Cabletron Systems SmartSTACK ELS100-24TXG User manual

SmartSTACK 100
ELS100-24TXG
ETHERNET SWITCH
INSTALLATION
AND
USER GUIDE

NOTICE
Cabletron Systems reserves the right to make changes in specifications and other informa-
tion contained in this document without prior notice. The reader should in all cases consult
Cabletron Systems to determine whether any such changes have been made.
The hardware, firmware, or software described in this manual is subject to change without
notice.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDI-
RECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT
NOTLIMITEDTOLOSTPROFITS)ARISINGOUTOFORRELATEDTOTHISMANUALOR
THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN AD-
VISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAG-
ES.
© Copyright 1999 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Part Number: 9032947 January 1999
ELS100-24TX is a trademark of Cabletron Systems, Inc.
All other product names mentioned in this manual may be trademarks or registered trade-
marks of their respective companies.
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must ac-
cept any interference received, including interference that may cause undesired operation.
NOTE:This equipment hasbeen tested and found to complywith thelimits for aClass A dig-
ital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide rea-
sonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment uses, generates, and can radiate radio frequency
energy and if not installed in accordance with the operator’s manual, may cause harmful in-
terference to radio communications. Operation ofthis equipment in a residentialarea is likely
to causeinterference in which case the user will be required to correct the interference at his
own expense.
WARNING: Changesor modificationsmade to thisdevice whichare notexpressly approved
by the party responsible for compliance could void the user’s authority to operate the equip-
ment.
Printed on Recycled Paper
Only qualified personnel should perform installation
procedures.

DOC NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from dig-
ital apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des Communications du Canada.
VCCI NOTICE
This is a Class A product based on the standard of the Voluntary Control Council for Interfer-
ence by Information Technology Equipment (VCCI). If this equipment is used in a domestic
environment, radio disturbance may arise. When such trouble occurs, the user may be re-
quired to take corrective actions.
CABLETRON SYSTEMS, INC.
PROGRAM LICENSE AGREEMENT
IMPORTANT: Before utilizing this product, carefully read this License Agreement.
This document is an agreement between you, the end user, and Cabletron Systems, Inc.
(“Cabletron”) that sets forth yourrights and obligations with respect to the Cabletron software
program (the “Program”) contained in this package. The Program may be contained in firm-
ware, chips or other media. BY UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREE-
ING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES
THE LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY.
IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, PROMPTLY RETURN
THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.
CABLETRON SOFTWARE PROGRAM LICENSE
1. LICENSE. You have the right to use only the one (1) copy of the Program provided
in this package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as per-
mitted by the Copyright Act of the United States or as authorized in writing by
Cabletron.
2. OTHER RESTRICTIONS. Youmay not reverse engineer,decompile, ordisassem-
ble the Program.
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed
under the laws and in the state and federal courts of New Hampshire. You accept
the personal jurisdiction and venue of the New Hampshire courts.

EXCLUSION OF WARRANTY
AND DISCLAIMER OF LIABILITY
1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Pro-
gram (including its documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUP-
PLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESSED OR IM-
PLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RE-
SPECT TO THE PROGRAM, THE ACCOMPANYING WRITTEN MATERIALS,
AND ANY ACCOMPANYING HARDWARE.
2. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSO-
EVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSI-
NESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE
DAMAGES, OR OTHER LOSS) ARISING OUT OF THE USE OR INABILITY TO
USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN AD-
VISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES
DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CON-
SEQUENTIAL OR INCIDENTAL DAMAGES, OR ON THE DURATION OR LIMI-
TATION OF IMPLIED WARRANTIES, IN SOME INSTANCES THE ABOVE
LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
The enclosed product (a) was developed solely at private expense; (b) contains “restricted
computer software” submitted with restricted rights in accordance with Section 52227-19 (a)
through (d) of the Commercial Computer Software- Restricted Rights Clause and its succes-
sors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.
For Department of Defense units, the product is licensed with “Restricted Rights” as defined
in the DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1)
(ii) and its successors, and use, duplication, disclosure by the Government is subject to re-
strictions as set forth insubparagraph(c) (1)(ii)ofthe Rightsin TechnicalData and Computer
Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester,
New Hampshire 03867-0505.
SAFETY INFORMATION
LASER RADIATION AND CONNECTORS
When the connector is in place, all laser radiation remains within the fiber. The maximum
amount of radiant power exiting the fiber (under normal conditions) is -12.6 dBm or 55 x 10 -
6watts. Removing the optical connector from the transceiver allows laser radiation to emit
directly from the optical port. The maximum radiance from the optical port (under worst case
conditions) is 0.8 W cm -2 or 8 x 10 3 W m 2 sr-1.
Do notuse opticalinstruments to view the laser output. The use of optical instruments to view
laser output increases eye hazard. When viewing the output optical port, power must be re-
moved from the network adapter.

