CN115277510B - Method for automatically identifying equipment, equipment interface and equipment path in network session - Google Patents
Method for automatically identifying equipment, equipment interface and equipment path in network session Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000013507 mapping Methods 0.000 claims abstract description 53
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 230000009191 jumping Effects 0.000 claims description 36
- 238000005206 flow analysis Methods 0.000 abstract 1
- 238000005457 optimization Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000009960 carding Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/02—Standardisation; Integration
- H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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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
- H04L67/14—Session management
Abstract
The invention relates to the technical field of network flow analysis, and discloses a method for automatically identifying equipment, equipment interfaces and equipment paths in a network session, which comprises the following steps: s1, configuring basic information of a plurality of network devices, and binding the network devices with link numbers to establish a first mapping table of the network devices and corresponding links; s2, reading SNMP information of the network equipment, and constructing a second mapping table of a first interface index number and an interface number of the network equipment interface; s3, obtaining a time stamp, a second interface index number and a link number corresponding to each link in the network session analysis data, and arranging the corresponding link numbers according to the time sequence of a plurality of time stamps; s4, according to the first mapping table, ordering of a plurality of network devices is obtained; s5, according to the second mapping table, the ordering of the network equipment interfaces is obtained. The invention can reduce the time consumed by a user when analyzing and configuring the equipment in the network.
Description
Technical Field
The invention relates to the technical field of network traffic analysis, in particular to a method for automatically identifying equipment, equipment interfaces and equipment paths in a network session.
Background
At present, session analysis of many analysis software mainly takes a link as a view angle, and mainly displays statistical indexes of the link and compares indexes among links, so that a user wants to perform session analysis by taking equipment as a view angle, and often needs to manually configure a session path, namely, many analysis software can only manually configure an equipment path by the user when performing network topology configuration and service configuration. That is, in the actual use process of the user, when the user wants to view the device through which the session passes by using the device as a view angle, the user often views the result of manual configuration, but the result of the manually configured network path may be inaccurate, if the configuration is wrong, unavoidable losses are caused, meanwhile, the user also consumes excessive time for configuring the device path in the network session, and the user easily configures errors without knowing the relationship between the network topology and the device, so that a subsequent series of analysis monitoring data errors cause unavoidable losses.
Disclosure of Invention
The invention provides a method for automatically identifying equipment, equipment interfaces and equipment paths in a network session, which can automatically identify the equipment and equipment interfaces in the network session, and automatically comb the sequence of the paths of the session flow routing equipment, so as to automatically generate the relation between a service logic diagram and the equipment in a network topology diagram.
The invention is realized by the following technical scheme:
a method for automatically identifying devices, device interfaces, device paths in a network session, comprising:
s1, configuring basic information of a plurality of network devices, and binding the network devices with link numbers to establish a first mapping table of the network devices and corresponding links, wherein the network devices and the link numbers correspond to each other one by one;
s2, reading SNMP information of the network equipment, and constructing a second mapping table of a first interface index number and an interface number of the network equipment interface;
s3, obtaining a time stamp, a second interface index number and a link number corresponding to each link in the network session analysis data, and arranging the corresponding link numbers according to the time sequence of a plurality of time stamps;
s4, according to the first mapping table, matching and mapping the link numbers and the network equipment to obtain the ordering of a plurality of network equipment;
s5, according to the second mapping table, matching and mapping the second interface index number and the first interface index number of the corresponding network equipment to obtain the ordering of a plurality of network equipment interfaces;
s6, sorting the results of the S4 and the S5 to obtain a sorting mode of the network equipment and the network equipment interfaces according to the flow path of the network session, wherein the sorting mode of the network equipment is the equipment path.
As an optimization, the network session is a unidirectional session, the direction from the client to the server is defined as transmitting, the direction from the server to the client is defined as receiving, and the interface numbers comprise a transmitting-in interface number, a transmitting-out interface number or a receiving-in interface number and a receiving-out interface number of the network device.
As an optimization, the network session is a bidirectional session, the direction from the client to the server is defined as transmitting, the direction from the server to the client is defined as receiving, and the interface numbers comprise a transmitting-in interface number, a transmitting-out interface number, a receiving-in interface number and a receiving-out interface number of the network device.
