14.4 Notes on saving to Internal flash memory
The Switch uses the built-in flash memory to store device information, such as software, configuration, and log information.
Due to the general characteristics of the device, the on-chip flash memory has an upper limit on the number of rewrites. If the number of rewrites exceeds that number, the internal flash memory may be damaged.
The timing for writing to the internal flash memory of the Switch is when the configuration is saved and some operation commands are executed on the Switch. If these operations are continued at 30-minute intervals, the write limit may be reached in about 6 years.
- <Structure of this section>
(1) Configuration command
The main configuration commands that trigger writing to the on-chip flash memory are shown below.
-
save (write)
-
ip dhcp snooping database url flash
(2) Operation command
The following table describes the main operation commands that trigger writing to the on-chip flash memory.
|
Category |
Operation command |
|---|---|
|
Terminals and Remote Operations |
set terminal pager #, set exec-timeout # |
|
Configurations and File Operations |
copy, cp, rm, delete, undelete, squeeze, erase configuration |
|
Stack |
set switch, dump stack |
|
Login Security and RADIUS or TACACS+ |
adduser, rmuser, password, clear password, dump protocols accounting |
|
Checking Software Versions and Device Statuses |
When show tcpdump(writefile parameter is specified), restore |
|
Software Management |
ppupdate, set license, erase license |
|
Log |
clear logging |
|
VXLAN |
dump protocols overlay |
|
Web Authentication |
commit web-authentication, set web-authentication html-files, clear web-authentication html-files |
|
MAC-based Authentication |
commit mac-authentication |
|
Policy-based Routing |
dump policy, dump protocols track-object |
|
DHCP Server Functionality |
dump protocols dhcp |
|
IPv4 Multicast Routing Protocols |
dump protocols ipv4-multicast, erase protocol-dump ipv4-multicast |
|
Routing Protocol Common to IPv4 and IPv6 |
dump protocols unicast, erase protocol-dump unicast |
|
IPv6 DHCP relay |
dump protocols ipv6-dhcp relay |
|
IPv6 DHCP Server Functionality |
dump protocols ipv6-dhcp server |
|
IPv6 Multicast Routing Protocols |
dump protocols ipv6-multicast, erase protocol-dump ipv6-multicast |
|
BFD |
dump protocols bfd |
#: User accounts for which no-flash parameter is specified in the operation-command adduser are not applicable.