Cabletron Systems TRMM User manual

TRMM/TRMMIM LOCAL MANAGEMENT

USER’S GUIDE

i

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.

Cabletron Systems Inc., P.O. Box 5005, Rochester, NH 03866-5005

Printed in the United States of America

Order Number: 9030293-02 March 1996

Token Ring/LM

,

ETWMIM

,

SNACMIN-12

,

TRMM

,

TRMMIM

,

TRBMIM

,

TRMIM-12

,

TRMIM-10R

,

TRMIM-22

,

TRMIM-20R

,

TRMIM-22A

,

TRMIM-24A

,

TRRMIM-A

,

TRRMIM-2A

,

TRRMIM-4A

,

TRMIM-42A

,

TRMIM-44A, LANVIEW, Remote

LANVIEW/Windows, SPECTRUM,

and

MMAC

are trademarks of

Cabletron Systems Inc.

IBM

is a registered trademark of International Business Machines

Corporation.

VT200

and

VT300

are trademarks of Digital Equipment Corporation.

CompuServe

is a trademark of Compuserve, Inc.

Printed on recycled paper

NOTICE

ii

CABLETRON SOFTWARE PROGRAM LICENSE

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

permitted by the Copyright Act of the United States or as authorized in writing

by Cabletron.

OTHER RESTRICTIONS.

You may not reverse engineer, decompile, or

disassemble the Program.

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 Program (including Its documentation and media).

CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE

SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESS

OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED

WARRANTIES OF MERCHANTABLITY AND FITNESS FOR A

PARTICULAR PURPOSE, WITH RESPECT 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 WHATSOEVER (INCLUDING, WITHOUT

LIMITATION, DAMAGES FOR LOSS OF BUSINESS, 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 ADVISED OF THE POSSIBILITY OF SUCH

DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE

EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL

OR INCIDENTAL DAMAGES, OR ON THE DURATION OR

NOTICE

iii

LIMITATION OF IMPLIED WARRANTEES 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 successors, 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 restrictions as set forth

in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer

Software clause at 252.227-7013. Cabletron Systems, Inc., 35 Industrial Way.

Rochester, New Hampshire 03866.

v

CONTENTS

CHAPTER 1 INTRODUCTION

1.1 USING THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2 GETTING HELP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.3 TOKEN RING MANAGEMENT MODULES. . . . . . . . . . . .1-2

