CN101043361A - Method and system for SNMP protocol based network management - Google Patents
Method and system for SNMP protocol based network management Download PDFInfo
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- CN101043361A CN101043361A CN 200610061193 CN200610061193A CN101043361A CN 101043361 A CN101043361 A CN 101043361A CN 200610061193 CN200610061193 CN 200610061193 CN 200610061193 A CN200610061193 A CN 200610061193A CN 101043361 A CN101043361 A CN 101043361A
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Abstract
The disclosed network management method based SNMP protocol comprises: setting a SNMP agent to configure public and private IP addresses, while using a function unit to configure the private IP address; according to engine ID or group name in SNMP message, applying the agent to process and transmit the SNMP message for integrated management. This invention is efficient.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of method and system that carries out network management based on snmp protocol.
Background technology
Simple Network Management Protocol SNMP (Simple Network Management Protocol) with its simple and high-efficient characteristics, is widely used in the management of computer network.The framework of SNMP network management as shown in Figure 1, in the SNMP network apparatus management system, SNMP Manager (manager) assists webmaster to finish the work of the whole network of management.SNMP Agent (administration agent) is a kind of special software or firmware, has comprised the information of a particular device and this equipment environment of living in.When a SNMP Agent was installed on the equipment, this equipment just was listed in " management ".SNMP Agent can obtain the relevant informations such as operating condition, device characteristics and system configuration of resident equipment.It similarly is the broker of each managed devices, finishes the information gathering task that SNMP Manager arranges.
SNMP Manager and to operate between the SNMP Agent on the managed device be that snmp protocol by standard communicates, the flow process of network management is as described below:
(1) SNMP Manager is according to operation requests, and the SNMP message that structure is corresponding sends to SNMPAgent;
(2) SNMP Agent resolves the SNMP message of SNMP Manager transmission and allows equipment carry out relevant operation according to content of message, and SNMP Agent structure SNMP response message sends to SNMP Manager then;
(3) result of display operation request behind the SNMP Manager analysis result.
When special incident took place equipment, equipment initiatively produced an alarm, and sends to SNMP Manager by SNMP Agent.
The use of SNMP is very extensive, as the management of functional unit in ATCA (the Advanced Telecom ComputerArchitecture Advanced Telecom Computing Architecture) machine frame.Along with the transition of telecom operators, IT (Information Technology information technology), CT (the Communication Technology communication technology) merge has become trend of the times.In existing ICT (Information CommunicationTechnology Information ﹠ Communication Technology) integration program, a plurality of equipment are integrated in the machine frame, and distinct device is finished different business.Existing standard such as advanced telecom computing framework (ATCA), in this structure, the one or more veneers in machine frame comprise that the application of carrying on the veneer forms an independent functional units.
Be illustrated in figure 2 as and use snmp protocol to carry out the management mode of traditional machine frame, wherein each functional unit is a managed device, SNMP Agent of operation on it, need to use a management ip address (public ip address), then when functional unit is a lot, just need to use a plurality of management ip address, so not only can consume a large amount of public ip address, and do not support unified SNMP user to dispose, a user will have authority on a plurality of equipment, need be configured respectively on a plurality of equipment.
Summary of the invention
The object of the present invention is to provide a kind of method and system that carries out network management based on snmp protocol, be intended to the equipment in the network is carried out the unification of single IP and manage efficiently.
Technical scheme of the present invention comprises:
A kind of method of carrying out network management based on snmp protocol comprises:
The SNMP agency handles and transmits this SNMP message according to the Engine ID in the SNMP message or group's name, finishes the unified management of webmaster to functional unit.
The SNMP agency finds the IP address of corresponding functional unit according to the Engine ID in the SNMP message or group's name, and revises described message source address and destination address, and it is forwarded to corresponding functional unit.
Engine ID equates with the actual engine ID of functional unit, preserves the mapping of actual engine ID, IP address and the version number of functional unit among the SNMP agency.
Engine ID equates with the virtual engine ID of functional unit, preserves the mapping of virtual engine ID, actual engine ID, IP address and the version number of functional unit among the SNMP agency.
Described webmaster also comprises the device view of drawing the SNMP agency, the mode that enters the supporting SNMP network management system of each functional unit self and unified SNMP user's configuration is provided the unified management of functional unit.
