CN101640610A - Method and system for automatic discovery of Ethernet link - Google Patents
Method and system for automatic discovery of Ethernet link Download PDFInfo
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Abstract
The invention discloses a method for automatic discovery of an Ethernet link, the method adds network elements in a network management system and obtains and saves information of the added network elements and the information of ports of the network elements, and the method comprises the steps of obtaining the port which starts an operation, administration and maintenance (OAM) protocol in the origin network element, starting OAM nodes of the ports of the origin network element of the OAM protocol by polling, obtaining a media access control (MAC) address of the opposite network element, searching out the opposite network element according to the MAC address of the opposite network element, ergodic processing the ports in the opposite network element, searching the port of the opposite network element which corresponds to the MAC address of the origin network element and establishing a physical link of the origin network element and the opposite network element according to the obtained port of the origin network and the port of the opposite network element. Accordingly, the invention provides a system for automatic discovery of the Ethernet link, which comprises a network management module and a port management module. Therefore, the method and the system can automatically discover the full-network physical link and present to a user by topology.
Description
Technical field
The present invention relates to network management system, particularly relate to a kind of ethernet link automatic discovering method and system.
Background technology
At present, in the most communications equipment manufacturer webmaster the automatic discovery of ethernet link be based on the IP address promptly three layers of port realize, for example: after adding a network element, three layers of all ports of this network element of webmaster meeting poll, three etale topology networks are presented on the topological diagram, this method can not show the physical connection relation of physical device intuitively, and three layers of port of every establishment, the link topology will change, need to create thousands of three layers of port on the data equipment that has, cause topological link very huge, numerous and diverse.
In the prior art, find automatically, do not support LLDP for the equipment such as switch of low side although Link Layer Discovery Protocol (LLDP, Link Layer Discovery Protocol) also can be used for physical link.In addition, though being arranged, some find the method for network topology automatically, as Chinese patent application number be to propose the method that a kind of network topology is found automatically in the file of " 200410052276.0 ", be regularly to inquire about or collect routing iinformation in its routing table, by described Gateway Network Element routing iinformation reported network management system again by network element reach the standard grade or roll off the production line mode each network element in network of Event triggered inquiry by Gateway Network Element.Yet this patent application is to carry out network topology by routing table to find automatically, can only find the tri-level logic link, can't find two layers of physical link.For Layer 2 switch equipment, if there is not routing table, network topology then can't be found.And,, can not show the physical connection relation of physical device intuitively by the network topology that routing table is found automatically.
And for example, Chinese patent application number is to propose in the file of " 200810216566.2 " a kind ofly to seek two floor link discovery agreement (LLDP) messages by sending in network, and by transmission, processing and forwarding to this message, thereby find and set up the MAC route information table automatically, but this patent application exists equipment must support the LLDP agreement, but a lot of low-end switch equipment are not supported the LLDP agreement, therefore can't find the physical link of the whole network automatically.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of ethernet link automatic discovering method and system, can find the whole network physical link automatically, and topology is presented to the user.
For achieving the above object, the invention discloses a kind of ethernet link automatic discovering method, in network management system, add network element, and obtain, preserve the net element information that added and the port information of network element; This method comprises: obtain the port of open operation management maintenance OAM agreement in the top network element, poll is opened the OAM node of OAM agreement top network element port, obtains opposite end network element media interviews control MAC Address; MAC Address according to the opposite end network element finds the opposite end network element, travels through the port in the network element of opposite end and search to have the opposite end network element port corresponding with top network element MAC Address; According to the above-mentioned top network element port, the opposite end network element port that obtain, set up the physical link of top network element and opposite end network element.
Wherein, the described port that obtains open operation management maintenance OAM agreement in the top network element comprises: search all of the port of top network element, and judge whether to exist the port of opening the OAM agreement, if exist, then poll is opened the relevant OAM node of port of OAM agreement; If there is not the port of opening the OAM agreement, then poll is not opened the port of OAM agreement.
In the said method, the OAM node of described poll unlatching OAM agreement opposite end network element port obtains the opposite end MAC Address and is: adopt the Simple Network Management Protocol snmp polling to open the relevant management information bank MIB node of port of the equipment of OAM agreement, and judge whether to exist port with opposite end MAC Address, if exist, then in the network management data storehouse, search whether there be the opposite end network element corresponding with described opposite end MAC Address according to described opposite end MAC Address; If the opposite end MAC Address is empty, then returns and judge whether to exist other port with opposite end MAC Address.
