Linksys DSHSNMP User manual

Instant EtherFast®Series
Simple Network
Management Protocol
(SNMP) Module
Use this guide to install this
Linksys product:
Simple Network Management Protocol
Module (DSHSNMP)
User Guide
For Use With:
StackPro II 10/100 16-Port Dual-Speed Hub (DSHUB16)
StackPro II 10/100 24-Port Dual-Speed Hub (DSHUB24)

COPYRIGHT & TRADEMARKS
Copyright © 1999 Linksys, All Rights Reserved. Instant EtherFast is a registered trade-
mark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks
of Microsoft Corporation. All other trademarks and brand names are the property of
their respective proprietors.
LIMITED WARRANTY
Linksys guarantees that every SNMP Module is free from physical defects in material
and workmanship under normal use for one (1) year from the date of purchase.If the
product proves defective during this warranty period, call Linksys Customer Support in
order to obtain a Return Authorization number. Warranty is for repair or replacement
only. Linksys does not issue any refunds. BE SURE TO HAVEYOUR PROOF OF PUR-
CHASE AND BAR CODE AND MODEL NUMBER ON HAND WHEN CALLING.
RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PUR-
CHASE AND BAR CODE FROM THE BOX. When returning a product, mark the Return
Authorization number clearly on the outside of the package and include your original
proof of purchase and bar code.
IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID FOR THE
PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUEN-
TIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPA-
NYING SOFTWARE, OR ITS DOCUMENTATION. Linksys makes no warranty or rep-
resentation, expressed, implied, or statutory, with respect to its products or the contents
or use of this documentation and all accompanying software, and specifically disclaims
its quality, performance, merchantability, or fitness for any particular purpose. Linksys
reserves the right to revise or update its products, software, or documentation without
obligation to notify any individual or entity. Please direct all inquiries to:
Linksys P.O. Box 18558, Irvine, CA 92623.
FCC STATEMENT
This equipment has been tested and found to comply with the limits for a Class A digi-
tal device, pursuant to Part 15 of the FCC Rules.These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used according to the instructions, may cause harmful interference to radio com-
munications. However, there is no guarantee that interference will not occur in a partic-
ular installation. If this equipment does cause harmful interference to radio or television
reception, which is found by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment or device
• Connect the equipment to an outlet other than the receiver’s
• Consult a dealer or an experienced radio/TV technician for
assistance
903

Notice:
This is the first FINAL version of
the SNMP user guide for 10 March
1999.It was posted at 5:00PM PST.
Please report any errors via email:
suppor[email protected]

Contents
Introduction 2
About This Guide 3
Managing the Hub 5
Installing The Hardware 6
Using a Telnet Connection 9
The Command Line Interface 10
The Web-Based Interface 23

Introduction
Congratulations on your purchase of a Simple Network
Management Protocol (SNMP) Module for the StackPro II
10/100 Dual-Speed Hub. The module will allow you to control
your hub's activity through advanced SNMP and Remote
Monitoring (RMON) features, as well as adding network secu-
rity and increased data negotiation capabilities.
Since the StackPro II hubs can stack up to six high, you can
manage your entire stack with only one SNMP module. You
can configure protocols, partition ports on any hub in the
stack, set port speeds, manage 100BaseFX fiber optic distance
extender modules, monitor traffic, and perform a host of other
duties to make your network more secure, and to allow your
data to travel as smoothly and error-free as possible. The mod-
ule provides you with the choice of using a command console
interface or a web-based interface to configure your network's
management settings.
As your network needs grow, your StackPro II 10/100 Dual-
Speed Hub Management Module can be updated - just log on
to the Linksys web site, at http://www.linksys.com, and down-
load the latest free firmware upgrade.
About this Guide
This user guide outlines the features, installation, and
firmware upgrade procedures for the StackPro II Management
Module. This printed version of the user guide does not offer
full support for the configuration and use of the StackPro II
Management Module beyond the navigation and use of fea-
tures in the command line interface and the web-based inter-
face.
2