As optimization, in S1, binding the network device with the link number is specifically binding the IP address of the network device with the link number.
As optimization, the specific steps in S3 are:
s3.1, capturing a link through which a network session passes;
s3.2, decoding the data packet passing through the link to obtain a time stamp and a second interface index number in the data packet, and then arranging corresponding link numbers according to the time sequence of a plurality of time stamps.
As optimization, the method for judging the arrangement sequence of the links corresponding to the time stamps comprises the following steps: subtracting the time of starting the network session from the time stamp corresponding to each link, and judging that the time of passing the link is more backward if the time difference between the time stamp and the time is larger.
As optimization, in S4, according to the first mapping table, the specific steps of matching the link number with the network device to obtain the ordering of the plurality of network devices are as follows:
s4.1, judging whether corresponding network equipment exists in the first mapping table according to the obtained link number; if the corresponding network equipment exists, jumping to S4.2, otherwise, jumping to S4.3;
s4.2, outputting the IP of the network equipment, then jumping to S4.5, otherwise, returning to S4.1, and continuing to judge the network equipment corresponding to the link number corresponding to the next time stamp;
s4.3, judging whether the link number and the new network equipment need to be matched and mapped and added into a first mapping table, if so, jumping to S4.4, otherwise, jumping to S4.5;
s4.4, carrying out matching mapping on the link number and the new network equipment, adding the link number and the new network equipment into a first mapping table, and then outputting the IP of the newly-built network equipment;
s4.5, judging whether the link number is the last link number in the network session, if so, jumping to S4.6, otherwise, returning to S4.1;
s4.6, ending.
As optimization, the specific steps of S5 are:
s5.1, judging whether a corresponding first interface index number exists in the second mapping table according to the obtained second interface index number; if the corresponding first interface index number exists, jumping to S5.2, otherwise jumping to S5.3;
s5.2, outputting the interface number of the network equipment, then jumping to S5.4, otherwise, returning to S5.1;
s5.3, judging whether the second interface index number is required to be matched and mapped with the first interface index number of the new network equipment and added into a second mapping table, if so, jumping to S5.4, otherwise, jumping to S5.5;
s5.4, carrying out matching mapping on the second interface index number and a first interface index number of the new network equipment, adding the second interface index number and the first interface index number into a second mapping table, and then outputting the first interface index number of the newly-built network equipment;
s5.5, judging whether the second interface index number is the last second interface index number in the network session, if so, jumping to S5.6, otherwise, returning to S5.1;
s5.6, ending.
As an optimization, the link types in the network session are types other than the Flow type.
As an optimization, the network session is a TCP session.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention can automatically identify the equipment and the equipment path in the network session, automatically configure the equipment connection relation in the network topological graph, reduce the time consumed by a user when analyzing and configuring the equipment in the network, ensure the accuracy of the analysis and configuration scene related to the equipment, and avoid the user from making error judgment on the network performance, network faults and the like under the situation that the user does not know the relation of the actual network equipment.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a flow chart of a method for automatically identifying devices, device interfaces, and device paths in a network session according to the present invention;
fig. 2 is a process diagram of the method of the present invention for automatic identification of devices and device interfaces and automatic carding of device paths after the mirrored traffic of the remote network traffic monitoring technology ERSPANv3 transmitted across three layers of IP passes.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Examples
As shown in fig. 1, a method for automatically identifying a device, a device interface, and a device path in a network session includes:
s1, configuring basic information of a plurality of network devices, binding the network devices with link numbers to establish a first mapping table of the network devices and corresponding links, and specifically binding IP of the network devices with the link numbers. The network device and the links are in one-to-one correspondence, and when a link is selected, the link of the Flow type and the sub-link of the Flow type are not supported, because the link of the Flow type cannot decode the data packet, and a lot of critical data (a timestamp, a second interface index number and the like) cannot be acquired when the link cannot be decoded. The basic information here includes snmp information, a name and a description of the network device in the system, an IP address of the network device, and other user-known information. When data configuration is carried out, a corresponding network equipment ID is created, and the configured link ID and the network equipment ID are mapped to be bound.
