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 d etermine whether any such chan ges have b een 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.
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:
digital 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 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 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:
approved by the 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
Changes or modifications made to this device which are not expressly
VCCI Notice
This is a Class A product based on the standard of the Voluntary Control Council f or
Interference by Information Technology Equipment (VCC I). If this eq ui pmen t is used in
a domestic environment, radio dis turban ce may arise. When s uch troub le occur s, the us er
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.
Notice
Declarati on of Co nformity
Addendum
iii
Application of Council Directive(s):
Manufacturer’s Name:
Manufacturer’s Address:
European Representati v e Name :
European Representative Address:
Conformance to Directive(s)/Product Standards:
Equipment Type/Environment:
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.
We the undersigned, hereby declare, under our sole responsibility, that the equipment
packaged with this notice conforms to the above directives.
SmartStack STS-8SU & STS-SM Installation and User Guide
1.Overview and Specifications
This chapter provides an overview of the SmartStack STS-8SU External Stacker
Unit and related Cabletron equipment. You will also find a list of specifications for
the STS-8SU External Stacker Unit.
Overview
To take full advantage of the network switching architecture, the switched network
must be scalable. In a scalable network y ou can increase the number of switch po rts
on demand. Moreover, each switch must be extendable through the backplane in
order to maintain the high aggregate bandwidth between all switch ports. Switches
meeting these demands are
The stackable network equipment in the Cabletron product family provides the
basis for flexible and scalable network solutions. The Cabletron products include
equipment for stacking two to eight switch es, as well as a wide range of ex pansion
modules that provi de ext ra p orts or at tachment s to existing networ king equi p ment .
stackable
switches.
1
This guide describes how to install and use the STS-8SU External Stacker Unit, a
dedicated switch stacker unit that allows you to connect up to eight switches. Also
described is the SmartStack STS-SM Switch Matrix , that can be install ed in the
STS-8SU Stacker to providing increased network reliability.
Figure 1. Front View of the SmartStack STS-8SU Stacker
SmartStack STS-8SU & STS-SM Installation and User GuideOverview and Specif ic ations
2
Smar tStack STS-SM Switch Matrix
The standard configuration of the STS-8SU External Stacker Unit consists of the
STS-8SU chassis itself and one SmartStack STS-SM switch matrix.
The SmartStack STS-SM Switch Matrix includes a fan, power supply, control
LEDs, and complete logic circuitry. The SmartStack STS-8SU Stacker needs only
one SmartStack STS-SM to operate, but has another slot available for a s econd unit.
If two units are used, the SmartStack STS-8SU Stacker runs with an online
(primary) unit installed in the left slot and an offline (secondary) unit in stalled in
the right slot. If the primary unit should fail, operation is switched to the secondary
unit by automatic logic control. The units can be also be switched manually using
the ACTIVATE push button on the front panel.
SmartStack STS-8SU & STS-SM Installation and User GuideOverview and Specifications
Features and Specifications
This section lists the features and specifications for th e STS-8SU External Stacker
Unit.
Features
The SmartStack STS-8SU Stacker has the following features:
Eight I/O stack ports using 50-pin SCSI-2 type connectors (one per port)
•
280 Mbps per port (full-duplex)
•
1.12 Gbps total capacity
•
The ability to route packets between switches
•
Round-robin output port arbitration
•
Each port operates independently and in parallel (except for multicast)
•
3
Replicates multicast packets
•
No processor. Managed by the attached CrossFire 8600 Series Switches or
•
CrossFire 8730 Switches.
Optional redundant hot-swappable units
•
Front access to field-replaceable units
•
SmartStack STS-8SU & STS-SM Installation and User GuideOverview and Specif ic ations
4
Specifications
See the following table for the SmartStack STS-8SU Stacker specification.
SpecificationValue
Rack mount19 in. rack mount (hardware included) 2 U
DimensionsWidth: 43 cm (17”)
Rack mounted width: 48.4 cm (19”)
Depth: 40 cm (15.74”)
Height: 8.76 cm (3.45”)
Power100 to 240 VAC autosensing.
