Cabletron Systems SmartCell ZX-250, User Manual

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SmartCell ZX-250 User Guide 4-25
Switch Administration Upgrading and Changing Software
Figure 4-4 Memory locations affected by the boot load commands
4.7.3 Upgrading 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.)
initial boot routines
boot image 0
boot image 1
MAC addresses
configuration storage
POST diagnostics
SmartCell ZX-250 switch
operating software
flash RAM
boot PROM
Image is downloaded into boot PROM by
df b
Cleared by
clfs
chpi
sets which is the default boot image
POST is downloaded into
flash RAM by
df p
ponf
turns POST on and off.
Switch software is downloaded
to flash RAM by
df s
go
runs switch software in
DRAM