CN108616385A - The querying method of Simple Network Management Protocol agency, MIB traversal of tree method and system - Google Patents

The querying method of Simple Network Management Protocol agency, MIB traversal of tree method and system Download PDF

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CN108616385A
CN108616385A CN201810273481.1A CN201810273481A CN108616385A CN 108616385 A CN108616385 A CN 108616385A CN 201810273481 A CN201810273481 A CN 201810273481A CN 108616385 A CN108616385 A CN 108616385A
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mib
current
tables
mib tables
network management
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CN108616385B (en
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芦枫
阎姗
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Fiberhome Telecommunication Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02Standardisation; Integration
    • H04L41/0213Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/04Network management architectures or arrangements
    • H04L41/046Network management architectures or arrangements comprising network management agents or mobile agents therefor

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer And Data Communications (AREA)

Abstract

The invention discloses the querying method of Simple Network Management Protocol agency a kind of, MIB traversal of tree method and system, are related to field of communication technology.This querying method includes the following steps:Request messages of the Simple Network Management Protocol SNMP agent receiving network managing system NMS to the GetNext or GetBulk of the managed object in management information bank MIB;When example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, are begun look for from first node of next MIB tables of current MIB tables, and return to lookup result, wherein current MIB tables include at least two leaf nodes.The present invention can reduce the Processing Algorithm expense that SNMP agent asks GetNext and GetBulk, bring the effect of optimization, promote response speed of the network equipment for both requests of GetNext and GetBulk.