S2, reading SNMP information of the network equipment, and constructing a second mapping table of a first interface index number and an interface number of the network equipment interface; and reading SNMP related information of the device through device configuration, obtaining a first interface index number (ifindex) and an interface number (ifname) of the network device, and forming a second mapping table. In SNMP configuration, a drop-down item may be added in the polling frequency drop-down on the operation page: 24 hours, mainly for the device path combing function, i.e. combing the device path case of the previous 24H with the current time as the end time.
S3, obtaining a time stamp, a second interface index number and a link number corresponding to each link in the network session analysis data, and arranging the corresponding link numbers according to the time sequence of a plurality of time stamps.
In this embodiment, the network session is a unidirectional session, a client-to-server direction is defined as sending, and a server-to-client direction is defined as receiving, where the interface number includes a sending-in interface number, a sending-out interface number, or a receiving-in interface number, and a receiving-out interface number of the network device.
In this embodiment, the network session is a bidirectional session, a client-to-server direction is defined as sending, and a server-to-client direction is defined as receiving, where the interface number includes a sending-in interface number, a sending-out interface number, a receiving-in interface number, and a receiving-out interface number of the network device.
The interface numbers are displayed according to the analysis direction selected by the user, if unidirectional analysis is selected, only two interface numbers in the corresponding direction (the direction of the client side- > the direction of the server corresponds to sending, the direction of the server side- > the direction of the client side corresponds to receiving) are displayed, and the other two interface numbers are displayed as-; if bi-directional analysis is selected, four interface numbers are displayed.
In this embodiment, the specific steps in S3 are as follows:
s3.1, capturing a link through which a network session passes; since only links through which a network session flows can generate data, it is known which links provide data after the network session flows through the links through which the network session passes.
S3.2, decoding the data packet passing through the link to obtain a time stamp and a second interface index number in the data packet, and then arranging corresponding link numbers according to the time sequence of a plurality of time stamps. The method comprises the steps of capturing a data packet in two directions of a network session through a data acquisition point (link), decoding the data packet, obtaining information such as an input interface index number (input index), an output interface index number (output index), a source ID (sourceID), a timestamp (nano timestamp) and the like output in decoding protocol data, wherein the sequence of the data acquisition point (link) through which the session passes can be determined through the size of the timestamp of the same data packet flowing through different data acquisition points (links), and then replacing the links with devices to obtain a device path.
Respectively taking a first data packet in a frame selection time range on each link according to a sending and/or receiving direction, and obtaining a timestamp and a second interface index number (ifindex information) through decoding; determining network equipment corresponding to a link through the mapping relation between the network equipment and the link number in the first mapping table; and then the interface number (ifname information) of the network equipment is queried through the second mapping table. In this embodiment, the method for determining the arrangement sequence of the links corresponding to the time stamps includes: subtracting the time of starting the network session from the time stamp corresponding to each link, and judging that the time of passing the link is more backward if the time difference between the time stamp and the time is larger. The following is formulated according to the flow direction of the network session, and if the flow direction of the network session is the direction of the client- > server, the more the following is, the more the server is, whereas if the flow direction of the network session is the direction of the server- > client, the more the following is, the more the client is.
The data collection points (links) through which the network session flows are mapped with the link data sets configured by the network devices, and the data collection points (links) can be mapped to the correspondingly configured devices. The method comprises the following steps:
s4, according to the first mapping table, matching and mapping the link numbers and the network equipment to obtain the ordering of a plurality of network equipment; in this embodiment, in S4, according to the first mapping table, the specific steps of matching the link number with the network device to obtain the ordering of the plurality of network devices are as follows:
s4.1, judging whether corresponding network equipment exists in the first mapping table according to the obtained link number; if the corresponding network equipment exists, jumping to S4.2, otherwise, jumping to S4.3;
s4.2, outputting the IP of the network equipment, then jumping to S4.5, otherwise, returning to S4.1, and continuing to judge the network equipment corresponding to the link number corresponding to the next time stamp;
s4.3, judging whether the link number and the new network equipment need to be matched and mapped and added into a first mapping table, if so, jumping to S4.4, otherwise, jumping to S4.5;
s4.4, carrying out matching mapping on the link number and the new network equipment, adding the link number and the new network equipment into a first mapping table, and then outputting the IP of the newly-built network equipment;
s4.5, judging whether the link number is the last link number in the network session, if so, jumping to S4.6, otherwise, returning to S4.1;
s4.6, ending.
