Nortel Power Branch Package 10, 100, BayStack 450 10, BayStack 450 100, BayStack 450 1000 Release Notes

Software Release V4.0.0
Part No. 311523-C Rev 00

March 2001
4401 Great America Parkway

Santa Clara, CA 95054

Release Notes for the
BayStack 450 10/100/1000
Series Switch

*311523-C Rev 00*

Copyright © 2001 Nortel Networks

All rights reserved. March 2001.
The information in this document is subject to change without notice. The statements, configurations, technical data,

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311523-C Rev 00

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311523-C Rev 00

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311523-C Rev 00

Introduction

These release notes contain important information about software version V4.0.0
for the BayStack

Using the BayStack 450 10/100/1000 Series Switch

*

450 Switch that may not be included in the related user guide

(Part number
309978-D Rev 00). The information in these release notes supersedes the
applicable information in the user guide.

These release notes contain the following sections:

• “Upgrading the BayStack 450 Firmware” (page 1)

• “The Upgrade Process” (page 2)

• “Creating a Mixed Stack” (page 4)

• “Accessing the Software Images” (page 5)

• “Upgrade Restrictions” (page 5)

• “Nortel Networks Onli ne Documentation” (page 6)

• “New Featur es” (page 7)

•“Bug Fixes” (page7)

• “Known Restrictions” (page 8)

• “Known Problems” (p age 13 )

• “Connecting to Accelar Giga bit Ports” (page 14)

• “1000B ASE- LX Conne cto rs ” (page 15)

• “Network Management” (page 16)

Upgrading the BayStack 450 Firmware

The BayStack 450 firmware provides a code load facility that allows you to
upgrade the software image over any switch port, including any MDA ports.

311523-C Rev 00

The BayStack 400-ST1 Cascade Module
switches that are configured with BayStack 450 software versions
version V1.1.0. You
V1.1.0 (or later)

must upgrade all units

before

installing the BayStack 400-ST1 Cascade Modules.

To access the software images, see “Accessing the Software Images” on page 5.

will not operate

with BayStack 450 software version

with BayStack 450

earlier than

1

Release Notes for the BayStack 450 10/100/1000 Series Switch

The Upgrade Process

Upgrading the BayStack 450 switch to software version V4.0.0 is a two-step
process:

1.

Download the boot code image.

2.

Download the agent image.

To properly upgrade the BayStack 450 switch, the boot code image

downloaded first

, before you download the agent image. If the agent image (the
operational software) is downloaded before the boot code image, the software
may not be programmed into the BayStack 450 switch FLASH memory.

The switch indic ates a fa iled image load a s foll ows: An alternating LED patter n is
displayed on the BayStack 450-24T 10/100 status LEDs (ports 13 to 24), on the
BayStack 450-12T 10/100 status LEDs (ports 1 to 12), and on the BayStack
450-12F Link status LEDs (ports 1 to 12).

If this happens, cycle t he switch p ower (power off the switch, then power it on).
Use the Software Download screen to download the new boot code image. After
the boot code image down load completes, download the new agent im age.

Upgrading to Software Version V4.0.0 in a Mixed Stack

When you upgrade a mixed stack1 to software version V4.0.0, you must first
upgrade the agent code, before you upgrade the boot block. Although this is the
inverse of the normal upgrade procedure, it is necessary to ensure a successful
software upgrade.

must be

For more inf ormation about mix ed stack upg rades, see the Busines s Policy Switch
2000

User’s Guide

1

In this document, the term “mixed stack” refers to a stack configuration that includes BayStack 400 Series
switches (BayStack 4 50 switches and BayStack 410-24T switches)
Switches.

2

.

and

one or more Business Policy

311523-C Rev 00

Important Considerations

When you upgrade your BayStack 450 switch:

The Upgrade Process

• Download

two images

(the

boot code image must be downloaded

• After upgrading your units, verify that the firmware and software versions,

and the Inte roperability 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

Note:

should also obtain a copy of

Switch

When you upgrade to soft ware version software version V4.0.0, you

Using the BayStack 450 10/100/1000 Series

(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.

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.

boot code image

before

and the

agent image

). The new

the agent image is downloaded.

• If you install a BayStack 400-ST1 Cascade Module before you upgrade the

switch to software version V1.1.0 (or later), the co de 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 tr y to download the agent image

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 stea dy 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.

311523-C Rev 00

before

you download the boot code

3