Description

The querying method of Simple Network Management Protocol agency, MIB traversal of tree method and system
Technical field
The present invention relates to field of communication technology, it is specifically related to a kind of querying method of Simple Network Management Protocol agency, MIB trees Traversal method and system.
Background technology
Simple Network Management Protocol (Simple Network Management Protocol, SNMP) is to be based on TCP/IP An application layer protocol, be mainly used for the management of the network equipment.Snmp protocol provides a kind of cross-platform equipment of unification Management method, Network Management System (Network Management System, NMS) can be realized by snmp protocol and be acquired The operations such as the information of equipment, the parameter value for changing equipment and monitoring device state.For safeguarding various letters on managed devices Breath data simultaneously respond the software modules of NMS operation requests and are referred to as SNMP agent (SNMP Agent), and each SNMP agent has The management information bank (Management Information Base, MIB) of oneself, MIB is hierarchical tree-like structure, the node of tree Indicate that managed object, MIB give the data structure of the set of managed object, there are one right for each managed object tool As identifier (Object Identifier, OID).
Currently used SNMPv2 version definitions Get, GetNext, Response, Set, Trap, GetBulk and 7 kinds of action types of Inform, wherein GetNext operations obtain one or more parameter values for realizing NMS from SNMP agent Next parameter value;GetBulk operations are the extensions operated for GetNext in SNMPv2 versions, it is believed that are one The n times iteration that GetNext is carried out in secondary operation realizes that NMS more efficiently obtains batch data from SNMP agent.Both operations A MIB node instance can be specified in the request message of type, specified when SNMP agent needs to search from the current table of MIB trees When next example of example whether there is, if it is found, then returning to the example;If can not find, next leaf is searched First example of node.When having traversed all leaf nodes of current table and all can not find effective example, then continue to traverse Next table in MIB trees, until finding an effective example.Therefore, for both action types, SNMP agent is logical Often needing continually to traverse MIB trees, MIB traversal of trees method can influence greatly the speed of SNMP agent response NMS requests very much, when When one table middle period number of child nodes is especially more, this can cause bigger algorithm expense.
Invention content
In view of the deficiencies in the prior art, looking into the purpose of the present invention is to provide a kind of Simple Network Management Protocol agency Inquiry method, MIB traversal of tree method and system, it is possible to reduce SNMP agent calculates the GetNext and GetBulk processing asked Method expense promotes response speed of the network equipment for both requests of GetNext and GetBulk.
The present invention provides a kind of querying method of Simple Network Management Protocol agency comprising following steps:
Simple Network Management Protocol SNMP agent receiving network managing system NMS is to being managed in management information bank MIB The request message of the GetNext or GetBulk of object;
When example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current MIB tables First node of next MIB tables begin look for, and return to lookup result, wherein the current MIB tables include at least two A leaf node.
Based on the above technical solution, the object identifier entrained by the request message of the GetNext is corresponding Example is a upper example for the current MIB tables;
Before the corresponding example of object identifier entrained by the request message of the GetBulk is the current MIB tables Continuous N number of example in any one, N >=2.
Based on the above technical solution, the corresponding example of object identifier entrained by the request message is MIB A scalar node for tree.
Based on the above technical solution, the object identifier entrained by the request message of the GetNext is corresponding Example is the last one example of the first MIB tables of MIB trees, the last one example of the first MIB tables is the current MIB tables A upper example;
Any one after example specified by the request message of the GetBulk in continuous N number of example corresponds to institute State first example of first node of current MIB tables, N >=2.
Based on the above technical solution, the object identifier entrained by the request message corresponds to the one of MIB trees A leaf node, leaf node belongs to the 2nd MIB tables, and example is not present in leaf node.
Based on the above technical solution, the object identifier entrained by the request message corresponds to the one of MIB trees A intermediate node, the intermediate node include at least one 3rd MIB tables, and first the 3rd MIB table of the intermediate node is described Current MIB tables.
Based on the above technical solution, when SNMP agent is based on Net-SNMP frames, the current MIB tables are son Subtree structures are set, subtree subtree structures include at least one 4th MIB tables, all leaves of each 4th MIB tables Child node binds identical findVar call back functions;
If example, and the findVar call back functions of current leaf node and a upper leaf is not present in current leaf node When the findVar call back functions of child node are identical, then SNMP agent skips the current MIB tables.
The present invention also provides a kind of MIB traversal of trees methods comprising following steps:
SNMP agent receives request messages of the NMS to the GetNext or GetBulk of the managed object in MIB;
SNMP agent is searched using the querying method that Simple Network Management Protocol described in claim 1 is acted on behalf of, and is returned Lookup result;
Above step is repeated, until traversing MIB trees.
The present invention also provides the inquiry systems of Simple Network Management Protocol agency a kind of, are set in SNMP agent, the system Including:
Receiving module is used for receiving network managing system NMS to the managed object in management information bank MIB The request message of GetNext or GetBulk;
Enquiry module is used to be searched according to the request message, wherein when SNMP agent searched it is current When example being not present in MIB tables, then current MIB tables are skipped, since first node of next MIB tables of current MIB tables It searches, and returns to lookup result, wherein the current MIB tables include at least two leaf nodes.
Based on the above technical solution, when SNMP agent, which is based on Net-SNMP frames, to be realized, the current MIB tables For subtree subtree structures, subtree subtree structures include at least one 4th MIB tables, the institute of each 4th MIB tables There is leaf node to bind identical findVar call back functions;
The enquiry module is used to that example, and the findVar readjustments of current leaf node to be not present in current leaf node In the case of the findVar call back functions of function and a upper leaf node are identical, the current MIB tables are skipped.