Wherein, port in the network element of described traversal opposite end is also searched and is had the opposite end network element port corresponding with top network element MAC Address and be: the port information of the opposite end network element all of the port that traversal is preserved, and judge whether to exist corresponding opposite end network element port with top network element MAC Address, if exist, then utilize the opposite end network element port that finds to set up physical link; If there is no, then stop the port of this poll, finish this and find flow process automatically.
In the said method, described after the physical link of setting up top network element and opposite end network element, also comprise: the physical link set up is shown to the user with the form of network element physical connection graph of a relation, for: in by the physical connection figure that calls the generation of link generating function, create and show and newly set up physical link.
In the said method, after the described interpolation network element, also comprise: regularly upgrade and safeguard physical link between each network element, for: the port information of automatic regular polling net element information and/or network element, and upgrade in time net element information and/or port information; According to the variation of net element information and/or port information or the warning information of reported by network elements, upgrade and safeguard the corresponding physical link.
Wherein, this method also comprises: network element is to the network management module report and alarm; Network management module is according to the alarm that reports, and the state of physical link is become the chain rupture state, and with alarm association to corresponding net element.
Correspondingly, the invention provides a kind of ethernet link and find system automatically, comprising: network management module and Port Management module; Wherein, network management module, the net element information that is used to obtain, preserves, regularly upgrades the user and added, obtain the top network element port of unlatching OAM agreement and the opposite end network element of this port, and be used to call port information that the Port Management module preserves and search and have the opposite end network element port corresponding, and be used for according to the above-mentioned top network element port that obtains, the physical link that opposite end network element port is set up top network element and opposite end network element with top network element MAC Address; The Port Management module is used to obtain and preserve the port information of network element.
In the said system, described network management module comprises: net element information unit, forward lookup unit, reverse find unit and link establishment unit; Wherein, net element information unit, the net element information that is used to obtain, preserves, regularly upgrades the user and added; The forward lookup unit is used for obtaining the top network element port of opening the OAM agreement according to the net element information that described network element adding device is preserved, and the opposite end network element of this port; The reverse find unit is used for the opposite end network element that finds according to the forward lookup unit, and the port information preserved of described Port Management module, searches to have the opposite end network element port corresponding with top network element MAC Address; The link establishment unit is used for the top network element port that finds according to the forward lookup unit, the opposite end network element port that the reverse find unit finds, and sets up the physical link of top network element and opposite end network element.
Wherein, described network management module also comprises: topological display unit is used for the physical link that will set up and is shown to the user with the form of topology; And/or the state-maintenance unit is used for regularly upgrading and safeguards physical link between each network element; And/or the alarming processing unit is used for according to the alarm that reports, and the state of physical link is become the chain rupture state, and with alarm association to corresponding net element.
As can be seen from the above technical solutions, the present invention is based on link level ethernet operation management maintenance (OAM, Operation Administration and Maintenance) agreement has realized the automatic discovery of the whole network physical link, and the physical link between the data product is shown intuitively.Because carrying out the topological automatic discovering of whole network based on link level Ethernet OAM agreement is a very effective method.
And, present data equipment such as router, switch, original equipment manufacturers (OEM, OriginalEquipment Manufacturer) equipment etc. is all supported link level Ethernet OAM agreement, be convenient on data equipments such as switch, open the Ethernet OAM protocol function of the overall situation, thereby realize finding automatically that physical link is also fairly simple, convenient.So the present invention finds that the physical link of whole network come out by utilizing the OAM agreement automatically.
In addition; for webmaster; the discovery of the whole network physical link and topology present and have very important significance; because network element and link discovery are the bases of bearer service; webmaster can effectively be managed automatic discovery protection NE Discovery, link discovery and service discovering, is the important indicator of investigating network management function.
Description of drawings
Fig. 1 is an ethernet link automatic discovering method realization flow schematic diagram of the present invention;
Fig. 2 is a network environment schematic diagram of the present invention;
Fig. 3 finds the system configuration schematic diagram automatically for ethernet link of the present invention.
Embodiment
Basic thought of the present invention is: based on link level Ethernet OAM agreement, find the physical link of whole network automatically, and be shown to the user by the mode of graph topology.
