18
Configuration Files, Flash, and the TFTP
V!CAS
Configuration Files, Flash, and the TFTP
As mentioned earlier, the V!CAS reads its configuration information in-
ternally from a configuration file. This file is stored in Flash EEPROM
(electronically eraseable programmable read-only memory), which we
just refer to as Flash. Actually, Flash can hold as many different files as
you need; as long as there’s enough room for them.
Think of Flash as a directory of configuration files. The files in this di-
rectory can be created, copied, moved, deleted. It’s also possible to re-
trieve and transmit configuration files to/from remote hosts. These ac-
tions can be performed using the Configuration Management menu in
Setup Tool or from the SNMP shell by using special commands. Refer to
the description on this menu in Chapter 4 for more information on the
various commands and parameters.
The transfer of configuration files between the V!CAS and remote
hosts is made possible by the TFTP, or Trivial File Transfer Protocol. Us-
ing TFTP, it’s also possible for the V!CAS to retrieve its boot-image (or
system software) from a TFTP host. See the section on the BOOTmonitor
in Chapter 8.
Memory
Flash
ST
A
TE
SAVE
LOAD
REORG
REBOOT
GET
PUT
COPY
MOVE
DELETE
<
Flash File
>
<
New Flash File
>
<
TFTP Server
>
<TFTP File>