DECLARATION OF CONFORMITY
Application of Council Directive(s): 89/336/EEC
73/23/EEC
Manufacturer’s Name: Cabletron Systems, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European Representative Name: Mr. J. Solari
European Representative Address: Cabletron Systems Limited
Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England
Conformance to Directive(s)/
Product Standards: EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950
Equipment Type/Environment: Networking Equipment, for use in a Com-
mercial or Light Industrial Environment.
We the undersigned, hereby declare, under our sole responsibility, that the equip-
ment packaged with this notice conforms to the above directives.
Manufacturer Legal Representative in Europe
Mr. Ronald Fotino Mr. J. Solari
Full Name Full Name
Principal Compliance Engineer Managing Director - E.M.E.A.
Title Title
Rochester, NH, USA Newbury, Berkshire, England
Location Location

9032947 Table Of Contents i
TABLE OF CONTENTS
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Other Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi
1. PRODUCT OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Spanning Tree Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Frame Buffering and Frame Latency. . . . . . . . . . . . . . . . . . . . . . . .6
Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Non-volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Configuration and Management Interfaces . . . . . . . . . . . . . . . . . . .7
RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Port Mirroring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Broadcast Throttling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Full Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Client/Server Network Application. . . . . . . . . . . . . . . . . . . . . . . . .11
Local Backbone Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . .14
Mounting the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . .17
Powering the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Power-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

ii Table Of Contents ELS100-24TXG
Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1000Base-X Gigabit Ethernet Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3. ELS100-24TXG USER INTERFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
User Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Factory Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Menu Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
System Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SNMP Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Switch Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Forwarding Table Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . 31
Spanning Tree Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Spanning Tree Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . 35
Spanning Tree Port #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . 36
VLAN Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
VLAN Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
VLAN #n Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
VLAN Port Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Class of Service Configuration Menu. . . . . . . . . . . . . . . . . . . . . . . . . . 41
Port Priority Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Port Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Switch Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Switch Summary Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Port Statistics Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
General Information Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Download Software Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Save Current Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Return to Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4. CONFIGURING & MONITORING THE SWITCH . . . . . . . . . . . . . . . . . . . . . 53
Common Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Setting Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Assigning an IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Checking Network Configuration Status. . . . . . . . . . . . . . . . . . . . . . . . 55
Connecting via Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Setting SNMP Management Access . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Viewing Switch Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Configuring Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Downloading a Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Downloading Via the Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Downloading Via TFTP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

9032947 Table Of Contents iii
Configuring Spanning Tree Parameters . . . . . . . . . . . . . . . . . . . . . . . .58
Configuring VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Configuring Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Configuring Port Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Configuring the Forwarding Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Configuring Broadcast Cutoff Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Setting a Default Gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Configuring BootP/DHCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
5. SNMP MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
The SNMP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
MIB Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
RFC 1213 (MIB-II) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
RFC 1398 (Ethernet MIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
RFC 1493 (Bridge MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
RFC 1757 (RMON MIB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Cabletron Proprietary MIB Extensions. . . . . . . . . . . . . . . . . . . . . .67
Compiling MIB Extensions: Cabletron Website. . . . . . . . . . . . . . . . . . .70
APPENDIX A. TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . .71
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Data Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Environmental Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . .73
MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . 74
Power Cord Set Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Country-Specific Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . .75
APPENDIX B. SPANNING TREE CONCEPTS. . . . . . . . . . . . . . . . . . . . . . . . .77
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Spanning Tree Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Spanning Tree Protocol in a Network. . . . . . . . . . . . . . . . . . . . . . . . . .78
Spanning Tree Protocol Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . .78
Spanning Tree Protocol Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Communicating Between Bridges . . . . . . . . . . . . . . . . . . . . . . . . .80
Selecting a Root Bridge and Designated Bridges . . . . . . . . . . . . .80
Selecting Designated Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Handling Duplicate Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Remapping Network Topology . . . . . . . . . . . . . . . . . . . . . . . . . . .80

iv Table Of Contents ELS100-24TXG
APPENDIX C. FLOW CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
APPENDIX D. VIRTUAL LANS (VLANS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
VLANs and Frame Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
ELS100-24TXG VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . 84
VLAN ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Ports in VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
VLAN Egress Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
VLAN Access Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
VLAN Hybrid Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
VLAN Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
APPENDIX E. CLASS OF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
APPENDIX F. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . 91
INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93