Cisco Nexus 5600 Series:

Configuring NetFlow

Note: Use the show flow exporter command to display NetFlow statistics. Use the clear flow exporter command to clear NetFlow flow exporter statistics. In the commands below, "Ethernet2/9" is the interface on which the Netflow is being enabled.

Login to the router as an admin user, and run the commands below:

This example shows how to configure a NetFlow exporter configuration for IPv4:

flow exporter pw
  destination 172.20.101.87 use-vrf management
  transport udp 3000
  source mgmt0
  version 9
flow record pw
  match ipv4 source address
  match ipv4 destination address
  match ip protocol
  match ip tos
  match transport source-port
  match transport destination-port
  collect counter bytes long
  collect counter packets long
  collect timestamp sys-uptime first
  collect timestamp sys-uptime last
  collect ip version
sampler testsampler
 mode 1 out-of 65536
flow monitor pw
  record pw
  exporter pw
interface Ethernet2/9
  ip flow monitor pw input sampler testsampler

Verifying the NetFlow Configuration

To display the NetFlow configuration, perform one of the following tasks:

Command	Purpose
show flow exporter [name]	Displays information about NetFlow flow exporters and statistics. You can enter up to 63 alphanumeric characters for the flow exporter name.
show flow interface [interface-type slot/port]	Displays information about NetFlow interfaces.
show flow record [name]	Displays information about NetFlow flow records. You can enter up to 63 alphanumeric characters for the flow record name.
show flow record netflow layer2-switched input	Displays information about the Layer 2 NetFlow configuration.
show flow timeout	Displays information about NetFlow timeouts.
show sampler [name]	Displays information about NetFlow samplers. You can enter up to 63 alphanumeric characters for the sampler name.
show hardware ip flow	Displays information about NetFlow hardware IP flows.
show running-config netflow	Displays the NetFlow configuration that is currently on your device.

`Reference`

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5600/sw/system_management/7x/b_5600_System_Mgmt_Config_7x/configuring_netflow.html#task_BECBC10EB3F34790BEAE2836530D2D22

Cisco Nexus 9000 Series

Configuration NetFlow

This example shows how to configure a NetFlow exporter configuration for IPv4:

To enable the NetFlow feature

configure terminal
feature netflow
end
To create a flow record
configure terminal
flow record vrni-record
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
match interface input
collect transport tcp flags
collect counter bytes
collect counter packets
collect timestamp sys-uptime first
collect timestamp sys-uptime last
End
To create a flow exporter
configure terminal
flow exporter vrni-exporter
destination <PROXY_IP>
transport udp 2055
version 9
source <INTERFACE_NAME>
end
To create the flow monitor for each interface
configure terminal
flow monitor vrni-monitor
record vrni-record
exporter vrni-exporter
end
To configure timeouts
configure terminal
cache timeout inactive 30
cache timeout active 60
end
To configure the flow monitor for each interface on the ingress mode and the egress mode or at least the ingress mode
configure terminal
interface <INTERFACE_NAME>
ip flow monitor vrni-monitor input
end

Verifying the NetFlow Configuration

To display the NetFlow configuration, perform one of the following tasks:

Command	Purpose
show flow cache [ipv4 \| ipv6 \| ce]	Displays information about NetFlow IP flows.
show flow exporter [name]	Displays information about NetFlow flow exporters and statistics. You can enter up to 63 alphanumeric characters for the flow exporter name.
show flow interface [interface-type slot/port]	Displays information about NetFlow interfaces.
show flow record [name]	Displays information about NetFlow flow records. You can enter up to 63 alphanumeric characters for the flow record name.
show flow record netflow layer2-switched input	Displays information about the Layer 2 NetFlow configuration.
show running-config netflow	Displays the NetFlow configuration that is currently on your device.

`Reference`

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/system_management/configuration/guide/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_System_Management_Configuration_Guide_7x_chapter_011100.html

https://docs.vmware.com/en/VMware-vRealize-Network-Insight/Cloud/com.vmware.vrni.using.doc/GUID-F2BC0864-F84B-4CAF-9027-FDDC8FBBF3B8.html

Configuring a Netflow Collector for Cisco Nexus 9000 Series Switches

Cisco Nexus 5600 Series:

Configuring NetFlow

Verifying the NetFlow Configuration

Reference

Cisco Nexus 9000 Series

Configuration NetFlow

Verifying the NetFlow Configuration

Reference

`Reference`

`Reference`