The module's firmware, along with both the web interface and
the command console interface, will be updated regularly to
provide you with the most reliable and current network man-
agement utilities. For this reason, Linksys has made the
SNMP module's full and complete user guide available in PDF
format on the Linksys web site. Whenever you perform a
firmware upgrade, please download or print out the latest ver-
sions of the full user guide and release notes that correspond
to the latest firmware update.
This user guide is intended for system administrators who
have network management experience. If you have never used
an SNMP module or other network management device, it is
recommended that you read the entire user guide, including
the full version available in PDF format on the Linksys web
site before installing and configuring the module. Additional
research may be needed to obtain a full working knowledge of
some of the concepts and terms discussed in this guide.
Getting to Know the Hardware
The SNMP Management Module (DSHSNMP) provides
extensive management support for the following Linksys
products:
• StackPro II 10/100 Dual-Speed 16-Port Hub (DSHUB16)
• StackPro II 10/100 Dual-Speed 24-Port Hub (DSHUB24)
The StackPro II hubs also feature additional expansion options
for fiber optic networking:
•100BaseFX Fiber Optic Distance Extender Module
SC-Type (DSHFXSC)
•100BaseFX Fiber Optic Distance ExtenderModule
ST-Type (DSHFXST)
3

The StackPro II Management Module provides management
options for the Fiber Optic modules as well as the regular RJ-
45 ports for all hubs in the same collision domain. For exam-
ple, when you install an SNMP module in a StackPro II Hub,
you are immediately able to control all of the ports in the
stack.
When used in conjunction with the web interface or the com-
mand console interface, you can use the StackPro II
Management Module to do the following:
• Display a picture of the StackPro II 10/100 hub and monitor
port activity using the web interface
• Generate graphs that show hub or port activity over a select-
ed time period
• Configure each port's security settings
• View hub statistics with RMON on levels 1,2,3 and 9
• Manually control the speed settings (10Mbps, 100Mbps, or
10/100 auto-sensing) for each port on the hub or in the stack.
• Configure hub IP addresses, network protocols, and system
ID settings
• Enable or disable of any port on the hub or in the stack
• Enable, disable, and monitor fiber optic distance extender
modules
• Partition ports
• Generate traps
• Access three security levels of user control
• Configure the console port for use with a modem
• Download free firmware and software upgrades
4

Managing Your Hub
Getting Started
There are two ways in which you can manage your StackPro II
10/100 Dual-Speed Hub with the SNMP Module - through a
command console interface and a Web-based interface.
The command console interface is the first one that you will
use when you first install the module and power on your hub.
The command console interface looks just like a basic text-
based command-line terminal. You can change settings, save
firmware upgrades, manage your ports, and perform other
basic functions. However, the command console interface is
meant to be used primarily as a way to set up your StackPro
Hub's SNMP module for use with the more powerful Web-
based interface.
The Web-based interface allows you to access your manage-
ment module over a network of any kind using a Web browser
or network management application. With a Web browser such
as Microsoft Internet Explorer or Netscape Navigator, (any
browser that supports Java, frames, and HTML 3.2 or higher
will do the trick), you can access the managed hub simply by
entering the IP address of the hub in the browser's address
box.
A network management application, such as Hewlett Packard
OpenView, allows greater control and more features than a
Web browser. The RMON feature of your management mod-
ule can only be utilized by a compatible network management
application.
5

