CN101877675A - 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
Autonomous territory (Autonomous System) is as network association independently, and the interconnection by has each other constituted Global Internet jointly.What the interconnection between the autonomous territory was mainly adopted is BGP (Border Gateway Protocol) Routing Protocol, it is a kind of based on (inter-domain) Routing Protocol between the territory of strategy (policy), by the Routing Information Exchange between deployment routing policy control domain, and then realization is to the guiding and the orientation of cross-domain user data traffic.
Yet because the relative independentability in autonomous territory, each autonomous territory all can define and dispose specific routing policy voluntarily for self-demand or regulation, and the routing policy of inside, autonomous territory is normally confidential.Therefore, this will have a negative impact to cross-domain user data traffic that should the autonomy territory from the arrival in other autonomous territory or approach, make it arrive the purpose network according to the path of optimizing (or expection), and because 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, influence the overall operation performance of Global Internet.In addition, in the deployment and enforcement of routing policy, because the coverage of routing policy is bigger, 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 the urgent technical problem that solves of those skilled in the art to be exactly at present: how can improve the existing problem of inter-domain routing in the prior art, in order to when guaranteeing each autonomous territory routing policy independence and non-transparency, effectively reduce the risk that routing policy is adjusted, and improve the cooperation regulation and control efficient of cross-domain routing policy.
Summary of the invention
Technical problem to be solved by this invention provides a kind of cross-domain BGP policy regulating effect appraisal procedure and device VTGCS, in order to when guaranteeing each autonomous territory routing policy independence and non-transparency, effectively reduce the risk that routing policy is adjusted, and improve the cooperation regulation and control efficient 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:
Realize interconnection with the distributed BGP route measurement in this autonomous territory with the node (BGN) of tactful emulation platform system (BGP-Grid);
Generate specific virtual flow packet, and send to the BGN in this autonomous territory;
For the virtual flow packet of being intercepted and captured, send to the BGN in this autonomous territory after the processing of reversing from the virtual flow generation/intercepting and capturing in other autonomous territory servers (VTGCS);
For the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
Preferably, described for the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed and specifically comprises following substep between the network information that extraction is collected on the way from packet and territory:
The virtual flow packet of intercepting and capturing from this autonomous territory VTGCS;
When the judgment data packet format was correct, the interconnection performance parameter was analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
Preferably, described for the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed and also comprises following substep between the network information that extraction is collected on the way from packet and territory:
When the judgment data packet format is incorrect, abandon this packet.
Preferably, the intercommunicated GS-Tunnel that crosses finishes with the BGN realization in this autonomous territory, and the IP address that is different from other autonomous territory VTGCS is used in the IP address of interconnection.
Preferably, described counter-rotating is handled and is meant exchange source and destination address.
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 is used to generate virtual flow packet and the virtual flow packet that will generate sends to the BGN in this autonomous territory; Described virtual flow packet comprises the virtual flow packet of counter-rotating that is derived from the virtual flow packet of starting of this autonomous territory and generates as requested;
Virtual flow is intercepted and captured module, is used for being responsible for the virtual flow packet of intercepting and capturing from this autonomous territory BGN, and carries out preliminary format checking, after the affirmation data packet format is correct it is submitted to;
Virtual flow processing module, be used for the interface of virtual flow generation module transmission source IP address and purpose 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.
Preferably, described virtual flow processing module also is responsible for the content of being extracted is transferred to the virtual flow generation module virtual flow packet that is configured to reverse.
Preferably, described virtual flow intercepting and capturing module also is used for confirming that data packet format abandons this packet after incorrect.
Preferably, the described virtual flow generation module virtual flow packet that will generate by general-purpose simulation tunnel (GS-Tunnel) sends to the BGN in this autonomous territory.
Preferably, described virtual flow is intercepted and captured module from the virtual flow packet of GS-Tunnel intercepting and capturing from this autonomous territory BGN.