Frequency50 to 60 Hz
AC current rating1.3 A @ 100 VAC; 0.6 A @ 240 VAC
Operating Temperature
Table 1. SmartStack STS-8SU Stacker Unit Specifications
SmartStack STS-8SU & STS-SM Installation and User GuideOverview and Specifications
❏
2.Switch Stacker Theory of Operation
This chapter explains how SmartStack Switch Stacker equipment improves
network performance.
Switch Stacker: A Unique Concept
Any of the Token Ring switches can be stacked together. The switches in the stack
combine to form a single unit. You can stack two to eight switches and manage
them as a single entity. All of the switches in th e stack must, however, run the same
switch software version.
There are two ways of config uring the switch—as a single stand-alone unit or as a
logical combination of up to eight units. This logical combination of units is called
a
switch stack
.
5
A switch stack can be created in three di fferent ways. The simplest configu ration is
a back-to-back stack, in which two switches are connected directly using the
SmartStack STS-LM Link Module and a stacker link cable.
You can also connect up to five switches by using the SmartStack STS-5SU
Internal Stacker Module. You install this module in one of the switches in the stack,
and then you connect the other switches to it using the SmartStack STS-LM Link
Module and cables.
A stack can also consist of up to eigh t switches, con nected by the SmartStack STS8SU Stacker Unit. In this case, you connect each switch in the stack to the switch
stacker using SmartStack STS-LM Link Module and cables.
When a switch is turned on, it runs a set of self-test diagnostics. After the
diagnostics, the sw itch runs a
sense if the switch is cabled to other switches or to the Sm art Stack ST S- 8S U
Stacker Unit. If the switch discovers other switches, a stack is formed
automatically. If no other switches are detected during the stack discovery mode,
the switch starts operating as a stand-alone unit.
You will not need any special tools, extra software, or expensive equipment to form
a stack of switches. See Chapter 4, “Installation” fo r d etails on how to co nnect the
stack equipment.
stack discovery mode
. The discovery mode is used to
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
6
Stack Features
Single image management for the entire stack (less devices to manage)
•
Management applications represent the stack as a single device
•
— Simple GUI management
Single SNMP image for the entire stack
•
— Eas ier to customize SNMP applications
Distributed intelligence between the units of the stack
•
— Shared learning
— Shared management information
Hot-swappi ng of stack units
•
— If a unit should fail, the other units continue operating as a stack.
— Switches form or reform into the stack.
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
Creating a Switch Stack
You can create a stack of up to eight switches using the SmartStack STS-8SU
Stacker Unit. The following sections describe how this stack is formed.
SmartStack STS-8SU Stacker Unit Description
The STS-8SU Stacker unit is an eight -port switch matrix interface, that can con nect
up to eight SmartStack Token Ring switches. Each SmartStack Token Ring switch
will discover whether it is connected to a switch stacker unit and whether there are
other SmartStack Token Ring switches connected to the switch stacker. The
connected switches and the switch stacker unit will combine logically to form a
stack.
The stacker itself, as well as any of the stacked switches, can be either on or off
when you connect or disconnect a switch in the stack. A proprietary shielded ca ble,
one meter in length, with 50-pin SCSI-2 type connector s is used to connect the
stacker equipment. The cable has
switch stacker or to the SmartStack Token Ring switches. The cable is plugged
directly into a stack port I/O connector on the back of the STS-8SU External
Stacker Unit. The other end is plugged into the SmartStack STS-LM Link Module
interface card that is installed in the expansion slot on the back panel of the switch.
crossover
7
wiring—either end can connect to the
For a description of the features and physical specifications of the STS-8SU
External Stacker Unit, see Chapter 1, “Overview and Specifications”. For details
on the installation of the STS-8SU External Stacker Unit, see Chapter 4,
“Installation”.
Forming a Multi-Unit Switch Stack
When you turn on the switches, they run a set of self-diagnostics. After the
diagnostics, the switches run a stack discovery mode. During this mode, if two or
more switches are co nnected to a SmartStack STS-8SU Stacker Unit, the switches
will sense the connection and combine logically to create a stack configuration.
As soon as stack discovery mode has finished, two things happen:
1. Each switch is assigned a
The box number is determined by the port number on the switch stacker. For
example, the switch that is plugged into port 3 on the SmartStack STS-8SU
Stacker Unit receiv es th e box number 3. The box nu mber remains the same for
the switch as long as it is plugged into the same port. If a switch is connected to
another port, the box number for that switch will change to correspond to the
new port numb er.
box number
.
