Save the current configuration from DRAM to NVRAM
copy running-config startup-config
Merge NVRAM configuration to DRAMcopy startup-config running-config
Copy DRAM configuration to a TFTP server
copy runing-config tftp
Merge TFTP configuration with current router configuration held in DRAM
copy tftp runing-config
Backup the IOS onto a TFTP server
copy flash tftp
Upgrade the router IOS from a TFTP server
copy tftp flash