Allied Telesis TurboStack AT-S6 User manual

TurboStack ™
AT-S6
Firmware Module
For AT-TS90TR Switch
Operations Manual


Copyright 1996 Allied Telesyn International Corporation
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied
Telesyn International Corporation.
Allied Telesyn International CorporationAllied Telesyn International CorporationAllied Telesyn International
CorporationTrademarks: CentreCOM is a registered trademark of Allied Telesyn International Corporation.
Ethernet is a registered trademark of Xerox Corporation. UNIX is a registered trademark of UNIX System
Laboratories.Novell and NetWare are registered trademarks of Novell, Inc.Microsoft and MS-DOS are registered
trademarks and LAN Manager and Windows for Workgroups are trademarks of Microsoft Corporation. 3Com is a
registered trademark of 3Com. PC-NFS is a trademark of Sun Microsystems, Inc. PC/TCP is a registered
trademark of FTP Software, Inc. DECnet is a registered trademark of Digital Equipment Corporation.

iii
Table of Contents
Chapter 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
TurboStack AT-TS90TR Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Two Modes Of Ethernet Switching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Software Upgrade Installation using an AT-S6 Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Updating Other Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
The RS232 Management Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 3
Setting up Management Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Getting Started — Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Starting a Management Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting an IP Address for Telnet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Using the MAC Address to
Configure Remote Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ending a Local Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Getting Started — Telnet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ending a Telnet Session . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 4
System Administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

iv
Selecting Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
System administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
System name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Password, Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
IP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Ethernet Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Terminal Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Update Software In Another System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Broadcast Updated Software To All Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Activity Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connect to a Remote System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Reset and Restart the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Frame Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Single Counter Graph. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
System Overview Frame Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Individual Port Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Individual Port Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Error Statistics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
System Overview Graph - Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Port Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Select an Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Interface Autosense. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Configuring Port A 100BASE-TX and MII Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Configuring Port B 100 BASE-TX port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Virtual LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Virtual LAN Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Port to VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
MAC Address to VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Bridging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Spanning Tree Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Port to Spanning Tree VLAN Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
MAC Address Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Appendix A
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Appendix B
TurboStack AT-S6 Manual Feedback . . . . . . . . . . . . . . . . . . . . . . . . . 65
Appendix C
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

1
Chapter 1
Overview
Allied Telesyn’s AT-TS90TR is a 10BASE-T switch with 100BASE-TX fast
Ethernet access.You get the benefits of high performance 100BASE-TX
technology while maintaining your investment in existing 10BASE-T
hardware and software.
Allied Telesis’s AT-TS90TR 10BASE-T Switch with fast Ethernet access is
an Ethernet-to-Ethernet smart switch with eight (8) IEEE 802.3 10BASE-
T Ethernet ports for connecting to ethernet hubs, concentrators, devices
with high bandwidth requirements, or other DTEs.
In addition, two (2) 100BASE-TX Ethernet STP/UTP ports are available
for high speed server or backbone connections.PortA,(see Figure 2) which
includes one of the 100BASE-TX ports, is also available as an alternative
100 Mbps, autosensing full duplex, MII Port connection. The MII port lets
you connect a Fast Ethernet tranceiver to the switch letting you use
different types of transmission media, such as fiber optic.
When mounted in a 7 position Allied Telesyn Turbo Stack chassis, the AT-
TS90TR switch is connected to all ATI Hubs, also mounted in the
Turbo Stack chassis, via the Turbo Stack chassis’ segmented backplane.
Your AT-TS90TR also includes an RS232C port for local, out-of-band, or
Telnet management.
The AT-TS90TR switch has the Omega local console management
software factory installed.

