Nortel Networks 100, 10 User Manual

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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
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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,
and recommendations in this document are believed to be accurate and reliable, but are presented with out express or implied warranty. Users must take full responsibility for their applications of any products specified in this document. The information in this document is proprietary to Nortel Networks Inc.
Trademarks
NORTEL NETWORKS is a trademark of Nortel Networks Inc. Accelar, BayStack, Bay Networks, Centillion, EZ LAN, Optivity, Optivity Campus, Optivity Enterprise, StackProbe,
and the Bay Networks logo are trademarks of Nortel Networks Inc. Microsoft, MS, MS-DOS, Win32, Windows, and Windows NT are trademarks of Micr osoft Corporation. All other trademarks are the property of their respective owners.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, Nortel Networks Inc. reserves the right to make changes to the pr oducts described in this document without notice.
Nortel Networks Inc. does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.
Nortel Networks Inc. Software License Agreement
NOTICE:
installing the hardware unit with pre-enabled software (each of which is referred to as “Software” in this Agreement). BY COPYING OR USING THE SOFTWARE, YOU ACCEPT ALL OF THE TERMS AND CONDITIONS OF THIS LICENSE AGREEMENT. THE TERMS EXPRESSED IN THIS AGREEMENT ARE THE ONLY TERMS UNDER WHICH NORTEL NETWORKS WILL PERMIT YOU TO USE THE SOFTWARE. If you do not accept these terms and conditions, return the product, unused and in the original shipping container, within 30 days of purchase to obtain a credit for the full purchase price.
1. License Grant.
personal, nonex clusive, nontransferable license : a) to us e the So ftw are eit her on a single c omputer o r, if applicable, on a single authorized device identified by host ID, for which it was originally acquired; b) to copy the Software solely for backup purposes in support of authorized use of t he Software; and c) to use and copy the associated user manual solely in support of authoriz ed use of th e Softwa re b y Licen see. Thi s license applies t o the So ftware o nly and d oes not extend to Nortel Networks Agent software or other Nortel Networks software products. Nortel Networks Agent software or other Nortel Networks software products are licensed for use under the terms of the applicable Nortel Networks Inc. Software License Agreement that accompanies such software and upon payment by the end user of the applicable license fees for such software.
2. Restrictions on use; reservation of rights.
Nortel Networks and/or its licensors retain all title and ownership in both the Software and user manuals, including any revisions made by Nortel Networks or it s licensors. The copyright notice must be reproduced and included wit h any copy of any portion of the Software or user manuals. Licensee may not modify, translate, decompile, disassemble, use for any competitive analysis, reverse engineer, distribute, or create derivative works from the Software or user manuals or any copy, in whole or in part. Except as expressly provided in this Agreement, Licensee may not copy or transfer the Software or user manuals, in whole or in part. The Software and user manuals embody Nortel Networks’ and its licensors’ confidential and proprietary intellectu al pro p erty. Licensee shall n ot sub lic ense, assign, or otherwise disclose to any third party the Software, or any information about the operation, design, performance, or implementation of the Software and user manuals that is confidential to Nortel Networks and its licensors; however,
Please carefully read this license agreement before copying or using the accompanying software or
Nortel Networks Inc. (“Nortel Networks”) grants the end user of t he Software (“Licensee”) a
The Software and user manuals are protected under copyright laws.
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Licensee may grant permission to its consultants, subcontractors, a nd agents to use the Softw are at Licensee’s facility, provided they have agreed to use the Software only in accordance with the terms of this license.
3. Limited warranty .
installed and operated on Nortel Networks hardware or other equipment it is originally licensed for, to function substantially as described in its accompanying user manual during its warranty period, wh ich begins on the date Software is first shipped to Licensee. If an y item of S oftware f ails to so function d uring its w arranty period, as the sole remedy Nortel Networks will at its discretion provide a suitable fix, patch, or workaround for the problem that may be included in a future Software release. Nortel Networks further warrants to Licensee that the media on which the Software is provided will be free from defec ts in materials and wo rkman ship under no rmal use for a peri od of 90 da ys from the date Software is first shipped to Licensee. Nortel Networks will replace defective media at no charge if it is returned to Nortel Netw orks during the warranty period along with proof of the date of shipment. This warranty does not apply if the media has been damaged as a result of accident, misuse, or abuse. The Licensee assumes all responsibility for selection of the Software to achieve Licensee’s intended results and for the installation, use, and results obtained from the Software. Nortel Networks does not warrant a) that the functions contained in the software will meet the Licensee’s requirements, b) that the Software will operate in the hardware or software combinations that the Licensee may select, c) that the operation of the Software will be uninterrupted or error free, or d) that all defects in the operation of the Softw are will be corrected . Nortel Network s is not obligated to remedy any Software de fect that cannot be reproduced with the latest Software release. These warranties do not apply to the Software if it has been (i) altered, except by Nortel Networks or in accordance with i ts instructions; (ii) used in conjunction with another vendor’s product, resulting in the de fect; or (iii) damaged by improper environment, abuse, misuse, accident, or negligence. THE FOREGOING WARRANTIES AND LIMITATIONS ARE EXCLUSIVE REMEDIES AND ARE IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Licensee is responsible for the security of its o wn d ata and in formatio n and fo r maintain ing ade quate pro cedures a part from the Software to reconstruct lost or altered files, data, or programs.