View configuration that unified SNMP user configuration comprises provides unified is provided, unified configuration set is provided and/or unified user's configuration is provided.
The SNMP agency determines according to the user name in the SNMP message whether described message is encrypted, if encrypt, then with encryption key described message is decrypted.
The SNMP agency is according to functional unit and SNMP agency, and the described SNMP message of snmp protocol version modify between SNMP agency and the webmaster.
A kind of system that carries out network management based on snmp protocol, comprise functional unit and webmaster, described webmaster manages described functional unit by snmp protocol, also comprise the SNMP agency, described SNMP agency is according to the Engine ID in the SNMP message or group's name, this SNMP message is handled and transmitted, finish the unified management of webmaster functional unit.
Described SNMP agency comprises:
Mapping table, the mapping of the Engine ID of hold function unit or group's name, IP address and version number;
The message receiver module receives the SNMP message from webmaster or functional unit, and obtains user name, Engine ID or group's name in the described message;
The message modified module is revised described message according to the information in the Engine ID in the described message or group's name and the described mapping table;
The message sending module sends to corresponding functional unit or webmaster with amended message.
The invention has the beneficial effects as follows: SNMP the agency provide unified managing I P for each functional unit in the ATCA machine frame, can shield the management ip address of each functional unit in the ATCA machine frame, if the inner private IP address of using of ATCA machine frame then can be saved a lot of public ip address; By shine upon virtual snmpEngineID for snmpEngineID, the problem of avoiding each functional unit snmpEngineID to repeat; For the functional unit of the SNMP V1 in the ATCA machine frame, SNMP V2c, convert SNMPV1, SNMP V2c message the message of SNMP V3 to by the SNMP agency, thereby realize safety management SNMP V1, SNMP V2c functional unit; Support is to the unified management of the NMS user of ACTA machine frame, and the extent of competence of a SNMP NMS user can be one or more functional unit in the ATCA machine frame.
Description of drawings
Fig. 1 is the network management model of SNMP;
Fig. 2 is the management mode of traditional machine frame;
Fig. 3 is the schematic diagram of way to manage of the present invention;
Fig. 4 is the message format of SNMP V3;
Fig. 5 is the schematic diagram of machine frame management of the present invention;
Fig. 6 is the device view that is presented at the webmaster end;
Fig. 7 is the SNMP webmaster schematic diagram of each functional unit.
Fig. 8 is the view configuration schematic diagram of the embodiment of the invention.
Fig. 9 is the configuration set schematic diagram of the embodiment of the invention.
Figure 10 is user's configuration schematic diagram of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 3, the present invention increases SNMP agency between webmaster and functional unit, SNMP proxy configurations public ip address and private IP address, functional unit configuration private IP address, the SNMP agency is according to the Engine ID in the SNMP message or group's name, this SNMP message is handled and transmitted, finish the unified management of webmaster functional unit.
First embodiment:
The invention provides a kind of method of carrying out network management based on snmp protocol, the realization flow of first embodiment is as follows:
S11, webmaster are acted on behalf of the SNMP message that sends reference format to SNMP, as shown in Figure 4, are the message format of SNMPV3, and Engine ID wherein (contextEngineID) equates with the actual engine ID (snmpEngineID) of the functional unit that this message will be managed;
S12, SNMP agency handles and is transmitted to functional unit according to described Engine ID to described message, and this step specifically comprises:
S121, SNMP agency receives this message, and obtains Engine ID from message;
S122, SNMP agency finds the IP address of corresponding functional unit according to the Engine ID that obtains, remain with the Engine ID of functional unit and the mapping of IP address among the SNMP agency, so, just can find the IP address of corresponding functional unit according to the Engine ID in the message (equating) with the Engine ID of functional unit;
S123, SNMP agency changes the source IP address of message into IP address that SNMP acts on behalf of, and purpose IP address changes the IP address of this functional unit into, and is transmitted to this functional unit;
S13, functional unit are issued the SNMP agency with the SNMP response message;
S14, SNMP agency changes the source IP address of response message into IP address that SNMP acts on behalf of, and purpose IP address changes the IP address of webmaster into, and is transmitted to webmaster.
When for equipment special incident taking place, the same step S14 of processing procedure of the alarm that equipment initiatively produces (SNMP Trap) message does not repeat them here.
