CN101877675B - Cross-domain BGP policy adjustment and control effect estimation method and device VTGCS - Google Patents
Cross-domain BGP policy adjustment and control effect estimation method and device VTGCS Download PDFInfo
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Abstract
The invention provides a cross-domain border gateway protocol (BGP) policy adjustment and control effect estimation method and a cross-domain BGP policy adjustment and control effect estimation device VTGCS. An independent VTGCS allocated in each autonomous system is interconnected with a core component BGN of a BGP-Grid at the autonomous system to automatically generate, intercept, capture and process a virtual flow data packet as required; and the virtual flow data packet is processed and forwarded through the BGN of the autonomous system and the BGN of other related autonomous systems, so that the simulation and the estimation of the adjustment effect of an inter-domain interconnection routing policy of a real internet are finished together.
Description
Technical field
The present invention relates to networking technology area, particularly relate to a kind of cross-domain BGP policy regulating effect appraisal procedure and device VTGCS.
Background technology
Independently network association of Autonomous Domain (Autonomous System) conduct, has formed Global Internet jointly by interconnection each other.What the interconnection between Autonomous Domain mainly adopted is BGP (BorderGateway Protocol) Routing Protocol, it is (inter-domain) Routing Protocol between a kind of territory based on strategy (policy), by disposing the Routing Information Exchange between routing policy control domain, and then realize guiding and the orientation to cross-domain user data traffic.
But due to the relative independentability of Autonomous Domain, each Autonomous Domain all can be for self-demand or regulation and self-defining dispose specific routing policy, and the routing policy of Autonomous Domain inside is normally confidential.Therefore, this will have a negative impact to the cross-domain user data traffic of the arrival from other Autonomous Domain or this Autonomous Domain of approach, make it arrive object network according to the path of optimizing (or expection), and due to the non-transparency of routing policy, also make the cooperation regulation and control of intra domain routing policy be difficult to realize, thereby reduce the forward efficiency of cross-domain user data traffic, affect the overall operation performance of Global Internet.In addition,, in the deployment and enforcement of routing policy, because the coverage of routing policy is larger, a little wrong or careless omission (human factor or tactful non-transparency cause) tends to cause large-area routing issue, produces comparatively serious consequence.
Therefore, need at present the urgent technical problem solving of those skilled in the art to be exactly: how can improve the existing problem of inter-domain routing in prior art, in order to when guaranteeing each Autonomous Domain routing policy independence and non-transparency, effectively reduce the risk that routing policy is adjusted, and improve the cooperation regulation and control efficiency of cross-domain routing policy.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of cross-domain BGP policy regulating effect appraisal procedure and device VTGCS, in order to when guaranteeing each Autonomous Domain routing policy independence and non-transparency, effectively reduce the risk that routing policy is adjusted, and improve the cooperation regulation and control efficiency of cross-domain routing policy.
In order to address the above problem, the invention discloses a kind of cross-domain BGP policy regulating effect appraisal procedure, described method comprises: measure with the node (BGN) of Strategy Simulation platform system (BGP-Grid) and realize interconnection with the distributed BGP route in this Autonomous Domain; Generate specific virtual flow packet, and send to the BGN of this Autonomous Domain; VTGCS, for the intercepted and captured virtual flow packet from the virtual flow generation/Intercept and capture service of other Autonomous Domain device (VTGCS), sends to the BGN of this Autonomous Domain after the processing of reversing; Wherein, described reversion processing refers to exchange source and destination address, and completes the filling in other territory of IP packets headers, and in the load of IP grouping, order writes extracted integrated network information recording; For the intercepted and captured virtual flow packet from this Autonomous Domain VTGCS, judge when data packet format is correct, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis;
Described assessment and analysis specifically comprises:
From packet, extract whole integrated network information recordings; And from first group of integrated network information recording, read receiving interface IP address, if the IP address that the GS-Tunnel of this IP address and VTGCS is used belongs to same subnet, according to the form of standard directly perceived, to user, export one by one the whole recorded informations in packet, and finish this Traffic simulation operation;
If the IP address that the GS-Tunnel of this IP address and VTGCS is used does not belong to same subnet, the processing of reversing.
