Cisco 2960x netflow configuration

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Cisco 2960x netflow configuration

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ï¿½ Homeï¿½ Supportï¿½ Product Supportï¿½ Switchesï¿½ Cisco Catalyst 2960-X Series Switchesï¿½ Configureï¿½ Configuration GuidesNetFlow Lite Configuration Guide, Cisco IOS Release netflos (Catalyst 2960-X Switch) Book TitleNetFlow Lite Configuration Guide, Cisco IOS Release 15.2(2)E (Catalyst 2960-X Switch) Chapter TitleConfiguring NetFlow Liteï¿½ PDF - Complete Book(2.46 MB) PDF - This Chapter (1.62 Cieco with Adobe Reader on a variety of devicesï¿½ ePub - Complete Book(298.0 KB)View in various apps on iPhone, iPad, Android, Sony Reader, or Windows PhonePrint ï¿½ Finding Feature Informationï¿½ Prerequisites for NetFlow Liteï¿½ Restrictions for NetFlow Liteï¿½ Information About NetFlow Liteï¿½ NetFlow Lite Overviewï¿½ Flexible NetFlow Componentsï¿½ Flow Recordsï¿½ NetFlow Predefined Recordsï¿½ User-Defined Recordsï¿½ NetFlow Lite Match Parametersï¿½ NetFlow Lite Collect Parametersï¿½ Flow Exportersï¿½ Flow Monitorsï¿½ Flow Samplersï¿½ NetFlow Lite and Stackingï¿½ Default Settingsï¿½ How to Configure NetFlow Liteï¿½ Creating a Flow Recordï¿½ Creating a Flow Exporterï¿½ Creating a Flow Monitorï¿½ Creating a Netfoow Applying a Flow to an Interfaceï¿½ Configuring a Bridged NetFlow on a VLANï¿½ Configuring Layer 2 NetFlowï¿½ Monitoring Flexible NetFlowï¿½ Configration Examples for NetFlow Liteï¿½ Example: Configuring a Flowï¿½ Additional Referencesï¿½ Feature Information for Flexible NetFlowï¿½ Configuring NetFlow LiteClose Configuring NetFlow Liteï¿½ Finding Feature Informationï¿½ Prerequisites forNetFlow Liteï¿½ Restrictions forNetFlow Liteï¿½ Information About NetFlow Liteï¿½ How to ConfigureNetFlow Liteï¿½ Monitoring FlexibleNetFlowï¿½ Configuration Examples for NetFlow Liteï¿½ AdditionalReferencesï¿½ Feature Information confihuration Flexible NetFlowFinding Feature InformationYour software release may not support all the features documented in this module.

For the latest caveats and feature information, seeBug Search Tool and the release notes for your platform and software release. To find information about the features documented in configurxtion module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.Use Cisco Feature Configuraiton to find information about platform support and Cisco software image support.

To access Cisco Feature Navigator, go towww.cisco.com/?go/?cfn. An account on Cisco.com is not required.Prerequisites forNetFlow LiteNetFlow Lite is only supportedon a Catalyst 2960-X Switch with a LAN Base license and on a Catalyst 2960-XRSwitch with an IP Lite license.

Catalyst 2960-XR is not stackable with theCatalyst 2960-X platform.The following twotargets for attaching aNetFlow Lite monitor aresupported:ï¿½Portï¿½Monitorattachment is only supported on physical interfaces and not on logicalinterfaces, confoguration as EtherChannels. The physical interface could be a routedport or a switched port.ï¿½VLANï¿½Monitorattachment is supported on VLAN interfaces only (SVI) and not on a Layer 2VLAN.Restrictions forNetFlow LiteThefollowing are restrictions forNetFlow Lite:ï¿½Monitorrestrictions:ï¿½Monitorattachment is only supported in the ingress direction.ï¿½One monitorper interface is supported, although multiple exporters per interface aresupported.ï¿½Onlypermanent nwtflow normal cache is supported for the monitor; immediate cache is notsupported.ï¿½Changing anymonitor parameter will not be supported when it is applied on any of theinterfaces or VLANs.ï¿½When boththe port and VLANs have monitors attached, then VLAN monitor will overwrite theport monitor for traffic coming on the port.ï¿½Flowmonitor type and traffic type (type means IPv4, IPv6, and data link) should besame for the flows to be created.ï¿½You cannot attach an IP and port-based monitorto an interface at the same time on theswitch.A 48-portswitchsupports a maximum of 48 monitors (IP or port-based) and for 256 SVIs, you canconfigure up to 256 monitors (IP or port-based).ï¿½Whenrunning theshow flow monitorflow_name cache command, the switch displays cacheinformation from an earlier switch software version (Catalyst 2960-S) with allfields entered as zero.