Compared with the prior art, the advantages of the present invention are as follows:SNMP agent can be reduced for GetNext and GetBulk The Processing Algorithm expense of request promotes response speed of the network equipment for both requests of GetNext and GetBulk.
Description of the drawings
Fig. 1 is the querying method flow chart of first embodiment of the invention Simple Network Management Protocol agency;
Fig. 2 is the inquiry system schematic diagram of eighth embodiment of the invention Simple Network Management Protocol agency.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 1, first embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, this method Include the following steps:
S110. Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the quilt in management information bank MIB Manage the request message of the GetNext or GetBulk of object.
S120. when example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current First node of next MIB tables of MIB tables is begun look for, and returns to lookup result, wherein current MIB tables include at least Two leaf nodes.
Some MIB nodes include some MIB tables, and a MIB table corresponds to a class object, may include each of the object in table Example, and each attribute of this corresponding class object of each row (leaf node) of MIB tables.I.e. MIB tables are described by row and column, In, list head is the object identifier of leaf node, and row gauge outfit is index index.The object identifier and index of leaf node Value has just uniquely determined an example in MIB tables.The OID of the example is:Arrange OID+index.Shown in table 1, certain A MIB nodes include following 3 MIB tables, wherein in MIB trees, MIB tables 2 are next MIB tables of MIB tables 1, and MIB tables 3 are Next MIB tables of MIB tables 2.MIB tables 1 include leaf node 1 and leaf node 2, and leaf node 1 and leaf node 2 include 3 indexes, i.e. leaf node 1 and leaf node 2 include 3 examples.MIB tables 2 include leaf node 3 and leaf node 4, but It is no any index and corresponding example.MIB tables 3 include leaf node 5, and leaf node 5 includes 1 index, corresponding 1 reality Example.
Table 1:
When SNMP agent receives GetNext request messages, the object identifier of the request message is parsed first, then root Given instance is found in MIB database according to object identifier, finally obtains the next of the corresponding example of the object identifier The numerical value of example, and return to NMS.The corresponding example of object identifier entrained by the request message of GetNext is current MIB A upper example for table.
When SNMP agent receives the request message of GetBulk, the object identifier of the request message is parsed first, then Given instance is found in MIB database according to object identifier, finally obtains the number of N number of next example of the given instance Value, and return to NMS.Since GetBulk operations are the extensions operated for GetNext in SNMPv2 versions, it is believed that be The n times iteration of GetNext is carried out in once-through operation.During an iteration in office, entrained by the request message of GetBulk The corresponding example of object identifier is any one in continuous N number of example before current MIB tables, N >=2.
If any example is not present in current MIB tables, for each node of this table, all there is no effective Example.When searching first example failure of some leaf node of some MIB table, so that it may to skip this MIB table All follow-up leaf nodes directly handle first leaf node of next MIB tables, have thus reached saving-algorithm expense Target, it is possible to reduce the Processing Algorithm expense that SNMP agent asks GetNext and GetBulk promotes the network equipment pair In the response speed of both requests of GetNext and GetBulk.
It is illustrated by taking GetNext request messages and table 1 as an example below, if the MIB tables 2 in table 1 are current MIB tables, When searching first example failure of the leaf node 3 of MIB tables 2, so that it may to skip the leaf node 4 of MIB tables 2, directly handle The leaf node 5 of MIB tables 3 returns to the 1st example of the leaf node 5 of MIB tables 3, due to the leaf section without traversing MIB tables 2 The index of all examples of point 4, has thus reached the target of saving-algorithm expense.
Second embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, and this method includes following step Suddenly:
S210. Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the quilt in management information bank MIB Manage the request message of the GetNext or GetBulk of object.
S220. when SNMP agent receives the request message of GetNext or GetBulk, pair of the request message is parsed As identifier, the corresponding example of object identifier entrained by decision request message is a scalar node for MIB trees, the scalar Node is adjacent with current MIB tables, then SNMP agent is searched in current MIB tables.
S230. when example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current First node of next MIB tables of MIB tables is begun look for, and returns to lookup result, wherein current MIB tables include at least Two leaf nodes.
Third embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, and this method includes following step Suddenly:
S310. Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the quilt in management information bank MIB Manage the request message of the GetNext or GetBulk of object.
S320. when SNMP agent receives the request message of GetNext or GetBulk, pair of the request message is parsed As identifier, the corresponding example of object identifier entrained by decision request message is the last one of the first MIB tables of MIB trees Example, the last one examples of the first MIB tables are a upper example for current MIB tables, then SNMP agent in current MIB tables into Row is searched.
S330. when example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current First node of next MIB tables of MIB tables is begun look for, and returns to lookup result, wherein current MIB tables include at least Two leaf nodes.
Fourth embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, and this method includes following step Suddenly:
S410. Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the quilt in management information bank MIB Manage the request message of the GetNext or GetBulk of object.
S420. when SNMP agent receives the request message of GetNext or GetBulk, pair of the request message is parsed As identifier, the object identifier entrained by decision request message corresponds to a leaf node for MIB trees, and leaf node belongs to 2nd MIB tables, and example is not present in leaf node, next example of the 2nd MIB tables corresponds to first of current MIB tables First example of node.
Or by taking table 1 as an example, if the second leaf node is the leaf node 3 of MIB tables 2, the leaf section of MIB tables 2 is searched When first example index failure of point 3, so that it may to skip the leaf node 4 of MIB tables 2, directly handle the leaf section of MIB tables 3 Point 5 returns to the 1st example of the leaf node 5 of MIB tables 3, due to all examples of the leaf node without traversing MIB tables 2, The target of saving-algorithm expense is thus reached.
