The following cflowd components must be configured for cflowd to be operational:
Cflowd must be enabled globally.
At least one collector must be configured and enabled.
A cflowd option must be specified and enabled on a router interface.
Sampling must be enabled on the interface (ingress only).
On the 7210 SAS, when cflowd is enabled on an IP interface, the sampling rate is applied to a port and only the samples that match the IP interface for which cflowd is enabled are processed further to update or create flow records in the flow cache. Samples received that do not match the IP interface for which cflowd is enabled are not processed further, and flow records are not created for them.
On the 7210 SAS, samples are collected only in the ingress direction. Sampling in the egress direction is not supported.