Second embodiment:
In the second embodiment of the present invention, the SNMP agency distributes a virtual engine ID (virtual snmpEngineID) for each functional unit, thereby avoid the possible repetition of actual engine ID (snmpEngineID) between the functional unit, the realization flow of this embodiment is as follows:
S21, webmaster are acted on behalf of the SNMP message that sends reference format to SNMP, and Engine ID wherein (contextEngineID) equates with the virtual engine ID (virtual snmpEngineID) of the functional unit that this message will be managed;
S22, SNMP handle and are transmitted to functional unit according to described Engine ID to described message, and this step specifically comprises:
S221, SNMP agency receives this message, and obtains Engine ID from message;
S222, SNMP agency finds the IP address of corresponding functional unit according to the Engine ID that obtains, remain with virtual engine ID, the actual engine ID of functional unit and the mapping of IP address among the SNMP agency, so, just can find the IP address of corresponding functional unit according to the Engine ID in the message (equating) with the virtual engine ID of functional unit;
S223, SNMP act on behalf of the actual engine ID that the Engine ID of message is changed into functional unit, and source IP address changes SNMP agency's IP address into, and purpose IP address changes the IP address of this functional unit into, and is transmitted to this functional unit;
S23, functional unit are issued the SNMP agency with the SNMP response message, and the Engine ID of this response message is the actual engine ID of this functional unit;
S24, SNMP act on behalf of the virtual ID that the Engine ID of response message is changed into functional unit, and source IP address changes SNMP agency's IP address into, and purpose IP address changes the IP address of webmaster into, and is transmitted to webmaster.
When for equipment special incident taking place, the same step S24 of processing procedure of the alarm that equipment initiatively produces (SNMP Trap) message does not repeat them here.
The 3rd embodiment:
Because SNMP V3 can be to message encryption, can not encrypt yet, so, when the third embodiment of the present invention is received the message of webmaster transmission the SNMP agency, want to determine according to the user name (as the msgUserName among Fig. 4) of message whether this message is encrypted earlier, if finding has encryption, then message is decrypted with encryption key, carry out the step of first embodiment or second embodiment after the acquisition expressly again; When SNMP agency receives the response message of functional unit or active alarm message (message of this moment is non-encrypted message), it is carried out the modification of first embodiment or second embodiment after, encrypt and send to webmaster again.
The 4th embodiment:
User can belong to the group (configuration of existence group among the SNMP agency) among a plurality of snmpEngineID (being a plurality of functional units), use identical authentication and encryption key when using this user name to visit all affiliated snmpEngineID of this user (i.e. all functions unit under this user), the safe class of all functions unit in the safe class decision group of group, when then the SNMP agency receives the message of webmaster transmission, the SNMP agency searches corresponding group according to the user name of message, safe class according to group determines whether this message is encrypted, message is decrypted with encryption key if encrypt, carries out the step of first embodiment or second embodiment after the acquisition expressly again; When SNMP agency receives the response message of functional unit or active alarm message (message of this moment is non-encrypted message), it is carried out the modification of first embodiment or second embodiment after, encrypt and send to webmaster again.
Between functional unit and SNMP act on behalf of in the foregoing description, and the supervisory communications agreement between SNMP agency and the webmaster all is SNMP V3, but between functional unit and SNMP act on behalf of among the present invention, and the supervisory communications agreement between SNMP agency and the webmaster can be all SNMP versions such as SNMP V1, SNMP V2c, SNMP V3.
Among the present invention if the supervisory communications agreement between functional unit and the SNMP agency is SNMP V1 or SNMP V2c, supervisory communications agreement between SNMP agency and the webmaster is SNMP V3, then the SNMP agency also needs to convert the administrative message of SNMP V3 to SNMP V1 or SNMP V2c message, and convert response message or the active alarm message of SNMP V1 or SNMP V2c to SNMP V3 message, and, what preserve in the SNMP agency is Engine ID, the mapping of functional unit group name (community, group's name and the Engine ID in the SNMP V3 message in SNMP V1 or the SNMP V2c message are similar) and functional unit IP address.
Among the present invention if between functional unit and the SNMP agency, and the supervisory communications agreement between SNMP agency and the webmaster all is SNMP V1 or SNMP V2c, so just E-Packet, preserve the group's name of functional unit and the mapping of IP address among the SNMP agency by the group's name in the message.
