Manual

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50
Step 8:
After successful upgrade, execute run or reboot command in BootROM mode to return to CLI
configuration interface.
[Boot]: run(or reboot)
Other commands in BootROM mode
2. 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 ----
CONFIG RUN command
Used to set the IMAGE file to run upon system start-up, and the configuration file to run upon
configuration recovery.
[Boot]: config run
Boot File: [nos.img] nos.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, used for
transferring files between hosts, hosts and switches. Both of them transfer files in a client-
server model. Their differences are listed below.
FTP builds upon TCP to provide reliable connection-oriented data stream transfer service.
However, it does not provide file access authorization and uses simple authentication
mechanism (transfers username and password in plain text for authentication). When using
FTP to transfer files, two connections need to be established between the client and the server:
a management connection and a data connection. A transfer request should be sent by the
FTP client to establish management connection on port 21 in the server, and negotiate a data