4. Limitation of liability.
ANY COST OF SUBSTITUTE PROCUREMENT; SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES; OR ANY DAMAGES RESULTING FROM INACCURATE OR LOST DATA OR LOSS OF USE OR PROFITS ARISING OUT OF OR IN CONNECTION WITH THE PERFORMANCE OF THE SOFTWARE, EVEN IF NORTEL NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF NORTEL NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT EXCEED THE PRICE PAID TO NORTEL NETWORKS FOR THE SOFTWARE LICENSE.
5. Government Licensees.
by or on behalf of the United States Government. The Software and documentation are commercial products, licensed on the open market at market prices, and were developed entirely at private expense and without the use of any U.S. Government funds. The license to the U.S. Government is granted only with restricted rights, and use, duplication, or disclosure by the U.S. Government is subject to the restrictions set forth in subparagraph (c)(1) of the Commercial Computer Software––Restricte d Rig hts cla u se o f FAR 52.227-19 and the limitations set out in this license for civilian agencies, and subparagraph (c)(1)(ii ) of the Rights in Technical Data and Computer Software clause of DFARS
252.227-7013, for agencies of t he Department of Defense or their successors, whichever is applicable.
6. Use of Software in the European Community.
European Community. If Licensee uses the Software within a country in the European Community, the Software Directive enacted by the Council of European Communities Directive dated 14 May, 1991, will apply to the examination of the Software to facilitate interoperability. Licensee agrees to notify Nortel Networks of any such intended examination of the Software an d may procure support and assistance from Nortel Networks.
7. Term and termination.
Nortel Networks’ copyright in the Software and user manuals will cease being effective at the date of expiration of the Nortel Networks copyright; those restrictions relating to use and disclosure of Nortel Networks’ confidential information shall continue in effect. Licensee may terminate this license at any time. The license will automatically terminate if Licensee fails to comply with any of the terms and conditions of the license. Upon termination for any
Nortel Networks warrants each item of Software, as delivered by Nortel Networks and properly
IN NO EVENT WILL NORTEL NETWORKS OR ITS LICENSORS BE LIABLE FOR
This provision applies to all Software and documentation acquired directly or indirectly
This provision applies to all Software acquired for use within the
This license is effective until terminated; howev e r, all of the restrictions with respect to
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reason, Licensee will immediat ely destroy or return to Nortel Networks the Software, user manuals, and all copies. Nortel Networks is not liable to Licensee for damages in any form solely by reason of the termination of this license.
8. Export and Re-export.
or information without first obtaining any required export licenses or other governmental approvals. Without limiting the foregoing, Licensee, on behalf of itself and its subsidiaries and affiliates, agrees that it will not, without first obtaining all export licenses and approvals required by the U.S. Government: (i) export, re-export, transfer, or divert any such Software or technical data, or any direct product thereof, to any country to which such exports o r re -exports are restricte d or em b argoed under United State s e x port control laws and re gulations, or to any nation al or re sident of such restricted or embargoed countries; or (ii) provide the Software or related technical data or information to any military end user or for any military end use, including the design, development, or production of any chemical, nuclear, or biological weapons.
9. General.
jurisdiction, the remainder of the provisions of this Agreement shall remain in full force and effect. This Agreement will be governed by the laws of the state of California.
Should you have any questions concerning this Agreement, contact Nortel Networks, 2375 N. Glenville Dr., Richardson, TX 75082.
LICENSEE ACKNOWLEDGES THAT LICENSEE HAS READ THIS AGREEMENT, UNDERSTANDS IT, AND AGREES TO BE BOUND BY ITS TERMS AND CONDITIONS. LICENSEE FURTHER AGREES THAT THIS AGREEMENT IS THE ENTIRE AND EXCLUSIVE AGREEMENT BETWEEN NORTEL NETWORKS AND LICENSEE, WHICH SUPERSEDES ALL PRIOR ORAL AND WRITTEN AGREEMENTS AND COMMUNICATIONS BETWEEN THE PARTIES PERTAINING TO THE SUBJECT MATTER OF THIS AGREEMENT. NO DIFFERENT OR ADDITIONAL TERMS WILL BE ENFORCEABLE A GAINST NORTEL NETWORKS UNLESS NORTEL NETWORKS GIVES ITS EXPRESS WRITTEN CONSENT, INCLUDING AN EXPRESS WAIVER OF THE TERMS OF THIS AGREEMENT.
If any provision of this Agreement is held to be invalid or unenforceable by a cour t of competent
Licensee agrees not to export, directly or indirectly, the Software or related technical data
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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
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 Online Documentation” (page 6)
“New Features” (page 7)
•“Bug Fixes (page7)
“Known Restrictions” (page 8)
“Known Prob lems” (page 13)
“Connecting to Accelar Gigabit Po rts” (page 14)
“1000BASE- LX Conne cto rs ” (page 15)
“Network Management” (page 16)
*
450 Switch that may not be included in the related user guide
(Part number