Ignore these fields, as they are inapplicable to theswitch.ï¿½Samplerrestrictions:ï¿½Onlysampled NetFlow is supported.ï¿½For bothport and VLANS, a total of only 4 samplers (random or deterministic) aresupported on theswitch.ï¿½The sampling minimum rate for both modes is 1out of 32 flows, and the sampling maximum rate for both modes is 1 out of 1022flows.ï¿½You mustassociate a sampler with a monitor while attaching it to an interface.Otherwise, the command will configurqtion rejected.

Use theip flow monitormonitor_name sampler s ampler_name inputinterface configuration command to perform this task.ï¿½When you attach a monitor using a deterministicsampler, every attachment with the same conriguration uses one netflpw free sampler fromthe switch (hardware) out of 4 available samplers. You are not allowed toattach a monitor with any sampler, beyond 4 296x0 youattach a monitor using a random sampler, only the first attachment uses a newsampler netflpw the switch (hardware).

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sFlow: A Technical Reviewï¿½ NBA: Is Network Behavior Analysis For What can I do to prevent this netfllow the future?If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not configuratin with malware.If you are configuraton an cisco 2960x netflow configuration or shared network, you can ask the network administrator to run a scan across 29960x network looking for misconfigured or infected devices. This webcast discusses:-Cisco TrustSec uses SXP to simplify security and policy enforcement throughout the network.-The different application types AVC can recognize and control.-IPv6 First-Hop Security enhances Layer-2 and Cofniguration network access from proliferating IPv6 devices especially BYOD devices.

It protects against rogue router advertisements, address spoofing, fake DHCP replies and other risks introduced by IPv6 technology.-Device Sensor and Device Classifier enable seamless versatile device profiles including BYOD devices.

They also enable Cisco Identity Services Engine (ISE) to provision identity based security policies.-Cisco Threat Defense features including Port Security, Configurstion ARP Inspection, and IP Source GuardOriginally published June 20, 2013. Attention, Internet Explorer UserAnnouncement: Jive has discontinued support for Internet Explorer 7 and below.In order to provide the best platform for continued innovation, Jive no longer supports Internet Explorer 7.Jive will not function with this version of Internet Explorer.

Please consider upgrading to a more recent version of Internet Explorer, or trying another browser such as Firefox, Safari, or Google Chrome.(Please remember to honor your cidco IT policies before installing new software!)ï¿½ Upgrade Internet Explorerï¿½ Download Firefoxï¿½ Use Safari (OSï¿½Xï¿½only)ï¿½ Download Google Chrome Cisco & Cisco Network Hardware News and TechnologyThere are all kinds of news and information related to Cisco and Cisco network equipment, such as release of Cisco equipment, news of Cisco's new networking solution, and Cisco hardware and software upgrading. Cisco NetFlow-Lite confiugration the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series SwitchesMay 7 2015, Written by Cisco & Cisco Router, Netflo SwitchPublished on#Cisco Netlfow - Cisco Configurxtion discussed the Cisco Catalyst 4948E Netflod before.

Whatï¿½s the difference between the NetFlow and Netflow-Lite? We knew that NetFlow-lite was first introduced with Configurxtion 4948E, and it bridges the gap by providing a lightweight solution that allows capturing of important flow information through packet sampling mechanisms combined with the extensibility of NetFlow version 9 and IPFIX.

NetFlow-Lite introduces traffic visibility on the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series Switches for the first time.NetFlow-Lite collects packets randomly, classifies them into flows, and measures flow statistics cisco 2960x netflow configuration they pass through the switch.

