Hi, Houtan H Larijani Thanks for you reply... It worked just fine. Thanks.   But on the flow exporter config, it didn't allow me to use: source <IP Address> Only the interface...So I used the interface and it worked. Here is what it allows me: Router(config)#flow exporter PRTG Router(config-flow-exporter)#source ?   Async                          Async interface   Auto-Template                  Auto-Template interface   BVI                            Bridge-Group Virtual Interface   CDMA-Ix                        CDMA Ix interface   CTunnel                        CTunnel interface   Dialer                         Dialer interface   Embedded-Service-Engine        cisco embedded service engine module   GigabitEthernet                GigabitEthernet IEEE 802.3z   Group-Async                    Async Group interface   LongReachEthernet              Long-Reach Ethernet interface   Loopback                       Loopback interface   MFR                            Multilink Frame Relay bundle interface   Multilink                      Multilink-group interface   Null                           Null interface   Port-channel                   Ethernet Channel of interfaces   Tunnel                         Tunnel interface   Vif                            PGM Multicast Host interface   Virtual-PPP                    Virtual PPP interface   Virtual-Template               Virtual Template interface   Virtual-TokenRing              Virtual TokenRing   vmi                            Virtual Multipoint Interface Router(config-flow-exporter)# Few questions: 1. Can I use the "original-output" on the same flow monitor? So, putting something like (check red ): flow monitor MONITOR_PRTG  exporter PRTG  record netflow ipv4 original-input   record netflow ipv4 original-output   2. On the interfaces Im monitoring, I left like this: interface GigabitEthernet0/1.2  encapsulation dot1Q 1  ip address <IP-ADDRESS>  <MASK>   ip nbar protocol-discovery ipv4  ip flow ingress  ip flow egress  ip flow monitor MONITOR_ENH input Using the flow monitor, do I have to keep or remove the red commands above?   3. On the interface below for example, can I use the input with output at the same time? Or the " input " itself works? interface GigabitEthernet0/1.2  encapsulation dot1Q 1  ip address <IP-ADDRESS>  <MASK>  ip nbar protocol-discovery ipv4  ip flow ingress  ip flow egress   ip flow monitor MONITOR_ENH input   Thanks again for your reply.   Regards /EV ... View more