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 la ter)
To access the software images, see “Accessing the Software Images” on page 5.
must upgrade all units
installing the BayStack 400-ST1 Cascade Modules.
before
will not operate
with BayStack 450 software version
with BayStack 450
earlier than
1
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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 indicat es a f ail ed im age lo ad a s foll o w s: An al te rnati ng LED patt ern i s 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 happ ens, cycle the s witch power (power off the switch, then power it on). Use the Software Download screen to download the new boot code image. After the boot co de image download completes, download the new agent image.

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.
For more informat ion about mixed s tack upgrad es, see the Business Pol icy Switch 2000
User’s Guide
.
must be
1
In this document, the term “mixed stack” refers to a stack configuration that includes BayS tack 400 Series switches (BayStack 450 switches and BayStack 410-24T switches) Switches.
2
and
one or more Business Policy
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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 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
Note:
When you upgrade to software version software version V4.0.0, you
should also obtain a copy of
(Part number 309978-D Rev 00). That user guide provide s inf or m ati on
Switch
Using the BayStack 450 10/100/1000 Series
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.
311523-C Rev 00
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 faci lity may not function properly. To correct this situation, remove the BayStack 400-ST1 Cascade Module and upg r ade the softw are properly before reinstalling it.
If you try to download the ag ent image
you download the boot code
before
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.
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Release Notes for the BayStack 450 10/100/1000 Series Switch

Creating a Mixed Stack

When creating a mixed stack that includes one or more more Business Policy Switch 2000
1.
Upgrade your BayStack 450 switches and your BayStack 410-24T
*
switches1, complete the following steps:
switches to software version V4.0.0:
Confirm that all of the switches you intend to use in your new stack have the same ISVN numbers. Upgra de all swit ches t hat have incorrect IS VN numbers (see your switch’s
User’ s Guide
for information abo ut I SVN ve rs ion number s
and upgrade details).
2.
Power down all BayStack 450 switches and BayStack 410-24T switches.
3.
Set the Unit Select switch for all BayStack 450 switches and BayStack 410-24T switches to the “Off” position (Off = Down).
4.
Set the Unit Select switch on o ne of your Business Pol icy Swi tches only, to the “Base” position (Base = Up).
5.
Set the Stack Mode value for all Business Policy Switches to “Hybrid” mode.
See your Business Policy Switch
6.
Use the Reset command to reset all Business Policy Switches.
7.
Power down all units.
User Guide
for details.
8.
Ensure that all cas cade cables ar e connec ted prope rly, and then power up the stack.
See your Business Policy Switch
User Guide
for details on managing your
stack.
See your switch’s
User Guide
for additional details about creating mixed stack
configurations.
1
The terms “Nortel Networks Business Policy Switch 2000” and “Business Policy Switch” are used interchangeably in this document.
4
311523-C Rev 00
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Accessing the Software Images

