INS_CNGE11FX3TX8MS[POE][HO] Rev. 11.6.17 PAGE 296
INSTRUCTION MANUAL
CNGE11FX3TX8MS[POE][HO]
TECH SUPPORT: 1.888.678.9427
Working with Software Images
The system can store up to two software images in flash. The image selected for bootup is termed
the Active image, while the other is termed the Alternate image.
It is possible to swap the Active and the Alternative image, and it is possible to upgrade to a new
Active image. A swap simply switches the Active and Alternate designation on each image and
reboots the system.
A firmware upgrade performs these steps:
»
Download new firmware using TFTP/HTTP/HTTPS/FTP and verify suitability for the system
»
Overwrite the current Alternate image with the newly downloaded image
»
Swap Active and Alternate and reboot
The result is that the old Active build becomes the Alternate, and the newly downloaded image
Active. The relevant commands are:
show version
firmware swap
firmware upgrade protocol tftp://server[:port]/path_to_file show version lists various details about
the system, including the images in flash.
