Use the following CLI syntax to enable traffic sample on a service interface.
config>service>ies>if>cflowd-parameters# sampling {unicast|multicast} type {interface} [direction {ingress-only}]
config>service>vprn>if>cflowd-parameters# sampling {unicast|multicast} type {interface} [direction {ingress-only}]
no sampling {unicast|multicast}
When enabled on a service interface, cflowd collects routed traffic flow samples through a router for analysis. Cflowd is supported on IES and VPRN service interfaces only. Layer 2 traffic is excluded. All packets forwarded by the interface are analyzed according to the cflowd configuration. On the interface level, cflowd can be associated with an IP interface.