wherein after the sampled message is uploaded to a CPU of a local system in a mirror image manner,
the CPU carries out editing processing of adding INT header and Metadata information according to the information carried by the sampling message to form an INT report message;
and sending the INT report message to the controller for INT network monitoring.
7. A device for processing a service packet, comprising: a source node, a transmission node and a termination node of an INT detection domain of a network switching device, the source node switching device comprising:
the source node INT information matching module is used for matching the message information needing INT detection and acquiring the INT information of the message;
the INT message sampling module is used for sampling the message to be processed in an INT postcard mode according to the INT information according to a certain frequency;
the source node mirror image uploading module is used for uploading the sampled message to the CPU after mirror image;
the sampling identification module is used for making sampling identification on the sampling message needing INT detection in the reserved byte bit of the IP header;
and the source node forwarding module is used for forwarding the message from the source node.
8. A device for processing a service packet, comprising: a source node, a transmission node and a termination node of an INT detection domain of a network switching device, the transmission node switching device comprising:
the transmission node INT information matching module is used for matching message information needing INT detection and acquiring the INT information of the message;
the transmission node sampling message identification module is used for identifying a sampling message sampled by a source node according to a sampling identifier of a reserved byte bit in a message IP (Internet protocol) header;
the transmission node mirror image uploading module is used for mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
and the transmission node forwarding module is used for forwarding the sampling message.
9. A device for processing a service packet, comprising: a source node, a transmission node and a terminating node of an INT detection domain of a network switching device, the terminating node switching device comprising:
the terminal node INT information matching module is used for matching the message information needing INT detection and acquiring the INT information of the message;
the terminal node sampling message identification module is used for identifying the sampling message sampled by the source node according to the sampling identifier of the reserved byte bit in the IP header of the message;
the terminal node mirror image uploading module is used for mirroring the sampling message to be processed in an INT postcard mode according to the INT information and the sampling identification and then uploading the sampling message to a CPU;
the sampling identifier removing module is used for removing the sampling identifier of the reserved byte bit in the IP header of the sampling message;
and the terminal node forwarding module is used for forwarding the sampling message.
10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a machine, implements the method of any one of claims 1 to 6.
CN202210974190.1A 2022-08-15 2022-08-15 Service message processing method, device and storage medium Pending CN115348273A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116319468A (en) * 2023-05-23 2023-06-23 苏州浪潮智能科技有限公司 Network telemetry method, device, switch, network, electronic equipment and medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116319468A (en) * 2023-05-23 2023-06-23 苏州浪潮智能科技有限公司 Network telemetry method, device, switch, network, electronic equipment and medium
CN116319468B (en) * 2023-05-23 2023-08-04 苏州浪潮智能科技有限公司 Network telemetry method, device, switch, network, electronic equipment and medium

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