It depends. RME uses a configurable variety of protocols to fetch device configurations. You can few the current protocol order under RME > Admin > Config Mgmt > Transport Settings. At a bare minimum, you can use TFTP, and configure an SNMP read-write credential in DCR for the device. RME will then use SNMP to trigger a TFTP fetch of the configuration. For telnet and SSH, RME will connect to the device, then perform show run/show startup to collect the running and startup configurations. Those protocols require you have an optional username, a password, and an enable password configured in DCR.
