This section gives the steps to configure cflowd/J-Flow export on Juniper devices.To enable sampling and to export the flow records to specific destination address, follow the below command:
forwarding-options {
sampling {
input {
family inet {
rate 100;
run-length 9;
max-packets-per-second 7000;
}
}
{
cflowd <destination address>{
port <port number>;
source-address <source address>;
version <version number>;
no-local-dump;
autonomous-system-type origin;
}
}
}
}
To enable packet sampling on the particular interface(s), from which flow analyzis to be done follow the below steps:
interfaces {
ge-1/3/0 {
vlan-tagging;
unit 101 {
vlan-id 101;
family inet {
sampling {
input;
output;
}
address 206.80.253.26/25
}
}
}
}
For more information, refer here and this link (to configure V9 Template record).