CN105429874A - A routing information collection method, system, device and equipment for IS-IS network - Google Patents
A routing information collection method, system, device and equipment for IS-IS network Download PDFInfo
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Abstract
本发明提出一种针对IS-IS网络的路由信息采集方法、系统、装置、设备，涉及网络测量技术领域，该系统包括信息采集模块，用于采集所述IS-IS网络中路由器发送出的LSP报文，并对所述LSP报文进行存储和/或转发，其中将所述信息采集模块发出的CSNP报文的数据设置为空，且对于普通的LSP报文，只进行接收操作，仅当DIS发送的CSNP报文中发现新的LSP报文信息时，才向DIS发送索取相应LSP报文信息的请求。本发明的采集设备不会向外发送LSP报文，同时可以与当前区域的其他路由器同步LSDB，从而采集到全面的路由信息，同时保证采集的实时性。
The present invention proposes a routing information collection method, system, device, and equipment for IS-IS networks, and relates to the technical field of network measurement. The system includes an information collection module for collecting LSPs sent by routers in the IS-IS network message, and store and/or forward the LSP message, wherein the data of the CSNP message sent by the information collection module is set to be empty, and for the ordinary LSP message, only the receiving operation is performed, only when When new LSP message information is found in the CSNP message sent by the DIS, it sends a request for corresponding LSP message information to the DIS. The collection device of the present invention does not send LSP messages outside, and can synchronize LSDBs with other routers in the current area, thereby collecting comprehensive routing information and ensuring real-time collection.
Description
技术领域technical field
本发明涉及网络测量技术领域，特别涉及一种针对IS-IS网络的路由信息采集方法、装置、设备。The invention relates to the technical field of network measurement, in particular to a method, device and equipment for collecting routing information for IS-IS networks.
背景技术Background technique
IS-IS协议是现在主流的路由协议之一，被广泛应用于实际网络环境中，为了支持大规模的路由网络，IS-IS采用的是两级网络分层结构，分为Level-1和Level-2两层，区域内的路由通过Level-1路由器管理，区域间的路由通过Level-2路由器管理，通过交换路由信息，使得每一个区域都保持一份完全相同的LSDB(LinkStateDataBase，链路数据状态数据库)，为了及时发现IS-IS网络的路由故障，保障网络稳定可靠地运行，需要研究如何实时监测IS-IS网络路由运行状况，而前提就是能够高效的进行路由信息的采集工作。The IS-IS protocol is one of the mainstream routing protocols and is widely used in actual network environments. In order to support large-scale routing networks, IS-IS adopts a two-level network hierarchical structure, which is divided into Level-1 and Level-1. -2 layers, intra-area routing is managed by Level-1 routers, and inter-area routing is managed by Level-2 routers. By exchanging routing information, each area maintains an identical LSDB (LinkStateDataBase, link data state database), in order to timely discover the routing faults of the IS-IS network and ensure the stable and reliable operation of the network, it is necessary to study how to monitor the routing operation status of the IS-IS network in real time, and the premise is to be able to efficiently collect routing information.
近年来，针对IS-IS网络路由信息的采集方法相继被提出，如基于配置文件的方法，基于SNMP轮询机制的方法，都是基于主动的网络路由采集方法。基于配置文件的方法是通过分析配置文件来进行信息采集，但是需要离线分析且不能适应大规模的网络；基于SNMP轮询机制的方法是通过获取设备的MIB(ManagementInformationBase，管理信息库)信息监测网络的，信息较全面，可是传输数据量较大，容易产生延迟且可靠性较差。In recent years, collection methods for IS-IS network routing information have been proposed one after another, such as methods based on configuration files and methods based on SNMP polling mechanism, all of which are based on active network route collection methods. The method based on the configuration file is to collect information by analyzing the configuration file, but it needs offline analysis and cannot adapt to a large-scale network; the method based on the SNMP polling mechanism is to monitor the network by obtaining the MIB (Management Information Base, Management Information Base) information of the device Yes, the information is more comprehensive, but the amount of transmitted data is large, prone to delays and poor reliability.