Compared with prior art, the present invention has the following advantages:
Lay in each autonomous territory of the present invention oneself independently VTGCS with interconnect at the BGP-Grid in autonomous territory core component BGN, automatically generate as required, intercept and capture, handle virtual flow packet, virtual flow packet will be handled and transmit by autonomous territory BGN and other relevant autonomous territory BGN, thereby finish emulation and the assessment of interconnection routing policy between the territory of true the Internet being adjusted effect jointly, by simulating the cross-domain flow rate of true the Internet, the platform of direct traffic between analysis domain is provided for network operation personnel, realize the bi-directional probing of end-to-end hop-by-hop integrated network information, for network operation personnel provide more comprehensive forward and reverse hop-by-hop performance data, directly perceived show end-to-end hop-by-hop integrated network information, be convenient to network operation personnel understand cross-domain flow rate through between the territory performance data of interconnection line.
Description of drawings
Fig. 1 is the structure chart of the embodiment of the invention one described a kind of cross-domain BGP policy regulating effect apparatus for evaluating VTGCS;
Fig. 2 is the flow chart of the embodiment of the invention two described a kind of cross-domain BGP policy regulating effect appraisal procedures.
Embodiment
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.
Embodiment one:
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 is used to generate virtual flow packet and the virtual flow packet that will generate sends to the BGN in this autonomous territory; Described virtual flow packet comprises the virtual flow packet of counter-rotating that is derived from the virtual flow packet of starting of this autonomous territory and generates as requested;
Preferably, the described virtual flow generation module 101 virtual flow packet that will generate by general-purpose simulation tunnel (GS-Tunnel) sends to the BGN in this autonomous territory.
Basic element in each distributed BGP route measurement and tactful emulation platform system (BGP-Grid) architecture is that distributed BGP route is measured and tactful emulation platform, each autonomous territory is laid with oneself independently VTGCS, this VTGCS with interconnect at the BGP-Grid in autonomous territory core component BGN.
The virtual flow generation module 101 main generations of being responsible for virtual flow packet, comprise the generation that is derived from the virtual flow packet of starting of this autonomous territory, and require the virtual flow packet of counter-rotating that generates according to virtual flow processing module, and the virtual flow packet that will generate sends to the BGN in this autonomous territory by GS-Tunnel.
Virtual flow processing module obtains comprising the flow simulation request of source IP address and purpose IP address from user interface, the IP address information is passed to virtual flow generation module 101, and submit the generation request of the virtual flow packet that starts 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, source IP address that transmission is next and purpose IP address write source address field and the destination address domain in the virtual flow packet IP packets headers respectively, and finish the filling in other territory of IP packets headers, the load of IP grouping is set to sky, wherein, virtual flow generation module 101 will be constructed the good virtual flow packet that starts sends to this autonomous territory by GS-Tunnel BGN.
Virtual flow is intercepted and captured module 102, is used for being responsible for the virtual flow packet of intercepting and capturing from this autonomous territory BGN, and carries out preliminary format checking, after the affirmation data packet format is correct it is submitted to;
Preferably, described virtual flow is intercepted and captured module 102 from the virtual flow packet of GS-Tunnel intercepting and capturing from this autonomous territory BGN.
Preferably, described virtual flow intercepting and capturing module 102 also is used for confirming that data packet format abandons this packet after incorrect.
Virtual flow is intercepted and captured module 102 and is received forwarding behind the virtual flow packet of this autonomous territory BGN from GS-Tunnel, at first packet is carried out format checking (as the integrality of checking integrated network information record and correctness etc.), after confirming that data packet format is errorless, it is submitted to virtual flow processing module, otherwise abandon this packet.
Virtual flow processing module will be extracted whole integrated network information records from packet after receiving that virtual flow is intercepted and captured the virtual flow packet of module 102 submissions; And from first group of integrated network information record, read receiving interface IP address, if the IP address that the GS-Tunnel of this IP address and VTGCS uses belongs to same subnet, can determine that then this packet is the virtual flow packet that is generated by this autonomous territory VTGCS, and transmit again after the VTGCS counter-rotating via the autonomous territory of far-end purpose, virtual flow processing module will put in order and according to the form of standard directly perceived to user's whole recorded informations in the dateout bag one by one, and finish this flow simulation operations; If the IP address that the GS-Tunnel of this IP address and VTGCS uses does not belong to same subnet, can determine that it is then that to start be the virtual flow packet of destination address from other autonomous territory VTGCS with this autonomous territory, virtual flow processing module will be extracted source IP address and purpose IP address from the IP packets headers of this virtual flow packet, pass to virtual flow generation module 101 together with all integrated network information records that before from packet, extract, and submit the generation request of the virtual flow packet of counter-rotating to virtual flow generation module 101 to;
Virtual flow generation module 101 is after the generation request of receiving from the virtual flow packet of the counter-rotating of virtual flow processing module, source IP address that transmission is next and purpose IP address write destination address domain and the source address field (finishing the counter-rotating of source/destination address) in the virtual flow packet IP packets headers respectively, and finish the filling in other territory of IP packets headers, order writes all integrated network information records that virtual stream amount processing module passes in the load of IP grouping, simultaneously, the virtual flow generation module 101 of VTGCS will be constructed the good virtual flow packet of counter-rotating sends to this autonomous territory by GS-Tunnel BGN.