Installing the Hardware
In order to manage a single hub or stack of StackPro II Dual-
Speed hubs, you should insert one SNMP module into one of
the hubs in the stack. Only one SNMP module is needed to
manage each stack of up to 6 hubs.
Follow these instructions to install the SNMP module in a
StackPro II 10/100 hub or a stack of StackPro II 10/100 hubs.
Please read through all of the provided instructions before
continuing with the installation:
1. Turn off the StackPro II hub. If your hub is connected to a
rack, remove it from the rack. Remove the panel on the back
of the unit marked SNMP. For your safety, it is important to do
this in a safe working environment free of excessive clutter,
electromagnetic interference, and dormant static electricity.
2. Carefully insert the SNMP module (with the circuits and
chips facing up). Gently but firmly slide the module into the
slot and push on it until you feel that the module is securely
connected to the slots inside of the hub. The module should be
firmly set - if you can move it by wiggling it, then it is not
properly connected.
3. Find a PC with a free serial port to use as a "terminal". You
will use this computer to configure your SNMP module. Bring
the computer close to the hub and boot it up.
6

Run a terminal program on your PC - for example, run the
HyperTerm program under Windows 95/98 - and set the fol-
lowing parameters
Baud Rate: 38400
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: No
4. Connect your PC to the SNMP module using one of the
PC's active serial ports. Directly connect them using a DB-9
male to DB-9 male serial cable. Do not use a null modem
cable.
5. Turn on the hub.
6. You will see diagnostic messages in the terminal window.
The hub is running a self-test. Please wait for it to finish, and
watch to make sure that the hub passes all of the tests.
7. After the hub finishes its self-test, you will notice that the
LEDs on the hub(s) are displaying management information.
On the hub that is managed, the MNGMNT light will be on.
You will be prompted to enter a password. There are three
access levels. Your access to the hub's management capabili-
ties will be determined by the password that you give.
MANAGER
The manager has access to all functions on the hub and can
configure any of the hub's settings. The default password for
this level is "manager"
7

OPERATOR
The operator can set only the variables under the port-
configuration menu. All other variables are only read-only.
The default password for this level is "operator"
USER
The user level offers read-only access to the hub's settings.
The default password for the user level is "user"
You should change all three of the SNMP module's passwords
under the "Change Password" sub-menu later.
8. Enter the manager password. You will see a command
menu.
9. The first thing you should do is change the hub unit's IP
address. The default address for the hub is 192.168.0.1.
Press 2 to get to the "Protocol Configuration" menu. Give the
hub a unique IP address in this format: nnn.nnn.nnn.nnn
The values for each variable in the address should fall
between 0 and 255. Be sure that the IP address fits into the
Subnet addressing scheme of your network. You can also set
the Subnet Mask and the Routing Address from the "System
Setting" menu.
10. After the IP address has been set, you can manage your
hub by using a Network Management application (such as HP
OpenView) or a web browser from anywhere on the network.
Any browser you use must support frames, Java, and HTML
3.2 or higher.
8

Locating Hubs in the Stack
The find a hub's unit number, start with Unit 1 at the top of
the stack and count downwards. In a stack of 6 StackPro II
hubs, Unit 1 is on the top and Unit 6 is on the bottom.
9

Using the Command Line
Interface
The command line interface can be accessed through the ter-
minal port on the back of the SNMP module or through a tel-
net connection from any computer on the network.
You must configure at least the IP address of the unit using
the command line interface before accessing it through the
web interface.
Before entering the command line interface, the hub will run
several diagnostic tests and it will prompt you to enter a pass-
word. Enter the manager's password. The default password for
the manager access level is "manager". It will remain "manag-
er" until you change it.
The main menu for the command line interface looks like this
Network Management Module Setup Main Menu
--------------------------------------------
[1] System Settings
[2] Protocol Configuration
[4] Restart Management Kit
[5] SNMP Configuration
[7] Port Management
[8] Firmware Update
[9] Modify Password
[S] Save Current Settings
[R] Restore Default Values
[S] Save Current Settings
[R] Restore Default Values
[X] Exit
10

