CN101651571B - Analytic method and equipment for ports - Google Patents
Analytic method and equipment for ports Download PDFInfo
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- CN101651571B CN101651571B CN2009101767749A CN200910176774A CN101651571B CN 101651571 B CN101651571 B CN 101651571B CN 2009101767749 A CN2009101767749 A CN 2009101767749A CN 200910176774 A CN200910176774 A CN 200910176774A CN 101651571 B CN101651571 B CN 101651571B
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Abstract
The invention discloses an analytic method and equipment for ports, a port analytic strategy corresponding to port information stored in an MIB node is accurately determined according to the maximum port number stored in upstream network equipment, and the port information is analyzed, thereby accurately determining a network topological structure, and improving the accuracy of the current network structure information determined by network management equipment.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of port analytic method and equipment.
Background technology
Network topology is a kind of method of expressing cellular logic annexation and physical connection relation, pass through network topology, the network manager is the current operation conditions of awareness network intuitively, accurately the fault in the fixer network is to isolate, and the bottleneck that may exist in the whole network accurately analyzed, thereby transform network targetedly, improve the overall performance of network, therefore, network topology is very important for network management.
For the accuracy that guarantees that network topology is calculated, network management technology can adopt various protocols or technology to carry out the calculating of network topology, and (Spanning Tree Protocol, STP) technology is exactly one of them to Spanning-Tree Protocol.
In network configuration as shown in Figure 1, device A, equipment B and equipment C start STP and calculate, and then above-mentioned network configuration will be blocked a link, thereby it is tree-shaped that network configuration is become.
Suppose to generate the tree priority relationship and satisfy A＞B＞C, then after calculating through STP, device A will become the root of this generations tree, also be simultaneously equipment B and equipment C at the upstream equipment that generates on the tree, the while equipment B becomes the upstream equipment of equipment C.Wherein, topological structure as shown in Figure 2 after STP blocked link.
In Fig. 2, device A, equipment B and equipment C will be unit with self port, remember upstream equipment and port thereof:
Because device A has been the root that generates tree, therefore, device A does not have upstream equipment information.
For equipment B, because its upstream equipment is a device A, therefore, the upstream information that equipment B is preserved is: { [B, e1], [A, e1] }.
For equipment C, because its upstream equipment is device A and equipment B, therefore, the upstream information that equipment C preserves is { [C, e1], [A, e2], { [C, e2], [B, e2] }, above-mentioned information can read by the dot1dStpPortDesignatedPort of BRIDGE-MIB.
The network manager is after the upstream information of collecting device A, equipment B and equipment C, can calculate the connection between device A and the equipment B by the upstream information of B, the upstream information by equipment C calculates the connection between device A and equipment C, equipment B and the equipment C.
STP is defined by 802.1d, but 802.1d has different versions, can not be compatible fully between the new early version.
Such as, 802.1d nineteen ninety standard definition STP port uses two bytes to represent first byte representation port priority, second byte representation port numbers, can only comprise 255 ports according to this definition 802.1d nineteen ninety standard, i.e. 1 maximum port number that byte can be represented.
But along with equipment institute band plate card is more and more, 255 ports are obviously not enough, so, in the 802.1d2004 standard, port definition is revised.The STP port still uses two bytes to represent, preceding 4 bit bit representation port prioritys of first byte, 4 bit positions, back are together with second byte representation port numbers, therefore, 802.1d standard can be supported 4095 ports at most in 2004, i.e. 12 maximum port numbers that the bit position can be represented.Because used data length and type are constant, 802.1d (Management Information Base, MIB) node dot1dStpPortDesignatedPort represents the link Peer-Port for standard in 2004 and the shared same management information bank of nineteen ninety standard.
Above-mentioned definition has brought very big puzzlement to the network management software, because in 802.1d standard in 2004, do not define a MIB node and represent the STP version information, this causes webmastering software when reading dot1dStpPortDesignatedPort, do not know how to resolve port numbers, can not determine to be to use 8 bit positions of nineteen ninety standard parsing to obtain port numbers, also be to use standard in 2004 to resolve 12 bit positions and obtain port numbers.
