CN101114994A - Method for detecting connectivity of multi-protocol label switching virtual private network - Google Patents
Method for detecting connectivity of multi-protocol label switching virtual private network Download PDFInfo
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Abstract
The invention discloses a connectivity detection method of MPLS VPN. Based on the SNMP agreement, a private MIB library is loaded in a PE device, and the SNMP agent process in the PE device conducts operation on the private MIB library, and the steps comprise that : (a) the user set a Ping parameter at the network management client terminal, and the SNMP agent process in the PE device sets the network element MIB library and transmits the Ping parameter to a business execution module; (b) the business execution module starts up the Ping operation according to the Ping parameter and returns the Ping result to the SNMP agent process to store the result in the MIB library; (c) the SNMP management process of the network management terminal returns the Ping result which is taken from the private MIB library to the network client terminal. The method of the invention can enable the user more conveniently to conduct the VPN business connectivity detection in the VPN business management system.
Description
Technical field
The present invention relates to the data network communications technical field, particularly the method for MPLS VPN detection of connectivity.
Background technology
MPLS (Multi Protocol Label Switch, multiprotocol label switching) technology is that it combines two layer-switching technologies and three layers of route technology well, and a kind of connection-oriented network infrastructure is provided when last hot spot networks technology.MPLS VPN (Virtual Private Network, Virtual Private Network) then is meant Virtual Private Network based on the MPLS technique construction, promptly adopt the MPLS technology, on public ip network, make up the dedicated network of enterprise or specific user colony oneself, realize multi-service broadband connections such as data, voice, image, and in conjunction with correlation techniques such as differentiated services, traffic engineerings, for the user provides high quality services.
The networking mode of MPLS VPN comprises following several assembly as shown in Figure 1:
PE:Provider Edge Router, the backbone network edge router.It is the main body that vpn service is handled.
CE:Customer Edge Router, the user network edge router.Distribution user network route is not handled vpn service, is used for user site (site) is linked to each other with the VPN backbone network.
P:Provider Router, the backbone network core router.This is the backbone network router of a kind of MPLS of support, only is responsible for MPLS and transmits.
MPLS VPN can be divided into two layers and three layers, but it realizes that principle is similar: utilize labeled slots to realize the transparent transmission of user's message in the MPLS network.Wherein outer mark is used for message is delivered to another PE from a PE, sets up LSP (Label Switched Path, label switched path) tunnel in the MPLS network, is called as the Tunnel mark; The internal layer mark is used for distinguishing the difference connection of different VPN, in the MPLS two-layer VPN, be called as VC (Virtual Circuit, virtual circuit) mark then is called as VRF (Virtual Routing Forwarding Instance, Virtual Switch Instance) mark in the MPLS three-layer VPN.
Therefore, the lsp tunnel in the MPLS network is the basis that makes up MPLS VPN, only guarantees just can make concrete vpn service normal operation by the connectedness of the lsp tunnel of Tunnel mark foundation.
In order to detect in the network connectedness of MPLS LSP between each router clearly, RFC4379 (Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures) has clearly proposed LSP Ping function.This function is by analog IC MP (Internet Control MessageProtocol, Internet Control Message Protocol) echo request (echo request message) and echo reply (echo response message) realize a kind of Report of Discrepancy mechanism, can be used for finding and locating network fault.
Its operation principle as shown in Figure 2, when the initial LSP Ping request that to initiate a destination be LSR6 from LSR1 (Label Switched Router, LSR).At first, LSR1 sends the echo request of a MPLS to LSR2, after LSR2 receives this request, message is transmitted,, arrived LSR5 through advancing LSR3, LSR4, then, LSR5 receives this request message, takes out the label of MPLS, gives LSR6 with this echo request message as a common IP bag.At last, LSR6 receives this echo request bag, handles echo request, and the echo reply that returns a MPLS along opposite path wraps to LSR1.
In view of the plurality of advantages of MPLS VPN, the MPLS vpn service is disposed widely and is used in whole network.For can be efficiently, dispose, administer and maintain vpn service easily, patterned vpn service network management system has become very effective means and instrument.The vpn service network management system not only will provide the planning of vpn service, disposes and management function, also needs to provide detection and security function to vpn service.And prior art is not provided at the method for carrying out detection of connectivity in the patterned vpn service network management system as yet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of carrying out the MPLSVPN detection of connectivity in the VPN network management system, can make the user carry out the detection of connectivity of vpn service more easily in the vpn service management system.