Virtual flow processing module 103, be used for the interface of virtual flow generation module 101 transmission source IP address and purpose 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 also is responsible for the content of being extracted is transferred 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 purpose IP address to generate the virtual flow packet that starts accordingly, simultaneously, this module also receives the virtual flow packet of submitting to the self-virtualizing flow to intercept and capture module 102, judge by extraction and analysis virtual flow packet content, and then this packet recorded contents exported to network operation personnel, or the recorded content that is extracted is transferred to the virtual flow generation module 101 virtual flow packet that is configured to reverse.
On virtual flow processing module 103, set up user's (being network operation personnel) interface, so that response is from user's flow simulation request, and flow simulation result (being two-way hop-by-hop integrated network information) exported to the user in mode intuitively; The interface of foundation and virtual flow generation module 101 is so that transmit generation request and the 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, so that receive through virtual flow and intercept and capture the virtual flow packet of submitting to behind module 102 format checkings, to its carry out that data record is extracted and analyze judge after, finish to user's output or to the counter-rotating of packet and handle.
Each autonomous territory all has unique VTGCS, and its operation, management, configuration and adjustment all are responsible for voluntarily by this autonomous territory, are not subjected to the management and control in other autonomous territory.VTGCS can independently generate and handle virtual flow packet according to these autonomous territory network operation personnel's requirement, simultaneously, each autonomous territory VTGCS can work in coordination with and intercept and capture and reverse with its autonomous territory is the virtual flow packet of destination.
Undertaken alternately by calling of pre-defining between each functional module of VTGCS, realize the function such as the generation of virtual flow packet, intercepting and capturing, counter-rotating of VTGCS jointly with data-interface.These functional modules are independently of one another, thereby are convenient to as required, under the situation that does not influence other module, particular module carried out function adjustment and upgrading, have good expandability.
VTGCS can generate cross-domain virtual flow packet according to network operation personnel's needs, and the BGN that passes to this autonomous territory carries out inter-domain routing and transmit, thereby realizes the simulation to the cross-domain flow in true the Internet.
Traditional network test instrument (as traceroute) can only realize that usually forward (from the source to the purpose) the hop-by-hop network information is surveyed end to end, can't carry out synchronizing detection to reverse (from the purpose to the source) hop-by-hop network information.VTGCS is in the forward hop-by-hop integrated network information detection of finishing true the Internet, can also finish effective detection by the virtual flow packet inversion mechanism of the autonomous territory VTGCS of its purpose, thereby realize bi-directional probing the end-to-end hop-by-hop integrated network information of true the Internet to reverse hop-by-hop integrated network information.
VTGCS can extract the two-way hop-by-hop integrated network information that writes down in the virtual flow packet, comprise that autonomous territory number, receiving interface IP address, circuit point-to-point postpone, the current available bandwidth of circuit, and they are exported the network operation personnel that are shown in visual and understandable mode, so that it is to the contrast and the assessment of intra domain routing policy regulating effect.
Virtual flow packet encapsulation is on the IP of standard grouping, and the source address of IP grouping and destination address 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.The loading section of IP packets headers back comprises 0 or the integrated network information record of a plurality of virtual flow packets, each record all has 12 bytes, comprises that the circuit point-to-point of the autonomous territory 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 two:
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 distributed BGP route in this autonomous territory and the node (BGN) of tactful emulation platform system (BGP-Grid) is realized interconnection;
Preferably, the intercommunicated GS-Tunnel that crosses finishes with the BGN realization in this autonomous territory, and the IP address that is different from other autonomous territory VTGCS is used in the IP address of interconnection.