It is a true flow-based traffic-monitoring mechanism that conserves valuable forwarding bandwidth when exporting flow-based data for analysis and reporting.In the following part it provides visibility into traffic that is switched through the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series Switches.Firstly we can read what NetFlow-Lite is used for againNetFlow-Lite offers network administrators and engineers the following capabilities:? Unprecedented visibility: NetFlow-Lite provides real-time information about traffic flows from endpoints such as PCs, phones, IP cameras, etc.

You can use this information for traffic monitoring of Layer 2 and Layer 3 traffic as well as capacity planning.? Network planning: You can use NetFlow-Lite to capture data over a long period of confihuration so that customers can understand traffic patterns, top talkers, top applications, etc. This feature provides accurate data to track and anticipate network growth and plan upgrades.? Simplified troubleshooting: You can use Confguration flow-based analysis techniques to understand traffic patterns, which can vonfiguration in proactively detecting problems, cisc efficiently, and resolving configuratoin quickly.NetFlow-Lite CapabilitiesNetFlow-Lite provides a granular packet-sampling mechanism that is adjustable up to 1:32 and available for all interfaces.

The implication is that a subset of all packets passing through the switch is selected for reporting.NetFlow-Lite on the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series Switches have the following capabilities:ï¿½ NetFlow-Lite is supported on all downlink and uplink ports.ï¿½ NetFlow-Lite is natively available with no additional hardware required.ï¿½ The sampling range is from 1:32 to 1:1022.ï¿½ The application measures 16,000 flows per switch.ï¿½ Physical ports cisfo VLAN Interfaces (switched virtual netfllow [SVI]) are supported.ï¿½ NetFlow-Lite supports ingress flows only.ï¿½ Export using standards-based IP Information export (IPFIX) or Version 9 record format.NetFlow-Lite Sampling TechniquesThe sampling method of the traffic can be random or deterministic.

Random sampling chooses one packet randomly out of a configured sample size, whereas deterministic sampling chooses the first packet out of a configured sample size. For donfiguration, for 1:32 configurayion, deterministic mode would choose the 1st, 33rd, 65th, 97th, and so on packet coming into an interface, and random mode can choose the 5th, 39th, 72nd, 103rd, and so on packet coming into an interface. Random packet sampling is statistically more accurate than deterministic packet sampling.NetFlow-Lite Solution- NetFlow-Lite configuration on the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series SwitchesSteps-Only 5 StepsStep1.

Configure a Flow Record, which defines the data collection. You can customize it for specific requirements. You can use the following example with most NetFlow collectors: flow record v4 match ipv4 nettlow match ipv4 protocol match ipv4 source address match ipv4 destination address match transport source-port match transport destination-port collect transport tcp flags collect interface cisvo collect flow sampler collect counter bytes long collect counter packets long collect timestamp sys-uptime first collect timestamp sys-uptime lastStep2.

Configure a Flow Exporter, which defines where the collected data needs to be sent. Please refer to the NetFlow collector application user guides and manual for specific details such as port number, differentiated services code point (DSCP), and other options. The configuration follows: flow exporter Replicatordescription Exporter to Cisco Prime 2.0destination 10.2.44.12source GigabitEthernet1/0/1dscp 16template data timeout 60option interface-tableStep3.

Configure a Flow Monitor, which binds the flow record and exporter along with options to configure theIntroductionAs networks become more complex and organizations enable more fisco, traffic patterns become more diverse and unpredictable. Organizations require better visibility into network traffic in a manageable way.

It is configurationn for network operators to obtain information about where, why, when, how, and by whom specific applications are used and how the usage might affect the network. Cknfiguration information is vital to enhancing operational efficiency and optimizing operational costs.

Cisco ï¿½ NetFlow technology is one of the most scalable ways to provide this information throughout your network infrastructure. NetFlow-Lite introduces traffic visibility on the Cisco Catalyst ï¿½ 2960-X, 2960-XR, 2960-CX, and 3560-CX Series Switches for the first time.What Is NetFlow-Lite?NetFlow-Lite collects packets randomly, classifies them into flows, and measures flow statistics as they pass through the switch.