In order to address the above problem, the invention provides a kind of method for detecting connectivity of MPLS VPN, based on Simple Network Management Protocol SNMP, in backbone network edge router PE equipment, load privately owned management information bank, SNMP agent process in the PE equipment is operated described Proprietary MIB storehouse, and described multiprotocol label switching is hereinafter to be referred as MPLS, and described Virtual Private Network is hereinafter to be referred as VPN, described management information bank may further comprise the steps hereinafter to be referred as MIB:
(a) user is provided with the Ping parameter at NM client, by the SNMP agent process in the PE equipment network element MIB storehouse is provided with, and the Ping parameter is passed to business execution module;
(b) described business execution module is initiated the Ping operation according to the Ping parameter, obtains returning to the SNMP agent process behind the Ping result, is deposited in the Proprietary MIB storehouse;
(c) the snmp management process of network management service obtains Ping result and returns to NM client from described Proprietary MIB storehouse.
Further, said method also can have following characteristics: described Proprietary MIB storehouse comprises list item that the Ping parameter is set and the list item of preserving Ping result; In the described step (a), described SNMP agent process is provided with the list item that the Ping parameter is set in the Proprietary MIB storehouse; In the described step (b), described Ping result deposits the list item of the preservation Ping result in the Proprietary MIB storehouse in; In the described step (c), described snmp management process is preserved from described Proprietary MIB storehouse in Ping result's the list item and is obtained Ping result.
Further, said method also can have following characteristics: described method is used for graphical vpn service management system.
Further, said method also can have following characteristics: also comprise after step (c): (d) NM client is handled, is organized the result of Ping to be presented on the graphical interfaces of Ping, and/or the result of repeated detection is generated the detection of connectivity report.
Further, said method also can have following characteristics: NM client is made graphic analyses according to the statistical condition that the user sets in advance to Ping result.
Further, said method also can have following characteristics: described step (a) further comprises: (a1) user is provided with the Ping parameter at NM client, NM client carries out legitimacy to the Ping parameter and detects, if parameter is legal, the Ping request after NM client will encapsulate sends to network management service; (a2) after the snmp management process of network management service is received the Ping request, the Ping parameter that obtains is packaged into the snmp protocol message,, the Ping parameter in described Proprietary MIB storehouse is set by mutual with described SNMP agent process; (a3) the SNMP agent process passes to business execution module with the Ping parameter.
Further, said method also can have following characteristics: in the described step (a2), the setting of Proprietary MIB storehouse list item is undertaken by setting operation.
Further, said method also can have following characteristics: described Ping parameter comprises: the number of giving out a contract for a project, overtime duration and the length of giving out a contract for a project of the type parameter of label switched path LSP, Ping detection this time.
Further, said method also can have following characteristics: the described LSP of setting type parameter is a kind of of following situation: if set up LSP with tag distribution protocol, the prefix addresses and the prefix length of forwarding equivalence class then are set, if set up LSP with RSVP, the tunnel Taoist monastic name of MPLS then is set, set up LSP if connect authentication mode, empty chain identifier and destination address that virtual circuit connects authentication then are set with virtual circuit.
Further, said method also can have following characteristics: described step (b) further comprises: (b1) described Service Processing Module judges whether to carry out the Ping operation according to the Ping mode field in the Ping parameter that receives; (b2) after the Ping operation was finished, described Service Processing Module returned the Ping operating result to described SNMP agent process, and described SNMP agent process writes the result in the Proprietary MIB storehouse.
Further, said method also can have following characteristics: described Ping operating result comprises that Ping operation sends the message number, receives message number and two-way time.