Overview
2
Turbo Stack AT-TS90TR Switch
Your AT-TS90TR incorporates:
❑ 100 Mbps of dedicated bandwidth for each of the two 100BASE-TX
ports
❑ MII port is auto-sensing providing either half or full duplex
transmission
❑ 10 Mbps of dedicated bandwidth for each of the eight 10BASE-T
ports
❑ Complete error checking functionality
❑ 48-bit IEEE 802 MAC addressing
❑ Spanning Tree Protocol (802.1d) implementation
❑ MIB II and Bridge MIB compliance
❑ Recessed reset switch
❑ Either standalone, 19-inch rack mount, or Turbo Stack chassis
mounting
❑
Comprehensive diagnostic LED support
❑ 2048 Media Access Control (MAC) address storage
❑ Two modes of switching functionality:
— Cut-through
— Full store-and-forward
❑ Telnet, BOOTP, and TFTP software support
Your AT-TS90TR also offers features that can help you manage and
maintain your network including:
❑ An optional, extra cost, firmware cassette (AT-S6) for upgrading
software and password
❑ Optional, extra cost, AT View network management software
❑ Included either in-band or out-of-band management through a
Telnet virtual terminal connected to the RS232C port
Figure 1: AT-TS90TR Ethernet
SwitchwithFastEthernetAccess

AT-S6 Firmware Module for AT-TS90TR Switch
3
❑ Included is an SNMP agent for configuration and management
using the industry standard Simple Network Management
Protocol (SNMP)
Front Panel The front panel of an AT-TS90TR, shown in Figure 2, has the following
features and connectors.
Handle. The handles on each side of the unit cover the mounting brackets
attached to each side of the AT-TS90TR.
Power Reset Button. The reset Power Reset Button allows you to reboot
the AT-TS90TR from the front panel.
10BASE-T Ports. There are eight switching 10BASE-T ports available on
the front panel.When theAT-TS90TR is mounted in a Turbo Stack chassis,
the left six ports correspond to the six mounting positions in the
Turbo Stack chassis.The right two ports do not have an internal
connection in a Turbo Stack installation; they are used only for connection
to external devices.
Port Activity LEDs. The Port Activity LEDs show link, receive, and
collision status for each of the 10BASE-T ports.
MII Port. Media-Independent Interface port connection provides an
alternative connection to the 100BASE-TX port A. The MII port allows a
user to connect a Fast Ethernet transceiver for access to different media,
such as a fiber optic transmission link.The port is autosensing for full or
half duplex operation.When the MII port is being used, the 100BASE-TX
connection to port A can not be used.
100BASE-TX Ports. The two 100 mbps 100BASE-TX ports can be used
for high-speed connections between a high speed source, such as a
backbone or a server, and the AT-TS90TR switch.
RS232C Network Management Port. The RS232C port is a convenient
out-of-band connection to a local workstation for system management.
Status LEDs. The Fault LED lights when the management software
detects an AT-TS90TR malfunction.The Power LED indicates power is
applied to the unit.
Figure 2: AT-TS90TR Front
Panel
RESET

100 BASE-TX
NETWORK LOAD
10BASE-T NETWORK PORTS (MDI-X) ETHERNET SWITCH 
with FAST ETHERNET
1234 5678
12345678
RS-232
TERMINAL PORT
LINK
RCV
COL

LINK
RCV
COL
MII
POWER
GREEN - RECEIVE

TS90TR
100 BASE-TX
AMBER - COLLISION
TurboStack
FAULT
PORT A PORT B
GREEN - LINK
RS232C Network
Management Port
10BASE-T Port
Power Reset
10BASE-T Ports MII Port
Status LEDs
100BASE-TX
Button
AC Power
Handle Handle
Ports
Activity LEDs
100BASE-TX
Port Activity
LEDs