发明内容Contents of the invention
针对现有技术的不足，本发明提出一种针对IS-IS网络的路由信息采集方法、装置、设备。Aiming at the deficiencies of the prior art, the present invention proposes a routing information collection method, device, and equipment for an IS-IS network.
本发明提出一种针对IS-IS网络的路由信息采集系统，包括：The present invention proposes a routing information collection system for IS-IS networks, including:
信息采集模块，用于采集所述IS-IS网络中路由器发送出的LSP报文，并对所述LSP报文进行存储和/或转发，其中将所述信息采集模块发出的CSNP报文的数据设置为空，且对于普通的LSP报文，只进行接收操作，仅当DIS发送的CSNP报文中发现新的LSP报文信息时，才向DIS发送索取相应LSP报文信息的请求。An information collection module, configured to collect an LSP message sent by a router in the IS-IS network, and store and/or forward the LSP message, wherein the data of the CSNP message sent by the information collection module is If it is set to empty, and for common LSP packets, only receiving operation is performed, and only when new LSP packet information is found in the CSNP packet sent by DIS, a request for corresponding LSP packet information is sent to DIS.
所述的针对IS-IS网络的路由信息采集系统，还包括：降低所述信息采集模块在IS-IS网络中的优先级，使所述信息采集模块不会被选举为DIS。The routing information collection system for the IS-IS network further includes: lowering the priority of the information collection module in the IS-IS network, so that the information collection module will not be elected as the DIS.
所述的针对IS-IS网络的路由信息采集系统，IS-IS网络中设置一个或多个所述信息采集模块。In the routing information collection system for the IS-IS network, one or more information collection modules are set in the IS-IS network.
本发明还提出一种针对IS-IS网络的路由信息采集方法，包括：The present invention also proposes a method for collecting routing information for an IS-IS network, including:
采集所述IS-IS网络中路由器发送出的LSP报文，并对所述LSP报文进行存储和/或转发，其中将所述信息采集模块发出的CSNP报文的数据设置为空，且对于普通的LSP报文，只进行接收操作，仅当DIS发送的CSNP报文中发现新的LSP报文信息时，才向DIS发送索取相应LSP报文信息的请求。Collecting the LSP message sent by the router in the IS-IS network, and storing and/or forwarding the LSP message, wherein the data of the CSNP message sent by the information collection module is set to be empty, and for Ordinary LSP messages are only received. Only when new LSP message information is found in the CSNP message sent by the DIS, a request for corresponding LSP message information is sent to the DIS.
所述的针对IS-IS网络的路由信息采集方法，还包括：降低所述信息采集模块在IS-IS网络中的优先级，使所述信息采集模块不会被选举为DIS。The method for collecting routing information for the IS-IS network further includes: lowering the priority of the information collection module in the IS-IS network, so that the information collection module will not be elected as the DIS.
本发明还提出一种采用所述针对IS-IS网络的路由信息采集系统的装置。The present invention also proposes a device using the routing information collection system for the IS-IS network.
本发明还提出一种实施所述针对IS-IS网络的路由信息采集系统的设备。The invention also proposes a device for implementing the routing information collection system for the IS-IS network.
由以上方案可知，本发明的优点在于：As can be seen from the above scheme, the present invention has the advantages of:
本发明的采集设备不会向外发送LSP报文，同时可以与当前区域的其他路由器同步LSDB，从而采集到全面的路由信息，同时保证采集的实时性，在采集LSP报文的过程中，隐藏了采集设备的存在，不会对IS-IS网络的路由和流量造成影响，保证了接入采集设备前后网络的稳定性，同时也保证了采集数据的正确性；对于IS-IS网络的网络监控和性能监测，都需要以网络信息的采集为基础，因此采集方法至关重要，本发明提出的方法及系统，可以通过隐藏采集设备，在不对网络造成影响的前提下，实时全面的采集到IS-IS网络的路由信息。The acquisition device of the present invention will not send LSP messages outward, and can simultaneously synchronize LSDBs with other routers in the current area, thereby collecting comprehensive routing information and ensuring real-time collection. During the process of collecting LSP messages, hidden The existence of the collection equipment will not affect the routing and traffic of the IS-IS network, ensuring the stability of the network before and after access to the collection equipment, and also ensuring the correctness of the collection data; for the network monitoring of the IS-IS network Both network information and performance monitoring need to be based on the collection of network information, so the collection method is very important. The method and system proposed by the present invention can collect IS in real time and comprehensively without affecting the network by hiding the collection equipment. - Routing information of the IS network.