Need to prove OAM agreement (IEEE 802.3ah agreement), this OAM agreement has operation, maintenance, the management function of equipment, be an optional sublayer that is used for carrying out link operation, monitoring and fault location in the data link layer, provide such as the indication of far-end chain circuit alarming, remote loopback control etc.These functions can great majority support the full duplex point-to-point or the simulation point-to-point link on finish, do not rely on specific system port.International Telecommunications Union's telecommunication standards group (ITU-T, ITU TelecommunicationStandardization Sector) defines the OAM protocol function:
1) performance monitoring and produce maintenance information is according to these information evaluation stability of network;
2) mode by regular inquiry detects network failure, produces various maintenances and warning information;
3) by dispatching or switch to other entity, guarantee the normal operation of network;
4) fault message is passed to management entity.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.As shown in Figure 1, realization flow schematic diagram for ethernet link automatic discovering method of the present invention, the prerequisite of present embodiment is the function of opening the Ethernet OAM agreement of the overall situation on data equipments such as switch, the OAM agreement in the network element local maintenance media interviews control (MAC, Media Access Control) address table, and by the OAM agreement, be positioned at the opposite end MAC Address of the chain-link automatic finding system searching designated port on the NM server, and then carry out the discovery of physical link, mainly may further comprise the steps:
Wherein, the user adds network element such as network element A, B etc. in network management system, and the net element information that gets access to is saved in the network management data storehouse, is recorded as the net element information table.Record in the described net element information table: element name, version information, MAC Address such as MAC_A, MAC_B, the IP address, mask, network element state, NE type, Simple Network Management Protocol (SNMP, Simple Network Management Protocol) group string etc.After adding network element, the NE management module can be come real-time update net element information table to the information as each network element of poll monitored of being added.For example: at interval, each network element in the topology is carried out poll at regular intervals, to upgrade and the maintenance network meta information table.
Here, the network environment of present embodiment links to each other by physical link between the network element as shown in Figure 2.Wherein, physical link is a bidirectional relationship, the physical link of all network elements of adding is found one by one, and all be same processing method between per two network elements in a plurality of network elements.
Wherein, described chain-link automatic finding system comprises NE management module and Port Management module, chain-link automatic finding system call Port Management module is obtained the port information of network element, and the port information of the network element A, the B that get access to is deposited in the network management data storehouse, is recorded as port information table.Comprise in the described port information table: port title such as Fei_A, Fei_B, port index, port status etc.And, port information by each network element of Port Management module poll comes the real-time update port information table, the MAC table of in real time OAM agreement on the network element being safeguarded is synchronized in the network management data storehouse, for example: obtain the opposite end MAC Address of this network element upper port the MAC table from network element, and correspondence is added in the described port information table to.
Wherein, network element A upper port title and MAC concern that as shown in Table 1 network element B upper port title and MAC relation are as shown in Table 2.
Table one
Table two
Here, with network element A is that top network element, network element B are that the opposite end network element is an example, carry out the forward lookup of OAM agreement physical link: according to whether opening of writing down in the network management data storehouse list item of OAM protocol function, by in all of the port of network element A, searching and judging the port of opening the OAM agreement, as Fei_A.
Need to prove, top network element, opposite end network element are the notion of relativity, be not limited to certain single network element, that is to say, forward lookup is to find the opposite end network element from the top network element, so conversely, if begin forward lookup from the opposite end network element, then original opposite end network element is the top network element, and top network element originally is the opposite end network element.
Here, adopt SNMP as passing through to send the SNMP inquiry packet, the relevant MIB node of port of the equipment of the described unlatching of poll OAM agreement, obtain the MAC Address of opposite end, promptly obtain the opposite end MAC Address such as the MAC_B of described port, and the opposite end MAC Address that is obtained is updated to described port information table according to the feedback data of MIB node.
Wherein,, then return and judge whether to exist other port, promptly find other ports, as judge whether other ports have opposite end MAC Address etc. according to the opposite end MAC Address that writes down in the port information table with opposite end MAC Address if the opposite end MAC Address is empty.
What the operation before this step was carried out is the forward lookup process of chain-link automatic finding.Here, this step is carried out the reverse find of physical link, and network element B has a plurality of ports, and the MAC Address of each port is the same, but has started the opposite equip. that the port of OAM agreement is learnt.In view of the above, all ports among the traversal network element B according to the record such as the above-mentioned table two that are kept in the port information table, are searched the port that the opposite end MAC Address is MAC_A, so, determined that by this method the terminal point of OAM agreement physical link among the network element B is the Fei_B port.