Preferably, described for the intercepted and captured virtual flow packet from this Autonomous Domain VTGCS, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis and is also comprised following sub-step:
Judge when data packet format is incorrect, abandon this packet.
Preferably, realize the intercommunicated GS-Tunnel of mistake complete with the BGN in this Autonomous Domain, the IP address that is different from other Autonomous Domain VTGCS is used in the IP address of interconnection.
The present invention has also announced a kind of cross-domain BGP policy regulating effect apparatus for evaluating VTGCS, and described device comprises:
Virtual flow generation module, be used for generating virtual data on flows bag and the BGN to this Autonomous Domain by the virtual flow Packet Generation generating, also for receiving after the generation request of the virtual flow packet of reversion, exchange source and destination address, and complete the filling in other territory of IP packets headers, in the load of IP grouping, order writes extracted integrated network information recording; Described virtual flow packet comprise be derived from the virtual flow packet of starting of this Autonomous Domain and as requested and generate the virtual flow packet of reversion; Virtual flow is intercepted and captured module, intercepts and captures the virtual flow packet from this Autonomous Domain BGN, and carry out preliminary format checking for being responsible for, and after confirmation data packet format is correct, submits to;
Virtual flow processing module, for with the interface transmission source IP address of virtual flow generation module and object IP address to generate the virtual flow packet that starts accordingly, and receive the virtual flow packet that virtual flow intercepting and capturing module is submitted to, and judgement is extracted and analyzed to its content; Described virtual flow processing module is also responsible for extracted content to transfer to the virtual flow generation module virtual flow packet that is configured to reverse;
Wherein: described assessment and analysis specifically comprises:
From packet, extract whole integrated network information recordings; And from first group of integrated network information recording, read receiving interface IP address, if the IP address that the GS-Tunnel of this IP address and VTGCS is used belongs to same subnet, according to the form of standard directly perceived, to user, export one by one the whole recorded informations in packet, and finish this Traffic simulation operation;
If the IP address that the GS-Tunnel of this IP address and VTGCS is used does not belong to same subnet, the processing of reversing.
Preferably, described virtual flow is intercepted and captured module also for confirming that data packet format abandons this packet after incorrect.
Preferably, described virtual flow generation module gives by general-purpose simulation tunnel (GS-Tunnel) the virtual flow Packet Generation generating the BGN of this Autonomous Domain.
Preferably, described virtual flow is intercepted and captured module and is intercepted and captured the virtual flow packet from this Autonomous Domain BGN from GS-Tunnel.
Compared with prior art, the present invention has the following advantages:
In the each Autonomous Domain of the present invention, lay oneself independently VTGCS with at the BGP-Grid of Autonomous Domain core component BGN, interconnect, automatically generate as required, intercept and capture, process virtual flow packet, virtual flow packet will be processed and be forwarded by Autonomous Domain BGN and other relevant Autonomous Domain BGN, thereby jointly complete emulation and the assessment of the routing policy that interconnects between the territory of true the Internet being adjusted to effect, by the cross-domain flow rate of Reality simulation the Internet, for network operation personnel provide the platform of direct traffic between analysis domain, realize the bi-directional probing of end-to-end hop-by-hop integrated network information, for network operation personnel provide forward and reverse hop-by-hop performance data more comprehensively, the end-to-end hop-by-hop integrated network information of demonstration directly perceived, be convenient to network operation personnel understand cross-domain flow rate through between territory the performance data of interconnection line.