Overview
4
AC Power. The AC power receptacle (as shown in Figure 2) is located on
the front panel of the AT-TS90TR.The power is on when the AC power
cord is connected.The AT-TS90TR does not have a power on/off switch.
Rear Panel Figure 3 shows the rear panel of the AT-TS90TR.
Cooling Fan .The rear panel has the exhaust for the AT-TS90TR’s
internal cooling fan.
AT-S6 Firmware Cassette .The Firmware Cassette connector is used to
upgrade the AT-TS90TR’s software using a firmware cassette and to
recover from a lost password.The firmware cassette is installed by
removing the cover panel and inserting the firmware cassette into the
opening in the rear panel. Press the cassette firmly into place so it mates
with the AT-TS90TR’s internal connector. Once installed, the software
cassette can secured with the screws used to hold the blank plate.
Segmented Bus Connector. The Segmented Bus connector plugs into
the Turbo Stack chassis Segmented Bus backplane when theAT-TS90TR is
installed in a Turbo Stack.
The Segmented Bus is a seven segment backplane which has been
specifically designed for the AT-TS90TR switch.The Segmented Bus
connects the AT-TS90TR with up to 6 other devices in the seven unit
Turbo Stack chassis.The Segmented Bus acts much like an AUI
connection between the other units and the AT-TS90TR switch.
The Segmented Bus backplane connector in the Turbo Stack chassis is
offset by half an inch from the rest of the backplane connectors keying the
bottom connector to accept only the AT-TS90TR switch in the bottom
position.
If the AT-TS90TR is not installed in a
Turbo Stack chassis, the Segmented
Bus connector is not used.
Two Modes Of
Ethernet Switching
Packets are switched between all eight UTP ports in two popular
operating modes: cut through and store-and-forward.Although your AT-
TS90TR employs store-and-forward as the default, you can also choose
cut-through.
Figure 3: AT-TS90TR Rear
Panel
FIRMWARE CASSETTE
SEGMENTED BUS
Cooling Fan Segmented Bus
Connector AT-S6 Firmware
Cassette
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AT-S6 Firmware Module for AT-TS90TR Switch
5
100BASE-TX. The packets from local Data Terminal Equipment (DTE) to
100 Mbps Fast Ethernet backbone and file server are operated in store-
and-forward manner.The traffic between the two 100BASE-TX ports are
also operated in store-and-forward manner.The 100BASE-TX store-and-
forward operates in the same manner as the 10BASE-T store-and-forward
described below, except data transfer is at 100 mbps instead of 10 mbps.
Cut-through. In a 10BASE-T cut-through system, the device starts to
forward the incoming packet while the packet is still being received on the
inbound link.
Cut-through switching requires software that can both look at the start of
the packet and determine which outbound link is to be used to forward the
packet. Cut-through does not check for Cyclic Redundancy Check (CRC)
errors before forwarding a packet.
10BASE-T Store-and-forward. Store-and-forward means that your AT-
TS90TR stores the incoming packet until it has the entire packet and then
forwards it.
Store-and-forward switching, performed at the MAC layer, not only checks
for a valid CRC before forwarding a packet,but allows your AT-TS90TR to
temporarily store packets until network resources, typically an unused
link, are available for forwarding.This allows complete error checking
until the entire packet is received correctly and limits the amount of time
between when a device requests access to the network and when it is
granted permission to transmit. Full store-and-forward switching,
therefore, ensures data integrity, thus preventing network error
conditions from being generated throughout the network.
On the other hand, in a store-and-forward system, every device in the
path from the sender of the packet to the packet’s receiver adds a small
delay due to the time spent storing the packet before forwarding it.