Among the present invention if the supervisory communications agreement between functional unit and the SNMP agency is SNMP V3, supervisory communications agreement between SNMP agency and the webmaster is SNMP V1 or SNMP V2c, the SNMP agency also needs to convert the administrative message of SNMP V1 or SNMP V2c to SNMP V3 message so, and converts the response message of SNMP V3 to SNMP V1 or SNMP V2c message.
Webmaster of the present invention also comprises the unified management of functional unit:
Drafting SNMP agency's device view (as shown in Figure 5, at webmaster: whole ATCA machine frame is a virtual equipment, the SNMP agency is exactly the logic supplier of this virtual unit), such as when the keeper adds equipment, can require the keeper to import customer parameter, connect with the SNMP agency then, and the relevant information of collecting all functions unit to SNMP agency, and according to device view of these information draftings, as shown in Figure 6, this figure is presented at the webmaster end, wherein a functional unit in each box indicating ATCA machine frame;
The mode that enters the supporting SNMP network management system of each functional unit self is provided, each functional unit self has supporting SNMP webmaster, as shown in Figure 7, a functional unit in each square frame corresponding A TCA machine frame, the right is the SNMP webmaster application program of each functional unit correspondence, when user's pointing device, enter SNMP network management system corresponding to this functional unit;
Unified SNMP user's configuration comprises the view configuration that provides unified, unified configuration set is provided, unified user's configuration etc. is provided:
As shown in Figure 8, Fig. 8 is unified view configuration schematic diagram.
A view can comprise different MIB (the Management Information Base management information bank) subtree of a plurality of snmpEngineID (being a plurality of functional units).Webmaster can send two snmp management configuration messages and finish configuration distributing respectively, and destination address is the SNMP agency:
The information that comprises in the message 1:＜snmpEngineID1 (being included in the header),
Read view (view type), " test " (view Name is " test "),
1(Included?oid),
1.0.8802.1(Excluded)>
The information that comprises in the message 2:＜snmpEngineIDn (being included in the header),
Read view (view type), " test " (view Name is " test "),
1(Included?oid),
1.0.8802.1(Excluded)>
Be equivalent to earlier by name for view of snmpEngineID1 (being functional unit 1) configuration " test ", the Included node is 1, the Excluded node is the view of reading of 1.0.8802.1, and is by name for view of snmpEngineIDn (being functional unit n) configuration again " test ", the Included node is 1, the Excluded node is the view of reading of 1.0.8802.1;
As shown in Figure 9, Fig. 9 is unified configuration set schematic diagram.
When disposing a group, this group can belong to a plurality of snmpEngineID (being a plurality of functional units), corresponding to certain snmpEngineID (being certain functional unit), the read-write view that can comprise this functional unit, all snmpEngineID (being all functions unit) under this group use identical level of security.Webmaster can send two snmp management configuration messages and finish configuration distributing respectively, and destination address is the SNMP agency:
The information that comprises in the message 1:＜snmpEngineID1 (being included in the header),
"test"(group?Name?is“test"),
"Read?MIB?View?1"(snmpEngineID?1's?Read?MIB
View),""(snmpEngineID?1's?Write?MIB?View),
Authentication?and?unencryption(Security?Level)>
The information that comprises in the message 2:＜snmpEngineIDn (being included in the header),
"test"(group?Name?is"test"),
"Read?MIB?View?2"(snmpEngineIDn's?Read?MIB
View),"Write?MIB?View?1"(snmpEngineIDn's?Write
MIB?View),
Authentication?and?unencryption(Security?Level)>
Be equivalent to earlier for group name of snmpEngineID1 (being functional unit 1) configuration for " test ", read view for " Read MIB View 1 ", to write view be the group of Authentication and unencryption for " ", level of security, again for group name of snmpEngineIDn (being functional unit n) configuration for " test ", read view for " ReadMIB View 2 ", to write view be the group of Authentication andunencryption for " Write MIB View 1 ", level of security;
As shown in figure 10, Figure 10 is unified user's configuration schematic diagram.