You can access the software image files directly from the Internet:
Note:
When upgrading the switch, you must download
code image
1.
Go to www25.nortelnetworks.com/software.
2.
Under the Switching Products (or Data and Internet) heading, select BayStack Switches - 450 10/100/1000 Switch, then click the Go button.
3.
Under the Operational Softwar e headin g, click on BayStack 450 Etherne t Switch boot code V4.0.0.
Follo w the prompts to do wnl oad the BayStack 450 boot code image. The boot code image file name is
4.
After the BayStack 450 boot code image is downloaded, click on BayStack 450 Ethernet Switch agent V4.0.0.
Follow the prompts to download the BayStack 450 agent image. The agent image file name is
(the firmware) and the
b4504001.img.
b4504002.img.
agent image
Accessing the Software Images
two images
, the
boot
(the software).
For detailed i nformation about downloading a new software image, see Chapter 3, “Using th e Console Int erfa ce,” in
Series Switch
.

Upgrade Restrictions

The following restrictions apply when you upgrade the switch to software version V4.0.0:
When you upgrade a stack configuration (running software versions earlier
than V2.0) that uses a Gigabit distributed trunk for the uplink to the TFTP server, you must first disable the MultiLink Trunk at both ends.
When you upgrade a stack configuration that contains a BayStack 410-24T
unit (which is conf i gured with at least one distributed trunk member), and the distributed trunk is the uplink to the TFTP server, you must first disable the MultiLink Trunk at both ends.
311523-C Rev 00
Using the BayStack 450 10/100/1000
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Release Notes for the BayStack 450 10/100/1000 Series Switch
The switch cannot be upgr ade d to software version V4.0.0 through a port that
is configured for software version V2.0
traffic unless your switches are
tagged
or later
.
currently
running
If your switches ar e cu rrently running software versions
earlier
than software version V2.0, you must upgrade your switch to software version V4.0.0 through a port that is configured as an
untagged
member of VLAN 1. (Software versions V2.0 and later, now support upgrades to future versions over VLANs other than VLAN 1, with tagged or untagged ports.)
When the BayStack 450 swi tch i s upgra ded wit h th e ne w b oot cod e image, all existing entri es in t he Event Log are erased. This corrects a pot ential problem with an ear lier software version. A new entry i s written to th e Event Log confirming the upgrade of the boot code image.
When you upgrade a
mixed stack
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.
For more information about mixed stack upgrades, see the Business Policy Switch 2000
User’s Guide
.
During the load process, the ports are configured as follows:
-- Twisted-pair ports: autonegotiation enabled
-- Fiber optic ports: 100 Mb/s, half-duplex
-- Gigabit MDA ports: autonegotiation disabled, Preferred Phy set to Right

Nortel Networks Online Documentation

To be sure you have the latest updates to your product documentation, including these release notes, visit the Nortel Networks
www25.nortelnetworks.com/library/tpubs/
Find the product for which you need documentation. Then locate the specific category and model or version for your hardware or software product. Using Adobe Acrobat Reader , you ca n open the manuals a nd release notes, s earch for the sections you need, and print them on most standard printers. You can download Acrobat Reader fre e f r om t he Adobe Systems Web site, purchase selected documenta tion set s, CDs, and te chnica l publi catio ns th ough the Internet at the
6
www1.fatbrain.com/ docu ment ati on/ nor te l/
*
Web site at:
www.adobe.com.
Web address.
You can
311523-C Rev 00
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New Features