And if the network management software can not correctly be resolved port information, will cause the network management software to calculate topology information and mistake occur.
Such as, the value of MIB node dot1dStpPortDesignatedPort is 10,000,010 01000000 (binary systems), if according to nineteen ninety standard resolve, the peer port number that obtains link is 128, if resolve according to standard in 2004, the peer port number that obtains link is 576, obviously uses these two results to calculate link and will have very big difference.
In realizing process of the present invention, the applicant finds that there is following problem at least in prior art:
The prior art scheme is only supported up-to-date 802.1d standard, for dot1dStpPortDesignatedPort, directly uses 802.1d standard in 2004 to resolve, and promptly directly resolves back 12 bit positions.
This way should be no problem for 802.1d standard in 2004.
But for 802.1d nineteen ninety standard, if back 4 bit positions of first byte of dot1dStpPortDesignatedPort are that the result of parsing also is correct under 0 the situation entirely.
And if 802.1d nineteen ninety standard is under the situation of configured port priority, if according to existing technical scheme, mistake will appear in the method for directly resolving back 12 bit of dot1dStpPortDesignatedPort, because the port numbers that this account form obtains will be greater than 255.
Therefore, the port analysis protocol standard that existing port analytic technique scheme is followed is unclear, can not guarantee the accuracy that port is resolved.
Summary of the invention
The invention provides a kind of port analytic method and equipment, solve different port parses policy (as, 802.1d nineteen ninety standard and 802.1d standard in 2004 for the parsing definition of dot1dStpPortDesignatedPort) the confusion definition, be that port is resolved and selected suitable port parses policy.
For achieving the above object, one aspect of the present invention provides a kind of port analytic method, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in described each network equipment, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, described method comprises:
The port information of being stored in the upstream network device of described network management device according to the described network equipment obtains the maximum port number that described upstream network device comprises;
When maximum port number that described upstream network device comprised during less than default port number threshold value, described network management device carries out port according to the first port parses policy and resolves, when maximum port number that described upstream network device comprised during more than or equal to default port number threshold value, described network management device carries out port according to the second port parses policy and resolves;
Wherein, the described first port parses policy the maximum port number that can resolve less than the described second port parses policy the maximum port number that can resolve, described port number threshold value equal the described first port parses policy the maximum port number that can resolve.
Preferably, definite method of the upstream network device of the described network equipment is specially:
Described network management device is determined the upstream network device that the described network equipment is connected according to the port information of the upstream network device that is connected with self in the described system that is stored in the described network equipment in described system.
Preferably, the port information of the upstream network device that in the described system that described network management device is stored in according to the described network equipment, is connected with self, when determining upstream network device that the described network equipment is not connected in described system, described network management device determines that the described network equipment is the root node of the generation tree that each network equipment is formed in the described system.
Preferably, described method also comprises:
Described network management device generates the network topology that each network equipment is formed in the described system according to the analysis result of the port that is connected between the annexation of each network equipment in the described system and each network equipment.
Preferably, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, be specially:
Described each network equipment is by the port information of bridging management information bank BRIDGE-MIB storage self;
Described each network equipment is stored the port information of the upstream network device that is connected with self in the described system by management information bank MIB node.
On the other hand, the present invention also provides a kind of network management device, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in described each network equipment, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, described network management device comprises:
Module is set, is used to be provided with the port number threshold value;
Acquisition module is used for the port information stored according to the upstream network device of the described network equipment, obtains the maximum port number that described upstream network device comprises;
Parsing module, be connected with described acquisition module, be used for the maximum port number that comprises when described upstream network device less than described when the set port number threshold value of module is set, carrying out port according to the first port parses policy resolves, or, carry out port according to the second port parses policy and resolve when maximum port number that described upstream network device comprised during more than or equal to default port number threshold value;
Wherein, the described first port parses policy the maximum port number that can resolve less than the described second port parses policy the maximum port number that can resolve, described port number threshold value equal the described first port parses policy the maximum port number that can resolve.