7
Chapter 2
Installation
Software Upgrade Installation using an AT-S6 Cassette
The Omega firmware is pre-loaded into each AT-TS90TR switch at the
factory and is ready to use.An AT-S6 cassette is available separately for
backup and downloading to AT-TS90TR switches with new releases of the
system software (see Figure 4).
You can use the AT-S6 cassette to change an AT-TS90TR software revision
level one level backward (lower revision level) or any number of revision
levels forward (higher revision levels) and retain all configuration data.
All switches on your network should be running the same version of
software. If, for example, you are installing a new standalone switch into a
network that has older AT-TS90TR switches running an earlier software
version, you should update the other switches to the latest version.
You can use this firmware cassette, similar to a cassette/cartridge used in
laser printers and other devices, to override the login options for password
protection and menu language.The firmware cassette includes network
management agent software for AT-TS90TR switches including:
Figure 4: AT-S6 Cassette
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Installation
8
❑
SNMP Agent supporting MIB II and switch MIB
❑ Management Software with menus in:
English
French
German
Spanish
Italian
Japanese (Kanji—requires use of Kanji async terminal or PC)
❑ Unlimited site license
❑ Software downloading capability (receive and transmit)
❑ Omega Telnet Network Management Software Agent-multilingual
When upgrading management software on a network, first install the
firmware cassette into a switch, upload the software, and then download to
all switches from this first AT-TS90TR switch.
To reinstall or update the management agent
1. Remove the power cord from the switch.
2. If the switch is installed in a Turbo Stack, remove the switch from the
Turbo Stack so you can access the rear of the unit.
Be sure to unplug the switch’s power cord when installing and removing
the firmware cassette.
3. Remove the blank cover plate from the Firmware Cassette slot on the
back panel (see Figure 5). Unscrew the thumbscrews and slide out the
blank plate by grasping the loosened thumbscrews.
4. Slide the firmware cassette into the port; firmly press the connector
housing into place and tighten the thumbscrews. The firmware
cassette backing plate should be flush with the switch panel.
Figure 5: Firmware Cassette
location on rear panel
N
ote
!
C
aution
FIRMWARE CASSETTE
SEGMENTED BUS
Thumbscrews (2)

AT-S6 Firmware Module for AT-TS90TR Switch
9
5. Plug the power cord into the switch. Downloading will proceed, taking
up to two minutes. The switch’s front panel LEDs flash continuously
during downloading. The fault LED flashes once at the end of the
download process.
6. Unplug the switch and remove the software cassette.
You may leave the cassette installed. If you do, however, the module will
not be able to receive downloads over the network. This is so because the
software network download will not overwrite a cassette. Moreover,
password protection is disabled when the cassette is installed.
7. The software installation is complete.
Updating Other
Switches
The Omega software site license permits you to update other AT-TS90TR
Series Switches throughout the network.You don’t need to insert an AT-
S6 cassette in each switch in the network or rack.
The Omega software uses the password assigned to the unit to determine
if the software applies to the unit. The default password assigned to the
AT-TS90TR switch at the factory is ATS90. Thus on a network you can use
a broadcast to update all AT-TS90TR switches. Only devices with the
password ATS90 will be updated. If you have modified a switch’s internal
password, you will have to specify that password for the upgrade to take
effect over the network.
The Omega user interface provides commands to load software into any
other specified AT-TS90TR or to update all AT-TS90TR switches in the
network.To update software, you must have a unit with new software or
insert the new release cassette into one AT-TS90TR: From that switch you
can load the new software into other selectedAT-TS90TR Series Switches.
If you want,you can run the new software on a limited number of switches
as a kind of “dry run.”When you have become familiar with the new
release, you can load it from one of the updated AT-TS90TR switches in
the network.
You can identify an individual switch to be updated by its Ethernet MAC
address, its Internet Protocol (IP) address, or a user-assigned symbolic
name.
We recommend that you assign a switch name during installation and that
all AT-TS90TR switch names be unique at least within a particular
department. If other AT-TS90TR switches in areas outside the network
manager’s control have identical switch names, they may possibly receive
downloads accidentally.
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ote
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Installation
10
AT-TS90TR Series Switches use the TCP/IP-family Trivial File Transfer
Protocol (TFTP) to download other units internally, whether or not your
network is configured with IP parameters. In a non-TCP/IP installation,
the TFTP protocol will be transparent to the other (non-IP) devices on the
network. Using this industry-standard suite of protocols enables the AT-
TS90TR to load software to another unit even if it is geographically
separated, within the following constraints:
❑The network path between the two units must be a direct datalink
Media Access Control (MAC) layer path. The units must be
physicallyconnected to the same network cable or be joinedonly by
datalink layer propagation devices such as switches or bridges.
❑The units may be joined by a network layer device (a router) only if
the device is an IP router and only if each AT-TS90TR has been
configured with an appropriate IP address and subnet mask.
The RS232 Management Port
AT-TS90TR Series Switches have a special management port for
connecting a user-supplied serial device.This port conforms to the
signaling characteristics of EIA standard RS232 and implements the
signals necessary to support an asynchronous device.The physical
connector is not, however, an RS232 DB25, but is instead a DB9 (see
Figure 6) commonly used on PCs.
A 25-pin to 9-pin adapter comes with all manageable AT-TS90TR Series
Repeatermodels.Thisadapterenablesachange fromconnectorswithapin
interface to connectors with a hole interface.
For some applications you will need a conversion cable. One kind of
conversion cable allows the AT-TS90TR Series Switch to perform as Data
Communication Equipment (DCE); a different cable allows the switch to
serve as Data Terminal Equipment (DTE).You may connect the terminal
directly (with the switch as a DCE), or through an asynchronous modem
(using a “null modem cable”) to convert the AT-TS90TR interface to a
DTE. Table 1 shows pin assignments for both cabling methods.
Figure 6: AT-TS90TR RS232
DCE Connections
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ote
5 4 3 2 1
9 8 7 6