Further, said method also can have following characteristics: echo request message and echo response message that described Ping operation is the simulation Internet Control Message Protocol are realized, described echo request message is hereinafter to be referred as echo request, described echo response message is hereinafter to be referred as echo reply, may further comprise the steps: the FEC information under (i) the request LSR carries in echo request message, MPLS LSP Ping message, sequence number and timestamp parameter, and this echo request message is encapsulated as the User Datagram Protoco (UDP) bag, described LSR is hereinafter to be referred as LSR; (ii) described echorequest message by the MPLS forwarded give the target LSR of LSP, MPLS network when handling echorequest message, adopted with this message in the identical forwarding strategy of FEC information that carries; (iii) described target LSR handles echo request message, returns echo reply message and gives the request LSR that sends echorequest message.
Further, said method also can have following characteristics: described operation comprises according to Ping mode field judgement Ping: when the Ping order does not trigger or is provided with, be in Ping operation init state; When the Ping parameter is set, be in Ping operant activity state, be in the parameter that this state can be revised Ping arbitrarily; Setting completed when the Ping triggered parameter, and when needing Ping of beginning, the state that Ping is set is a Ping operation initial state, and the Ping operation that is in this state can not be stopped arbitrarily; When being in Ping operation initial state, execution parameter is resolved and is detected, if parameter is incorrect, then switch to Ping operation disarmed state, show that the Ping operation can not carry out, if parameter is correct, then switch to Ping operational processes state, begin normal Ping and carry out; When Ping is finished, during return results, switch to Ping operation completion status, Ping orders end.
Further, said method also can have following characteristics: in the described step (c), described snmp management process is obtained Ping result following dual mode: described snmp management process is initiatively obtained the execution result of this or Ping operation several times by the SNMP extract operation; Described SNMP agent process returns the Ping execution result to described snmp management process by the snmp trap operation.
Further, said method also can have following characteristics: network management system is that some links are formulated the detection of connectivity task, and being set an execution cycle for each detection task, system regularly carries out LSP Ping operation according to this cycle, collects the result who detects and generates the detection of connectivity form.
The present invention adopted upper strata webmaster platform automatically/the MPLS testing mechanism of customization, conveniently carry out the fault detect of MPLS, for the OAM(Operation Administration Maintenance) of MPLS provides a kind of good technical means that make things convenient for.The present invention is based on snmp protocol, expanded RFC, defined the Proprietary MIB storehouse that does not have regulation among the RFC, by realizing the MIB storehouse of LSP Ping in the SNMP agent process on the PE of MPLS VPN equipment, the LSP link detecting that triggers the multi-user is provided, the testing result inquiry, the regular detection trigger of LSP Ping, functions such as result's statistical analysis, realized in the snmp management process, carrying out the detection of connectivity of MPLSVPN, thereby can make the user in the vpn service management system, carry out the detection of connectivity of vpn service more easily, for patterned vpn service management system provides professional connective detection means.
Description of drawings
Fig. 1 is the networking structure schematic diagram of existing MPLS VPN;
Fig. 2 is the operation principle schematic diagram of existing LSP Ping;
Fig. 3 is the present embodiment system block diagram;
Fig. 4 is that present embodiment is carried out sequence chart based on the LSP Ping detection of connectivity of snmp protocol;
Fig. 5 is the Ping operating process schematic diagram of present embodiment based on snmp protocol;
Fig. 6 is a present embodiment Ping state transition graph.
Embodiment
Describe the concrete enforcement of technical solution of the present invention in detail below in conjunction with accompanying drawing.
With reference to Fig. 3 and Fig. 4, the LSP Ping detection of connectivity that the present invention is based on SNMP (Simple Network ManagementProtocol, Simple Network Management Protocol) agreement is as follows:
(a) in VPN PE equipment, realize LSP Ping MIB (Management Information Base by loading the Proprietary MIB storehouse, management information bank) support in storehouse, the MIB operation of realization standard, this MIB storehouse comprises list item that the Ping parameter is set and the list item of preserving Ping result, and the SNMP agent process in the VPN PE equipment is operated this Proprietary MIB storehouse;
LSP Ping based on snmp protocol at first must realize LSP Ping MIB.Owing to there is not the relevant RFC standard of LSPPing MIB, so LSP Ping MIB is privately owned (private) MIB that designs according to practical application request, be designed to two MIB tables: LSP Ping Set Table (LSP Ping is provided with list item) and LSP Ping Result Table (LSP Ping result queries list item).
