Cabletron Systems ZX-250 manual Upgrading Boot Load Software, Boot Prom, Flash RAM

Switch Administration

Image is downloaded into boot PROM by df b chpi sets which is the default boot image

Upgrading and Changing Software

POST is downloaded into flash RAM by df p

ponf turns POST on and off.

initial routines

boot image 0 boot image 1

MAC addresses

configuration storage

boot PROM

Cleared by clfs

Switch software is downloaded to flash RAM by df s

POST diagnostics

SmartCell ZX-250 switch operating software

go runs switch software in

DRAM

flash RAM

Figure 4-4 Memory locations affected by the boot load commands

4.7.3Upgrading Boot Load Software

Two images of the boot load software reside in flash RAM. The two images are identified as boot load image 0 and boot load image 1. Both boot load images can be upgraded by using a TFTP/Bootp server. However, an upgrade is always written over the boot load image that is not currently running. This insures that if a boot load upgrade fails, there is still one good boot load image to fall back on.

Follow the steps below to upgrade the switch boot load software. s• Set up the TFTP/Bootp server software on a workstation.

¢• Connect both the TFTP/Bootp server and the SmartCell ZX-250 to your Ethernet network. Make sure that the TFTP/Bootp server can be reached by the SmartCell ZX-250 Ethernet interface.

••Connect a dumb terminal (or PC running terminal emulation software) to the SmartCell ZX-250 Terminal port.

T• Copy the SmartCell ZX-250 boot load software image into the appropriate location on the TFTP/Bootp server. (In this example, the software is copied to c:\tftpboot\images\boot.ima.)

SmartCell ZX-250 User Guide 4-25