AT-S6 Firmware Module for AT-TS90TR Switch
11
Table 1:RS232 Cable
AT-TS90TR Switches support various commonly used data rates (baud
rates), from 75 bps to 19.2 kbps, as well as an automatic baud rate
detection mode.Automatic baud rate detection mode is the default setting
and facilitates switch connections.The interface supports either 7 or 8
data bits; even, odd or no parity; and 1 or 2 stop bits.
The RS232 DCE signals Data Set Ready (DSR) and Clear To Send (CTS)
will be asserted constantly.The DTE signal Data Terminal Ready (DTR)
must be asserted at the switch, and Request To Send (RTS) will be
ignored.These pre-defined signals will provide compatibility with almost
all possible user devices.When using a “null modem” cable to interface to
a modem, DTR and RTS will be asserted constantly, and DSR and CTS
will be ignored.This is compatible with common auto-answer, full duplex
modems.When you “quit” a management agent session, DTR (DSR when
using a DCE) is dropped momentarily to inform the modem to take the
circuit on-hook (“hang up”).
Be sure to “quit” the Omega session when you are finished. If you don’t,
Omega will continue to run on the switch blocking future Telnet sessions.
AT-TS90TR DB9 Signal Name Terminal DTE DB25 Modem DCE DB25
1 N/C — —
2RD3 2
3TD2 3
4 DTR 20 6
5SG7 7
6 DSR 6 20
7RTS 4 5
8 CTS 5 4
9 N/C — —
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13
Chapter 3
Setting up Management Software
Your AT-TS90TR has pre-installed the Omega Console software which
gives access to the AT-TS90TR internal Management Software and
network management agents.The Omega Console software is accessible
either through the RS232 serial port or remotely from a management
station by means of a Telnet session, if the IP address is already
configured.
The purpose of this chapter is to make basic Ethernet communication
connections quickly and easily. Subsequent chapters will build on this
information with detailed procedures for additional management tasks.
If you run into difficulty, an on-line help menu is available from any menu
screen. Simply enter “?” to display the following help screen:
Figure 7: Management
Software Help Screen.

