Ip Route-Cache Flow - Cisco Catalyst 4500 Series Command Reference Manual

ip route-cache flow

ip route-cache flow
To enable NetFlow statistics for IP routing, use the ip route-cache flow command. To disable NetFlow
statistics, use the no form of this command.
Syntax Description
infer-fields
Defaults
NetFlow statistics is disabled.
Inferred information is excluded.
Command Modes Global configuration mode
Command History Release
12.1(13)EW
12.1(19)EW
Usage Guidelines To use these commands, you need to install the Supervisor Engine IV and the NetFlow Service Card.
The NetFlow statistics feature captures a set of traffic statistics. These traffic statistics include the source
IP address, destination IP address, Layer 4 port information, protocol, input and output identifiers, and
other routing information that can be used for network analysis, planning, accounting, billing and
identifying DoS attacks.
NetFlow switching is supported on IP and IP-encapsulated traffic over all interface types.
If you enter the ip route-cache flow infer-fields command after the ip route-cache flow command, you
will purge the existing cache, and vice versa. This action is done to avoid having flows with and without
inferred fields in the cache simultaneously.
For additional information on NetFlow switching, refer to the Catalyst 4500 Series Switch Cisco IOS
Software Configuration Guide.
Note NetFlow consumes additional memory and CPU resources compared to other switching modes. You
need to know the resources required on your switch before enabling NetFlow.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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ip route-cache flow [infer-fields]
no ip route-cache flow [infer-fields]
(Optional) Includes the NetFlow fields as inferred by the software: Input identifier,
Output identifier, and Routing information.
Modification
Support for this command was introduced on the Catalyst 4500 series switches.
Command enhanced to support infer fields.
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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