Configuring Active Monitoring
Although the Monitoring Services PIC was designed initially for use as an offline passive monitoring tool, it can now be used as an active monitor. To use the Monitoring Services PIC as an active monitor, the PIC must be installed in an M5, M10, or M20 router. The resulting active monitoring router participates in both the monitoring application and in the normal routing functionality of the network. The traffic to be monitored is captured with next-hop sampling using the JUNOS software's port mirroring feature.
Specified packets can be filtered and sent to a Monitoring Services PIC. This PIC can be the same one that participates in port mirroring or a different Monitoring Services PIC. To send filtered packets to a specified Monitoring Services PIC interface, you configure a filter-based forwarding firewall.