S430. when example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current First node of next MIB tables of MIB tables is begun look for, and returns to lookup result, wherein current MIB tables include at least Two leaf nodes.
Fifth embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, and this method includes following step Suddenly:
S510. Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the quilt in management information bank MIB Manage the request message of the GetNext or GetBulk of object.
S520. when SNMP agent receives the request message of GetNext or GetBulk, pair of the request message is parsed As identifier, the object identifier entrained by decision request message corresponds to an intermediate node for MIB trees, the intermediate node packet At least one 3rd MIB tables are included, first the 3rd MIB table of the intermediate node is current MIB tables.
S530. when example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, from current First node of next MIB tables of MIB tables is begun look for, until traversing MIB trees, wherein current MIB tables include at least two A leaf node.
Sixth embodiment of the invention provides a kind of querying method of Simple Network Management Protocol agency, wherein when SNMP agent base When Net-SNMP frames, current MIB tables are subtree subtree structures, and subtree subtree structures include at least one the All leaf nodes of four MIB tables, each 4th MIB tables bind identical findVar call back functions.
If example, and the findVar call back functions of current leaf node and a upper leaf is not present in current leaf node When the findVar call back functions of child node are identical, then SNMP agent skips current MIB tables.
Specifically, subtree subtree structures may include multiple MIB tables, all leaf nodes of each MIB tables are tied up Fixed identical findVar call back functions, all MIB tables of subtree subtree structures can bind identical findVar and return The findVar call back functions of letter of transfer number, all MIB tables can also be different from.
UCD-SNMP software packages are derived from the SNMP software package CMU SNMP 2.1.2.1 of Carnegie Mellon University, by adding The branch schooles state university Davis (University of Califonia atDavis) development and maintenance, in November, 2000 UCD-SNMP Project is gone to be managed by SourceForge (www.sourceforge.net), and is renamed as Net-SNMP, is to flow very much now Capable a SNMP code skeletons.In the code skeleton, each node can bind a findVar readjustment, be joined according to input Several differences realizes the function of first of the node/next effective example, returns to NULL and indicate to search failure.Specific mistake Journey includes:
(1) by comparing the last input parameter and return value for calling findVar in cycle, so that it may to judge whether to send out Raw " searching first example index failure of leaf node ".
(2) Net-SNMP code skeletons do not have the concept of MIB tables in realizing, can be adjacent several MIB tables according to a set pattern A subtree subtree structure is then merged into, so " first leaf node of next table " can not directly be found.It is logical All nodes of the normal same MIB tables can bind identical findVar readjustments and compare current leaf section in traversal when MIB trees Whether the findVar readjustments of point findVar readjustment and a upper leaf node are identical, so that it may to judge that the two leaf nodes are It is no to belong to the same table, it is just directly skipped if being.
On the basis of the above embodiments, seventh embodiment of the invention also provides a kind of MIB traversal of trees method, this traversal Method includes the following steps:
SNMP agent receives request messages of the NMS to the GetNext or GetBulk of the managed object in MIB.
SNMP agent is searched using the querying method that Simple Network Management Protocol described in claim 1 is acted on behalf of, and is returned Lookup result.For the request message of GetNext, next example of finder given instance, for the request report of GetBulk Text, continuous N number of example, N >=2 after finder given instance.
Above step is repeated, until traversing MIB trees.
Eighth embodiment of the invention provides a kind of inquiry system of Simple Network Management Protocol agency, is set in SNMP agent, This system includes receiving module and enquiry module.
Receiving module is for receiving network managing system NMS to the GetNext of the managed object in management information bank MIB Or the request message of GetBulk.
Enquiry module according to request message for being searched, wherein when in the current MIB tables that SNMP agent is searched not There are current MIB tables when example, are then skipped, begun look for from first node of next MIB tables of current MIB tables, and return Return lookup result, wherein current MIB tables include at least two leaf nodes.
When receiving module receives the request message of GetNext or GetBulk, the object identity of the request message is parsed Symbol, enquiry module find given instance according to object identifier in MIB database, obtain next example of the given instance Numerical value, and return to NMS.
The corresponding example of object identifier entrained by the request message of GetNext is a upper example for current MIB tables; The corresponding example of object identifier entrained by the request message of GetBulk is in continuous N number of example before current MIB tables Any one, N >=2.For example, the corresponding example of object identifier entrained by the request message of GetNext is one of MIB trees Scalar node.Alternatively, the corresponding example of object identifier entrained by request message is last of the first MIB tables of MIB trees A example, the last one example of the first MIB tables are a upper example for current MIB tables.Alternatively, pair entrained by request message As identifier correspond to MIB trees a leaf node, which belongs to the 2nd MIB tables, and is not deposited in the leaf node In example.Alternatively, the object identifier entrained by the request message corresponds to an intermediate node for MIB trees, the middle node Point includes at least one MIB tables, and first MIB table of the intermediate node is current MIB tables.
On the basis of eighth embodiment of the invention, ninth embodiment of the invention provides a kind of Simple Network Management Protocol agency's Inquiry system, wherein when SNMP agent, which is based on Net-SNMP frames, to be realized, current MIB tables are subtree subtree structures, Subtree subtree structures include at least one 4th MIB tables, and all leaf nodes of each 4th MIB tables are bound identical FindVar call back functions.
Enquiry module is used to that example, and the findVar call back functions of current leaf node to be not present in current leaf node In the case of identical with the upper findVar call back functions of a leaf node, current MIB tables are skipped.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention Within the scope of.The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.