The following new features are provided with software version V4.0.0:
Extensible Authentication Protocol Over LANs (EAPOL) -- Allows future
Gigabit Int erface Converter (GBIC) MDA support -- The new
Automatic PVID selection option -- If enabled, when you assign a port to a

Bug Fixes

The following problems are corrected with software version V4.0.0:
If you hav e security e nabled o n an MLT and an intrusion is detect ed, t he MLT
New Features
operating systems to authenticate a user on a given port, and then allows that user access to other network services through that port. Your BayStack 450 switch serves the role of "Authenticator" in an EAPOL protected network.
Nortel Networks 450-1GBIC MDA is supported by software version V4.0.0.
VLAN, your BayStack 450 swit ch aut omatica lly s ets the PVID o n that po rt t o match the new VLAN number.
ports will become disable d. To enable the MLT members, enable any member of that MLT.
311523-C Rev 00
The following SNMP traps are now supported: stpTopologyChange and stpNewRoot.
SNMP traps are now visible through routers.
System exception errors no longer occur when using RADIUS authentication to protect TELNET sessions.
TFTP errors no longer occur when you attempt to save system configura ti ons to TFTP servers that are several hops from your switch.
Setting an RMON threshold no longer causes problem when using Optivity's Threshold Manager.
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Release Notes for the BayStack 450 10/100/1000 Series Switch

