Cabletron Systems MMAC-Plus 9T125-24 User manual

9032053-01
SmartSwitch 9000 9T125-24
User’s Guide

i
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.
© Copyright April 1998 by:
Cabletron Systems, Inc.
35 Industrial Way
Rochester, NH 03867-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9032053-01
LANVIEW is a registered trademark, and SmartSwitch is a trademark of Cabletron Systems, Inc.
CompuServe is a registered trademark of CompuServe, Inc.
i960 microprocessor is a registered trademark of Intel Corp.
Ethernet is a trademark of Xerox Corporation.

Notice
ii
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: This equipment has been tested and found to comply with the limits for a Class A 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: Changes or modifications made to this device which are not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment.
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.
DOC 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 Aprescrites dans le Règlement sur le brouillage radioélectrique
édicté par le ministère des Communications du Canada.

iii
Notice
DECLARATION OF CONFORMITY
ADDENDUM
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
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.
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

Notice
iv

v
Chapter 1 Introduction
Features...........................................................................................................................1-1
Related Manuals............................................................................................................1-4
Getting Help .................................................................................................................. 1-4
Chapter 2 Installation
Unpacking the Module.................................................................................................2-1
User Accessible Components......................................................................................2-2
Setting the Module Card DIP Switch.........................................................................2-3
Ring Speed .....................................................................................................................2-4
Installing the MicroLAN Module...............................................................................2-4
The Reset Switch ........................................................................................................... 2-6
Chapter 3 Operation
Bridging..........................................................................................................................3-1
Transparent Bridging.............................................................................................3-2
Source Route Bridging .......................................................................................... 3-2
Spanning Tree Algorithm......................................................................................3-3
Flexible Network Bus (FNB)........................................................................................3-3
System Management Buses .........................................................................................3-4
SMB-1 Bus...............................................................................................................3-4
SMB-10 Bus.............................................................................................................3-4
System Diagnostic Controller...................................................................................... 3-4
DC/DC Converter ........................................................................................................3-5
FNB Interface.................................................................................................................3-5
i960 Core......................................................................................................................... 3-5
Chapter 4 LANVIEW LEDs
Chapter 5 Specifications
Safety...............................................................................................................................5-1
Service............................................................................................................................. 5-1
Physical...........................................................................................................................5-2
Dimensions............................................................................................................. 5-2
Weight......................................................................................................................5-2
Electrical.........................................................................................................................5-2
Contents

Contents
vi

1-1
Chapter 1
Introduction
The 9T125-24 Module MicroLAN™ Switch Module, shown in Figure , is a
three-port Token Ring switch module. This module supports two separate front
panel Token Rings with twelve HUB connections, and an interface to the FNB
backplane.
Features
Processor
The 9T125-24 Module is equipped with an advanced Intel i960 microprocessor.
This microprocessor provides a platform for all management functions within a
scalable RISC-based architecture.
System Management
Interfaces to the two System Management Buses (SMB-1 and SMB-10) for
intermodule management.
Connectivity
The 9T125-24 provides twenty four RJ45 Trunk Coupling Unit (TCU) lobe
connectors.
SRT Packet Switching
SRT Bridging occurs between the front panel Token Ring connections and SR-TB
bridging to any other module in the chassis via FNB -1 or FNB -2 of the FNB bus.
The module is capable of Transparent Bridging and/or Source Route Bridging.
IEEE 802.1d Spanning Tree Protocol is supported in all bridging functions.
Translational bridging between Source Routing and Transparent Frames types is
also performed for packets destined for the FNB.

Introduction
1-2
Figure 1-1. The 9T125-24 Module MicroLAN Module
12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
16 Mb
SMB CPU
FNB
9T125-24
TOKEN RING

1-3
Introduction
Management Information Base (MIB) Support
The 9T125-24 Module provides MIB support including:
• IETF MIB II (RFC 1213)
• IETF RMON MIB (RFC 1271 and 1513)
• IETF Bridge MIBs (RFC 1493 and 1525)
• IEEE 802.5 Token Ring MIB (RFC 1231)
• Cabletron Enterprise MIBs
Ring Security
This feature prevents unauthorized stations from attaching to the ring. Using
Local or Remote Management, the module may be configured as to which MAC
addresses are allowed to operate on the ring.
LANVIEW LEDs
The 9T125-24 Module uses LANVIEW – the Cabletron Systems built-in visual
diagnostic and status monitoring system. With LANVIEW LEDs, you can quickly
identify the device, port, and physical layer status at a glance.
Hot Swapping
The 9T125-24 Module can be installed or removed from the chassis while the
SmartSwitch 9000 is powered up without affecting the operation of the remaining
modules in the chassis.
Webview
Management of the 9T125-24 Module may be accomplished using Cabletron’s
WEBVIEW. This allows managing the module though an on-line browser.
For a complete list of supported MIBs, refer to the release notes provided in
the module package.
NOTE