Preferably, described acquisition module also is used for:
By obtaining the port information of the upstream network device that is connected with self in the described system that is stored in the described network equipment, determine the upstream network device that the described network equipment is connected in described system.
Preferably, the port information of the upstream network device that in the described system that described acquisition module is stored in according to the described network equipment, is connected with self, when determining upstream network device that the described network equipment is not connected in described system, described acquisition module determines that the described network equipment is the root node of the generation tree that each network equipment is formed in the described system.
Preferably, described network management device also comprises:
Generation module, be connected with described acquisition module with described parsing module, be used for the analysis result of the port that is connected between each network equipment that annexation and described parsing module according to each network equipment of the determined described system of described acquisition module generated, generate the network topology that each network equipment is formed in the described system.
Preferably, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, be specially:
Described each network equipment is by the port information of bridging management information bank BRIDGE-MIB storage self;
Described each network equipment is stored the port information of the upstream network device that is connected with self in the described system by management information bank MIB node.
Compared with prior art, the present invention has the following advantages:
By using technical scheme of the present invention, can be according to the maximum port number of being stored in the upstream network device, determine the pairing port parses policy of port information that the MIB node is stored accurately, port information is resolved, thereby determine network topology structure accurately, improved the accuracy of the determined current network structural information of network management device.
Fig. 1 is a kind of schematic network structure that prior art proposed;
Fig. 2 is the schematic network structure of a kind of STP of application computational methods that prior art provided;
Fig. 3 is the schematic flow sheet of a kind of port analytic method proposed by the invention;
Fig. 4 is the structural representation of a kind of network management device proposed by the invention.
Embodiment
As stated in the Background Art, can't distinguish the calculative strategy of different STP versions in the existing port parsing scheme at port, thereby can not select correct port parses policy to carry out the parsing of port information, thereby the accuracy of the network topology structure information that influence generates.
Technical scheme of the present invention is according to the maximum port number of upstream network device, determines the port parses policy that port information that corresponding network device links to each other with this upstream network device is complementary, and generates correct port analysis result.
The present invention proposes a kind of port analytic method, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in each network equipment, store respectively in each network equipment self port information and system in the port information of the upstream network device that is connected with self.
As shown in Figure 3, the schematic flow sheet for a kind of port analytic method proposed by the invention specifically may further comprise the steps:
The port information of being stored in step S301, the upstream network device of network management device according to the network equipment obtains the maximum port number that upstream network device comprises.
Wherein, definite method of the upstream network device of the network equipment is specially:
Network management device is determined the upstream network device that the network equipment is connected according to the port information of the upstream network device that is connected with self in the system that is stored in the network equipment in system.
Wherein, the port information of the upstream network device that in the system that network management device is stored in according to the network equipment, is connected with self, when determining upstream network device that the network equipment is not connected in system, network management device determines that the network equipment is the root node of the generation tree that each network equipment is formed in the system.
Step S302, network management device are judged the magnitude relationship of maximum port number that upstream network device comprised and the port number threshold value of presetting.
When network management device is judged maximum port number that upstream network device comprised less than default port number threshold value, execution in step S303;
When network management device is judged maximum port number that upstream network device comprised more than or equal to default port number threshold value, execution in step S304.
Step S303, network management device carry out port according to the first port parses policy and resolve.
Step S304, network management device carry out port according to the second port parses policy and resolve.
Need further be pointed out that, in the description of technique scheme, the first port parses policy the maximum port number that can resolve less than the second port parses policy the maximum port number that can resolve, the port number threshold value equal the first port parses policy the maximum port number that can resolve.
After above-mentioned technical scheme is finished, technical scheme proposed by the invention also further comprises the generative process of network topological information, be specially the analysis result of network management device, the network topology that each network equipment is formed in the generation system according to the port that is connected between the annexation of each network equipment in the system and each network equipment.
In concrete application scenarios, store the port information of self in each network equipment respectively, be specially the port information of each network equipment by BRIDGE-MIB storage self;
The port information of the upstream network device that is connected with self in the storage system respectively in each network equipment is specially the port information of each network equipment by the upstream network device that is connected with self in the management information bank MIB node storage system.
