Cabletron Systems SmartSwitch 6000, SmartTrunk User Manual
SmartTrunk
User’s Guide
9032267-04
Notice
Notice
Cabletron Systems reserves the right to make changes in specifications and other information
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, INDIRECT,
SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED
TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION
CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF, KNOWN, OR
SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
© December 1998 by:
Cabletron Systems, Inc.
P.O. Box 5005
Rochester, NH 03867-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9032267-04
Cabletron Systems
SmartMIM-216
All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.
and
FNB
are registered trademarks and
are trademarks of Cabletron Systems, Inc.
SmartSwitch, SmartTrunk
, and
i
Notice
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 accept any
interference received, including interference that may cause undesired operation.
NOTE:
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial envir onment.
This equipment uses, generates, and can radiate radio frequency energy and if not installed in
accordance with the operator’s manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause interference in which case the user
will be required to correct the interference at his own expense.
WARNING:
party responsible for compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital
Changes or modifications made to this device which are not expressly approved by the
VCCI Notice
This is a Class A product based on the standard of the Voluntary Control Council for Interference 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 required to take corrective
actions.
Industry Canada Notice
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
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.
ii
Notice
Declaration of Conformity
Addendum
Application of Council Directive(s):
Manufacturer’s Name:
Manufacturer’s Address:
European Representative Name:
European Representative Address:
Conformance to Directive(s)/Product Standards:
Equipment Type/Environment:
We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged with
this notice conforms to the above directives.
89/336/EEC
73/23/EEC
Cabletron Systems, Inc.
35 Industrial Way
PO Box 5005
Rochester, NH 03867
Mr. J. Solari
Cabletron Systems Limited
Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG13 2PZ, England
EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950
Networking Equipment, for use in a
Commercial or Light
Industrial Environment.
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
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Notice
iv
Chapter 1 Introduction
SmartTrunking............................................................................................................... 1-1
Packet Distribution .......................................................................................................1-2
Compatibility - DEC Hunt Groups and
Chassis with Multiple SmartTrunking Groups.........................................................1-3
SmartTrunk and Port Connections.............................................................................1-4
Getting Help .................................................................................................................. 1-7
Contents
SmartSwitch Router (SSR)....................................................................................1-3
Chapter 2 SmartTrunk Configuration
SmartTrunk Configuration Rules................................................................................2-1
SmartTrunking Configuration Screen........................................................................ 2-3
Exiting the SmartTrunking Configuration Screen............................................. 2-6
Appendix A Helpful Hints for Configuring SmartTrunk
Creating a Second Trunk Group ................................................................................ A-2
Removing an Entire Trunk Group.............................................................................A-3
Removing a Port from a Group..................................................................................A-3
Appendix B MIBII Logical Interface Behavior
Logical/Virtual Port.....................................................................................................B-1
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Contents
vi
Introduction
Traditional 802.1D Spanning Tree Bridges only allow one active data path
between any two switches; all other parallel data paths are in Standby or Blocking
mode. If one interface or path should fail, then the other interface automatically
comes out of Blocking mode and forwards all of the traffic. This is fine for
redundancy purposes. However, it is not the most efficient use of resources.
Chapter 1
SmartTrunk, also referred to as SmartTrunking, is Cabletron Systems’
terminology for load balancing or load sharing. SmartTrunk provides the ability
to take full advantage of the network’s redundant bandwidth. SmartTrunk
divides network traffic across multiple ports in parallel to provide additional
throughput. The SmartTrunk application can be used with any of Cabletron
Systems’ switch modules (except ATM modules).
SmartTrunking
A physical port configured in a SmartTrunk Group must:
• Be connected in a point-to-point link (full-duplex is recommended)
• Be connected to a port that is also configured as part of a SmartTrunk Group
• Have Spanning Tree protocol enabled
Whenever a physical port is configured in a SmartTrunk Group, the port will send
proprietary protocol messages (see PLAP and LLAP information in the
Compatibility section). Once the two switches at opposite ends of the link agree
that the trunking state is enabled, the SmartTrunk Group is established. As
additional ports are identified as belonging to the same SmartTrunk Group, the
SmartTrunk Group is automatically reconfigured to take advantage of the
additional paths.
1-1
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