LSP Ping Set Table table is the table that is provided with to LSP Ping, create by row this table, can reach and CLI (Command Line Interface, Command Line Interface) the identical effect of configuration, the parameter of Set operation setting Ping by snmp protocol, the business execution module that offers equipment is carried out the Ping operation.LSP Ping Result Table table is the storage list as a result of LSP Ping, the SNMP agent process will be stored in the result of Ping in this table, or can be used as trap and return to the snmp management process or allow the snmp management process initiatively obtain corresponding Ping result data by SNMP get operation.
The software entity of network element external treatment snmp protocol is called as the snmp management process, and the software entity of treatment S NMP agreement is called as the SNMP agent process in the network element.The MIB storehouse provides all management objects of management information just as database table in equipment.In equipment, the operation in MIB storehouse is all finished by the SNMP agent process.
Above-mentioned business execution module comprises OAM (operation, administration and maintenance, Operations, Administration and Maintenance) processing module and agreement, Service Processing Module.The OAM processing module is responsible for command operation and is handled, the main distribution that realizes order, the collection and treatment of execution result.Agreement, Service Processing Module then are the processing of being responsible for finishing professional related protocol, as the processing of ICMP, LDP, mpls protocol/business.The SNMP agent process converts the ping request of operating to OAM operation, and the OAM processing module drives agreement, Service Processing Module (just be distributed to agreement, Service Processing Module is handled) tissue, handles the variety of protocol message then.
(b) user is provided with the Ping parameter at NM client, and is mutual by the snmp management process and the SNMP agent process in the PE equipment of network management service, by the SNMP agent process network element MIB storehouse is provided with, and the Ping parameter is passed to business execution module;
When the user need carry out LSP VPN detection of connectivity, only need LSP Ping parameter to be set on the NM client graphical interfaces and to determine to get final product.NM client will at first detect the parameter of ping, and wrong if user's parameter is provided with, NM client is revised automatically prompting user.After definite parameter was correct, NM client sent to network management service with these parameters, and made the snmp management process to the Ping parameter in PE equipment (network element) the MIB storehouse list item is set by the mutual realization with the SNMP agent process to carry out the Set operation.After being provided with successfully, the SNMP agent process of network element passes to business execution module (beginning to carry out the ping operation) with the Ping parameter;
Its relevant parameter is set specifically to be comprised, at first select the type of LSP, support LDP (Label Distribution Protocol at present, tag distribution protocol) LSP of mode, RSVP (ResourceReservation Protocol, RSVP) TE (Traffic Engineering, traffic engineering) LSP of mode and VCCV (Virtual Circuit Connection Verification, virtual circuit connection authentication) LSP of mode, according to these three types, FEC (the ForwardingEquivalence Class of corresponding LSP is set, forwarding equivalence class) or the vc-id value of the tunnel of RSVP TE (tunnel) or VCCV, the number of giving out a contract for a project that this Ping detects is set then, overtime duration, the basic parameters such as length of giving out a contract for a project.
In the snmp management process, safeguard the execution example (, tens examples can be arranged) of a plurality of LSP Ping simultaneously, to satisfy the detection demand of multi-user, multilink in the real network environment according to the device hardware performance.For the execution example of each LSP Ping, its relevant parameter can be set according to the mode of setting up of MPLS LSP, by being set, Ping command execution state realizes the automatic triggering of Ping measuring ability at last.
(c) this business execution module is initiated the Ping operation according to the Ping parameter, returns to the SNMP agent process after obtaining Ping result, is deposited into the preservation Ping result's in Proprietary MIB storehouse list item;
The Ping operation can be to carry out the Ping operation at the execution example of 1 LSP Ping, also can be to carry out the Ping operation at the execution example of a plurality of LSP Ping.
The business execution module of PE equipment reorganizes all parameters of this Ping, according to RFC4379, constructs corresponding UDP message, inserts the relevant field of FEC, stamps the transmitting time stamp, sends message.Message is forwarded to the last two jump place LSR (for example LSR5 among Fig. 2) by MPLS, transmits the egress LSR (for example LSR6 in Fig. 2) of text delivery to LSP by IP again, organizes corresponding back message using on this egress LSR.Back message using can return by IP network or MPLS network, and after receiving back message using, equipment is by finishing the processing of a message to the OAM process of commands, and result is deposited into the corresponding list item in MIB storehouse.