System Settings Menu
You can access the system settings menu by pressing 1 at the
main menu.
Network Management Module Setup System Settings
-------------------------------------------------
[1] System Name: TEST
[2] System Location: LINKSYS
[3] System Contact: SYSADMIN
[X] Exit
Press one of the keys above to change a setting
or Exit: _
Entering any one of the menu options will allow you to
change the information about the managed hub's name, loca-
tion, and contact name.
Once you have entered the new names that you wish to use,
press X to return to the main menu.
11

Protocol Configuration Menu
You can access the protocol configuration menu by pressing 2
at the main menu.
Use this menu to change the hub's IP address, subnet mask,
and default gateway address. The default values for these vari-
ables are shown in the menu below.
Network Management Module Setup Protocol Configuration
--------------------------------------------------
[1] This Hub's IP Address: 192.168.0.1
[2] Subnet Mask: 255.255.255.0
[3] Default Gateway: 192.168.0.254
[X] Exit
Press one of the keys above to change a setting
or Exit: _
Once you have entered the new values that you wish to use,
press X to return to the main menu.
12

Restart Management Kit
This menu is accessed by pressing 4 at the main menu. It
allows you to reset the stack, which simulates the action of
powering the stack of hubs off and then back on. This requires
you to log in again.
Resetting the stack will cause an interruption in Network traf-
fic and some data may be lost.
If you wish to keep any work that you've done, be sure to save
your current settings (selection S at the main menu) before
you continue.
13

SNMP Configuration Menu
You can access the SNMP configuration menu by pressing 5
at the main menu. The Trap Receivers menu is a sub-menu of
the SNMP configuration menu and can be accessed by press-
ing T.
Network Management Module Setup SNMP Configuration
--------------------------------------------------
[1] SNMP Read Community: PUBLIC
[2] SNMP Read/Write Community: PRIVATE
[3] SNMP Authentication: ENABLED
[T] Trap Receivers Menu
[X] Exit
Press one of the keys above to change a setting
or Exit: _
Use this menu to change the SNMP access properties. The can
SNMP authentication can be toggled by pressing 3. The
default values and locations for these variables are shown in
the menu above.
Once you have entered the new values that you wish to use,
press T to enter the trap receivers menu or X to return to the
main menu.
14

Trap Receivers Sub-Menu
Once inside the trap menu, you can add, delete, or change
entries on the table. A sample menu is shown below.
Network Management Module Setup SNMP/Trap Menu
--------------------------------------------------
Entry Address Community Protocol
--------------------------------------------------
[1] 192.168.0.100 PUBLIC IP
[2] 192.168.0.34 PUBLIC IP
[3] 192.168.0.76 PUBLIC IP
[A] Add New Table Entry
[D] Delete Table Entry
[X] Exit
Press a number (1-3) to change an existing table
entry, or press A to Add, D to Delete, or X to
Exit:
By pressing the table entry ID number, you can edit the entry's
IP address, read community and protocol values. Once you are
finished editing the table, press X to return to the SNMP
Configuration menu. Press X once more to return to the main
menu.
15

Port Management Menu
You can access the port management menu by pressing 7 at
the main menu.
Use this menu to set the speed of any particular port or multi-
ple ports on any hub in the stack.You can also partition any
port in the stack.
The menu looks like this:
Network Management Module Setup Port Management
--------------------------------------------------
[1] Currently Selected Hub:
[2] Hub's Port Speed:
[3] Enable/Disable Ports:
[X] Exit
Press one of the keys above to change a setting
or Exit: _
16

Currently Selected Hub -- selection [1]
Here, you have an opportunity to select which hub in the stack
you want to manage. Choose an ID number between 1 and 6.
Network Management Module Setup Port Management/Choose Hub
--------------------------------------------------
Each hub in the stack has its own ID number.
Enter the ID number of the hub to configure, or X
to Exit: _
The find a hub's unit number, start with Unit 1 at the top of
the stack and count downwards. In a stack of 6 StackPro II
hubs, Unit 1 is on the top and Unit 6 is on the bottom.
After you have selected the hub that you want to manage,
press X to return to the port management menu.
17