Compared with prior art, the present invention has the following advantages:
By using technical scheme of the present invention, can be according to the maximum port number of being stored in the upstream network device, determine the pairing port parses policy of port information that MIB is stored accurately, port information is resolved, thereby determine network topology structure accurately, improved the accuracy of the determined current network structural information of network management device.
Below, in conjunction with concrete application scenarios, technical scheme proposed by the invention is described.
Because in the prior art, it is the port information of storing each network equipment by MIB node dot1dStpPortDesignatedPort, so, narration for convenience, the explanation of subsequent technology scheme of the present invention specifically describes by the example that resolves to dot1dStpPortDesignatedPort.
In existing technical scheme, mainly be to be undertaken to the parsing of dot1dStpPortDesignatedPort, and concrete algorithm versions comprise 802.1d nineteen ninety standard and 802.1d standard in 2004 by the STP algorithm.
In conjunction with aforesaid technical thought, in concrete application scenarios, be the example of the first port parses policy, and the example that is the second port parses policy with 802.1d standard in 2004 describe with 802.1d nineteen ninety standard.
The version qualification that it is pointed out that above-mentioned regular port parses policy is a kind of preferred exemplifying embodiment of the present invention, and the variation of concrete version does not influence protection scope of the present invention.
Port numbers for the upstream network device that from the dot1dStpPortDesignatedPort of a network equipment, parses, pairing port information is kept among the BRIDGE-MIB table dot1dBasePortTable of this upstream network device, and promptly the port that parses from dot1dStpPortDesignatedPort is the subclass of dot1dBasePortTable.
Therefore, can be by obtain the maximum port numbers that dot1dBasePortTable comprises in upstream network device, confirm should read in the dot1dStpPortDesignatedPort of this network equipment back 8 bit positions still is that back 12 bit obtain corresponding ports information actually.
If the maximum port numbers of obtaining in upstream network device that dot1dBasePortTable comprised is less than 256, then resolve back 8 bit positions of the dot1dStpPortDesignatedPort of this network equipment, otherwise resolve back 12 bit positions of the dot1dStpPortDesignatedPort of this network equipment.
Quoting of so realizing is, if the maximum port numbers of obtaining in upstream network device is less than 256, so, obviously use 8 bit bit representations enough to represent this port, even what opposite equip. used is 802.1d standard in 2004, resolves back 8 bit positions and also can obtain correct port information certainly.
And if the maximum port numbers of obtaining in upstream network device must be used 12 bit positions more than or equal to 256 this moment, otherwise just do not represent correct port information, therefore, resolving back 12 bit positions is correct fully.
Certainly, for 802.1d 1990 standards, maximum port numbers can not surpass 255, if maximum port numbers greater than 255, the network equipment must use 802.1d 2004 standards.
With network shown in Figure 2 is example, if the device A use is 802.1d 2004 standards, maximum port numbers is 500; What equipment B was used is 802.1d 2004 standards, and maximum port numbers is 200; What equipment C used is 802.1d nineteen ninety standard, and maximum port numbers is 100.As follows for reading of the dot1dStpPortDesignatedPort of device A, equipment B and equipment C so with resolving:
The information that dot1dStpPortDesignatedPort in the device A comprises is left intact for empty;
Dot1dStpPortDesignatedPort in the equipment B comprises an information of device A, and the maximum port numbers that reads dot1dBasePortTable on the slave unit A is 500.
Because 500 greater than 255, therefore, the network equipment must use 802.1d 2004 standards, should use back 12 bit positions to resolve for the dot1dStpPortDesignatedPort of corresponding device A on the equipment B, thereby can correctly obtain Peer-Port is e1.
Dot1dStpPortDesignatedPort among the equipment C comprises two information, and one is the port information of device A, and other one is the port information of equipment B:
For the port information of device A, the maximum port numbers that reads dot1dBasePortTable on the slave unit A is 500.
