CHAPTER
74-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
74
Configuring Flexible NetFlow
Note Flexible NetFlow is supported only on Supervisor Engine 8-E, Supervisor Engine 7-E, Supervisor
Engine 7L-E, and Catalyst 4500X.
Flow is defined as a unique set of key fields attributes, which might include fields of packet, packet
routing attributes, and input and output interface information. A NetFlow feature defines a flow as a
sequence of packets that have the same values for the feature key fields. Flexible NetFlow (FNF) allows
you to collect and optionally export a flow record that specifies various flow attributes. NetFlow
collection supports IP, IPv6 and Layer 2 traffic.
This chapter addresses both VSS and non-VSS environments:
• VSS Environment, page 74-1
• Non-VSS Environment, page 74-8
Note This chapter provides Catalyst 4500 switch specific information. For more information, refer to the
URL:
http://www.cisco.com/en/US/products/ps6965/products_ios_protocol_option_home.html
For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
VSS Environment
The following items apply to a Catalyst 4500 series switch that belongs to a Virtual Switch System
(VSS):
1. The Catalyst 4500 series switch supports ingress flow statistics collection for switched and routed
packets; it does not support Flexible Netflow on egress traffic.
2. Each switch in an VSS has an independent NFE (Netflow Engine). This means that when there is
ingress traffic on both the VSS Active and Standby switches, each is capable of creating flows for
its ingress traffic
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