It is a true flow-based traffic-monitoring mechanism that conserves valuable forwarding bandwidth when exporting flow-based data for analysis and reporting. This export data provides visibility into traffic that is switched through the Cisco Catalyst cisck, 2960-XR, 2960-CX, and 3560-CX Series Switches.What Is NetFlow-Lite Used for?NetFlow-Lite offers network administrators and engineers the following capabilities:? Unprecedented visibility: NetFlow-Lite provides real-time information about traffic flows from endpoints such as PCs, phones, IP cameras, etc.

You can use this information for traffic monitoring of Layer 2 and Layer 3 traffic as well as capacity planning.? Network planning: You can use NetFlow-Lite to capture data over configyration long period of time so that customers can understand traffic patterns, top talkers, top applications, etc. This feature provides accurate data to track and anticipate network growth and plan upgrades.? Simplified troubleshooting: You can use NetFlow-Lite flow-based analysis techniques to understand traffic patterns, which can help in proactively detecting problems, troubleshooting efficiently, and resolving problems quickly.NetFlow-Lite CapabilitiesNetFlow-Lite provides a granular packet-sampling mechanism that is adjustable up to 1:32 and available for all interfaces.

The implication is that a subset of all packets passing through the switch is selected for reporting. Figure 2 shows some of the data gathered by Cisco NetFlow-Lite. Figure 1.

Output from Cisco NetFlow-LiteNetFlow-Lite on the Cisco Catalyst 2960-X, 2960-XR, 2960xx, and 3560-CX Netflwo Switches have the following capabilities:? NetFlow-Lite is supported on all downlink and uplink ports.? NetFlow-Lite is natively available netflw no additional hardware required.? The sampling range is from 1:32 to 1:1022.? The application measures 16,000 flows per switch.? Physical ports and VLAN Interfaces (switched virtual interfaces [SVI]) are supported.? NetFlow-Lite supports ingress flows only.? Export using standards-based IP Information export (IPFIX) or Version 9 record format.NetFlow-Lite Sampling TechniquesThe sampling method donfiguration the traffic can be random or deterministic.

Random cobfiguration chooses one packet randomly out of a configured sample size, whereas deterministic sampling chooses the first packet out of a configured sample size. For example, for 1:32 sampling, deterministic mode would choose the 1 st, 33 rd, 65 th, 97 th, and so on packet coming into an interface, and random mode can choose configuratoon 5 th, 39 th, 72 nd, 103 rd, and so on packet coming into an interface.

Random packet sampling is statistically more accurate than deterministic packet sampling.Differences between Flexible NetFlow-Lite, Flexible NetFlow, and sFlowTable 1 confiyuration the differences between NetFlow-Lite, Flexible NetFlow, and sFlow.Table 1.

Differences between NetFlow-Lite, Flexible NetFlow, and sFlow NetFlow-liteFlexible NetFlowsFlowTechnologyFlow-basedFlow-basedPacket-basedSamplingSampling (1 in 32, configurable)Every packet accounted forSampling (1 in hundreds to thousands *)Export formatV9 and IPFIXV5, V9 and IPFIXsFlow v5EcosystemNetFlow CollectorNetFlow CollectorsFlow CollectorAvailabilityCisco Catalyst 2960-X, 2960-XR, 2960-CX, and configuratino Series Switches, and Catalyst 4948E Ethernet SwitchCisco Catalyst 3K, 4K, 6KCisco Nexus ï¿½ routers 7K, 2K, 1KVCisco Nexus 3K * Product support of sFlow may vary.NetFlow-Lite SolutionThe following steps illustrate NetFlow-Lite configuration on the Cisco Catalyst 2960-X, 2960-XR, 2960-CX, and 3560-CX Series Switches:Step 1.

Configure a Flow Record, which defines the data collection. You can customize it for specific requirements. You can use the following example with most NetFlow collectors:flow record v4match ipv4 tosmatch ipv4 protocolmatch ipv4 source addressmatch ipv4 destination addressmatch transport source-portmatch transport destination-portcollect transport tcp flagscollect interface inputcollect flow samplercollect counter bytes longcollect counter packets longcollect timestamp sys-uptime firstcollUsing NetFlow technology, network administrators can efficiently monitor bandwidth usage for capacity planning and resource allocation.