S5, according to the second mapping table, matching and mapping the second interface index number and the first interface index number of the corresponding network equipment to obtain the ordering of a plurality of network equipment interfaces; after the data packet is obtained and decoded, the input interface index number (input index) and the output interface index number (output index) in the data packet are mapped with the first interface index number and the interface name in the second index table to obtain corresponding input interface number and output interface number.
In this embodiment, the specific steps of S5 are as follows:
s5.1, judging whether a corresponding first interface index number exists in the second mapping table according to the obtained second interface index number; if the corresponding first interface index number exists, jumping to S5.2, otherwise jumping to S5.3;
s5.2, outputting the interface number of the network equipment, then jumping to S5.4, otherwise, returning to S5.1;
s5.3, judging whether the second interface index number is required to be matched and mapped with the first interface index number of the new network equipment and added into a second mapping table, if so, jumping to S5.4, otherwise, jumping to S5.5;
s5.4, carrying out matching mapping on the second interface index number and a first interface index number of the new network equipment, adding the second interface index number and the first interface index number into a second mapping table, and then outputting the first interface index number of the newly-built network equipment;
s5.5, judging whether the second interface index number is the last second interface index number in the network session, if so, jumping to S5.6, otherwise, returning to S5.1;
s5.6, ending.
S6, sorting the results of the S4 and the S5 to obtain a sorting mode of the network equipment and the network equipment interfaces according to the flow path of the network session, wherein the sorting mode of the network equipment is the equipment path.
On the operation page, it can be operated as follows:
clicking a 'show path' button, ejecting a 'device path combing' bullet frame, and combing out network devices through which the network session passes in the bullet frame by taking the devices as view angles, wherein the network devices comprise IP addresses of the devices and interface numbers of the devices. If the network device is not matched, displaying prompt information in the bullet frame: if the device path is not combed, the network device is required to confirm whether an associated link is configured or not, the display mode of the path in the device path combing elastic frame is consistent with the path displayed according to the direction during TCP session multi-section analysis, if the link is not associated with the device, the device is displayed as an unknown device, and the device is used for occupying the place and not making path change.
As shown in fig. 2, the mirror traffic of the remote network traffic monitoring technology ERSPANv3 (hereinafter referred to as ERSPANv 3) transmitted by three layers of IP can perform automatic identification of devices and device interfaces and automatic carding of device paths in the above manner. The specific implementation is as follows:
a) The mirrored traffic captured to ERSPANv3 contains nanosecond timestamps and outputs an input interface index number (input ifindex), an output interface index number (output ifindex), a source ID (sourceID), and a timestamp (nano timestamp).
b) And searching the link with the TCP session by taking the TCP session tetrad as a searching condition.