1.4 RELATED MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

1.5 RECOMMENDED READING. . . . . . . . . . . . . . . . . . . . . . .1-4

CHAPTER 2 ACCESSING LOCAL MANAGEMENT

2.1 MANAGEMENT TERMINAL CONFIGURATION. . . . . . . .2-1

2.1.1 VT200 or VT300 Series Terminal Setup . . . . . . . .2-2

2.2 CONFIGURING THE TERMINAL CABLE. . . . . . . . . . . . .2-3

2.2.1 Pinout Configurations. . . . . . . . . . . . . . . . . . . . . . .2-3

2.2.2 Connecting the Console Cable to a Terminal . . . .2-4

2.3 ACCESSING LOCAL MANAGEMENT . . . . . . . . . . . . . . .2-4

2.3.1 LM Access Restrictions . . . . . . . . . . . . . . . . . . . . .2-6

CHAPTER 3 USING LOCAL MANAGEMENT

3.1 WORKING WITH LM SCREEN FIELDS . . . . . . . . . . . . . .3-1

3.2 THE MAIN MENU SCREEN . . . . . . . . . . . . . . . . . . . . . . .3-2

CHAPTER 4 THE DEVICE SETUP MENU

4.1 THE SYSTEM LEVEL SCREEN . . . . . . . . . . . . . . . . . . . .4-2

4.1.1 System Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

4.1.2 System Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

4.1.3 IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

4.1.4 Subnet Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

4.1.5 Enable Beacon Recovery. . . . . . . . . . . . . . . . . . . .4-6

4.1.6 Number of Retries . . . . . . . . . . . . . . . . . . . . . . . . .4-7

4.1.7 Retry Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

4.1.8 FNB MAC Address. . . . . . . . . . . . . . . . . . . . . . . . .4-8

4.2 THE SNMP COMMUNITY NAMES SCREEN . . . . . . . . . .4-9

CONTENTS

vi

4.2.1 SNMP COMMUNITY NAMES Screen Fields. . . .4-10

4.2.2 Editing the Community Name Field . . . . . . . . . . .4-11

4.2.3 Exiting the SNMP Community Names Screen. . .4-12

4.3 THE SNMP TRAPS SCREEN. . . . . . . . . . . . . . . . . . . . .4-12

4.3.1 SNMP TRAPS Screen Fields. . . . . . . . . . . . . . . .4-13

4.3.2 Setting SNMP Traps . . . . . . . . . . . . . . . . . . . . . .4-13

4.3.3 Exiting the SNMP TRAPS Screen . . . . . . . . . . . .4-14

4.4 THE RING SECURITY SCREEN . . . . . . . . . . . . . . . . . .4-14

4.4.1 Ring Security Screen Definitions . . . . . . . . . . . . .4-15

4.4.2 Working with the RING SECURITY Screen. . . . .4-17

4.5 THE BOOT GATEWAY SCREEN . . . . . . . . . . . . . . . . . .4-19

CHAPTER 5 THE DEVICE STATUS MENU

5.1 THE CHASSIS STATUS VIEW SCREEN . . . . . . . . . . . . .5-2

5.1.1 Selecting a Chassis Status View Mode . . . . . . . . .5-2

5.1.2 Describing Static Screen Fields. . . . . . . . . . . . . . .5-4

5.1.3 Setting the FNB/BYPASS MUX Configuration. . . .5-6

5.1.4 Setting Port Status Fields . . . . . . . . . . . . . . . . . . .5-7

5.1.5 Enabling All Ports. . . . . . . . . . . . . . . . . . . . . . . . . .5-9

5.1.6 Setting a Module’s Operational Mode . . . . . . . . . .5-9

5.1.7 Controlling the Screen View. . . . . . . . . . . . . . . . .5-10

5.1.8 Setting the Screen Refresh Interval. . . . . . . . . . .5-11

5.2 THE COMPONENT STATUS VIEW SCREEN . . . . . . . .5-11

CHAPTER 6 THE DEVICE STATISTICS SCREEN

6.1 DESCRIBING DEVICE STATISTICS FIELDS. . . . . . . . . .6-1

6.1.1 Interface Field . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

6.1.2 Counter Mode Field . . . . . . . . . . . . . . . . . . . . . . . .6-2

6.1.3 Total Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2

6.1.4 Ring Information Fields . . . . . . . . . . . . . . . . . . . . .6-3

6.1.5 Isolating Errors Fields . . . . . . . . . . . . . . . . . . . . . .6-4

6.1.6 Non-Isolating Errors Fields . . . . . . . . . . . . . . . . . .6-6

6.2 SELECTING A COUNTER MODE . . . . . . . . . . . . . . . . . .6-8

6.2.1 Using the ACCUMULATIVE Mode. . . . . . . . . . . . .6-8

CONTENTS

vii

CHAPTER 7 THE SNMP TOOLS SCREEN

7.1 SNMP TOOLS SCREEN FIELDS . . . . . . . . . . . . . . . . . . .7-1

7.2 GETTING AND SETTING VARIABLES. . . . . . . . . . . . . . .7-4

7.3 SCROLLING THROUGH MIB VARIABLES. . . . . . . . . . . .7-6

7.4 INITIATING A FIRMWARE DOWNLOAD . . . . . . . . . . . . .7-7

1-1

CHAPTER 1

INTRODUCTION

Welcome to the

TRMM/TRMMIM Local Management User’s Guide

.