Accompanying drawing explanation
Fig. 1 is the structure chart of a kind of cross-domain BGP policy regulating effect apparatus for evaluating VTGCS described in the embodiment of the present invention one;
Fig. 2 is the flow chart of a kind of cross-domain BGP policy regulating effect appraisal procedure described in the embodiment of the present invention two.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment mono-:
With reference to Fig. 1, show the structure chart of a kind of cross-domain BGP policy regulating effect apparatus for evaluating VTGCS of the present invention, described device VTGCS specifically comprises:
Virtual flow generation module 101, gives the BGN of this Autonomous Domain for generating virtual data on flows bag and by the virtual flow Packet Generation generating; Described virtual flow packet comprise be derived from the virtual flow packet of starting of this Autonomous Domain and as requested and generate the virtual flow packet of reversion;
Preferably, described virtual flow generation module 101 gives by general-purpose simulation tunnel (GS-Tunnel) the virtual flow Packet Generation generating the BGN of this Autonomous Domain.
In each distributed BGP route, measuring with the basic element of Strategy Simulation platform system (BGP-Grid) architecture is that distributed BGP route is measured and Strategy Simulation platform, each Autonomous Domain is laid with oneself independently VTGCS, this VTGCS with at the BGP-Grid of Autonomous Domain core component BGN, interconnect.
The main generation of being responsible for virtual flow packet of virtual flow generation module 101, comprise the generation that is derived from the virtual flow packet of starting of this Autonomous Domain, and according to virtual flow processing module, require the virtual flow packet of reversion generating, and the virtual flow packet generating is sent to the BGN of this Autonomous Domain by GS-Tunnel.
Virtual flow processing module obtains the Traffic simulation request that comprises source IP address and object IP address from user interface, IP address information is passed to virtual flow generation module 101, and submit the generation request of virtual flow packet of starting to, virtual flow generation module 101 is after the generation request of receiving from the virtual flow packet of starting of virtual flow processing module, by transmitting source IP address and the object IP address come, write respectively source address field and the destination address territory in virtual flow packet IP packets headers, and complete the filling in other territory of IP packets headers, the load of IP grouping is set to sky, wherein, virtual flow generation module 101 sends to the virtual flow packet that starts of having constructed the BGN of this Autonomous Domain by GS-Tunnel.
Virtual flow is intercepted and captured module 102, intercepts and captures the virtual flow packet from this Autonomous Domain BGN, and carry out preliminary format checking for being responsible for, and after confirmation data packet format is correct, submits to;
Preferably, described virtual flow is intercepted and captured module 102 and is intercepted and captured the virtual flow packet from this Autonomous Domain BGN from GS-Tunnel.
Preferably, described virtual flow is intercepted and captured module 102 also for confirming that data packet format abandons this packet after incorrect.
Virtual flow is intercepted and captured module 102 and is received and forward from the virtual flow packet of this Autonomous Domain BGN from GS-Tunnel, first packet is carried out to format checking (as the integrality of inspection integrated network information recording and correctness etc.), after confirming that data packet format is errorless, submitted to virtual flow processing module, otherwise abandoned this packet.
Virtual flow processing module, receiving after the virtual flow packet that virtual flow intercepting and capturing module 102 is submitted to, will be extracted whole integrated network information recordings from packet; And from first group of integrated network information recording, read receiving interface IP address, if the IP address that the GS-Tunnel of this IP address and VTGCS is used belongs to same subnet, can determine that this packet is the virtual flow packet being generated by this Autonomous Domain VTGCS, and forward again after the VTGCS reversion via far-end object Autonomous Domain, virtual flow processing module will arrange and to user, export one by one the whole recorded informations in packet according to the form of standard directly perceived, and finishes this Traffic simulation operation; If the IP address that the GS-Tunnel of this IP address and VTGCS is used does not belong to same subnet, can determine that it is the virtual flow packet take this Autonomous Domain as destination address starting from other Autonomous Domain VTGCS, virtual flow processing module will be extracted source IP address and object IP address from the IP packets headers of this virtual flow packet, together with all integrated network information recordings that previously extract, pass to virtual flow generation module 101 from packet, and to virtual flow generation module 101, submit the generation request of the virtual flow packet of reversion to;
Virtual flow generation module 101 is after the generation request of receiving from the virtual flow packet of reversion of virtual flow processing module, by transmitting source IP address and the object IP address come, write respectively destination address territory and the source address field (completing the reversion of source/destination address) in virtual flow packet IP packets headers, and complete the filling in other territory of IP packets headers, in the load of IP grouping, order writes all integrated network information recordings that virtual stream amount processing module passes over, simultaneously, the virtual flow generation module 101 of VTGCS sends to virtual the reversion of having constructed flow packet the BGN of this Autonomous Domain by GS-Tunnel.
