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+# VPP IPFIX Configuration
+
+VPP IPFIX in VyOS allows monitoring and exporting network traffic flows
+for analytics, security, and accounting. IPFIX works with the VPP
+(Vector Packet Processing) backend to provide high-performance flow tracking.
+
+## Overview
+
+VyOS integrates VPP for high-performance packet processing. IPFIX
+configuration controls how flows are monitored, exported, and which
+interfaces are included.
+
+## Key IPFIX Concepts
+
+- **Active timeout**: Maximum time a flow is kept active before export.
+- **Inactive timeout**: Maximum time an idle flow is kept before export.
+- **Collector**: The remote host and port to which flow records are sent.
+- **Flow layers**: Determines which layer information is included
+  (`l2`, `l3`, `l4`).
+- **Interfaces**: Physical or virtual interfaces to monitor.
+- **Direction**: Which traffic to monitor (`rx`, `tx`, `both`).
+- **Flow variant**: Optional filter for IPv4 or IPv6 flows.
+
+## Configuration Options
+
+- **active-timeout**: Duration (in seconds) after which active flows
+  are exported.
+- **inactive-timeout**: Duration (in seconds) after which idle flows
+  are exported.
+- **collector \`\<ip>\` port \`\<port>\`**: IP and UDP port of the IPFIX collector.
+- **collector \`\<ip>\` source-address \`\<ip>\`**: Source address for flow export.
+- **flowprobe-record \`\<l2|l3|l4>\`**: Layers to include in flow records.
+- **interface** `<interface>` **\[direction** `<rx|tx|both>`**\]**
+  **\[flow-variant** `<ipv4|ipv6>`**\]**: Interfaces to monitor,
+  direction of traffic, and optional flow variant filter.
+
+## Example Configuration
+
+```none
+set vpp ipfix active-timeout '15'
+set vpp ipfix inactive-timeout '120'
+set vpp ipfix collector 192.0.2.2 port '4739'
+set vpp ipfix collector 192.0.2.2 source-address '192.0.2.1'
+set vpp ipfix flowprobe-record 'l2'
+set vpp ipfix flowprobe-record 'l3'
+set vpp ipfix flowprobe-record 'l4'
+set vpp ipfix interface eth0
+set vpp ipfix interface eth1 direction 'both'
+set vpp ipfix interface eth1 flow-variant 'ipv4'
+```