This manual serves as a simple reference guide for using

TRMM/TRMMIM Local Management (LM) to configure and monitor the

token ring network. This manual reflects Release Version 3.00.00 of the

TRMM/TRMMIM firmware image.

The manual assumes you have a general working knowledge of IEEE

802.5 token ring networks.

1.1 USING THIS MANUAL

This manual is organized into the following chapters:

Chapter 1,

Introduction

, outlines the contents of this manual, briefly

describes features and functions of the management module and LM, and

lists help and reference sources.

Chapter 2,

Accessing Local Management

, describes how to setup the

management terminal, connect it to the management module, and access

LM’s password screen.

Chapter 3,

Using Local Management

, describes how to work with LM

screens and also provides an overview of the application options available

from each menu screen .

Chapter 4,

The Device Setup Menu

, describes all options available from

this screen, including SYSTEM LEVEL, SNMP COMMUNITY NAMES,

SNMP TRAPS, RING SECURITY, and BOOT GATEWAY screens.

Chapter 5,

The Device Status Menu

, describes all options available from

this screen, including the CHASSIS STATUS VIEW and COMPONENT

STATUS VIEW screens.

Chapter 6,

The Device Statistics Screen

, describes all ring configuration

information and performance and error statistics available from this

screen.

INTRODUCTION

1-2

Chapter 7,

The SNMP Tools Screen

, describes how to use SNMP tools

to navigate through the Management Information Bases (MIBs) supported

by the TRMM/TRMMIM.

1.2 GETTING HELP

If you need additional support related to Token Ring/LM for the

TRMM/TRMMIM, or if you have any questions, comments, or

suggestions regarding this manual, contact Cabletron Systems’ Technical

Support. Before calling, please have the following information ready:

• The product name and part number

• The version number of the firmware currently installed in your module

You can contact Cabletron Systems’ Technical Support by any of the

following methods:

By Phone: (603) 332-9400

(Monday through Friday; 8 AM to 8 PM EST)

By Mail: Cabletron Systems

P.O. Box 5005

Rochester, NH 03866-5005

By CompuServe

®

: GO CTRON from any ! prompt

By Internet Mail: [email protected]

By Fax: (603) 335-4743

1.3 TOKEN RING MANAGEMENT MODULES

Both Cabletron Systems’ TRMM and TRMMIM Token Ring

Management Modules are IEEE 802.5 compliant, IBM compatible, and

support Simple Network Management Protocol (SNMP). Both are

designed to be installed into a Cabletron Systems Multi Media Access

Center (MMAC™).

INTRODUCTION

1-3

The TRMM resides in the management (first) slot of the MMAC chassis.

It is designed to manage a full chassis of token ring interface modules.

The TRMMIM also provides the same management functions as the

TRMM to an additional ring from any mid-chassis slot. Both modules can

be used with other Cabletron modules to support a range of Token Ring

and mixed Token Ring and Ethernet configurations in the same MMAC

hub.

Each module has an externally accessible EIA, RS232 COM 2/Console

port which supports LM access via Telnet, a Digital Equipment

Corporation VT200™ or VT300™ series terminal (or emulating

terminal), and a modem-to-terminal configuration. Each module’s

COM 1 port (on older modules, the port labeled Modem) also supports

Uninterruptible Power Supply device monitoring via Cabletron remote

management applications (i.e., LANVIEW, SPECTRUM).

Local Management provides the tools to manage the TRMM/TRMMIM

and all of their attached segments. You can change factory defaults,

configure ring networks via the FNB backplane, enable/disable ports, and

view network statistics. Other features of Local Management allow you to:

• Assign an IP address and a subnet mask.

• Provide network security by controlling access to the ring. You can

prevent unauthorized stations from inserting into the ring.

• Control password access to the TRMM/TRMMIM.

• Designate which Network Management Stations receive trap alarms

from the device.

• View the MIB components supported by your TRMM/TRMMIM.

