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The Upgrade Process
311523-C Rev 00
3
Important Considerations
When you upgrade your BayStack 450 switch:
• Download
two images
(the
boot code image
and the
agent image
). The new
boot code image must be downloaded
before
the agent image is downloaded.
• After upgrading your units, verify that the firmware and software versions,
and the Interoperability Software Version Number (ISVN) is correct in the
sysDescr field of the System Characteristics screen:
-- The correct firmware version is: FW:V1.48
-- The correct software version is: SW:v4.0.0
-- The correct ISVN number is: 2
Recovering from a Failed Upgrade
The upgrade process is a fairly straightforward process when implemented
correctly. However, if you do not follow the correct steps to upgrade your switch,
the switch can become temporarily disabled.
• If you install a BayStack 400-ST1 Cascade Module before you upgrade the
switch to software version V1.1.0 (or later), the code load facility may not
function properly. To correct this situation, remove the BayStack 400-ST1
Cascade Module and upgrade the software properly before reinstalling it.
• If you try to download the agent image
before
you download the boot code
image, the upgrade may fail: The agent software can detect an incompatible
revision and will discontinue programming itself into FLASH memory. This
condition is indicated by a steady pattern of alternating LEDs.
The switch will not automatically reset. To recover from this condition, you
must cycle power to the switch, upgrade the boot software, and then upgrade
the agent software.
Note:
When you upgrade to software version software version V4.0.0, you
should also obtain a copy of
Using the BayStack 450 10/100/1000 Series
Switch
(Part number 309978-D Rev 00). That user guide provides information
about using the new software version V4.0.0 features. See “Nortel Networks
Online Documentation” on page 6 to get the latest version of the user guide.