(d) the snmp management process of network management service obtains Ping result from described Proprietary MIB storehouse, returns to NM client.
Fig. 5 is based on the operating process of snmp protocol Ping operation, and concrete steps are as follows:
Step 510, NM client (comprising work station and web client) be selected VPN on operation interface, chooses detection of connectivity in corresponding menu, ejects the graphical interfaces of Ping;
Step 520, on the Ping interface, import relevant parameters, the parameter that need import depends on the type of the agreement of setting up LSP, for example set up the words of LSP with the LDP agreement, the prefix addresses and the prefix length (prefix addresses and prefix length can be determined a FEC) that just need input FEC, if set up LSP with RSVP, just need the tunnel Taoist monastic name of input MPLS TE etc., if set up LSP, just need vc-id (virtual circuit ID) value and the destination address of input VCCV with the VCCV agreement; In addition, also need general Ping parameter is set, comprise the ping packet length, give out a contract for a project number and information such as overtime, and input information is done the check of validity;
Step 530 by network management system client and service end communication mechanism, sends to network management service after the request encapsulation with Ping;
Step 540, the snmp management process of network management service is after receiving the Ping request that client sends, the SNMP agent process that the parameter that obtains Ping is packaged into snmp protocol message and PE equipment carries out alternately, and the LSP Ping Set Table in PE equipment (network element) MIB storehouse is provided with the parameter of LSP Ping;
Step 550, snmp management process are judged the execution of Ping according to the PingStatus field of LSP Ping Set Table in the MIB storehouse;
Ping status can have several states that are mutually related, for example Ping Init (Ping operates init state), Ping Active (Ping operant activity state), Ping Start (Ping operates initial state), Ping Processing (Ping operational processes state), Ping Completed (Ping operates completion status) and Ping Invalid (Ping operates disarmed state), the mutual conversion of these relations as shown in Figure 6.
Ping Status field can also can be provided with by the SNMP agent process by the setting of snmp management process, and behind the ping EO, state is changed into Completed by the SNMP agent process automatically.Whether the snmp management process can trigger the ping operation with this state, also can come judgment device ping operation to finish by this state.
Step 560, the Ping Start state of Ping Status is a kind of Ping triggering mode, in case it is Ping Start state that the user is provided with Ping Status, then the SNMP agent process begins detected parameters, if parameter is illegal, then enters the disarmed state of ping, otherwise enter Ping Processing state automatically, echo request and the echo reply of beginning analog IC MP carry out the ping operation, and concrete operations are as follows:
1) FEC information, MPLSLSP Ping message under request LSR carries in LSP Ping echo request message are encapsulated into this echo request message in UDP (User Datagram Protoco (UDP)) bag, include sequence number and timestamp parameter simultaneously;
2) in the MPLS network, send;
3) MPLS when handling MPLS LSP Ping request message, adopted with echo request message in the identical forwarding strategy of FEC information that carries;
4) when this message arrives the outlet of LSP, egress LSR (target LSR) is handled (handling according to RFC4379) to this echo request message, verifies whether this LSR is the real outlet (target LSR) of this FEC;
5) target LSR returns to a MPLS echo of the request LSR reply message that sends echo request message along opposite path.
Ping Status state was Ping Active when parameter was set, at this moment can hack ping parameter, when wanting to carry out a ping operation, just state is arranged to ping start, at this moment can not revise the ping parameter, state also changes ping processing automatically at once.
Generally speaking, said ping operation (such as detect on windows the connective order of main frame ping 127.0.0.1) all is that echo request and the echo reply by the ICMP agreement finishes, though and the echo request of MPLS and echo reply have simulated the mode of echo request and the echo reply of ICMP in this step, the difference of the former with the latter is it has adopted udp protocol message (description is arranged) in RFC4379 mode.