Setting up Management Software
14
If you are running Windows on your PC to access Omega, you can use the
Microsoft®Windows®terminal icon. Simply connect your PC to the RS232
management port on the hub, select the Windows terminal icon and press
<RETURN> twice to initiate a session. The screens in this manual are shown
as generic terminal screens.
Getting Started — Ethernet
Connectivity Attach a Catagory 5, RJ45 UTP cable from your server to either of the
100BASE-TX ports for a high capacity, 100 MHz connection to the AT-
TS90TR switch.This connection may be either full or half-duplex.
You may also use the MII port available on the AT-TS90TR front panel to
connect, through a suitable transceiver, a fiber optic cable or other
medium, to a server with a 100 MHz NIC card with a fiber optic (or MII
and transceiver) connection.The connection via the MII port is full or half-
duplex autosensed and provides an alternate, 100 MHz, high-capacity
connection to the switch.
You may connect a workstation, typically one with high volume data
requirements, or connect shared media hubs directly to each of the eight
10BASE-T ports on the switch’s front panel.
A linked connection to any of the first six RJ45 10BASE-T front panel
connectors will, in the default configuration, automatically disconnect a
device mounted in the TurboStack chassis, in a position corresponding to
the front panel connector from the AT-TS90TR switch. Refer to the section
“Interface Autosense” on page 41 for details on modifying the default
configuration.
Starting a Management Session
The RS232 front panel port on the AT-TS90TR provides a local, out-of-
band connection for local access to the switch’s internal management
program. Connection to the AT-TS90TR switch via the RS232 port does
not affect the performance of the switch on the network but does allow
real-time management of the switch while it is operating.
Management Allied Telesyn’s Omega management software is pre-installed in the AT-
TS90TR switch.You may configure the switch, using Omega, to optimize
its performance as required by your particular network environment as
follows:
1. Connecttheserialportofyourterminal orPCtotheRS232 consoleport
on the front of the AT-3690TR. For a PC connection, use a straight-
through, 9-pin cable.
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ote
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AT-S6 Firmware Module for AT-TS90TR Switch
15
2. Access your terminal or the terminal emulator program in Microsoft
Windows. If you use Windows, ensure that the Terminal Configuration
(found within the System Administration submenu) options are set as
follows:
❑Data bits: 8
❑Stop bits: 1
❑Parity: 0
❑Connector: Com1/Com2 (PC/terminal dependent)
SinceOmegasupportsautobaud,abaudratedoesnotneedtobeconfigured
on the terminal side. These configuration options apply whether you are
using Windows or a DOS-based terminal emulator program. To be sure
terminal configuration settings are always available, we suggest that you
save them as an Omega file (e.g., TS90OMEG.TRM).
3. Press the RETURN key several times. This will ensure autoconfiguration
ofthe appropriatebaudrate.(Ifasessionpasswordpreviouslyhasbeen
set in the System Administration menu, you are prompted to enter it
here.The default configuration does not have a password.)
4. The Main menu of Omega, shown in Figure 8, is displayed. You may
not see all the characters and menu items if you are not using a full
screen.
Setting an IP
Address forTelnet Remote communications with the AT-3690TR requires the use of the
Transmission Control Protocol/Internet Protocol (TCP/IP) suite. In order
to configure your network, you first must provide the AT-3690TR with its
IP address.
N
ote
Figure 8: Management
Software Main Screen.

Setting up Management Software
16
TCP/IP internet addresses consist of user assigned numbers which
identify members of the network.They normally have three fields:
network number, subnet number (optional), and host number. TCP/IP
addresses are expressed in the form of a.b.c.d., where a,b,c and d are each
in the 0-255 range.That is, it adheres to the following notation
255.255.255.255 (192.136.118.3 for example).
Note that you can configure your network through a serial-link Omega
session. Simply set the IP address to a BootP server to download the IP
address information when the AT-3690TR initializes.A full discussion of
the BootP process is presented in Chapter 3.
Using the MAC
Address to
Configure Remote
Devices
Connect to a serial port on a local hub which does not have TCP/IP
installed. Choose Omega’s option ‘Connect to a remote system’
which is a subset within the System Administration menu, and
connect to the remote hub using the MAC address of the remote hub.
MAC addresses on TurboStack units are located on the end of the right
handle. Other ATI devices typically have their MAC addresses located
near the RS-232 connector.
From the Main menu, enter the letters SY to access the System
administration submenu:
Enter the letter Ifor “IP parameters” to access the following
submenu:
Figure 9: SystemAdministration
menu