Source - Cisco Catalyst 3650 series Command Reference Manual

source

source
To configure the source IP address interface for all of the packets sent by a Flexible NetFlow flow exporter,
use the source command in flow exporter configuration mode. To remove the source IP address interface for
all of the packets sent by a Flexible NetFlow flow exporter, use the no form of this command.
source interface-type interface-number
no source
Syntax Description
interface-type
interface-number
Command Default
The IP address of the interface over which the Flexible NetFlow datagram is transmitted is used as the source
IP address.
Command Modes
Flow exporter configuration
Command History
Release
Cisco IOS XE 3.3SE
Usage Guidelines
The benefits of using a consistent IP source address for the datagrams that Flexible NetFlow sends include
the following:
• The source IP address of the datagrams exported by Flexible NetFlow is used by the destination system
• If your device has multiple interfaces that can be used to transmit datagrams to the destination system,
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
474
Type of interface whose IP address you want to use for the source IP address
of the packets sent by a Flexible NetFlow flow exporter.
Interface number whose IP address you want to use for the source IP address
of the packets sent by a Flexible NetFlow flow exporter.
to determine from which device the Flexible NetFlow data is arriving. If your network has two or more
paths that can be used to send Flexible NetFlow datagrams from the device to the destination system
and you do not specify the source interface from which the source IP address is to be obtained, the device
uses the IP address of the interface over which the datagram is transmitted as the source IP address of
the datagram. In this situation the destination system might receive Flexible NetFlow datagrams from
the same device, but with different source IP addresses. When the destination system receives Flexible
NetFlow datagrams from the same device with different source IP addresses, the destination system
treats the Flexible NetFlow datagrams as if they were being sent from different devices. To avoid having
the destination system treat the Flexible NetFlow datagrams as if they were being sent from different
devices, you must configure the destination system to aggregate the Flexible NetFlow datagrams it
receives from all of the possible source IP addresses in the device into a single Flexible NetFlow flow.
and you do not configure the source command, you will have to add an entry for the IP address of each
Modification
This command was introduced.