Lucent Technologies P550 - Manual (Page 285)

Cajun P550/P220 Switch Operation Guide 18 -1
18
Downloading New Operational Code to
the Switch (Layer 2 & Layer 3)
Overview
This chapter and its procedures are common to both Layer 2 and Layer 3 configuration.
Included in this chapter:
❒ Upgrading from a Previous Version
❒ Downloading the Image
❒ Selecting the Image for Reboot
❒ Resetting the Switch
Upgrading from a Previous Version
Version 4.0 of the Cajun P550 switch handles configuration files differently from version
3.0 and 3.1. In version 4.0, all configuration information is contained in a
startup.txt
file that is stored in NVRAM on the switch. Previous versions used *.cfg files that
contained information about multiple types of configuration data.
In many cases, when you upgrade the embedded software of the switch from version 3.0
or 3.1 to version 4.0, the earlier version of the software is located in the APP1 memory
location on the switch, and you install the version 4.0 software image into APP2. If you
want to retain version 3.0 or 3.1 on the switch for a potential downgrade: before you
decide where to install the version 4.0 software image, find out which APP you booted
from, then load the new image into the other APP. For example, if you boot version 3.0
or 3.1 from APP1, download version 4.0 into APP2.