Cisco Cisco IOS Software Release 12.0(15)S

Bytes: Number of bytes in the aggregated flows.

First: Sys up time at which the first packet was switched.

Last: Sys up time at which the last packet was switched.

Source Prefix: Prefix that the source IP address of the aggregated flows belonged to.

Src Mask Bits: Number of bits in the source prefix.

ToS: Type of Service byte.

Source AS: autonomous system of the source IP address (peer or origin).

Source Interface: SNMP index of the interface the packets arrived on.

Reserved: Zero field.

The DestinationPrefix-ToS aggregation scheme groups flows with common destination prefix, 
destination prefix mask, destination BGP autonomous system, ToS byte, and output interface. The 
aggregated NetFlow Export record reports the following:

Destination IP address

Destination prefix mask

Destination autonomous system

ToS byte

Number of flows summarized by the aggregated record

Number of bytes summarized by this aggregated record

Number of packets summarized by this aggregation record

Output interface

Starting and ending time stamps

This aggregation scheme is particularly useful for generating data with which to examine the 
destinations of network traffic passing through a NetFlow-enabled device. Figure 6 displays the 
Destination Prefix aggregation export record format and a list follows describing the data.