Wherein, as the learnt from each other MAC of opposite end of the port of two network elements opening the OAM agreement, then call physical link between the Fei_B port of the Fei_A port of network element A and network element B and set up function and set up physical link, that is: a Fei_A--Fei_B.And newly-built physical link state is set to connected state.
Here, the physical link set up is shown to the user with the form of physical connection figure, for example: by calling among the physical connection figure that the link generating function generates, create and show line between the Fei_B port of the Fei_A port of newly setting up physical link such as network element A and network element B.
So far, the chain-link automatic finding flow process of present embodiment finishes, and is the state renewal of physical link and the process of safeguarding below, mainly may further comprise the steps:
Here, the maintenance of Ethernet physical link generally realizes by receiving that OAM agreement alarm triggered physical link state that network element such as switch, router etc. report is upgraded.Wherein, the described alarm that reports comprises following four kinds of situations:
1, close (shutdown) port, the opposite end network element can send (dyinggasp) alarm of panting to the NE management module;
2, plug port, bag can timed sending be detected in the physical link two ends, finds that the opposite end does not exist if detect, and then the related network elements administration module sends the alarm of finding to detect failure;
3, the alarm of OAM protocol discovery failure, for example physical link port shutdown the OAM protocol function.The opposite end reports the NE management module;
4, single port remote loopback alarm when in the physical link loop being arranged, can produce the alarm of single port remote loopback.
It is emphasized that, after finishing, physical link foundation also to carry out timing renewal and maintenance, physical link between each network element may change as chain rupture, can adopt above-mentioned chain-link automatic finding method to this, at interval, each network element in the topology is carried out the renewal and the maintenance of physical link at regular intervals.For example: the port information of automatic regular polling net element information and/or network element, and upgrade in time net element information and/or port information; According to the variation of net element information and/or port information or the warning information of reported by network elements, upgrade and safeguard the corresponding physical link.Wherein, described certain hour can also can adopt default time at interval as 10 minutes according to the self-defined setting of user's actual conditions at interval.
For each above-mentioned embodiment, for simple description, so it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.
For realizing said method, the present invention also provides a kind of ethernet link to find system automatically, and as shown in Figure 3, this system comprises:
Network management module is used to obtain, preserves the net element information that regularly upgrades the user and added; Obtain the top network element port of unlatching OAM agreement and the opposite end network element of this port, and be used to call port information that the Port Management module preserves and search and have the opposite end network element port corresponding, and be used for according to the above-mentioned top network element port that obtains, the physical link that opposite end network element port is set up top network element and opposite end network element with top network element MAC Address;
The Port Management module is used to obtain and preserve the port information of network element.
In the said system, described network management module comprises: net element information unit, forward lookup unit, reverse find unit and link establishment unit; Wherein,
The net element information unit, the net element information that is used to obtain, preserves, regularly upgrades the user and added;
The forward lookup unit is used for obtaining the top network element port of opening the OAM agreement according to the net element information that described network element adding device is preserved, and the opposite end network element of this port;
The reverse find unit is used for the opposite end network element that finds according to the forward lookup unit, and the port information preserved of described Port Management module, searches to have the opposite end network element port corresponding with top network element MAC Address;
The link establishment unit is used for the top network element port that finds according to the forward lookup unit, the opposite end network element port that the reverse find unit finds, and sets up the physical link of top network element and opposite end network element.
Wherein, described network management module also comprises:
The topology display unit is used for the physical link that will set up and is shown to the user with the form of topology; And/or,
The state-maintenance unit is used for regularly upgrading and safeguards physical link state between each network element; And/or,
The alarming processing unit is used for according to the alarm that reports, and the state of link is become the chain rupture state, and with alarm association to corresponding net element.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can get final product referring to the associated description of other embodiment.The above only is preferred embodiment of the present invention, just is used for description and interpretation the present invention, is not to be used to limit protection scope of the present invention.Within spirit of the present invention and claim protection range, to any modification that the present invention did, be equal to replacement, all fall into protection scope of the present invention.
Claims (10)
1, a kind of ethernet link automatic discovering method is characterized in that, adds network element in network management system, and obtains, preserves the net element information that added and the port information of network element; This method comprises:
Obtain the port of open operation management maintenance OAM agreement in the top network element, poll is opened the OAM node of OAM agreement top network element port, obtains opposite end network element media interviews control MAC Address;
MAC Address according to the opposite end network element finds the opposite end network element, travels through the port in the network element of opposite end and search to have the opposite end network element port corresponding with top network element MAC Address;
According to the above-mentioned top network element port, the opposite end network element port that obtain, set up the physical link of top network element and opposite end network element.