• Navigate through the TRMM/TRMMIM’s Management Information

Bases (MIB) and manage the objects within it from a remote location,

given the appropriate security level.

• Assign an IP address to a router with Proxy-ARP disabled used for

firmware downloads.

INTRODUCTION

1-4

1.4 RELATED MANUALS

Use the following manuals to supplement the procedures and other

technical data provided in this manual. The procedures contained in these

manuals may be referenced where appropriate, but will not be repeated in

this manual.

Cabletron Systems’

Multi Media Access Center Overview and Set Up

Guide

.

Cabletron Systems’

TRMM/TRMMIM Token Ring Management Module

Installation Guide.

1.5 RECOMMENDED READING

We recommend the following publications if you need more information

to understand or implement a token ring network.

Local Area Networks, Token Ring Access Method

, IEEE Standard 802.5

LAN Troubleshooting Handbook

, Mark Miller (1989, M&T Publishing,

Inc.)

2-1

CHAPTER 2

ACCESSING LOCAL MANAGEMENT

This chapter describes how to access Local Management (LM). The

TRMM/TRMMIM’s COM 2 port supports direct connection to a

management terminal and to a modem for establishing out-of-band LM

sessions. The TRMM/TRMMIM also supports single in-band Telnet

sessions with LM. Using the TRMM/TRMMIM IP address, Telnet to the

module to establish the connection.

NOTE

: Modem setup and attachment procedures for accessing LM are

fully described in the “TRMM/TRMMIM Token Ring Management

Modules Installation Guide.”

2.1 MANAGEMENT TERMINAL CONFIGURATION

You can access Local Management by attaching a management terminal

(or a modem) at the COM 2/Console port on the front of the management

module (see Figure 2-1). The port supports Digital Equipment Corporation

VT200 or VT300 series terminals or a PC software emulation of those

terminals.

Figure 2-1. Local Management Terminal Attachment

Console Port

MMAC-8FNB

C

O

N

S

O

L

E

Local

Managem

ent

Console

TOKEN RING

ACCESSING LOCAL MANAGEMENT

2-2

2.1.1 VT200 or VT300 Series Terminal Setup

If you have a VT200™ or VT300™ series terminal, press

F3

to access the

Setup Directory. Table 2-1 lists the setup requirements for the

management terminal.

Table 2-1. Terminal Setup Requirements

Menu Function Selection

Display Setup: Columns 80 Columns

Controls Interpret Controls

Auto Wrap No Auto Wrap

Text Cursor Cursor

General Setup: Mode VT 100,

7 bit control

Cursor Keys Normal Cursor Keys

Communications

Setup:

Transmit Transmit = 9600

Receive Receive = Transmit

Bits, Parity 8 Bits, No Parity

Stop Bit 1 Stop Bit

Local Echo No Local Echo

Port Data Leads Only

Auto

Answerback

No Auto Answerback

Keyboard Setup: Keys Typewriter Keys

Margin Bell Margin Bell

Warning Bell Warning Bell

Auto

Answerback

No Auto Answerback

ACCESSING LOCAL MANAGEMENT

2-3

2.2 CONFIGURING THE TERMINAL CABLE

Local management can be accessed by direct connection to a management

terminal by using the RS232 cable and one of the three conversion

connectors shipped with the TRMM/TRMMIM. Two converters are

labeled according to the type of terminal (VT Series and PC) they can be

used with. The converter labeled Modem is used for module-to-modem

connections.

The VT Series connector converts the RJ-45 connector on the cable to a

25-pin female connector, the PC connector converts the RJ-45 connector

to a 9-pin female connector, and the Modem connector converts the RJ-45

connector to a 25-pin male connector.

2.2.1 Pinout Configurations

The pinout configuration for a 9-pin to 25-pin (VT series connection) cable

is listed as follows.