c) Performing data packet decoding for the searched TCP session, comparing the same data packet time stamps on different links, and determining the sequence of the session passing through the links;
d) The method comprises the steps of reading SNMP information of a CE switch through an out-of-band management network, and obtaining a mapping table of a network device with a first interface index number (ifindex) and an interface number (ifname) through SNMP polling;
e) Configuring an OID (object identifier) and an associated link in a network device, replacing the link with the network device according to the association relationship between the network device and the link, and completely drawing the device, the device interface and the device path which the session passes through.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A method for automatically identifying devices, device interfaces, and device paths in a network session, comprising:
s1, configuring basic information of a plurality of network devices, and binding the network devices with link numbers to establish a first mapping table of the network devices and corresponding links, wherein the network devices and the link numbers correspond to each other one by one;
s2, reading SNMP information of the network equipment, and constructing a second mapping table of a first interface index number and an interface number of the network equipment interface;
s3, obtaining a time stamp, a second interface index number and a link number corresponding to each link in the network session analysis data, and arranging the corresponding link numbers according to the time sequence of a plurality of time stamps;
s4, according to the first mapping table, matching and mapping the link numbers and the network equipment to obtain the ordering of a plurality of network equipment;
s4.1, judging whether corresponding network equipment exists in the first mapping table according to the obtained link number; if the corresponding network equipment exists, jumping to S4.2, otherwise, jumping to S4.3;
s4.2, outputting the IP of the network equipment, then jumping to S4.5, otherwise, returning to S4.1, and continuing to judge the network equipment corresponding to the link number corresponding to the next time stamp;
s4.3, judging whether the link number and the new network equipment need to be matched and mapped and added into a first mapping table, if so, jumping to S4.4, otherwise, jumping to S4.5;
s4.4, carrying out matching mapping on the link number and the new network equipment, adding the link number and the new network equipment into a first mapping table, and then outputting the IP of the newly-built network equipment;
s4.5, judging whether the link number is the last link number in the network session, if so, jumping to S4.6, otherwise, returning to S4.1;
s4.6, ending;
s5, according to the second mapping table, matching and mapping the second interface index number and the first interface index number of the corresponding network equipment to obtain the ordering of a plurality of network equipment interfaces;
s6, sorting the results of the S4 and the S5 to obtain a sorting mode of the network equipment and the network equipment interfaces according to the flow path of the network session, wherein the sorting mode of the network equipment is the equipment path.
2. A method of automatically identifying a device, a device interface, a device path in a network session according to claim 1, wherein the network session is a unidirectional session, the client-to-server direction is defined as send, and the server-to-client direction is defined as receive, the interface number comprising a send-in interface number, a send-out interface number, or a receive-in interface number, a receive-out interface number of the network device.
3. A method for automatically identifying devices, device interfaces, and device paths in a network session according to claim 1, wherein the network session is a bi-directional session, the client-to-server direction is defined as send, and the server-to-client direction is defined as receive, and wherein the interface number comprises a send-in interface number, a send-out interface number, a receive-in interface number, and a receive-out interface number of the network device.
4. The method for automatically identifying a device, a device interface, and a device path in a network session according to claim 1, wherein in S1, binding the network device with a link number is specifically binding an IP address of the network device with the link number.
5. The method for automatically identifying devices, device interfaces, and device paths in a network session according to claim 1, wherein the specific steps in S3 are as follows:
s3.1, capturing a link through which a network session passes;
s3.2, decoding the data packet passing through the link to obtain a time stamp and a second interface index number in the data packet, and then arranging corresponding link numbers according to the time sequence of a plurality of time stamps.
6. The method for automatically identifying a device, a device interface, and a device path in a network session according to claim 5, wherein the method for determining the arrangement sequence of the links corresponding to the time stamps is as follows: subtracting the time of starting the network session from the time stamp corresponding to each link, and judging that the time of passing the link is more backward if the time difference between the time stamp and the time is larger.
7. The method for automatically identifying devices, device interfaces, and device paths in a network session according to claim 1, wherein the specific step of S5 is:
s5.1, judging whether a corresponding first interface index number exists in the second mapping table according to the obtained second interface index number; if the corresponding first interface index number exists, jumping to S5.2, otherwise jumping to S5.3;
s5.2, outputting the interface number of the network equipment, then jumping to S5.4, otherwise, returning to S5.1;
s5.3, judging whether the second interface index number is required to be matched and mapped with the first interface index number of the new network equipment and added into a second mapping table, if so, jumping to S5.4, otherwise, jumping to S5.5;
s5.4, carrying out matching mapping on the second interface index number and a first interface index number of the new network equipment, adding the second interface index number and the first interface index number into a second mapping table, and then outputting the first interface index number of the newly-built network equipment;
s5.5, judging whether the second interface index number is the last second interface index number in the network session, if so, jumping to S5.6, otherwise, returning to S5.1;
s5.6, ending.
8. The method for automatically identifying a device, a device interface, and a device path in a network session according to claim 1, wherein the link type in the network session is a type other than a Flow type.
9. A method of automatically identifying a device, device interface, device path in a network session according to claim 1, wherein the network session is a TCP session.
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| CN116939669B (en) * | 2023-09-18 | 2023-12-08 | 武汉博易讯信息科技有限公司 | Network element identification method, system, equipment and readable medium based on IP learning table |
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