Virtual flow processing module 103, for with the interface transmission source IP address of virtual flow generation module 101 and object IP address to generate the virtual flow packet that starts accordingly, and receive the virtual flow packet that virtual flow intercepting and capturing module 102 is submitted to, and judgement is extracted and analyzed to its content.
Preferably, described virtual flow processing module 103 is also responsible for extracted content to transfer to the virtual flow generation module 101 virtual flow packet that is configured to reverse.
Virtual flow processing module 103 can according to network operation personnel's requirement by with the interface transmission source IP address of virtual flow generation module 101 and object IP address to generate the virtual flow packet that starts accordingly, simultaneously, this module also receives the virtual flow packet of submitting to self-virtualizing flow to intercept and capture module 102, by the extraction to virtual flow packet content and analysis, judge, and then this packet recorded contents is exported to network operation personnel, or the extracted content that records is transferred to the virtual flow generation module 101 virtual flow packet that is configured to reverse.
In virtual flow processing module 103, set up user's (being network operation personnel) interface, so that response is from user's Traffic simulation request, and Traffic simulation result (being two-way hop-by-hop integrated network information) is exported to user in mode intuitively; The interface of foundation and virtual flow generation module 101, to transmit generation request and relevant parameter and the data record of the virtual flow packet that starts/reverse to virtual flow generation module 101; Set up the interface of intercepting and capturing module 102 with virtual flow, to receive the virtual flow packet of submitting to after virtual flow is intercepted and captured module 102 format checkings, it is carried out data record extraction and is analyzed after judgement, complete to user's output or the reversion processing to packet.
Each Autonomous Domain has unique VTGCS, and its operation, management, configuration and adjustment are all responsible for voluntarily by this Autonomous Domain, are not subject to the management and control of other Autonomous Domain.VTGCS can independently generate and process virtual flow packet according to this Autonomous Domain network operation personnel's requirement, and meanwhile, each Autonomous Domain VTGCS can work in coordination with and intercept and capture and the virtual flow packet of reversion take its Autonomous Domain as destination.
Between the each functional module of VTGCS, by calling with data-interface of pre-defining, undertaken alternately, jointly realize the functions such as the generation of virtual flow packet, intercepting and capturing, reversion of VTGCS.These functional modules are independent of one another, thereby are convenient to as required, in the situation that not affecting other module, particular module carried out to function adjustment and escalation, have good expandability.
VTGCS can be cross-domain according to need to generating of network operation personnel virtual flow packet, and the BGN that passes to this Autonomous Domain carries out inter-domain routing forwarding, thereby realizes the simulation to the cross-domain flow in true the Internet.
Traditional network test instrument (as traceroute) conventionally can only be realized forward (from source to object) the hop-by-hop network information end to end and survey, and cannot carry out synchronizing detection to reverse (from object to source) hop-by-hop network information.VTGCS is when completing the forward hop-by-hop integrated network information detection of true the Internet, virtual flow packet inversion mechanism by its object Autonomous Domain VTGCS can also complete the effective detection to reverse hop-by-hop integrated network information, thereby realizes the bi-directional probing of the end-to-end hop-by-hop integrated network information to true the Internet.
VTGCS can extract the two-way hop-by-hop integrated network information recording in virtual flow packet, comprise that Autonomous Domain number, receiving interface IP address, circuit point-to-point postpone, the current available bandwidth of circuit, and by them with visual and understandable mode output display to network operation personnel, so that its contrast and assessment to intra domain routing policy regulating effect.