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
8
2. All of the switches in the stack are set to
The parameters that must share v alues on all of the switches in the s tack are the
inter-box parameters
assigned as the source or
switch is selected as follows:
If all of the switches in the stack have the same configuration information
•
(the switches use only default values or have been configured to use the
same values), the switch that is plugged into the
the stacker is selected as the provider of the inter-box parameters.
If the switches in the stack have different settings for the inter-box
•
parameters, the configuration must be changed so that the settings are the
same on all of the switches. To do this, you have to select which of the
switches in the stack should provide the inter-box parameters for the entire
stack. See “Pro vider of Inter-b ox Parameters” on page 11 for information on
how to do this.
(listed on page 9). One of the boxes in the stack is
provider
of these shared parameters. The provider
some configu ration informat ion.
share
lowest numbered port
on
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
Inter- box Parameters
When a stack is formed, some configuration information of the different switches
in the stack must start using the same settings. These settings are the inter-box
parameters. The stack operates as a single entity when all of the switches in it use
the same inter-box parameters.
The following is a list of the inter-box parameters. These parameters are accessed
from the console configuration menus and screens. The screens and menus are
described in the user documentation supplied with the SmartStack Token Rin g
switches.
9
Switch Configuration
•
— System Name
— System Location
—System Contact
VLAN Parameter Configuration for BRF
•
— VLA N Nam e
— State
—MTU
— Brid ge Nu mber
— 802.1Q VLAN ID
— LAA VLAN MAC Address
VLAN Parameter Configuration for CRF
•
— VLA N Nam e
screen
screen
screen
— Parent VLAN
— State
—Ring Number
—Bridging Mode
— Max ARE Bridge Hop Count
— Ma x STE Bridge Hop Count
— TS Connection
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
10
IP Configuration
•
— IP Address
—Default Gateway
— Subnet Mask
—IP State
SNMP Configuration
•
— All parameters on this screen.
Spanning Tree for BRF
•
— All parameters on this screen.
Spanning Tree for CRF
•
— All parameters on this screen.
Password
•
— All parameters on this menu.
menu
screen
screen
screen
screen
Console Configuration
•
— All parameters on this menu.
Syslog Daemon
•
— All parameters on this screen.
screen
menu
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
11
Provider of Inter-box Parameters
In order for a stack to operate as a single entity, the stack must use a set of inter-box
parameters. If all of the switches in the stack contain the same configuration
information, the s witch t hat ha s the l owest box nu mber (i s pl ugged in to the l owe stnumbered stacker link port on the STS-8SU External Stacker Unit) becomes the
provider of the inter-box parameters. If the parameters are different in any of the
switches trying to form the stack, the provider of inter-box parameters is
determined as described below:
If you connected switches before you turned them of, a message will be
•
displayed on the console screen as the s tack tries to form. At this point, because
there will be different configuration information in at least two of the boxes, a
temporary split-stack (two logical stacks) is formed. The units stay in a splitstack configuration until the warning message is cleared.
The message is as follows:
WARNING: The units trying to form a Stack have different
configurations. Please select a unit as the Stack's
configuration provider by briefly pushing the SysReq (System
Request) button on that unit. (This feature gives you the
option of selecting which unit you want to use as a base for
the Stack parameters).
Once the system request button is pushed on one of the switches, that unit
becomes the stack provider and the other switches will replace their stack
related configuration parameters with the parameters of the provider . Note that
the system request button is unlabeled.
The following applies to a back-to- back stack, co nsisting of two s witches that
•
each has a SmartStack STS-LM Link Module installed:
If you turn on two switches in a back-to-b ack st ack before yo u conn ect them,
they will continue to perform their stand-alone internal switching functions.
While the normal internal switching functions are still operating, a split-stack
will be formed. Once the split-stack is formed, the console displays the
warning message requiring a system request. Pushing the system request
button on one of the switches will give the stack the inter-box parameters of
that switch and allow the stack forming to continue.
If you add switches to an existing stack, the inter-box parameters in the
•
existing stack will be used.
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
❏
12
SmartStack STS-8SU & STS-SM Installation and User GuideSwitch Stacker Theory of Operation
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