附图说明Description of drawings
图1为本发明一实施例的架构图。FIG. 1 is a structure diagram of an embodiment of the present invention.
具体实施方式detailed description
本发明的目的是针对当前IS-IS网络中路由信息的缺乏有效的采集机制，不便于对网络的分析的问题，提出一种针对IS-IS网络的路由信息采集方法、装置、设备，以解决现存技术当中的采集不全面，对网络造成影响，采集实时性差等问题。The purpose of the present invention is to propose a kind of route information collection method, device, equipment for IS-IS network, to solve The collection in the existing technology is not comprehensive, which affects the network, and the real-time performance of collection is poor.
本发明提出一种针对IS-IS网络的路由信息采集系统，包括：The present invention proposes a routing information collection system for IS-IS networks, including:
信息采集模块，用于采集所述IS-IS网络中路由器发送出的LSP报文，并对所述LSP报文进行存储和/或转发，其中将所述信息采集模块发出的CSNP报文的数据设置为空，且对于普通的LSP报文，只进行接收操作，仅当DIS发送的CSNP报文中发现新的LSP报文信息时，才向DIS发送索取相应LSP报文信息的请求。An information collection module, configured to collect an LSP message sent by a router in the IS-IS network, and store and/or forward the LSP message, wherein the data of the CSNP message sent by the information collection module is If it is set to empty, and for common LSP packets, only receiving operation is performed, and only when new LSP packet information is found in the CSNP packet sent by DIS, a request for corresponding LSP packet information is sent to DIS.
还包括：降低所述信息采集模块在IS-IS网络中的优先级，使所述信息采集模块不会被选举为DIS。It also includes: lowering the priority of the information collection module in the IS-IS network, so that the information collection module will not be elected as the DIS.
IS-IS网络中设置一个或多个所述信息采集模块。One or more information collection modules are set in the IS-IS network.
本发明还提出一种针对IS-IS网络的路由信息采集方法，包括：The present invention also proposes a method for collecting routing information for an IS-IS network, including:
采集所述IS-IS网络中路由器发送出的LSP报文，并对所述LSP报文进行存储和/或转发，其中将所述信息采集模块发出的CSNP报文的数据设置为空，且对于普通的LSP报文，只进行接收操作，仅当DIS发送的CSNP报文中发现新的LSP报文信息时，才向DIS发送索取相应LSP报文信息的请求。Collecting the LSP message sent by the router in the IS-IS network, and storing and/or forwarding the LSP message, wherein the data of the CSNP message sent by the information collection module is set to be empty, and for Ordinary LSP messages are only received. Only when new LSP message information is found in the CSNP message sent by the DIS, a request for corresponding LSP message information is sent to the DIS.
还包括：降低所述信息采集模块在IS-IS网络中的优先级，使所述信息采集模块不会被选举为DIS。It also includes: lowering the priority of the information collection module in the IS-IS network, so that the information collection module will not be elected as the DIS.
本发明还提出一种采用所述针对IS-IS网络的路由信息采集系统的装置。The present invention also proposes a device using the routing information collection system for the IS-IS network.
本发明还提出一种实施所述针对IS-IS网络的路由信息采集系统的设备。The invention also proposes a device for implementing the routing information collection system for the IS-IS network.
