After you enable Netflow on the VMware SD-WAN Edge , it periodically sends messages to the configured collector. The contents of these messages are defined using templates. Internet Protocol Flow Information Export (IPFIX) templates have additional parameters that provide more information regarding the traffic flows.
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Non-NAT Template https://www.iana.org/assignments/ipfix/ipfix.xhtml NAT Template Flow Link Stats Template Tunnel Stats Template Application Option Template https://tools.ietf.org/html/rfc6759 .Interface Option Template VMware Netflow context can be broadly classified into two types: Physical and SD-WAN. VMware Segment ID to Segment Mapping Template Link Option Template Netflow Source Address and Segmentation VMware SD-WAN Orchestrator . In absence of the optional source interface configuration, the flow records would consume one of the up and advertised LAN/Routed IP address as source IP address. It is mandatory to have at least one up and advertised LAN/Routed interface on the particular segment, for Netflow to function. The Orchestrator UI needs to be modified to reflect this. IPFIX Information Element Definitions