Known Restrictions

The following known restrictions apply to software version V4.0.0 (and earlier versions):
Software version V4.0.0 does not support IGMP-v2 leave messages.
Software version V4.0.0, running on Rev B hardware (HW: RevB in the System Characteristics screen), does not support the BayStack 450-2M3/2S3 MDAs (ATM MDAs).
Limited support for EAPOL TLS Certificates TLS certificates are supported in mixed stacks only. MD5-Challenge
authenticatrion is supported in all configurations.
Mixed stack configurations The following restrictions apply to mixed stack configurations:
-- If you are managing your mixed stack using a console interface, connect
the console to a Business Policy Switch.
-- Management VLAN functionality is operational only through ports that
are configured as both “ingress” and “egress” members for the management VLAN.
-- The following BayStack 450 switch features are not available in a mixed
stack configuration:
- SNMP Security
- Save Current Settings
- Support for the BayStack 450-2M3/2S3 MDAs (ATM MDAs)
System reset due to MultiLink Trunking reconfiguration If you add a new unit, that is configured with at least one bounded trunk
(with no distributed trunks
2
), into a stack that is configured with one or more distributed trunks, the new unit automatically resets before entering the operational mode of the stack.
1
Bounded trunk: an active trunk with al l trunk members configured on the same m odule.
2
Distributed trunk: an active trunk with trunk m em bers configured on at least two different uni ts wit hi n a single stack.
8
1
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Known Restrictions
MultiLink Trunking MultiLink T runking allo ws you to g roup ports of v aryi ng speeds (for example,
you can group 10 Mb/s, 100 Mb/s, and 1000 Mb/s ports in any combination). Although this is a valid configuration , Nort el Networks recommends that you only group ports of equivalent speeds when configuring a trunk. The MultiLink Trunk algorithm distributes connections across all of the available links in the trunk, regardle ss of speed.
Monitoring outgoing frames on trunk member ports When you monitor outgoing frames on a full-duplex port that is a MultiLink
trunk member, Nortel Networks recommends that you use the address-based mirroring mode. If you use port-based mirroring with this type of configuration, some frames may not be displayed.
MultiLink Trunking interoperability with Accelar
*
When a Distributed MultiLink Trunk (DMLT) is connected to an Accelar switch, and you reset one of the st ac k uni ts or change the spanning tree status of the DMLT, each unit sends out a (standalone) BPDU frame through the DMLT port. This can cause Accelar switches with software versions prior to V2.0.5 to disable the DMLT.
311523-C Rev 00
If this happ ens, reset th e Accelar swi t ch. If resetting the Accelar switch does not correct the problem, contact your Nortel Networks Technical Solutions Center (see “How to Get Help” in
).
Switch
Using the BayStac k 45 0 10/100/1 000 Seri es
BayStack switches automatically calculate the path cost for any given port, based on the port’s speed and duplex settings. If you manually change the path cost setting, the switch no longer automatically calculates the path cost for that port.
Spanning Tree Participation value disabled for monitor port When you use the Port Mirr oring fe ature in a st andalone switch con f igurat ion,
the Spanning Tree Participation value for the monitor port is automatically set to Disabled. If you then insert the same standalone switch into a stack, the Spanning Tree Participation value for the previously configured monitor port
remains
Disabled. You must manually reset the Spanning Tree Participation value to Normal Learning or Fast Learning using the Spanning Tree Port Configuration scr ee n.
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Release Notes for the BayStack 450 10/100/1000 Series Switch
IEEE 802.1D spanning tree parameters Spanning tree parameters cannot be configured from the console interface
(CI) menus and screens. Configuration support is available through the Bridge MIB using Simple
Network Management Protocol (SNMP). Refer to RFC 1493 for more information.
The spanning tree conf igurati on must be the same on bot h ends of a MultiLi nk trunk.
Spanning tree port participation The Fast Learning value (used with the Participation field in the Spanning
Tree Port Configuration screen) is the same as the Normal Learning value, except that the state transition timer is shortened to two seconds.
Nortel Networks recommends using the Fast Learning value to optimize switch-to-endstation connections. When you connect one switch to another switch, the Normal Learning (default) value provides the best results.
MAC address-based security learning process If you mov e a device from one port t o a nother during the MAC address-based
security learning pro cess, the de vice’s MAC address will move t o the new por t and will no longer be allowed on the original port. A given MAC address can be learned on only one port at a time.
10
The BayStack 450-2M3 and the BayStack 450-2S3 MDAs do not support MAC-based security, Autotopology protocol, and EAPOL.
You cannot assign an
untagged
port to multiple pr otocol VLANs tha t ha v e the
same protocol ID.
Redundant gigabit Phy You cannot use the redun dant gigabit Phy port ( the backup Phy port) to create
two different paths.
Autonegotiation restriction with gigabit ports The BayStack 450 switch’s gigabit MDA ports comply with IEEE 802.3z
Draft 3.2 and IEEE 802.3z Draft 4.1; however, the following restriction applies to the autonegotiation feature:
-- Autonegotiation does not restart if an invalid code word is received from the
link partner during the autonegotiation process. In cases where autonegotiation fails, disable and then enable autonegotiation.
311523-C Rev 00
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RMON Alarms and Event entries
Known Restrictions
RMON Alarms and Event entries are
saved to nonvolatile random access
not
memory (NVRAM). When a reset conditio n or power-down se quence occurs, the entries are not pr eserve d. This conforms t o the current RF C 1757 standard. All RMON Alarms and Events must be reentered.
RMON Event Log table’s secondary index The RMON Event Log table’s secondary index is not incremented when all of
the table’ s entries ha v e been used . In this cas e, the e xisting i ndex es are r eused. Thus, the index number cannot be used to indicate the total number of log entries received.
RMON Histo ry Control entr ies A maximum of 85 RMON History Control entries per stack unit are
supported. The entry exists on the unit containing the “ControlDataSource.”
Changing from a stack unit to a standalone switch When you change a switch from a stack unit into a standalone switch, or vice
versa, the IP address of the switch/stack changes. As a result, all existing management applications that use the previous IP address are lost until you reconnect using the new IP address.
Console may display a blank screen When you connect a console terminal to an operating switch through the
Comm Port, the console may display a blank screen. This is a normal condition. Press [Ctrl]-C to refresh the screen or, to get beyond the Nortel Networks logo screen, press [Ctrl]-Y.
311523-C Rev 00
Adding or removing stack units When you add a new unit to the stack or remove an existing stack unit, you
will not be able to perform IP management functions for approximately 30 seconds.
During this time period, the following can occur:
-- Packets are lost when performance testing with SmartBits or any other
traffic generator.
-- IP Multicast streams stop receiving.
-- TELNET sessions time out and users lose their TELNET connection
without warning. Users must re-establish lost TELNET sessions.
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Release Notes for the BayStack 450 10/100/1000 Series Switch
-- ICMP echo (PING) requests do not receive responses.
-- All IP-related processes fail temporarily.
Tagged bridge protocol data units (BPDUs) Tagged BPDUs are not supported in this version.
Network interface controllers (NICs) The MultiLink Trunking feature supports only multiport NICs that are
configured as a single MAC address, single IP address entity.
Downgrading a switch or stack to a software version earlier than software version V1.3.
Note:
Software versions earlier than software version V1.3 do not support distributed trunking. You must remove any distributed trunks before you downgrade the switch to sof tware versions earlier than so ftware version V 1.3 or problems will occur.
If you must downgrade a switch from software version V1.3 (or later) to an earlier versi on, you must f irst remo ve an y ex isting dis trib uted tr unks using the MultiLink T runk Conf iguration sc reen. You can remov e the trunk b y disabli ng the trunk and setting all the trunk members to none [blank field].
12
If you downgrade a switch with a bounded MultiLink trunk from software version V1.3 (or late r) to an e arli er v ers ion , some p orts ma y bec ome disa ble d. If this happens, you can enable the ports again using the Port Configuration screen.
Configuring port mirroring monitor ports
Nortel Networks recommends that you configure the port mirroring monitor port to be on the same stack unit as the mirrored ports.
Monitoring outgoing frames on a gigabit Ethernet port
When you monitor outgoing frames on a gigabit port, the multicast frames that are generated by the switch (for example, BPDUs, Autotopology, and IGMP) will not be seen on the monitor port.
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Downgrading your BayStack 450-12F switch
You cannot downgrade your BayStack 450-12F switch or a stack configuration that contains a BayStack 450-12F switch, to a software version earlier than sof tware version V1.3. Software versions earli er than V1.3 do not support the BayStack 450-12F switch.
Software versions earlier than V3.1.0 do not support:
-- Mixed stacks that include Business Policy Switches
-- BayStack 450-2M3/2S3 (ATM MDAs).
Stack reset when creating the first DMLT
When you create your first DMLT using SNMP management, your stack can reset without warning. This reset is required to enable only the first DMLT in a stack.

