IronPort Systems 4108GL - Manual (Page 96)

5-14
Switch Memory and Configuration
Using Primary and Secondary Flash Image Options
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Figure 5-8. Determining the OS Version in Primary and Secondary Flash
OS Downloads
The following table shows the switch’s options for downloading an OS to flash
and booting the switch from flash
Table 5-1. Primary/Secondary Memory Access
The different OS download options involve different copy commands, plus
xmodem , and tftp . These topics are covered in Chapter A, “File Transfers”.
Download Interruptions. In most cases, if a power failure or other cause
interrupts a flash image download, the switch reboots with the image previ-
ously stored in primary flash. In the unlikely event that the primary image is
corrupted, as a result of an interruption, the switch will reboot from secondary
flash and you can either copy the secondary image into primary or download
another image to primary from an external source. See Appendix A, “File
Transfers”.
1. In this example show
version indicates the
switch has version G.01.01
in primary flash.
2. After the boot system
command, show version
indicates that version
G.01.03 is in secondary
flash.
Action Menu CLI Web
Browser SNMP
Download to Primary Yes Yes Yes Yes
Download to Secondary No Yes No Yes
Boot from Primary Yes Yes Yes Yes
Boot from Secondary No Yes No Yes