Netflow Monitoring Free Fixed Page

Router(config)# interface GigabitEthernet0/0 Router(config-if)# ip flow ingress Router(config-if)# ip flow egress Router(config-if)# exit Router(config)# ip flow-export source GigabitEthernet0/0 Router(config)# ip flow-export version 9 Router(config)# ip flow-export destination 192.168.1.100 2055

People who love dashboards and have time to tinker. netflow monitoring free

Developed by Cisco, NetFlow (along with its open-source cousins sFlow, IPFIX, and J-Flow) allows routers and switches to export metadata about traffic flows. But many admins assume that "NetFlow" means "Expensive SolarWinds license." Give it 15 minutes, and you should start

conf t interface gig0/1 ip flow ingress ip flow egress exit flow exporter EXPORTER destination 192.168.1.100 (Your collector IP) transport udp 2055 flow monitor MONITOR exporter EXPORTER record netflow-original interface gig0/1 ip flow monitor MONITOR input ip flow monitor MONITOR output (Replace 192

Flow data accumulates quickly. Give it 15 minutes, and you should start seeing top talker lists, application protocols, and traffic graphs populate.

For years, enterprise-grade flow analysis was reserved for organizations with deep pockets. Today, however, robust open-source and "freemium" tools allow you to monitor network traffic with surprising depth—at zero cost.

(Replace 192.168.1.100 with the IP address of the server running your free monitoring tool).