You can specify up to four remote collectors to send the sFlow data to. Typically, you would configure the IP address of each collector. You may also specify a UDP port number different from the default value of 6343, and/or a virtual router different from the default of VR-Mgmt. When you configure a collector, the system creates a database entry for that collector that remains until the collector is unconfigured. All the configured collectors are displayed in the command: show sflow {configuration}.