Prerequisites for Flexible NetFlow
The following are prerequisites for your Flexible NetFlow configuration:
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You must configure a source interface. If you do not configure a source interface, the exporter will remain in a disabled state.
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You must configure a valid record name for every flow monitor.
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You must enable IPv6 routing to export the flow records to an IPv6 destination server.
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You must configure IPFIX export protocol for the flow exporter to export netflow records in IPFIX format.
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You are familiar with the Flexible NetFlow key fields as they are defined in the following commands in the Cisco IOS Flexible NetFlow Command Reference :
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match datalink —Datalink (layer2) fields
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match flow —Flow identifying fields
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match interface —Interface fields
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match ipv4 —IPv4 fields
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match ipv6 —IPv6 fields
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match transport —Transport layer fields
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match wireless —Wireless fields
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You are familiar with the Flexible NetFlow non key fields as they are defined in the following commands in the Cisco IOS Flexible NetFlow Command Reference :
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collect counter —Counter fields
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collect flow —Flow identifying fields
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collect interface —Interface fields
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collect timestamp —Timestamp fields
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collect transport —Transport layer fields
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collect wireless —Wireless fields
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IPv4 Traffic
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The networking device must be configured for IPv4 routing.
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One of the following must be enabled on your device and on any interfaces on which you want to enable Flexible NetFlow: Cisco Express Forwarding or distributed Cisco Express Forwarding.
IPv6 Traffic
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The networking device must be configured for IPv6 routing.
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One of the following must be enabled on your device and on any interfaces on which you want to enable Flexible NetFlow: Cisco Express Forwarding IPv6 or distributed Cisco Express Forwarding.