Known Problems

The followi ng problem s are kno wn to e xist in softw are v ersio n V4.0.0 (and earl ier versions):
Known Problems
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If you are running IGMP multicast traffic over a DMLT while the IGMP
snooping feature is disabled, the IGMP traffic that is received on one link of the DMLT will be looped back onto another link of the trunk.
To break the loop, disconnect one link of the DMLT or enable the IGMP snooping feature.
When using 1000BASE-XD and 1000BASE-ZX (long-haul) GBICs in your
450-1GBIC MDA, the System Characteristics screen GBIC devices as “Unsupported.” However, the GBIC devices operate properly and pass traffic correctly.
•MDAs must be
secure the MDA in the chassis by the MDA front panel.
A link state cannot be established when you connect a cable that is 100
percent utilized into a BayStack 450 switch port. As soon as a break in the traffic occurs, the l i nk state is established.
firmly secured
in the chassis for proper operation. Be sure to
tightening the two thumbscrews on
firmly
incorrectly
shows the
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Release Notes for the BayStack 450 10/100/1000 Series Switch
When mirroring a single ML T member , the monitor port will receive all of the
unknown unicast traffic that is transmitted over the entire MLT.
When you connect the BayStack 450 switch to an Alteon network interface
controller (NIC), the switch learns invalid MAC addresses whenever autonegotiati on for a gigabit MDA port is enabled (the in val id MA C addresses eventually age out). This problem occurs only when you reset the switch (via the console interface main menu or during a power cycle) and does not affect the correct operation of the BayStack 450 switch.

Connecting to Accelar Gigabit Ports

The BayStack 450 switch supports gigabit MDA port connections to the Nortel Networks Accelar switch gigabit ports, with the following restrictions:
Autonegotiation
Version
GMAC 2
supported on the Accelar 1000BaseSXWG (ASIC
is not
).
When connecting to this v ers ion, disa ble au tone gotiati on on the BayStack 450 switch’s gigabit MDA port.
Autonegotiation is supported on the Accelar 1000BaseSXWG (ASIC Version
GMAC 4
).
When connecting to this version, set autonegotiation to enabled (or disabled) at both ends of the communications link. The autonegotiation setting must be identical at both ends of the communications link.
You can determine the ASIC version num ber for the 1000BaseSXWG gi gabit card using the following command from the Accelar console port:
Accelar-1100# sh sys info
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1000BASE-LX Connectors

