Network Monitoring and Data Center Operation - SOI-Asia

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MRTG - Configuration 2 - Target Configuration•Target ExpressionTarget[]::@• : Identify equipment• : Measurement item• : SNMP community string• : Hostname or IP address of equipment•SNMP data collection specification method Basic / Port (ifindex)Target[myrouter]: 2:public@wellfleet-fddi.ethz.ch Explicit OIDs / MIB VariablesTarget[myrouter]: 1.3.6.1.2.1.2.2.1.14.1&1.3.6.1.2.1.2.2.1.20.1:public@myrouterTarget[myrouter]: ifInErrors.1&ifOutErrors.1:public@myrouterYou can use cfgmaker to generate references with the options-- ifref=? iref=ip: Interface by IP ifref=descrf: Interface by Description ifref=name: Interface by Name ifref=eth: Interface by Ethernet AddressMRTG - Configuration 3 -Example of ConfigurationTarget[la]: ifHCInOctets¥so-2/0/0&ifHCOutOctets¥so-2/0/0:xxxxxxx@tpr2.jp.apan.net:::::2MaxBytes[la]: 300000000Title[la]: Traffic Analysis of TransPAC LA LinkPageTop[la]: Traffic Analysis of TransPAC LA linkWithPeak[la]: ymwDirectory[la]: tpr2Options[la]: bits, growrightTarget[la-err]: ifInErrors¥so-2/0/0&ifOutErrors¥so-2/0/0:xxxxxxx@tpr2.jp.apan.netMaxBytes[la-err]: 300000000Title[la-err]: Packet Error for TransPAC LA linkPageTop[la-err]: Packet Error for TransPAC LA linkDirectory[la-err]: tpr2Options[la-err]: growright, integer, nopercentYLegend[la-err]: Number of Error PacketsShortLegend[la-err]: nLegend1[la-err]: Number of Error Packets for Incoming TrafficLegend2[la-err]: Number of Error Packets for Outgoing TrafficLegend3[la-err]: Peak of Number of Error Packets for Incoming TrafficLegend4[la-err]: Peak of Number of Error Packets for Outgoing TrafficLegendI[la-err]: In:LegendO[la-err]: Out:WithPeak[la-err]: w18
MRTG - Comments - Comments / Disadvantages• If you are to monitor a lot of devices (1000s), it is better tohave a fast disk• If using external monitoring scripts, a fast processor and alot of memory is necessary• Not particularly fast when compared to other data retrievaland storage schemes (Flat text files can slow downprocessing.)• MRTG can’t customize graphing periods• Flat text files are difficult to process when scripting againstthe data• Use 64bit counters with SNMPv2 for OC3-OC192 speedinterface, GbE if it is 115Mbps traffic can wrap 32bit countersaround in 5 minutes• MRTG can’t modify collected data which is summarized• Only two variables are available in processing a graphRRDtool (Round Robin Database Tool)Overview• Successor to MRTG• Developed by the same developer of MRTG : Tobias Oetiker• Tool group for RRD can flexibly define data item, timeinterval, data amount, graph depiction, etc.• Binary file format that can store data at any interval for anylength of time File does not grow in size over time• Ability to make custom graphs across user-defined intervals Ability to graph multiple variables on a single graph• Additional scripts are necessary in creating graphs and webpage 25-30 percent faster than MRTG• Does not have the function to collect data• http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/19
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 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 26 and 27: BWCTL (Bandwidth Control)Users atte
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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