Claims (10)

1. a kind of querying method of Simple Network Management Protocol agency, which is characterized in that it includes the following steps:
Simple Network Management Protocol SNMP agent receiving network managing system NMS is to the managed object in management information bank MIB GetNext or GetBulk request message;
When example is not present in the current MIB tables that SNMP agent is searched, then current MIB tables are skipped, under current MIB tables First node of one MIB table is begun look for, and returns to lookup result, wherein the current MIB tables include at least two leaves Child node.
2. the querying method of Simple Network Management Protocol agency as described in claim 1, it is characterised in that:The GetNext's asks It is a upper example for the current MIB tables to seek the corresponding example of the object identifier entrained by message;
The corresponding example of object identifier entrained by the request message of the GetBulk is the company before the current MIB tables Continue any one in N number of example, N >=2.
3. the querying method of Simple Network Management Protocol agency as claimed in claim 2, it is characterised in that:The request message is taken The corresponding example of object identifier of band is a scalar node for MIB trees.
4. the querying method of Simple Network Management Protocol agency as claimed in claim 2, it is characterised in that:The request message is taken The corresponding example of object identifier of band be MIB trees the first MIB tables the last one example, the first MIB tables the last one Example is a upper example for the current MIB tables.
5. the querying method of Simple Network Management Protocol agency as described in claim 1, it is characterised in that:The request message is taken The object identifier of band corresponds to a leaf node for MIB trees, and leaf node belongs to the 2nd MIB tables, and in leaf node not There are examples.
6. the querying method of Simple Network Management Protocol agency as described in claim 1, it is characterised in that:The request message is taken The object identifier of band corresponds to an intermediate node for MIB trees, which includes at least one 3rd MIB tables, in this First the 3rd MIB table of intermediate node is the current MIB tables.
7. the querying method of Simple Network Management Protocol as described in claim 1 agency, which is characterized in that the method further includes: When SNMP agent, which is based on Net-SNMP frames, to be realized, the current MIB tables are subtree subtree structures, subtree subtree Structure includes at least one 4th MIB tables, and all leaf nodes of each 4th MIB tables are bound identical findVar and returned Letter of transfer number;
If example, and the findVar call back functions of current leaf node and a upper leaf section is not present in current leaf node When the findVar call back functions of point are identical, then SNMP agent skips the current MIB tables.
8. a kind of MIB traversal of trees method, which is characterized in that it includes the following steps:
SNMP agent receives request messages of the NMS to the GetNext or GetBulk of the managed object in MIB;
SNMP agent is searched using the querying method that Simple Network Management Protocol described in claim 1 is acted on behalf of, and returns to lookup As a result;
Above step is repeated, until traversing MIB trees.
9. a kind of inquiry system of Simple Network Management Protocol agency, is set in SNMP agent, which is characterized in that the system packet It includes:
Receiving module is used for GetNexts of the receiving network managing system NMS to the managed object in management information bank MIB Or the request message of GetBulk;
Enquiry module is used to be searched according to the request message, wherein when the current MIB tables that SNMP agent is searched In be not present example when, then skip current MIB tables, begun look for from first node of next MIB tables of current MIB tables, And return to lookup result, wherein the current MIB tables include at least two leaf nodes.
10. the inquiry system of Simple Network Management Protocol agency as claimed in claim 9, it is characterised in that:When SNMP agent is based on When Net-SNMP frames are realized, the current MIB tables are subtree subtree structures, and subtree subtree structures include at least All leaf nodes of one the 4th MIB table, each 4th MIB tables bind identical findVar call back functions;
The enquiry module is used to that example, and the findVar call back functions of current leaf node to be not present in current leaf node In the case of identical with the upper findVar call back functions of a leaf node, the current MIB tables are skipped.
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CN112069221A (en) * 2020-09-01 2020-12-11 上海华讯网络系统有限公司 SNMP structured query method, system and medium
CN115442201A (en) * 2022-08-09 2022-12-06 武汉烽火技术服务有限公司 Method and equipment for dynamically acquiring EMS data based on SNMP (simple network management protocol) agent
CN115442201B (en) * 2022-08-09 2023-06-23 武汉烽火技术服务有限公司 Method and equipment for dynamically collecting EMS data based on SNMP agent

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