90
size = 0x1077f8
Step 5:
Execute “write nos.img” in BootROM mode. The following saves the system update
image file.
[Boot]: write nos.img
Programming...
Program OK.
[Boot]:
Step 6:
After successful upgrade, execute “run” command in BootROM mode to return to CLI
configuration interface.
[Boot]: run
（
or reboot
）
Other commands in BootROM mode
1. DIR command
Used to list existing files in the FLASH.
[Boot]: dir
boot.rom 327,440 1900-01-01 00: 00: 00 --SH
boot.conf 83 1900-01-01 00: 00: 00 --SH
nos.img 2,431,631 1980-01-01 00: 21: 34 ----
startup-config 2,922 1980-01-01 00: 09: 14 ----
temp.img 2,431,631 1980-01-01 00: 00: 32 ----
2. CONFIG RUN command
Used to set the IMG file to run upon system start-up, and the configuration file to run
upon configuration recovery.
[Boot]: config run
Boot File: [nos.img] nos1.img
Config File: [boot.conf]
2.5.3 FTP/TFTP Upgrade
2.5.3.1 Introduction to FTP/TFTP
FTP(File Transfer Protocol)/TFTP(Trivial File Transfer Protocol) are both file transfer
protocols that belonging to fourth layer(application layer) of the TCP/IP protocol stack,
