Network Monitoring and Data Center Operation - SOI-Asia

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BWCTL (Bandwidth Control)Users attempting to run bandwidth tests used to be notcertain whether or not their test was scheduled in a timeframe where other tests were not to run BWCTL is a resource allocation and scheduling daemon forarbitration of iperf tests BWCTL client application works by contacting a bwctld processon both endpoints of test systems Requires that NTP be running to synchronize the system clock Open mode : everyone can use Authentication mode : need to exchange AES key Support IPv6, Platform : UNIX systems Developed by Internet2 http://e2epi.internet2.edu/bwctl/OWAMP (One-way Active Measurement Protocol)Roundtrip-based measurement can not identify the delay ineach direction, especially when asymmetric routers are used OWAMP is a command line client application and a policy daemonused to determine one way latencies between hosts It is possible to collect active measurement data- e.g., one-way delay, packet loss, jitter NTP must be setup correctly on the system to calculate areasonable estimate of time error and to stabilize clock Support IPv6. Platform : UNIX systems Current Draft : draft-ietf-ippm-owdp-10.txt Developed by Internet2 http://e2epi.internet2.edu/owamp/icmp ping : RTTowping : one-way26
OWAMP - Protocol - Consists of two inter-related protocols•OWAMP-ControlUsed to initiate, start/stop test sessions, and fetch test results•OWAMP-TestDefine the format of probe packet Sample measurement datahttp://pe2.koganei.wide.ad.jp/cgi-bin/owd-stathttp://qpe.jp.apan.net/cgi-bin/owd-statNetflow - Overview -Overview•Enables IP traffic flow analysis without probes•Invented and patented by CiscoJuniper (called cflowd), Foundry, many venders are supporting•Flow cash data on routers is exportedto a flow tool, so that traffic flow is to be analyzedEnable NetFlowTrafficCore NetworkUDPNetFlowExportPacketsCollector(Solaris, HP-UX, or Linux)Application GUIflow Definition:•Source IP address•Destination IP address•Source port•Destination port•Layer 3 protocol type•TOS byte (DSCP)•Input logical interface(ifIndex)27
Page 1 and 2: Network Monitoring andData Center O
Page 3 and 4: Why Network Monitoring is necessary
Page 5 and 6: Monitoring Method 1 Examine how to
Page 7 and 8: - ICMP/Ping Polling 1 - Check IP re
Page 9 and 10: SNMP - Version - SNMP v1 RFC1157•
Page 12 and 13: SNMP - SNMP Message Handling 2 - Co
Page 18 and 19: MRTG - Configuration 2 - Target Con
Page 20 and 21: RRDtool-Architecture -Comparison of
Page 22 and 23: RRDtool - Update -Stores a new set
Page 24 and 25: Advanced Tools for MeasuringNetwork
Page 28 and 29: Netflow - Flow Data -Flow data expo
Page 30 and 31: Introduction of other advanced tool
Page 32 and 33: Data Center operation- Service -1.
Page 34 and 35: Professional management & operation
Page 36 and 37: Proposal for Improving NetworkServi

Network Monitoring and Data Center Operation - SOI-Asia

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