9-Pin Male Connector

to

25-Pin Female Connector

(Module End) (Terminal End)

Pin 2 (Transmit) to Pin 3 (Receive)

Pin 3 (Receive) to Pin 2 (Transmit)

Pin 5 (Signal Ground) to Pin 7 (Signal Ground)

Pin 7 (Request to Send) to Pin 5 (Clear to Send)

Pin 8 (Clear to Send) to Pin 20 (Data Terminal Ready)

The pinout configuration for a 9-pin to 9-pin (PC connection) cable is

listed as follows.

9-Pin Male Connector

to

9-Pin Female Connector

(Module End) (Terminal End)

Pin 2 (Transmit) to Pin 2 (Receive)

Pin 3 (Receive) to Pin 3 (Transmit)

Pin 5 (Signal Ground) to Pin 5 (Signal Ground)

Pin 7 (Request to Send) to Pin 8 (Clear to Send)

Pin 8 (Clear to Send) to Pin 7 (Request to Send)

ACCESSING LOCAL MANAGEMENT

2-4

NOTE

: If using a PC with a 25-pin connector, attach a DB-9 to DB-25

converter to the PC to enable LM access connection.

The pinout configuration for a 9-pin to 25-pin (Modem connection) cable

is listed as follows.

9-Pin Male Connector

to

25-Pin Male Connector

(Module End) (Modem End)

Pin 2 (Transmit) to Pin 2 (Transmit)

Pin 3 (Receive) to Pin 3 (Receive)

Pin 5 (Signal Ground) to Pin 7 (Signal Ground)

Pin 7 (Request to Send) to Pin 4 (Request to Send)

Pin 8 (Clear to Send) to Pin 8 (Carrier Detect)

2.2.2 Connecting the Console Cable to a Terminal

To establish a connection between the TRMM/TRMMIM and the

management terminal:

1. Attach the male 9-pin connector to the RS232 port labeled COM 2, or

CONSOLE, on the front of the management module.

2. Attach the female end (25-pin for a VT series terminal or 9-pin for

PCs, as applicable) to the RS232 COMM port on the terminal.

2.3 ACCESSING LOCAL MANAGEMENT

The TRMM/TRMMIM supports only one LM session (from either a

management terminal, modem, or Telnet) at a time. See Section 2.3.1 for

information about LM access restrictions.

To access Local Management:

1. Power on the MMAC in which the management module is installed.

2. Power on the terminal. After a brief warm-up, the Password screen

appears (see Figure 2-2).

ACCESSING LOCAL MANAGEMENT

2-5

Figure 2-2. Local Management Password Screen

3. Enter the Local Management password as follows:

A. Type the password into the

Enter User Password:

field.The

default password is the

Return

key.

Your level of access to Local Management is determined by the

community name that you use for the password. Local

Management is initially shipped with a default Super-user

password of the Return key. You can establish a new Super-user

password at the Community Table screen. Refer to Section 4.2 for

more information.

B. Press

Return

. If you enter an invalid password, the password

prompt remains on screen allowing you to enter the correct

password.

When you enter the correct password, the MAIN MENU appears as shown

in Figure 2-3, indicating that Local Management is ready for operation.

TRMM LOCAL MANAGEMENT

Cabletron Systems, Incorporated

P.O.Box 5005

Rochester, NH 03867-5005

(603) 332-9400

Flash Image Version: 03.00.05

Boot EPROM Version: 02.01.00

Board Revision: 12

Enter User Password:

ACCESSING LOCAL MANAGEMENT

2-6

Figure 2-3. Local Management MAIN MENU Screen

NOTE

: To view POWER UP DIAGNOSTIC tests, power on the

TRMM/TRMMIM after first establishing the terminal connection.

2.3.1 LM Access Restrictions

The module can support only one LM session at a time, regardless of the

methods being used to access it. When attempting to open a second LM

session with the module, the second user will be notified by a screen

display (Figure 2-4) that a session is already in effect and will be presented

with the option to disconnect the current user.

