Example: Sampling All FTP Traffic
The following configuration gathers statistical information about a moderate percentage of packets using FTP in the output path of a specific T3 interface, and collects the information in a file named t3-ftp-traffic.txt.
Create a filter:
[edit firewall family inet]filter ftp-stats {term ftp-usage {from {destination-port [ftp ftp-data];}then {sample;accept;}}}
Apply the filter to the T3 interface:
[edit interfaces]t3-7/0/2 {unit 0 {family inet {filter {input ftp-stats;}address 10.35.78.254/32 {destination 10.35.78.4;}}}}
Finally, gather statistics on 10 percent of the candidate samples:
[edit forwarding-options]sampling {input {rate 10;}family inet {output {file {filename t3-ftp-traffic.txt;files 50;size 1m;}}}}