Introduction
1-4
Related Manuals
The manuals listed below should be used to supplement the procedures and
technical data contained in this manual.
SmartSwitch 9000 Installation Guide
SmartSwitch 9000 Operations Guide
SmartSwitch 9000 9C300-1 Environmental Module User’s Guide
SmartSwitch 9000 9C214-1 AC Power Supply User’s Guide
SmartSwitch 9000 Local Management User’s Guide
Getting Help
For additional support related to this device or document, contact the Cabletron Systems Global Call
Center:
Before calling the Cabletron Systems Global Call Center, have the following information ready:
• Your Cabletron Systems service contract number
• A description of the failure
• A description of any action(s) already taken to resolve the problem (e.g., changing mode switches,
rebooting the unit, etc.)
• The serial and revision numbers of all involved Cabletron Systems products in the network
• A description of your network environment (layout, cable type, etc.)
• Network load and frame size at the time of trouble (if known)
• The device history (i.e., have you returned the device before, is this a recurring problem, etc.)
• Any previous Return Material Authorization (RMA) numbers
Phone [phone]
Internet mail suppor[email protected]
FTP ctron.com (134.141.197.25)
Login anonymous
Password your email address
BBS [phone]
Modem setting 8N1: 8 data bits, No parity, 1 stop bit
For additional information about Cabletron Systems or its products, visit the
World Wide Web site: http://www.cabletron.com/
For technical support, select Service and Support .
To send comments or suggestions concerning this document, contact the
Cabletron SystemsTechnical Writing Department via the following
email address: [email protected]
Make sure to include the document Part Number in the email message.

2-1
Chapter 2
Installation
To install the 9T125-24 Module into the SmartSwitch 9000 chassis, follow the
procedures detailed in this chapter.
Unpacking the Module
1. Carefully remove the module from the shipping box. (Save the box and
packing materials in the event the module must be reshipped.)
2. Remove the module from the plastic bag. Observe all precautions to prevent
damage from Electrostatic Discharge (ESD).
3. Carefully examine the module, checking for damage. If any damage exists,
DO NOT install the module. Contact Cabletron Systems Technical Support
immediately.

Installation
2-2
User Accessible Components
Figure 2-1 shows the various components that are accessible to the user. These
consist of an eight position dip switch (explained in the next section), replaceable
PROMs and sockets for RAM. These will be used for future upgrades.
Figure 2-1. User Accessible Components
SMB-1 PROM
i960 Processor
Flash SIMM
8-Position
DIP Switch
Boot PROM
Local DRAM SIMM
Management
Packet SIMM
1 2 3 4 5 6 7 8

2-3
Installation
Setting the Module Card DIP Switch
An eight position DIP switch is located on the module card as shown in Figure 2-1
and in Figure 2-1. The functions of this switch are listed in Table 2-1.
See the
Cautions at the end of this table.
Table 2-1. Function of DIP Switch
Switch Function Description
8 Clear
Password
1
When toggled, this switch clears user-entered
passwords stored in NVRAM, and restores the
default passwords. Once reset you can use the
defaults or enter new passwords.
7 Clear
NVRAM
2
The module uses NVRAM to store user
entered parameters such as IP addresses,
device name, etc. To reset these parameters to
the factory defaults, toggle this switch. Once
reset, you can use the defaults or enter new
parameters which are stored in NVRAM when
the module is powered down, and remain
there until the switch is toggled again.
6 Force BootP
Download Toggling this switch after pulling the board out of the SmartSwitch 9000 , clears download
information from NVRAM and forces image
files to be downloaded from the station
configured to act as that modules’ BOOTP
server.
5 Reserved For Factory Use Only
4 Reserved For Factory Use Only
3 Reserved For Factory Use Only
2 Reserved For Factory Use Only
1 Reserved For Factory Use Only
1Do not toggle Switch 8 unless you intend to reset the user configured passwords
to their factory default settings.
2Do not toggle Switch 7 unless you intend to reset the user parameters to the
factory default settings.
!
CAUTION