To execute a response option:

• Type

Y

or

y

to disconnect the current LM user or

N

or

n

to not

disconnect the current LM user and press

Enter

. A message

confirming that the current user is being disconnected appears on the

screen after a

Y

or

y

response.

TRMM LOCAL MANAGEMENT Flash Image Version: 03.00.05

MAIN MENU

DEVICE SETUP

DEVICE STATUS

DEVICE STATISTICS

MIB NAVIGATOR

SNMP TOOL

EXIT LM

ACCESSING LOCAL MANAGEMENT

2-7

Figure 2-4. Option to Disconnect Current User Screen

However, the first user disconnected since the TRMM/TRMMIM has been

reset will receive an invitation to reconnect only once. If the first user who

was disconnected bumps the other user out to reconnect and then gets

bumped out again, the first user will have to first re-attach the management

terminal to the module to become eligible to reconnect to LM.

If a third user attempts to access LM while a second user is already

negotiating for a session, the third user will simply be refused connection.

A TRMMIM Local Management Session is currently in use.

(This prompt will time out in 60 seconds)

Would you like to disconnect that user? Y

Disconnecting other user. Please wait ...

3-1

CHAPTER 3

USING LOCAL MANAGEMENT

This chapter describes how to work with LM screen fields. It also

discusses the function of each available selection from the MAIN MENU

Screen.

3.1 WORKING WITH LM SCREEN FIELDS

LM screens contain the following types of fields:

• Editable

: These fields allow you to either type in a discrete value or

select from available discrete values.

• Command

: These fields initiate executable functions such as saving

changes to memory, exiting a screen, viewing another screen, and so

on.

• Static

: These fields cannot be modified and serve only to provide

structure, identification, or context for the screens and the fields within

them.

An active editable field is always set in boldface, and additionally, those

enclosed in parentheses or brackets indicate fields that offer selections.

Use the following steps to alter editable fields:

1. Move the cursor to the desired field in the window using the Up, Left,

Right, or Down Arrow keys, as applicable, to highlight the field. The

cursor flashes in reverse video to indicate the selected field.

2. Type the new value into the field or use the spacebar to select (or

toggle) from values available from the field. The old value will be

replaced.

Incorrect entries (e.g., field value exceeded) are blocked and the field

remains at its original value.

3. Press the Enter key. The new value will be entered into the field.

USING LOCAL MANAGEMENT

3-2

4. Highlight the SAVE command, where applicable, at the bottom of the

screen, and press the Enter key. The new values will be saved to

memory.

3.2 THE MAIN MENU SCREEN

The MAIN MENU screen (shown in Figure 2-3) is the initial point for

accessing all screens and commands.

The following selections are available from the MAIN MENU screen.

DEVICE SETUP

This option accesses another menu screen – the DEVICE SETUP menu

screen. There are several screens available from this menu that allow you

to configure the TRMM/TRMMIM. These include:

• SYSTEM LEVEL

–This screen lets you assign operating parameters to

the

TRMM/TRMMIM, including the Date and Time set at its internal

clock and addressing information such as the

IP address and Subnet

Mask.

• SNMP COMMUNITY NAMES

– This screen allows you to specify

the SNMP Community Names which will be granted access to the

TRMM/TRMMIM, as well as the level accorded each name (Read

Only, Read-Write, Super-user).

• SNMP TRAPS

– As an SNMP device, the TRMM/TRMMIM can

authenticate an SNMP request and issue traps correspondingly. The

SNMP TRAPS screen lets you enable the TRMM/TRMMIM to issue

trap/alarms, and specify the IP addresses of network management

stations that will receive these traps.

• RING SECURITY

– You can use this screen to build a list of MAC

addresses that will be allowed to insert into the

TRMM/TRMMIM-controlled ring and specify security options to take

effect when an unauthorized station attempts to insert into the ring

(Alarm to management, or Alarm and station removal).

• BOOT GATEWAY

– The TRMM/TRMMIM supports firmware

downloads over routers with Proxy-ARP disabled. The BOOT

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