Virtual flow packet encapsulation is on the IP of standard grouping, and source address and the destination address of IP grouping are provided by the virtual flow processing module 103 of VTGCS, and the protocol domain of IP packets headers can be the arbitrary value of non-zero.IP packets headers loading section below comprises 0 or the integrated network information recording of multiple virtual flow packets, each record has 12 bytes, comprises that the circuit point-to-point of the Autonomous Domain number of 4 bytes, the receiving interface IP address of 4 bytes, 2 bytes postpones (unit is millisecond), the current available bandwidth of circuit (unit is Mbps) of 2 bytes.
Embodiment bis-:
With reference to Fig. 2, show the flow chart of a kind of cross-domain BGP policy regulating effect appraisal procedure of the present invention, described method specifically comprises:
S201, measures with the node (BGN) of Strategy Simulation platform system (BGP-Grid) and realizes interconnection with the distributed BGP route in this Autonomous Domain;
Preferably, realize the intercommunicated GS-Tunnel of mistake complete with the BGN in this Autonomous Domain, the IP address that is different from other Autonomous Domain VTGCS is used in the IP address of interconnection.
VTGCS interconnects by the BGN of GS-Tunnel and this Autonomous Domain, and interconnection IP address can freely be selected, and preferably uses the IP address field of this Autonomous Domain or have mark action and be different from the IP address of other Autonomous Domain VTGCS in the present embodiment.
S202, generates specific virtual flow packet, and sends to the BGN of this Autonomous Domain;
S203, for the intercepted and captured virtual flow packet from the virtual flow generation/Intercept and capture service of other Autonomous Domain device (VTGCS), sends to the BGN of this Autonomous Domain after the processing of reversing;
Preferably, described reversion processing refers to exchange source and destination address.
S204, for the intercepted and captured virtual flow packet from this Autonomous Domain VTGCS, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis.
Preferably, described S204 specifically comprises following sub-step:
The virtual flow packet from this Autonomous Domain VTGCS of intercepting and capturing;
Judge when data packet format is correct, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis.
More preferred, described S204 also comprises following sub-step:
Judge when data packet format is incorrect, abandon this packet.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For embodiment of the method, because it is substantially similar to the operation principle of device embodiment, so description is fairly simple, relevant part is referring to the explanation of device embodiment part.
Above a kind of cross-domain BGP policy regulating effect appraisal procedure provided by the present invention and device VTGCS are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (7)
1. a cross-domain BGP policy regulating effect appraisal procedure, is characterized in that, described method comprises:
Measure with the Node B GN of Strategy Simulation platform system BGP-Grid and realize interconnection with the distributed BGP route in this Autonomous Domain;
Virtual flow generation/Intercept and capture service device VTGCS generates specific virtual flow packet, and sends to the BGN of this Autonomous Domain;
For the intercepted and captured virtual flow packet from other Autonomous Domain VTGCS, after the processing of reversing, send to the BGN of this Autonomous Domain; Wherein, described reversion processing refers to exchange source and destination address, and completes the filling in other territory of IP packets headers, and in the load of IP grouping, order writes extracted integrated network information recording;
For the intercepted and captured virtual flow packet from this Autonomous Domain VTGCS, judge when data packet format is correct, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis;
Described assessment and analysis specifically comprises:
From packet, extract whole integrated network information recordings; And from first group of integrated network information recording, read receiving interface IP address, if the IP address that the GS-Tunnel of this IP address and VTGCS is used belongs to same subnet, according to the form of standard directly perceived, to user, export one by one the whole recorded informations in packet, and finish this Traffic simulation operation;
If the IP address that the GS-Tunnel of this IP address and VTGCS is used does not belong to same subnet, the processing of reversing.
2. method according to claim 1, it is characterized in that, described for the intercepted and captured virtual flow packet from this Autonomous Domain VTGCS, the performance parameter that interconnects between the network information that extraction is collected on the way from packet and territory is carried out assessment and analysis and is also comprised following sub-step:
Judge when data packet format is incorrect, abandon this packet.