Because 500 greater than 255, therefore, the network equipment must use 802.1d 2004 standards, and the dot1dStpPortDesignatedPort that goes up corresponding device A for equipment C uses back 12 bit positions to resolve, thereby the port that can correctly obtain A is e2.
For the port information of equipment B, the maximum port numbers that reads dot1dBasePortTable on the slave unit B is 200.
Because 200 less than 255, therefore, the network equipment may use 802.1d 1990 standards, and the dot1dStpPortDesignatedPort that goes up corresponding device B for equipment C uses back 8 bit positions to resolve, and the port that therefore can correctly obtain B is e2.
The result who obtains according to said method just can the correct calculation device A, topological relation between equipment B and the equipment C.
Compared with prior art, the present invention has the following advantages:
By using technical scheme of the present invention, can be according to the maximum port number of being stored in the upstream network device, determine the pairing port parses policy of port information that MIB is stored accurately, port information is resolved, thereby determine network topology structure accurately, improved the accuracy of the determined current network structural information of network management device.
Corresponding, in order to realize above-mentioned technical scheme, the present invention also provides a kind of network management device, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in each network equipment, store respectively in each network equipment self port information and system in the port information of the upstream network device that is connected with self.
As Fig. 4, the structural representation for a kind of network management device proposed by the invention specifically comprises:
Module 41 is set, is used to be provided with the port number threshold value;
Acquisition module 42 is used for the port information stored according to the upstream network device of the network equipment, obtains the maximum port number that upstream network device comprises;
In concrete application scenarios, the acquisition module 42 in the network management device:
The port information of the upstream network device that is connected with self in the system that stores by obtaining in the network equipment is determined the upstream network device that the network equipment is connected in system.
Further, the port information of the upstream network device that in the system that acquisition module 42 is stored in according to the network equipment, is connected with self, when determining upstream network device that the network equipment is not connected in system, acquisition module 42 determines that the network equipments are the root node of the generation tree that each network equipment is formed in the system.
Parsing module 43, with acquisition module 42 with module 41 be set be connected, be used for the maximum port number that comprises when upstream network device when the set port number threshold value of module 41 is set, carrying out port according to the first port parses policy resolves, or, carry out port according to the second port parses policy and resolve when maximum port number that upstream network device comprised during more than or equal to default port number threshold value;
Wherein, the first port parses policy the maximum port number that can resolve less than the second port parses policy the maximum port number that can resolve, the port number threshold value equal the first port parses policy the maximum port number that can resolve.
Generation module 44, be connected with acquisition module 42 with parsing module 43, the analysis result that is used for the port that is connected between each network equipment that annexation and parsing module 43 according to acquisition module 42 each network equipment of determined system generated, the network topology that each network equipment is formed in the generation system.
Store respectively in above-mentioned each network equipment self port information and system in the port information of the upstream network device that is connected with self, be specially:
Each network equipment is by the port information of BRIDGE-MIB storage self;
Each network equipment is by the port information of the upstream network device that is connected with self in the MIB node storage system.
Compared with prior art, the present invention has the following advantages:
By using technical scheme of the present invention, can be according to the maximum port number of being stored in the upstream network device, determine the pairing port parses policy of port information that MIB is stored accurately, port information is resolved, thereby determine network topology structure accurately, improved the accuracy of the determined current network structural information of network management device.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) each implements the described method of scene to carry out the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is a preferred schematic diagram of implementing scene, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device of implementing in the scene can be distributed in the device of implementing scene according to implementing scene description, also can carry out respective change and be arranged in the one or more devices that are different from this enforcement scene.The module of above-mentioned enforcement scene can be merged into a module, also can further split into a plurality of submodules.
The invention described above sequence number is not represented the quality of implementing scene just to description.
More than disclosed only be several concrete enforcement scene of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (10)
1. port analytic method, it is characterized in that, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in described each network equipment, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, described method comprises:
The port information of being stored in the upstream network device of described network management device according to the described network equipment obtains the maximum port number that described upstream network device comprises;
When maximum port number that described upstream network device comprised during less than default port number threshold value, described network management device carries out port according to the first port parses policy and resolves, when maximum port number that described upstream network device comprised during more than or equal to default port number threshold value, described network management device carries out port according to the second port parses policy and resolves;
Wherein, the described first port parses policy the maximum port number that can resolve less than the described second port parses policy the maximum port number that can resolve, described port number threshold value equal the described first port parses policy the maximum port number that can resolve.