Step 570, business execution module is carried out after the Ping operation, obtains the result of Ping, comprises sending the message number and receiving message number and two-way time, business execution module returns to the SNMP agent process, and the SNMP agent process writes results in storage Ping result's the MIB table;
Step 580, the snmp management process is obtained Ping result;
The snmp management process can obtain the result of Ping by dual mode: the one, and managing process is the result of get Ping initiatively, the execution result of Ping order is kept in the specific list item as a result, and the SNMP get (get) of managing process by MIB obtains this or the execution result of Ping (still directly the MIB storehouse being operated by the SNMP agent process) several times easy to operately; The 2nd, the trap of agent process returns, and allows equipment after executing by SNMP trap (trap, the standard operation of a kind of SNMP), automatically execution result is returned.The execution result that returns comprises sending message number, back message using number, coming and going statistical values such as duration of Ping.Whether agent process returns by trap can be by the Trap On Completion field setting among the LSP Ping Set Table.
Step 590 returns to NM client after the snmp management process of network management service obtains Ping result.
Step 600, NM client are handled, are organized the result of Ping to be presented on the interface, present to the user with graph mode intuitively; And the result of repeated detection can be generated the detection of connectivity report, NM client can also be made corresponding graphic analyses to the testing result of LSP Ping according to the statistical condition that the user is provided with, and makes things convenient for user management.
Fig. 6 is a Ping state transition graph of the present invention, and its status change is as follows:
1, when the Ping order does not trigger or is provided with, be in the Init state;
2, when the Ping parameter was set, the state of this Ping was in the Active state, was in the parameter that this state can be revised Ping arbitrarily;
3, setting completed when the Ping triggered parameter, and when needing Ping of beginning, the state that Ping is set is the Start state, and the Ping that is in this state can not be stopped arbitrarily;
4, the Ping order beginning execution parameter that is under the Ping Start state is resolved and testing, and when parameter is illegal (FEC that for example searches does not exist), state switches to the Invalid state, show that Ping can not carry out, begin normal Ping execution otherwise state forwards Processing to;
5, when Ping is finished, during return results, state switches to Completed, and a Ping order finishes.
In addition, the present invention can realize the regular detection trigger of LSP Ping by loading the Proprietary MIB storehouse.Owing to safeguarded the execution example of a plurality of LSP Ping in the SNMP agent process, so network management system can be formulated detection of connectivity task (detection to every link needs a LSP Ping to carry out example) for some links, carrying out example for each in other words all sets parameter at each link, a task execution cycle (for example 10 minutes) is set then, like this in case after starting this detection of connectivity task, system regularly (as 10 minutes) automatically performs these LSP ping execution examples, and the collection that detects got up, present with form and diagrammatic form.
Claims (15)
1. the method for detecting connectivity of a MPLS VPN, based on Simple Network Management Protocol SNMP, in backbone network edge router PE equipment, load privately owned management information bank, SNMP agent process in the PE equipment is operated described Proprietary MIB storehouse, described multiprotocol label switching is hereinafter to be referred as MPLS, described Virtual Private Network is hereinafter to be referred as VPN, and described management information bank may further comprise the steps hereinafter to be referred as MIB:
(a) user is provided with the Ping parameter at NM client, by the SNMP agent process in the PE equipment network element MIB storehouse is provided with, and the Ping parameter is passed to business execution module;
(b) described business execution module is initiated the Ping operation according to the Ping parameter, obtains returning to the SNMP agent process behind the Ping result, is deposited in the Proprietary MIB storehouse;
(c) the snmp management process of network management service obtains Ping result and returns to NM client from described Proprietary MIB storehouse.
2. the method for claim 1 is characterized in that, described Proprietary MIB storehouse comprises list item that the Ping parameter is set and the list item of preserving Ping result; In the described step (a), described SNMP agent process is provided with the list item that the Ping parameter is set in the Proprietary MIB storehouse; In the described step (b), described Ping result deposits the list item of the preservation Ping result in the Proprietary MIB storehouse in; In the described step (c), described snmp management process is preserved from described Proprietary MIB storehouse in Ping result's the list item and is obtained Ping result.
3. method as claimed in claim 1 or 2 is characterized in that, described method is used for graphical vpn service management system.
4. method as claimed in claim 3 is characterized in that, also comprises after step (c):
(d) NM client is handled, is organized the result of Ping to be presented on the graphical interfaces of Ping, and/or the result of repeated detection is generated the detection of connectivity report.