3. method according to claim 1, is characterized in that:
Realize the intercommunicated GS-Tunnel of mistake with the BGN in this Autonomous Domain and complete, the IP address that is different from other Autonomous Domain VTGCS is used in the IP address of interconnection.
4. the virtual flow generation/Intercept and capture service of a cross-domain BGP policy regulating effect apparatus for evaluating device VTGCS, is characterized in that, described device comprises:
Virtual flow generation module, gives the BGN of this Autonomous Domain for generating virtual data on flows bag and by the virtual flow Packet Generation generating; Described virtual flow packet comprise be derived from the virtual flow packet of starting of this Autonomous Domain and as requested and generate the virtual flow packet of reversion; Receiving after the generation request of the virtual flow packet of reversion, exchange source and destination address, and complete the filling in other territory of IP packets headers, in the load of IP grouping, order writes the integrated network information recording that virtual stream amount processing module is extracted;
Virtual flow is intercepted and captured module, intercepts and captures the virtual flow packet from this Autonomous Domain BGN, and carry out preliminary format checking for being responsible for, and after confirmation data packet format is correct, submits to;
Virtual flow processing module for receiving after the virtual flow packet that virtual flow intercepting and capturing module is submitted to, will be extracted whole integrated network information recordings from packet; And from first group of integrated network information recording, read receiving interface IP address, if the IP address that the general-purpose simulation tunnel (GS-Tunnel) of this IP address and VTGCS is used belongs to same subnet, whole recorded informations in described virtual flow processing module disposal data bag, form according to standard directly perceived is exported one by one to user, and finishes this Traffic simulation operation; If the IP address that the GS-Tunnel of this IP address and VTGCS is used does not belong to same subnet, virtual flow processing module will be extracted source IP address and object IP address from the IP packets headers of this virtual flow packet, together with all integrated network information recordings that previously extract, pass to virtual flow generation module from packet, and to virtual flow generation module, submit the generation request of the virtual flow packet of reversion to;
Wherein: described virtual flow generation module, after the generation request of receiving from the virtual flow packet of reversion of virtual flow processing module, writes respectively destination address territory and the source address field in virtual flow packet IP packets headers by transmitting source IP address and the object IP address come.
5. device VTGCS according to claim 4, is characterized in that:
Described virtual flow is intercepted and captured module also for confirming that data packet format abandons this packet after incorrect.
6. device VTGCS according to claim 4, is characterized in that:
Described virtual flow generation module gives by general-purpose simulation tunnel GS-Tunnel the virtual flow Packet Generation generating the BGN of this Autonomous Domain.
7. device VTGCS according to claim 6, is characterized in that:
Described virtual flow is intercepted and captured module and is intercepted and captured the virtual flow packet from this Autonomous Domain BGN from GS-Tunnel.
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| CN1404268A (en) * | 2002-10-25 | 2003-03-19 | 清华大学 | Simulation method and system for priority protocal of Internet large-scale route to open shortest path |
| CN1859239A (en) * | 2006-06-07 | 2006-11-08 | 北京邮电大学 | Monitoring and analytic system for route between domain of internet and its working method |
| CN101277225A (en) * | 2008-05-09 | 2008-10-01 | 杭州华三通信技术有限公司 | Method for analyzing network quality as well as network quality analysis terminal-initiating equipment |
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| CN1404268A (en) * | 2002-10-25 | 2003-03-19 | 清华大学 | Simulation method and system for priority protocal of Internet large-scale route to open shortest path |
| CN1859239A (en) * | 2006-06-07 | 2006-11-08 | 北京邮电大学 | Monitoring and analytic system for route between domain of internet and its working method |
| CN101277225A (en) * | 2008-05-09 | 2008-10-01 | 杭州华三通信技术有限公司 | Method for analyzing network quality as well as network quality analysis terminal-initiating equipment |
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