Until now, NetFlow monitoring was supported only in Cisco high-end switches, such as Cisco Catalyst 3K, 4K, and 6K series switches. Ciscoï¿½s NetFlow-Lite is a light-weight, packet based sampling technology to monitor switching traffic in widely-used switches. With Cisco NetFlow-Lite, administrators can now easily monitor bandwidth across a variety of Cisco switches.NetFlow-Lite is currently supported on the Cisco Catalyst 2960-X and 4948E.

NetFlow-Lite can be configured as Version9 or IPFIX export fields. As of now, only ingress monitoring is available coniguration NetFlow-Lite. Currently, NetFlow-Lite includes new fields like MAC addresses and option-templates, but these fields are not now available in the NetFlow Analyzer UI. However, they might be included in future releases.Unlike traditional NetFlow, sampling is mandatory for NetFlow-Lite. There are two types of sampling algorithm available ï¿½ deterministic and random sampling.

Random sampling can monitor all interfaces. Deterministic sampling can be used for limited interfaces of the device.You can use the following commands to configure the switch to export NetFlow-Lite flows to a NetFlowAnalyzer server. These commands are supported in Cisco IOS 15.0(2)EX1.Creating as Flow Record in Switch config mode:Switch(config)# flow record NfliteRecordSwitch(config-flow-record)# collect counter bytes longSwitch(config-flow-record)# collect counter packets longSwitch(config-flow-record)# collect flow samplerSwitch(config-flow-record)# collect interface inputSwitch(config-flow-record)# collect timestamp sys-uptime firstSwitch(config-flow-record)# collect timestamp sys-uptime lastSwitch(config-flow-record)# collect transport tcp flags ackSwitch(config-flow-record)# collect transport tcp flags finSwitch(config-flow-record)# collect transport tcp flags rstSwitch(config-flow-record)# match datalink ethertypeSwitch(config-flow-record)# match datalink mac source address inputSwitch(config-flow-record)# match datalink mac destination address inputSwitch(config-flow-record)# match ipv4 protocolSwitch(config-flow-record)# match ipv4 destination addressSwitch(config-flow-record)# match ipv4 source addressSwitch(config-flow-record)# match ipv4 tosSwitch(config-flow-record)# match ipv6 protocol // optional : for IPv6 onlySwitch(config-flow-record)# match ipv6 destination address // optional : 29660x IPv6 onlySwitch(config-flow-record)# match ipv6 source address // optional : for IPv6 onlySwitch(config-flow-record)# match ipv6 tos // optional : for IPv6 onlySwitch(config-flow-record)# match transport destination-portSwitch(config-flow-record)# match transport source-portCreating as Flow Exporter in Switch config mode:Switch(config)# flow exporter NfliteExporterSwitch(config-flow-exporter)# destination 10.10.10.10 // Nfa server IPSwitch(config-flow-exporter)# export-protocol netflow-v9Switch(config-flow-exporter)# option interface-tableSwitch(config-flow-exporter)# option exporter-statsSwitch(config-flow-exporter)# option sampler-tableSwitch(config-flow-exporter)# source loopback 0 // source interface can be any L3 interfaceSwitch(config-flow-exporter)# template data timeout 60Switch(config-flow-exporter)# transport udp netflos as Flow Monitor in Switch config mode:-Switch(config)# flow monitor NfliteMonitorSwitch(config-flow-monitor)# record NfliteRecordSwitch(config-flow-monitor)# exporter NfliteExporterSwitch(config-flow-monitor)# cache timeout active cizco cache timeout inactive 15Switch(config-flow-monitor)# cache type normalSwitch(config-flow-monitor)# statistics packet protocolCreating configuation Flow Sampler in Switch config mode:Switch(config)# sampler NfliteSamplerSwitch(config-sampler)# mode random 1 out-of 32 // The range can be 32 to 1022Applying Flow Monitor to an interface in Interface config mode:-Switch(config)# interface gigabitethernet 0/0Switch(config-if)# ip flow monitor NfliteMonitor sampler NfliteSampler input // Repeat this command on all interfaces.Senthil.NNetFlow Analyzer Technical Team Leave a Reply Cancel replyYour email address will not be published.

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