5. method as claimed in claim 3 is characterized in that NM client is made graphic analyses according to the statistical condition that the user sets in advance to Ping result.
6. the method for claim 1 is characterized in that, described step (a) further comprises:
(a1) user is provided with the Ping parameter at NM client, and NM client carries out legitimacy to the Ping parameter and detects, if parameter is legal, the Ping request after NM client will encapsulate sends to network management service;
(a2) after the snmp management process of network management service is received the Ping request, the Ping parameter that obtains is packaged into the snmp protocol message,, the Ping parameter in described Proprietary MIB storehouse is set by mutual with described SNMP agent process;
(a3) the SNMP agent process passes to business execution module with the Ping parameter.
7. method as claimed in claim 6 is characterized in that, in the described step (a2), the setting of Proprietary MIB storehouse list item is undertaken by setting operation.
8. method as claimed in claim 6 is characterized in that, described Ping parameter comprises: the number of giving out a contract for a project, overtime duration and the length of giving out a contract for a project of the type parameter of label switched path LSP, Ping detection this time.
9. method as claimed in claim 8, it is characterized in that, the described LSP of setting type parameter is a kind of of following situation: if set up LSP with tag distribution protocol, the prefix addresses and the prefix length of forwarding equivalence class then are set, if set up LSP with RSVP, the tunnel Taoist monastic name of MPLS then is set, sets up LSP, empty chain identifier and destination address that virtual circuit connects authentication then are set if connect authentication mode with virtual circuit.
10. the method for claim 1 is characterized in that, described step (b) further comprises:
(b1) described Service Processing Module judges whether to carry out the Ping operation according to the Ping mode field in the Ping parameter that receives;
(b2) after the Ping operation was finished, described Service Processing Module returned the Ping operating result to described SNMP agent process, and described SNMP agent process writes the result in the Proprietary MIB storehouse.
11. method as claimed in claim 10 is characterized in that, described Ping operating result comprises that Ping operation sends the message number, receives message number and two-way time.
12. method as claimed in claim 10, it is characterized in that, echo request message and echo response message that described Ping operation is the simulation Internet Control Message Protocol are realized, described echo request message is hereinafter to be referred as echo request, described echo response message may further comprise the steps hereinafter to be referred as echo reply:
(i) FEC information, MPLS LSP Ping message, sequence number and timestamp parameter under the request LSR carries in echo request message, and this echo request message is encapsulated as the User Datagram Protoco (UDP) bag, described LSR is hereinafter to be referred as LSR;
(ii) described echo request message by the MPLS forwarded give the target LSR of LSP, MPLS network when handling echo request message, adopted with this message in the identical forwarding strategy of FEC information that carries;
(iii) described target LSR handles echo request message, returns echo reply message and gives the request LSR that sends echo request message.
13. method as claimed in claim 8 is characterized in that, described operation comprises according to Ping mode field judgement Ping:
When the Ping order does not trigger or is provided with, be in Ping operation init state;
When the Ping parameter is set, be in Ping operant activity state, be in the parameter that this state can be revised Ping arbitrarily;
Setting completed when the Ping triggered parameter, and when needing Ping of beginning, the state that Ping is set is a Ping operation initial state, and the Ping operation that is in this state can not be stopped arbitrarily;
When being in Ping operation initial state, execution parameter is resolved and is detected, if parameter is incorrect, then switch to Ping operation disarmed state, show that the Ping operation can not carry out, if parameter is correct, then switch to Ping operational processes state, begin normal Ping and carry out;
When Ping is finished, during return results, switch to Ping operation completion status, Ping orders end.
14. the method for claim 1 is characterized in that, in the described step (c), described snmp management process is obtained Ping result following dual mode:
Described snmp management process is initiatively obtained the execution result of this or Ping operation several times by the SNMP extract operation;
Described SNMP agent process returns the Ping execution result to described snmp management process by the snmp trap operation.
15. the method for claim 1, it is characterized in that network management system is that some links are formulated the detection of connectivity task, and for each detection task is set an execution cycle, system regularly carries out LSP Ping operation according to this cycle, collects the result who detects and generates the detection of connectivity form.
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