The 1000BASE-LX (gigabit) MDAs use a longwave 1300 nm, fiber optic transceiver to connect devices over single-mode (5 km/3.1 mi) or multimode (550 m/1,805 ft) fiber optic cables.
Note:
The transcei ver must be mode condi tioned e xter nally v ia a sp ecial o f fset SMF/MMF patch cord for 1000BASE-LX multimode applications. The offset SMF/MMF patch cord allows the same transceiver to be used for both multimode and single-mode fiber. See your Nortel Networks sales representative for mo re information about the SMF/MMF patch cord.
The optical perf or ma nce of this transceiver cannot be guaranteed when connected to a multimode fiber plant without the use of the special offset SMF/MMF (mode conditioning) patch cord.
The 1000BASE-LX MDA transceiver is designed to mechanically accommodate the
single-mode ferrules
cord.
Multimode ferrules
1000BASE-LX Connectors
used on one end of the special offset SMF/MMF patch
can bind and cause damage to the transceiver.
311523-C Rev 00
Caution:
Do not connect multimode cables directly into the 1000BASE-LX MDA transceiver. Connect a special offset SMF/MMF patch cord into the transceiver, then connect the multimode cable into the SMF/MMF patch cord.
For more information about gigabit transmission over fiber optic cable and mode conditioning, refer to :
Reference Note: Gigabit Ethernet Physical Layer Considerations
(Part number 201540-B). The publication is available on the World Wide Web at
library/tpubs/.
At the Web site, click on Accelar under the Routing Switches
support.baynetworks.com/
heading.
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Release Notes for the BayStack 450 10/100/1000 Series Switch

Network Management

Table 1 lists the supported network management applications that are available:
Table 1. Supported Network Management Applications
BayStack 450 Software Versions
Application
V2.0.0/V2.0.1
(HW Rev B, D, L)
NMS 9.0 Partial support only
(see Note)
NMS 9.0, with
9.0.0.2 patch NMS 9.0.1
NMS 9.0.1.1
1
1
1
Device Manager
Yes Yes Yes Yes
Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No
V3.0.0
(HW Rev B, D, L)
Partial support only
(see Note)
V3.1.0
(HW Rev B, D, L)
Partial support only
(see Note)
V4.0.0
(HW Rev B, D, L)
Partial support only
(see Note)
3.0.3
Device Manager
Y es Yes No No
3.0.4.1
Device Manager
Yes Yes Yes (No ATM support) No
4.0.0
Device Manager
Yes Yes Ye s No
4.2.0
Device Manager
Y es Y es Y es Y es
5.0.0
Switch Manager
V1.0
Partial support only
(VLAN only)
Partial support only
(VLAN only)
Partial support only
(VLAN only)
Yes
Switch Manager
V1.1 Yes Yes Yes Partial support only
NCS V2.2
1
Requires installation of the appropriate version Optivity Integr ati on Toolkit (OIT) for the BayStac k 450 (see “OIT Support for Multiple Software Versions” on page 17).
2
Requires installation of the appropriate version NCS Optivity Integration Toolkit (OIT) for the BayStack 450 switches.
2
Yes Ye s Ye s Yes
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Note:
Optivity NMS 9.0 p rovides partial su pport only for these switch versions. For a list of Optivity modules or components that support the BayStack product, see
System 9.0 for Solaris and Windows NT
Release Notes for Optivity Network Management
(Part number 205970-A). You can
obtain a copy of the Optivity 9.0 release notes at:
support.baynetworks.com/library/tpubs/nav/netman/nms.htm#OPTN90.

OIT Support for Multiple Software Versions

The Optivity Integration Toolkit (OIT) files are designed to support specific versions of the BayStack 450 switch software. If your networking environment requires you to support multiple BayStack software versions (for example, BayStack software version V2.0 on some devices and BayStack software version V4.0.0 on other devices), you must hav e bot h versions of the supporting OIT files loaded onto your Network Management Station (NMS).
Network Management
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