Installation
2-4
Ring Speed
The module defaults to a 16Mbps ring speed on all rings. This may be changed
though local management.
Installing the MicroLAN Module
The SmartSwitch 9000 MicroLAN Module may be installed into any of the 14 slots
that are available. To install, follow the steps below:
1. Switch off the power supplies and remove all power from the SmartSwitch
9000 chassis.
2. Remove the blank panels, covering the slots that the module is being mounted
in. All other slots must be covered, if modules are not being installed, to
ensure proper airflow and cooling.
3. Carefully remove the module from the shipping box. (Save the box and
packing materials in the event the module must be reshipped.)
4. Attach one end of the ESD wrist strap packaged with the SmartSwitch 9000
chassis to your wrist. Plug the other end into the ESD Wrist Strap Grounding
receptacle in the lower right corner of the SmartSwitch 9000 Chassis as shown
in Figure 2-2.
5. Remove the module from the plastic bag. Observe all precautions to prevent
damage from Electrostatic Discharge (ESD).
6. Carefully examine the module, checking for damage. If any damage exists,
DO NOT install the module. Contact Cabletron Systems Technical Support
immediately.
7. The modules are installed into the chassis by sliding them into slots and
locking down both the top and bottom plastic tabs, as shown in Figure 2-2.
Take care that the module slides in straight and engages the backplane
connectors properly. Ensure that both circuit cards are between the card
guides. Check both the upper and lower tracks of both cards.

2-5
Installation
Figure 2-2. Installing the MicroLAN Module
Metal Back-Panel
Module Guides
Module
Jack for ESD
Wrist Strap
Plastic Tab
Warning:
Ensure that the circuit card is between the card guides.
Lock down the top and bottom plastic tabs
at the same time, applying even pressure.

Installation
2-6
The Reset Switch
The Reset switch is located on the front panel, under the top plastic tab as shown
in Figure 2-3. It serves two functions:
• Pressing the reset switch twice within three seconds causes the processor (i960)
to reset.
• Pressing and holding the switch on for three or more seconds causes the
module to shutdown. Pressing and holding the switch again for three seconds
restarts the module.
SNMP management may be used to disable this switch to enhance module
security.
Figure 2-3. The Reset Switch
SMB CPU
Reset Switch

3-1
Chapter 3
Operation
The 9T125-24 MicroLAN Module provides connectivity between the front panel
Token Ring(s) and the FDDI rings on the backplane (FNB-1 or FNB-2).
SmartSwitch 9000 modules connect to either the Internal Network Bus (INB) or
the Flexible Network Bus (FNB) bus. The 9T125-24 module connects to the FNB
bus. Shown in Figure 3-1 is a block diagram of the module. The two rings function
as individual networks, each with twelve ports. Switching may occur between
these two rings and/or to any other SmartSwitch 9000 module via the Flexible
Network Bus.
Figure 3-1. 9T125-24 Block Diagram
Bridging
The 9T125-24 is configured for SRT bridging. It will pass SR (Source Routing)
frames between the rings and provides translation to transparent frames over the
FNB to Ethernet and FDDI modules. For information on configuring the bridging
function, see the addendum to the SmartSwitch 9000 Local Management User’s
Guide, containing information specific to this model.
i960 PLUS Core FNB-1 or
FNB-2
System
Diagnostic
Controller SMB-10
SMB-1
DC/DC
Converter
Twelve
Front Panel
Connections
Twelve
Front Panel
Connections

Operation
3-2
Transparent Bridging
Transparent Bridging is provided between all three interfaces and is
accomplished by building a Source Address Table (SAT) from source
MAC/physical addresses and using the SAT to make forwarding decisions.
The 9T125-24 prevents unnecessary network traffic from passing through the
module by implementing two separate filtering processes — IEEE 802.1d or
Cabletron’s Special Filtering Database. These processes may be used individually
or in tandem.
The first process, the IEEE 802.1D filtering process, begins with the creation of a
list of local node addresses in a table (the SAT). When the 9T125-24 first goes on-
line, it initially forwards all packets across the bridge. After receiving a packet on
the bridge port, the 9T125-24 learns the address of the sending node from the
packet and stores that address in the SAT. In this manner, the bridge learns the
address of each node on each side of the bridge. The bridge then uses the
addresses stored in the table to compare the destination address of each
subsequent packet that travels to the bridge. If the destination address of a packet
resides on the bridge segment, the 9T125-24 does not forward across the Token
Ring link.
The second filtering process, the Cabletron Systems Special Filtering Database,
provides an additional step in the filter/forward decision. Through Remote
Management, you can define up to 10 additional filtering parameters for
incoming network traffic. These parameters include (but are not limited to) the:
• destination address
• source address
• type field (protocol)
• 64 bytes of the data field (using a data offset)
For example, using this process, you can ensure that the 9T125-24 always filters or
forwards packets with a specific protocol or address.
Source Route Bridging
Source Route Bridging is provided between the front panel Token Ring and the
FNB backplane. It operates by transmitting frames over a designated route.
Unlike Transparent Bridging, all devices in a Source Route Bridged (SRB) network
“know” the locations of other stations within the network. Using a portion of the
MAC frame header known as the RIF (Routing Information Field), the source
device determines the route for the frames it sends.