Fluke Recording Equipment manual Ip flow-cache timeout active, Ip flow-cache timeout inactive

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User’s Guide – version 3.1.3

NetFlow Tracker

ip flow-cache timeout active 1

This breaks up long-lived flows into one-minute segments.

ip flow-cache timeout inactive 15

This ensures that flows that have finished are exported in a timely manner.

interface <interface>

ip route-cache flow or ip flow ingress or ip route-cache cef bandwidth <kbps>

exit

You need to enable NetFlow on each interface through which traffic you are interested in will flow. This will normally be the Ethernet and WAN interfaces. Note that there are several commands to enable NetFlow on an interface and you must use the same command for every interface. ip route-cache flow and ip flow ingress enable NetFlow for inbound traffic on the interface; the only difference between the two is that the latter can be applied to individual sub-interfaces whereas the former must be applied to the physical interface. Be careful not to enable NetFlow for both a physical interface and one or more of its sub-interfaces.

ip flow egress enables NetFlow for outbound traffic on the interface and is required if you are using input filters. You may enable NetFlow for both inbound and outbound traffic on a single interface if you are interested only in its traffic; in this case ensure that no other interface has NetFlow enabled.

Egress NetFlow is also useful if you are monitoring a router that is applying QoS to the traffic it routes – by using egress NetFlow you will see the QoS settings that the router applied rather than those that were on the traffic before it was routed.

You may also need to set the speed of the interface in kilobits per second. It is especially important to set the speed for frame relay or ATM virtual circuits. Note that a Catalyst 4000 series switch does not support any of the commands to enable NetFlow for an interface; instead NetFlow is enabled for all interfaces using a special command documented below.

show ip flow export

This will show the current NetFlow configuration. Issue this in normal (not configuration) mode.

show ip cache flow

show ip cache verbose flow

These commands issued in normal mode summarize the active flows and give an indication of how much NetFlow data the router is exporting.

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Contents NetFlow Tracker Grant of Licence and Payment of Fees Software License AgreementCopyright Customer Remedies Confidential Information and Security User’s Guide version NetFlow Tracker Definitions Supplier’s Undertakings Support ServicesSupport Charges Undertakings by YouLimitation of Liability and indemnity Intellectual Property RightsTermination Miscellaneous Confidential Information and SecurityExceptions to Support Services Support HoursResponse Times Contents LONG-TERM Reports Appendix 2 CSV File Format Introduction What is NetFlow?What is NetFlow Tracker? Features and BenefitsUser’s Guide version NetFlow Tracker Operating System Support InstallationPre-installation Checks Minimum System RequirementsInstallation on Microsoft Windows Installation on Solaris and Linux Post-installation Tasks Add listener ports Set up Snmp community stringsSet up web front-end security Configure your routers and switchesUsing NetFlow Tracker Interfaces Device traffic metersPer-AS data Working with ChartsChanging the displayed chart Chart legendZooming out View a standard chart as a pie chartView a standard chart as a tabular report ZoomingWorking with Pie Charts Working with Tabular Reports User’s Guide version NetFlow Tracker Report Templates Address ReportsSession Reports QoS Reports Network ReportsInterface Reports Report Template Creating Filtered ReportsTraffic Identification Reports Other ReportsEnd Time Sample SizeSource Data Start TimeOut VPN Out InterfaceIn/Out Interface VPNDiffServ Recognised ApplicationIdentified Application ToSDestination Mask Destination SubnetSource/Destination Subnet Source MaskFilter Editor Long-term ReportsDevices and Interfaces Per-device and Per-interface Long-term ReportsUser’s Guide version NetFlow Tracker Executive Reports Report URL Format General FormReport Format Parameters 0025 Chart0023 0024Heading NumberTrue False256 FeaturesSections 128Time Range Parameters Mon HourDay WeekCalendar-based advanced HHmm Applying a time-of-day mask to the time rangeDay1-day2/time1-time2 113 110105 100125 115120 140Daily 285300 MinuteFilter Parameters Name Port/namePort/number Prec TosPrec%20tos Code ByteAddr/mask Password PasswordSecurity Parameters Management Portal Access Control Parameters SecretNull Aclid specifies a permitted long-term report Features Query Size Performance TuningDatabase Server Settings Disk SpeedListener Ports Configuration GuideSnmp Settings LicensingDevice Settings Device SettingsDevice List Archiving Traffic ClassesIdentified Applications Security Settings VPNsDeleting a Device Management Portal Settings Report Settings Saved Filters Long-term ReportsExecutive Reports Span class=repdesctextTest/span Nelements=5 and chartWidth=400 ContentSub-reports User’s Guide version NetFlow Tracker Hostname Resolution Settings IP Application NamesDiffServ Names Database Settings AS NamesSubnet Names User’s Guide version NetFlow Tracker Archiving BackupPerformance Counters Memory SettingsMissed Exports Unprocessed FlowsetsInterface Scans Missed FlowsIp flow-export destination address Appendix 1 Device ConfigurationEnabling Netflow Export on an IOS Device Ip cefShow ip cache flow Show ip cache verbose flow Ip flow-cache timeout activeIp flow-cache timeout inactive Show ip flow exportMls aging long Ip route-cache flow infer-fieldsMls netflow Mls nde sender versionUser’s Guide version NetFlow Tracker Set mls nde address Set mls bridged-flow-statistics enable vlanlistSet mls nde enable Set system name nameEnabling Flow Detail Records on a Packeteer Device Flow-sampler-map allflows mode random one-out-of 1 exitEnabling NetFlow on an Enterasys Device Address Using sflowtool to Convert sFlow Records to NetFlowChart CSV format Appendix 2 CSV File FormatTabular report CSV format Appendix 3 Third Party Software Components