2, ethernet link automatic discovering method according to claim 1 is characterized in that, the described port that obtains open operation management maintenance OAM agreement in the top network element comprises:
Search all of the port of top network element, and judge whether to exist the port of opening the OAM agreement, if exist, then poll is opened the relevant OAM node of port of OAM agreement;
If there is not the port of opening the OAM agreement, then poll is not opened the port of OAM agreement.
3, ethernet link automatic discovering method according to claim 1 is characterized in that, the OAM node of described poll unlatching OAM agreement opposite end network element port obtains the opposite end MAC Address and is:
Adopt the Simple Network Management Protocol snmp polling to open the relevant management information bank MIB node of port of the equipment of OAM agreement, and judge whether to exist port with opposite end MAC Address, if exist, then in the network management data storehouse, search whether there be the opposite end network element corresponding with described opposite end MAC Address according to described opposite end MAC Address;
If the opposite end MAC Address is empty, then returns and judge whether to exist other port with opposite end MAC Address.
4, ethernet link automatic discovering method according to claim 1 is characterized in that, the port in the network element of described traversal opposite end is also searched and had the opposite end network element port corresponding with top network element MAC Address and be:
The port information of the opposite end network element all of the port preserved of traversal, and judge whether to exist corresponding opposite end network element port with top network element MAC Address, if exist, then utilize the opposite end network element port that finds to set up physical link;
If there is no, then stop the port of this poll, finish this and find flow process automatically.
5, ethernet link automatic discovering method according to claim 1 is characterized in that, and is described after the physical link of setting up top network element and opposite end network element, also comprises:
The physical link set up is shown to the user with the form of network element physical connection graph of a relation, for:
In by the physical connection figure that calls the generation of link generating function, create and show and newly set up physical link.
6, according to each described ethernet link automatic discovering method in the claim 1 to 5, it is characterized in that, after the described interpolation network element, also comprise:
Regularly upgrade and safeguard physical link between each network element, for:
The port information of automatic regular polling net element information and/or network element, and upgrade in time net element information and/or port information; According to the variation of net element information and/or port information or the warning information of reported by network elements, upgrade and safeguard the corresponding physical link.
7, according to each described ethernet link automatic discovering method in the claim 1 to 5, it is characterized in that this method also comprises:
Network element is to the network management module report and alarm;
Network management module is according to the alarm that reports, and the state of physical link is become the chain rupture state, and with alarm association to corresponding net element.
8, a kind of ethernet link is found system automatically, it is characterized in that, comprising: network management module and Port Management module; Wherein,
Network management module, the net element information that is used to obtain, preserves, regularly upgrades the user and added, obtain the top network element port of unlatching OAM agreement and the opposite end network element of this port, and be used to call port information that the Port Management module preserves and search and have the opposite end network element port corresponding, and be used for according to the above-mentioned top network element port that obtains, the physical link that opposite end network element port is set up top network element and opposite end network element with top network element MAC Address;
The Port Management module is used to obtain and preserve the port information of network element.
9, ethernet link according to claim 8 is found system automatically, it is characterized in that, described network management module comprises: net element information unit, forward lookup unit, reverse find unit and link establishment unit; Wherein,
The net element information unit, the net element information that is used to obtain, preserves, regularly upgrades the user and added;
The forward lookup unit is used for obtaining the top network element port of opening the OAM agreement according to the net element information that described network element adding device is preserved, and the opposite end network element of this port;
The reverse find unit is used for the opposite end network element that finds according to the forward lookup unit, and the port information preserved of described Port Management module, searches to have the opposite end network element port corresponding with top network element MAC Address;
The link establishment unit is used for the top network element port that finds according to the forward lookup unit, the opposite end network element port that the reverse find unit finds, and sets up the physical link of top network element and opposite end network element.
10, ethernet link according to claim 9 is found system automatically, it is characterized in that, described network management module also comprises:
The topology display unit is used for the physical link that will set up and is shown to the user with the form of topology; And/or,
The state-maintenance unit is used for regularly upgrading and safeguards physical link between each network element; And/or,
The alarming processing unit is used for according to the alarm that reports, and the state of physical link is become the chain rupture state, and with alarm association to corresponding net element.
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