User can belong to the group among a plurality of snmpEngineID (being a plurality of functional units), uses identical authentication and encryption key when using this user name to visit all snmpEngineID (i.e. all functions unit under this user) under this user.Webmaster can send two snmp management configuration messages and finish configuration distributing respectively, and destination address is the SNMP agency:
The information that comprises in the message 1:＜snmpEngineID1 (being included in the header),
"test"(user?Name?is?test),
"group?Name?1"(snmpEngineID?1's?group?Name),
authentication?algorithm?1(snmpEngineID?1's
authentication?algorithm),
"234567"(snmpEngineID?1's?authentication?privacy),
encryption?algorithm?2(snmpEngineID?1's?encryption
algorithm),
"123456"(snmpEngineID1's?encryption?privacy)>
The information that comprises in the message 2:＜snmpEngineIDn (being included in the header),
"test"(user?Name?is?test),
"group?Name?2"(snmpEngineIDn's，oup?Name),
authentication?algorithm?1(snmpEngineIDn's
authentication?algorithm),
"234567"(snmpEngineIDn's?authentication?privacy),
encryption?algorithm?1(snmpEngineIDn's?encryption
algorithm),
"123456"(snmpEngineIDn's?encryption?privacy)>
Be equivalent to by name for user of snmpEngineID1 (being functional unit 1) configuration earlier " test ", group name is group Name 1, identifying algorithm is authentication algorithm 1, authenticate key is " 234567 ", cryptographic algorithm is encryption algorithm 2, encryption key is the user of " 123456 ", and is by name for user of snmpEngineIDn (being functional unit n) configuration again " test ", group name is group Name2, identifying algorithm is authentication algorithm 1, authenticate key is " 234567 ", cryptographic algorithm is encryption algorithm 2, encryption key is the user of " 123456 ".
If newly added a functional unit, need on SNMP agency, increase the snmpEngineID (SNMPV3) of this functional unit or group's name (SNMPV1 or SNMPV2c), SNMP initial user information.If SNMP V3 functional unit, the mapping of then setting up this functional unit IP address, this functional unit snmpEngineID, virtual snmpEngineID, SNMP version number; If SNMPV1 or SNMPV2c functional unit, the mapping of then setting up this functional unit IP address, this functional unit group name, virtual snmpEngineID, SNMP version number.
The present invention also provides a kind of system that carries out network management based on snmp protocol, comprise functional unit and webmaster, described webmaster manages described functional unit by snmp protocol, described system also comprises the SNMP agency, described SNMP agency is according to the Engine ID in the SNMP message or group's name, this SNMP message is handled and transmitted, finish the unified management of webmaster functional unit.
Described SNMP agency comprises:
Mapping table, the mapping of the Engine ID of hold function unit or group's name, IP address and version number;
The message receiver module receives the SNMP message from webmaster or functional unit, and obtains user name, Engine ID or group's name in the described message;
The message modified module is revised described message according to the information in the Engine ID in the described message or group's name and the described mapping table;
The message sending module sends to corresponding functional unit or webmaster with amended message.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of method of carrying out network management based on snmp protocol is characterized in that, comprising:
The SNMP agency handles and transmits this SNMP message according to the Engine ID in the SNMP message or group's name, finishes the unified management of webmaster to functional unit.
2, a kind of method of carrying out network management based on snmp protocol as claimed in claim 1, it is characterized in that, the SNMP agency finds the IP address of corresponding functional unit according to the Engine ID in the SNMP message or group's name, and revise described message source address and destination address, it is forwarded to corresponding functional unit.
3, a kind of method of carrying out network management based on snmp protocol as claimed in claim 1 is characterized in that, Engine ID equates with the actual engine ID of functional unit, preserves the mapping of actual engine ID, IP address and the version number of functional unit among the SNMP agency.
4, a kind of method of carrying out network management based on snmp protocol as claimed in claim 1, it is characterized in that, Engine ID equates with the virtual engine ID of functional unit, preserves the mapping of virtual engine ID, actual engine ID, IP address and the version number of functional unit among the SNMP agency.
5, a kind of method of carrying out network management based on snmp protocol as claimed in claim 1, it is characterized in that described webmaster also comprises the device view of drawing the SNMP agency, the mode that enters the supporting SNMP network management system of each functional unit self and unified SNMP user's configuration are provided the unified management of functional unit.
