Configuring Flexible Netflow - Cisco Catalyst 4500 series Administration Manual

Configuring Flexible NetFlow

Flexible NetFlow is supported only on Supervisor Engine 8-E, Supervisor Engine 7-E, Supervisor
Note
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.
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
This chapter addresses both VSS and non-VSS environments:
•
•
VSS Environment
The following items apply to a Catalyst 4500 series switch w that belongs to a Virtual Switch System
(VSS):
1.
2.
3.
4.
OL_28731-01
VSS Environment, page 65-1
Non-VSS Environment, page 65-8
The Catalyst 4500 series switch supports ingress flow statistics collection for switched and routed
packets; it does not support Flexible Netflow on egress traffic.
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
Configuration is performed on the VSS Active switch, which is synchronized to the VSS Standby
switch.
Netflow show commands including Top Talkers, aggregate cache, and clear commands must be
executed independently on VSS Active and Standby switch. The VSS Standby console will be
available via remote console access from the VSS Active switch.
C H A P T E R
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
65
65-1