2. the method for claim 1 is characterized in that, definite method of the upstream network device of the described network equipment is specially:
Described network management device is determined the upstream network device that the described network equipment is connected according to the port information of the upstream network device that is connected with self in the described system that is stored in the described network equipment in described system.
3. method as claimed in claim 2, it is characterized in that, the port information of the upstream network device that in the described system that described network management device is stored in according to the described network equipment, is connected with self, when determining upstream network device that the described network equipment is not connected in described system, described network management device determines that the described network equipment is the root node of the generation tree that each network equipment is formed in the described system.
4. as any described method in the claim 1 to 3, it is characterized in that, also comprise:
Described network management device generates the network topology that each network equipment is formed in the described system according to the analysis result of the port that is connected between the annexation of each network equipment in the described system and each network equipment.
5. the method for claim 1 is characterized in that, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, be specially:
Described each network equipment is by the port information of bridging management information bank BRIDGE-MIB storage self;
Described each network equipment is stored the port information of the upstream network device that is connected with self in the described system by management information bank MIB node.
6. network management device, it is characterized in that, be applied to comprise in the system of a network management device and a plurality of network equipments, comprise a plurality of ports in described each network equipment, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, described network management device comprises:
Module is set, is used to be provided with the port number threshold value;
Acquisition module is used for the port information stored according to the upstream network device of the described network equipment, obtains the maximum port number that described upstream network device comprises;
Parsing module, be connected with described acquisition module, be used for the maximum port number that comprises when described upstream network device less than described when the set port number threshold value of module is set, carrying out port according to the first port parses policy resolves, or, carry out port according to the second port parses policy and resolve when maximum port number that described upstream network device comprised during more than or equal to default port number threshold value;
Wherein, the described first port parses policy the maximum port number that can resolve less than the described second port parses policy the maximum port number that can resolve, described port number threshold value equal the described first port parses policy the maximum port number that can resolve.
7. network management device as claimed in claim 6 is characterized in that, described acquisition module also is used for:
By obtaining the port information of the upstream network device that is connected with self in the described system that is stored in the described network equipment, determine the upstream network device that the described network equipment is connected in described system.
8. network management device as claimed in claim 7, it is characterized in that, the port information of the upstream network device that in the described system that described acquisition module is stored in according to the described network equipment, is connected with self, when determining upstream network device that the described network equipment is not connected in described system, described acquisition module determines that the described network equipment is the root node of the generation tree that each network equipment is formed in the described system.
9. as any described network management device in the claim 6 to 8, it is characterized in that, also comprise:
Generation module, be connected with described acquisition module with described parsing module, be used for the analysis result of the port that is connected between each network equipment that annexation and described parsing module according to each network equipment of the determined described system of described acquisition module generated, generate the network topology that each network equipment is formed in the described system.
10. network management device as claimed in claim 6 is characterized in that, store respectively in described each network equipment self port information and described system in the port information of the upstream network device that is connected with self, be specially:
Described each network equipment is by the port information of bridging management information bank BRIDGE-MIB storage self;
Described each network equipment is stored the port information of the upstream network device that is connected with self in the described system by management information bank MIB node.
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| CN2009101767749A CN101651571B (en) | 2009-09-21 | 2009-09-21 | Analytic method and equipment for ports |
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| US6219703B1 (en) * | 1996-10-31 | 2001-04-17 | Motorola, Inc. | Method and apparatus for constructing a device management information base in a network management station |
| CN1866936A (en) * | 2006-04-29 | 2006-11-22 | 国家数字交换系统工程技术研究中心 | Internal physical device configuration managing method and system for router |
| CN101354695A (en) * | 2008-09-19 | 2009-01-28 | 杭州华三通信技术有限公司 | Method, system and distributed apparatus of communication between processes |
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