6, a kind of method of carrying out network management based on snmp protocol as claimed in claim 5 is characterized in that, view configuration that unified SNMP user configuration comprises provides unified is provided, unified configuration set is provided and/or unified user's configuration is provided.
7, a kind of method of carrying out network management based on snmp protocol as claimed in claim 1, it is characterized in that, the SNMP agency determines according to the user name in the SNMP message whether described message is encrypted, if encrypt, then with encryption key described message is decrypted.
8, a kind of method of carrying out network management based on snmp protocol as claimed in claim 2 is characterized in that, the SNMP agency is according to functional unit and SNMP agency, and the described SNMP message of snmp protocol version modify between SNMP agency and the webmaster.
9, a kind of system that carries out network management based on snmp protocol, comprise functional unit and webmaster, described webmaster manages described functional unit by snmp protocol, it is characterized in that, also comprise the SNMP agency, described SNMP agency handles and transmits this SNMP message according to the Engine ID in the SNMP message or group's name, finishes the unified management of webmaster to functional unit.
10, a kind of system that carries out network management based on snmp protocol as claimed in claim 9 is characterized in that, described SNMP agency comprises:
Mapping table, the mapping of the Engine ID of hold function unit or group's name, IP address and version number;
The message receiver module receives the SNMP message from webmaster or functional unit, and obtains user name, Engine ID or group's name in the described message;
The message modified module is revised described message according to the information in the Engine ID in the described message or group's name and the described mapping table;
The message sending module sends to corresponding functional unit or webmaster with amended message.
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| CNB2006100611937A CN100502312C (en) | 2006-06-16 | 2006-06-16 | Method and system for SNMP protocol based network management |
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| CN101567814B (en) * | 2009-05-22 | 2011-03-30 | 清华大学 | Automatic network management method based on SNMP and stochastic Petri net |
| CN101662391B (en) * | 2009-09-25 | 2011-08-17 | 迈普通信技术股份有限公司 | SNMPv3-based cluster management method of Ethernet switches |
| CN102209002A (en) * | 2011-07-21 | 2011-10-05 | 迈普通信技术股份有限公司 | Simple network management protocol (SNMP) network management system and SNMP request processing method |
| CN101800664B (en) * | 2010-02-25 | 2012-05-02 | 迈普通信技术股份有限公司 | Mutual exclusion access method based on SNMP and system and member equipment |
| CN103401859A (en) * | 2013-07-29 | 2013-11-20 | 华为技术有限公司 | Protocol conversion method and protocol converter |
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| CN101662391B (en) * | 2009-09-25 | 2011-08-17 | 迈普通信技术股份有限公司 | SNMPv3-based cluster management method of Ethernet switches |
| CN101800664B (en) * | 2010-02-25 | 2012-05-02 | 迈普通信技术股份有限公司 | Mutual exclusion access method based on SNMP and system and member equipment |
| CN102209002A (en) * | 2011-07-21 | 2011-10-05 | 迈普通信技术股份有限公司 | Simple network management protocol (SNMP) network management system and SNMP request processing method |
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| CN103401859A (en) * | 2013-07-29 | 2013-11-20 | 华为技术有限公司 | Protocol conversion method and protocol converter |
| CN103401859B (en) * | 2013-07-29 | 2016-08-10 | 华为技术有限公司 | A kind of method of protocol conversion and protocol converter |
| CN104125097A (en) * | 2014-07-29 | 2014-10-29 | 瑞斯康达科技发展股份有限公司 | Management control communication method and equipment |
| CN105262625A (en) * | 2015-10-30 | 2016-01-20 | 浪潮(北京)电子信息产业有限公司 | Server virtualization system, management method, management workstation and network system |
| CN110290004A (en) * | 2019-06-27 | 2019-09-27 | 苏州浪潮智能科技有限公司 | A kind of snmp management method, system and computer equipment |
| CN110808862A (en) * | 2019-11-08 | 2020-02-18 | 北京天地和兴科技有限公司 | Method for collecting data of electric power industrial control network equipment based on SNMP protocol |
| CN112866186A (en) * | 2019-11-28 | 2021-05-28 | 大唐移动通信设备有限公司 | Security level determination method and device |
| CN111917856A (en) * | 2020-07-27 | 2020-11-10 | 平安证券股份有限公司 | Mirror image file delivery method and related equipment |
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