2002 - cesnet

For the planned topology of the CESNET2 backbone for 2003, see Figure 4.4. Inaddition to the use of new PE routers, we plan to double the network core andother GE lines.3.5 Backbone Network ManagementThe central management of the backbone network is provided by NOC CESNET(Network Operating Centre) on a non-stop basis (24 hours a day 365 days ayear). For the purposes of backbone network administration, we make use ofthe following tools:Backbone network management: HP OpenView NNM 6.2 on the Sun UltraSparc420R station with Solaris 2.8 operating system. It primarilyserves for the monitoring of the network status.Management of network devices (routers, switches, …): CiscoWorks 2000.Service monitoring: The Nagios 1 program, version 1.0., an follower of the formerlyused NetSaint. We use it for the monitoring of service availability(mail, DNS, WWW and others). The server of the Nagios system is alsoused for the supervision of IPv6 network. For the purpose of monitoring,we make use of both protocols (IPv4 and IPv6), as the monitoringof some variables has not been ported to the IPv6 protocol yet.Statistical systems: The GTDMS system contains a number of alarms for theexceeding of limits. It monitors routers (CPU load, free memory, powersupply, internal temperature), as well as lines (overload, increased errorrate, etc.). The GTDMS system and the backbone network statisticsare described in details in the following section.For the processing of NetFlow statistics, we make use of our own system,developed in one of our projects. It is intended for the statisticalevaluation of individual customers traffic, as well as for the handlingof safety-related incidents (evaluation of current flows according tothe preset conditions). For a detailed description of the analyser, seeChapter 15. NetFlow data is exported by all network border routers.Request Tracker (RT): Intended as a tool for request processing (their creation,solution monitoring and archiving) within the network operation. Fora detailed description of this system, see Chapter 18. Several queueshave been developed for the operation of CESNET2, used by the definedgroups of users (network administrators, NOC, users, …).Out-of-Band management (OOB): Remote access to the network devices,available whenever they are inaccessible through the backbone network,is implemented in all network PoPs.1http://www.nagios.org/28 High-speed National Research Network and its New Applications 2002