• on the external Flash, enter slot0:// followed by the 
filename
• on a TFTP server, enter tftp://hostip/filepath
Defaults Not configured
Command Modes CONFIGURATION
Command History
Version 7.5.1.0 Introduced on C-Series
E-Series Original command
Usage 
Information
To display these changes in the show bootvar command output, save the running 
configuration to the startup configuration (using the copy command) and reload the system.
Related 
Commands
change bootflash-image – changes the primary, secondary, or default boot image 
configuration.
boot system gateway – specifies the IP address of the default next-hop gateway for the 
management subnet.
boot system (S4810 and Z9000)
Tell the system where to access the FTOS image used to boot the system.
Z-Series, S4810
Syntax
This command was deprecated in FTOS 8.3.12.0.
boot system {gateway ip address| stack-unit [{0-11 | 0-7]| all] 
[default | primary {system {A: | B:} | tftp: | | secondary]}
To return to the default boot sequence, use the no boot system command.
Parameters
gateway Enter the IP address of the default next-hop gateway for the 
management subnet.
stack-unit Enter the stack-unit number for the master switch.
ip-address
Enter an IP address in dotted decimal format.
0-11, 0-7, all
Enter the stack-unit number. The S4810 range is 0 to 11. The Z9000 
range is 0 to 7.
default Enter the keyword default to use the primary FTOS image.
primary Enter the keyword primary to use the primary FTOS image.
secondary Enter the keyword secondary to use the primary FTOS image.
tftp:
Enter the keyword TFTP: to retrieve the image from a TFTP server. 
tftp://hostip/filepath.
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