以下为本发明的具体步骤，如下所示：The following are the concrete steps of the present invention, as follows:
IS-IS网络的路由信息载体是LSP(LinkStateProtocolDataUnit,链路状态协议数据单元)报文，通过对LSP报文的采集，即可以获取到IS-IS网络的路由信息，IS-IS协议的特征是路由器之间都会建立邻接关系，在P2P(Point-to-Point，点到点)链路上，第一次建立起邻居时，路由器会先发送CSNP(CompleteSequenceNumbersProtocolDataUnit，完全数字序列协议数据单元)给对端，如果对端的LSDB与CSNP没有同步，则发送PSNP(PartialSequenceNumbersProtocolDataUnit，部分数字序列协议数据单元)请求索取相应的LSP；而在广播网络中，当路由器新接入时，网段中的指定路由器会把收到新加入路由器发送的LSP加入到LSDB中，并等待CSNP报文定时器超时并发送CSNP报文，进行该网络内的LSDB同步。通过以上方式保证每一个区域都保持一份完全相同的链路数据状态数据库。The routing information carrier of the IS-IS network is the LSP (LinkStateProtocolDataUnit, Link State Protocol Data Unit) message. Through the collection of the LSP message, the routing information of the IS-IS network can be obtained. The characteristics of the IS-IS protocol are Adjacency relationships will be established between routers. On a P2P (Point-to-Point, point-to-point) link, when a neighbor is established for the first time, the router will first send CSNP (CompleteSequenceNumbersProtocolDataUnit, complete number sequence protocol data unit) to the peer If the LSDB of the opposite end is not synchronized with the CSNP, it will send a PSNP (PartialSequenceNumbersProtocolDataUnit) request to obtain the corresponding LSP; and in a broadcast network, when a router is newly connected, the designated router in the network segment will Add the LSP sent by the newly joined router to the LSDB, and wait for the CSNP message timer to expire before sending the CSNP message to synchronize the LSDB in the network. Through the above methods, it is ensured that each area maintains an identical link data state database.
被动采集方法的实施是在网络中附加受控的采集设备，与正常的路由器建立IS-IS邻接关系，采集设备与正常路由器之间就会相互交换LSP报文，可以通过采取以下措施被动采集路由信息：The implementation of the passive collection method is to add a controlled collection device to the network, establish an IS-IS adjacency relationship with a normal router, and exchange LSP messages between the collection device and the normal router. The following measures can be taken to passively collect routes information:
(1)将采集设备CSNP报文的数据部分设置为空(1) Set the data part of the CSNP message of the acquisition device to empty
当建立邻居关系时，会向邻居路由器发送CSNP报文，当CSNP报文不为空时，邻居路由器就会记录采集设备的路由信息，并有可能将采集设备加入到路由表之中。因此需要将采集设备发出的CSNP报文的数据部分设置为空，这样CSNP报文中就不会携带采集设备的路由信息，减少了对当前网络的干预。When a neighbor relationship is established, a CSNP message will be sent to the neighbor router. When the CSNP message is not empty, the neighbor router will record the routing information of the collection device, and may add the collection device to the routing table. Therefore, it is necessary to set the data part of the CSNP message sent by the collection device to be empty, so that the CSNP message does not carry the routing information of the collection device, reducing the intervention on the current network.
(2)只进行接受和向DIS(DesignatedIntermediaSystem，指定中间系统)请求新的LSP报文(2) Only accept and request new LSP messages from DIS (DesignatedIntermediaSystem, designated intermediate system)
对于普通的LSP报文，只进行接受操作，屏蔽相关的发送操作，仅当在DIS发送的CSNP报文中发现有新的LSP报文信息时，才向DIS发送PSNP请求索取相应的LSP。进而可以把路由器发送出的LSP报文进行存储，转发之类的处理，实现了路由信息被动式的采集。For ordinary LSP messages, only the receiving operation is performed, and related sending operations are blocked. Only when new LSP message information is found in the CSNP message sent by the DIS, it sends a PSNP request to the DIS to obtain the corresponding LSP. Furthermore, the LSP message sent by the router can be stored, forwarded and other processing, realizing the passive collection of routing information.