VTGCS interconnects by the BGN in GS-Tunnel and this autonomous territory, and interconnection IP address can freely be selected, the preferred IP address field in this autonomous territory of use or have the sign effect and be different from the IP address of other autonomous territory VTGCS in the present embodiment.
S202 generates specific virtual flow packet, and sends to the BGN in this autonomous territory;
S203 for the virtual flow packet of being intercepted and captured from the virtual flow generation/intercepting and capturing in other autonomous territory servers (VTGCS), sends to the BGN in this autonomous territory after the processing of reversing;
Preferably, described counter-rotating is handled and is meant exchange source and destination address.
S204, for the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
Preferably, described S204 specifically comprises following substep:
The virtual flow packet of intercepting and capturing from this autonomous territory VTGCS;
When the judgment data packet format was correct, the interconnection performance parameter was analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
More preferred, described S204 also comprises following substep:
When the judgment 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 what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For method embodiment, because its operation principle to device embodiment is similar substantially, so description is fairly simple, relevant part gets final product referring to the explanation of device embodiment part.
More than to a kind of cross-domain BGP policy regulating effect appraisal procedure provided by the present invention and the device VTGCS be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. cross-domain BGP policy regulating effect appraisal procedure is characterized in that described method comprises:
Realize interconnection with the distributed BGP route measurement in this autonomous territory with the node (BGN) of tactful emulation platform system (BGP-Grid);
Generate specific virtual flow packet, and send to the BGN in this autonomous territory;
For the virtual flow packet of being intercepted and captured, send to the BGN in this autonomous territory after the processing of reversing from the virtual flow generation/intercepting and capturing in other autonomous territory servers (VTGCS);
For the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
2. method according to claim 1, it is characterized in that, described for the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed and specifically comprises following substep between the network information that extraction is collected on the way from packet and territory:
The virtual flow packet of intercepting and capturing from this autonomous territory VTGCS;
When the judgment data packet format was correct, the interconnection performance parameter was analyzed and is assessed between the network information that extraction is collected on the way from packet and territory.
3. method according to claim 2, it is characterized in that, described for the virtual flow packet of being intercepted and captured from this autonomous territory VTGCS, the interconnection performance parameter is analyzed and is assessed and also comprises following substep between the network information that extraction is collected on the way from packet and territory:
When the judgment data packet format is incorrect, abandon this packet.
4. method according to claim 1 is characterized in that:
Realize that with the BGN in this autonomous territory the intercommunicated GS-Tunnel of mistake finishes, the IP address that is different from other autonomous territory VTGCS is used in the IP address of interconnection.
5. method according to claim 4 is characterized in that:
Described counter-rotating is handled and is meant exchange source and destination address.
6. cross-domain BGP policy regulating effect apparatus for evaluating VTGCS is characterized in that described device comprises:
Virtual flow generation module is used to generate virtual flow packet and the virtual flow packet that will generate sends to the BGN in this autonomous territory; Described virtual flow packet comprises the virtual flow packet of counter-rotating that is derived from the virtual flow packet of starting of this autonomous territory and generates as requested;
Virtual flow is intercepted and captured module, is used for being responsible for the virtual flow packet of intercepting and capturing from this autonomous territory BGN, and carries out preliminary format checking, after the affirmation data packet format is correct it is submitted to;
Virtual flow processing module, be used for the interface of virtual flow generation module transmission source IP address and purpose 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.
7. device VTGCS according to claim 6 is characterized in that:
Described virtual flow processing module also is responsible for the content of being extracted is transferred to the virtual flow generation module virtual flow packet that is configured to reverse.
8. device VTGCS according to claim 6 is characterized in that:
Described virtual flow is intercepted and captured module and also is used for confirming that data packet format abandons this packet after incorrect.
9. device VTGCS according to claim 6 is characterized in that:
The virtual flow packet that described virtual flow generation module will generate by general-purpose simulation tunnel (GS-Tunnel) sends to the BGN in this autonomous territory.
10. device VTGCS according to claim 9 is characterized in that:
Described virtual flow is intercepted and captured module from the virtual flow packet of GS-Tunnel intercepting and capturing from this autonomous territory BGN.
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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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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