Cisco IOS XR

1. Create and configure an exporter map.

2. Create and configure a monitor map and a sampler map.

3. Apply the monitor map and sampler map to an interface.

Configuring an Exporter Map:

configure
flow exporter-map fem
destination a.b.c.d
source vlan3
transport udp 2055
version v9
options sampler-table 300
commit
exit
exit
show flow exporter-map fem

Configuring a Sampler Map:

configure
sampler-map fsm
random 1 out-of 1
commit
exit
exit
show sampler-map fsm

Configuring a Monitor Map:

configure
flow monitor-map fmm
record ipv4
cache timeout inactive 300
exporter fem
commit
exit
exit
show flow monitor-map fmm

Applying a Monitor Map and a Sampler Map to an Interface:

configure
interface gigabitEthernet 0/0/0/0
flow ipv4 monitor fmm sampler fsm ingress
commit

Reference:

NetFlow Configuration for Traffic Monitoring and Analysis