sFlow Agent
The sFlow Agent periodically polls the interface counters that are associated with a data source of the sampled packets. The data source can be an Ethernet interface, an EtherChannel interface, or a range of Ethernet interfaces. The sFlow Agent queries the Ethernet port manager for the respective EtherChannel membership information and also receives notifications from the Ethernet port manager for membership changes.
When you enable sFlow sampling, based on the sampling rate and the hardware internal random number, the ingress and egress packets are sent to the CPU as an sFlow-sampled packet. The sFlow Agent processes the sampled packets and sends an sFlow datagram to the central data collector. In addition to the original sampled packet, an sFlow datagram includes the information about the ingress port, egress port, and the original packet length. An sFlow datagram can have multiple sFlow samples such as mix of flow samples and counter samples.
You can export input and ouput interface handles if the ingress or egress interface is a bundle or a BVI type. The exported interface handles are of the physical interfaces on which the packet arrived or departed and not the bundle or BVI itself.