由于全网中的路由信息需要保持一致，因此可以采集到全面的网络信息，且根据IS-IS协议支持大规模网络路由信息的快速收敛，可以保证LSP报文采集的实时性。Since the routing information in the entire network needs to be consistent, comprehensive network information can be collected, and the IS-IS protocol supports fast convergence of large-scale network routing information, ensuring real-time collection of LSP packets.
采集设备隐藏技术，如下所示：The acquisition device hiding technology is as follows:
在采集LSP报文的过程中，不能改变网络的原有架构，影响网络正常运行。为了获取LSP报文，需要接入网络，作为虚拟路由器的采集设备会和邻接路由器建立邻接关系，但是这样会使的采集设备会暴露在IS-IS现网环境中，网络的拓扑会发生改变，其中的部分流量也会重新选择路由，有可能导致网络业务中断甚至网络瘫痪的严重后果。因此需要在现网中隐藏采集设备的存在。During the process of collecting LSP packets, the original structure of the network cannot be changed, which will affect the normal operation of the network. In order to obtain LSP packets, it needs to be connected to the network. The collection device as a virtual router will establish an adjacency relationship with the adjacent router, but this will expose the collection device to the IS-IS live network environment, and the network topology will change. Part of the traffic will also be rerouted, which may lead to serious consequences of network service interruption or even network paralysis. Therefore, it is necessary to hide the existence of the collection device in the live network.
在IS-IS广播网络环境中，路由器根据各自的优先级，选举高优先级的路由器为DIS，DIS产生的伪节点会周期性的发送CSNP报文给本区域内的其他路由器，普通路由器接收到CSNP报文之后，会和本地链路状态数据库LSDB进行比较，如果本地数据库中没有或者有LSP需要更新，就会向DIS路由器发送PSNP报文请求需要的LSP，DIS返回相应的LSP报文，如果收到的CSNP报文中的LSP信息比本地LSDB中的数据陈旧，则会发送本地最新的LSP给DIS进行更新。进行更新。如果收到的CSNP报文中的LSP信息和本地数据库中信息一致，则不做任何操作。因此，可以降低采集设备的优先级，使自身不被选举为DIS，同时让采集设备只接受LSP报文，而不向外发送报文，其邻居路由器就不会得知其存在，从而隐藏了采集设备。In an IS-IS broadcast network environment, routers elect high-priority routers as DISs according to their respective priorities. The pseudo-nodes generated by DISs will periodically send CSNP messages to other routers in the area. After the CSNP message, it will be compared with the local link state database LSDB. If there is no LSP in the local database or there is an LSP that needs to be updated, it will send a PSNP message to the DIS router to request the required LSP, and the DIS will return the corresponding LSP message. If If the LSP information in the received CSNP message is older than the data in the local LSDB, it will send the latest local LSP to the DIS for updating. to update. If the LSP information in the received CSNP message is consistent with the information in the local database, no operation is performed. Therefore, the priority of the collection device can be lowered so that it is not elected as the DIS, and at the same time, the collection device only accepts LSP packets and does not send out packets, so that its neighbor routers will not know its existence, thus hiding collection equipment.
以下为本发明一实施例，如图1所示，在IS-IS网络中部署一台或多台采集设备，与网络中的一台或多台正常路由器建立邻接关系，保证这台路由器和其他路由器的连通性，便可以开始进行路由数据的采集工作了。The following is an embodiment of the present invention, as shown in Figure 1, one or more acquisition devices are deployed in the IS-IS network, and an adjacency relationship is established with one or more normal routers in the network to ensure that this router and other After the connectivity of the router is established, the collection of routing data can begin.
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| CN106059850A (en) * | 2016-05-17 | 2016-10-26 | 中国科学院计算技术研究所 | Link abnormity detection method, system, apparatus, and chip in IS-IS network |
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