Cabletron Systems SEHI-32-34, SEHI-22-24 User Manual
®
Portable Management Application
for the
SEHI-22/24 and SEHI-32/34
User’s Guide
The Complete Networking Solution
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
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SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH DAMAGES.
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Cabletron has tested its software with current virus checking technologies. However, because no antivirus system is 100% reliable, we strongly caution you to write protect and then verify that the
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Copyright © 1996 by Cabletron Systems, Inc. All rights reserved.
Printed in the United States of America.
Order Number: 9030954-E9 October 1996
Cabletron Systems, Inc.
P.O. Box 5005
Rochester, NH 03866-5005
SPECTRUM , MiniMMAC , FNB , Multi Media Access Center , and DNI are registered trademarks,
and Portable Management Application , IRM , IRM2 , IRM3 , IRBM , ESXMIM , ETSMIM , EMME ,
EMM-E6 , ETWMIM , FDMMIM , FDCMIM , MicroMMAC , MRXI , MRXI-24 , NB20E , NB25E , NB30 ,
NB35E , NBR-620 , SEHI , TRBMIM , TRMM , TRMM-2 , TRMM-4 , TRMMIM , TRXI , Media Interface
Module , MIM , and Flexible Network Bus are trademarks of Cabletron Systems, Inc.
UNIX and OPENLOOK are trademarks of Unix System Laboratories, Inc. OSF/Motif and Motif are
trademarks of the Open Software Foundation, Inc. X Window System is a trademark of X Consortium,
Inc. Ethernet and XNS are trademarks of Xerox Corporation. Apple and AppleTalk are registered
trademarks of Apple Computer, Inc. Banyan is a registered trademark of Banyan Systems, Inc.
DECnet is a registered trademark of Digital Equipment Corporation. Novell is a registered trademark
of Novell, Inc. CompuServe is a registered trademark of CompuServe. Sun Microsystems is a
registered trademark, and Sun , SunNet , and OpenWindows are trademarks of Sun Microsystems,
Inc.
i
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ii
Chapter 1 Introduction to SPMA
for the SEHI-22/24 and SEHI-32/34
Using the SEHI User’s Guide...................................................................................... 1-1
What’s NOT in the SEHI User’s Guide . . . ........................................................1-3
Conventions................................................................................................................... 1-3
Screen Displays ......................................................................................................1-3
Using the Mouse ....................................................................................................1-5
Getting Help ..................................................................................................................1-6
SEHI Firmware.............................................................................................................. 1-7
Contents
Chapter 2 Using the SEHI Hub View
Using the Hub View ..................................................................................................... 2-1
Navigating Through the Hub View ....................................................................2-2
Hub View Front Panel........................................................................................... 2-2
Using the Mouse in the Hub View Ports Display............................................. 2-5
Hub View Port Color Codes................................................................................. 2-6
Monitoring Hub Performance..................................................................................... 2-7
Port Display Form.................................................................................................. 2-8
Checking Device Status and Updating Front Panel Info ............................... 2-10
Checking Module Status..................................................................................... 2-11
Checking Repeater Status................................................................................... 2-12
Checking Port Status ........................................................................................... 2-13
Checking Statistics............................................................................................... 2-15
General/Error Statistics............................................................................... 2-16
The SEHI Error Priority Scheme................................................................. 2-18
Protocols/Frames Statistics......................................................................... 2-19
Viewing the Port Source Address List..............................................................2-19
Managing the Hub...................................................................................................... 2-20
Setting the Polling Intervals ............................................................................... 2-21
Enabling/Disabling Ports................................................................................... 2-22
Chapter 3 Link/Seg Traps
What is a Segmentation Trap?.....................................................................................3-1
What is a Link Trap? ..................................................................................................... 3-2
Enabling and Disabling Link/Seg Traps ................................................................... 3-2
Configuring Link/Seg Traps for the Repeater................................................... 3-4
Viewing and Configuring Link/Seg Traps for Hub Modules......................... 3-4
iii
Contents
Viewing and Configuring Link/Seg Traps for Ports ........................................3-5
Chapter 4 Repeater Redundancy
Setting Network Circuit Redundancy........................................................................ 4-1
Configuring a Redundant Circuit........................................................................ 4-2
Monitoring Redundancy..............................................................................................4-5
Chapter 5 Source Addressing
Displaying the Source Address List............................................................................5-1
Setting the Ageing Time ........................................................................................5-4
Setting the Hash Type................................................................................................... 5-4
Locking Source Addresses ...........................................................................................5-5
Source Address Locking on Older Devices........................................................ 5-6
Configuring Source Address Traps.............................................................................5-7
Device-level Traps.................................................................................................. 5-8
Module- and Port-level Traps............................................................................... 5-8
Finding a Source Address ..........................................................................................5-11
Chapter 6 Security
What is LANVIEWsecure?...........................................................................................6-2
The Newest LANVIEWsecure Features..............................................................6-4
Security on Non-LANVIEWsecure Hubs...........................................................6-5
Configuring Security.....................................................................................................6-6
Resetting Learned Addresses.............................................................................6-10
Tips for Successfully Implementing Eavesdropper Protection ..................... 6-11
Enabling Security and Traps...................................................................................... 6-12
Repeater-level Security and Traps .....................................................................6-13
Hub-level Security and Traps............................................................................. 6-14
Port-level Security and Traps .............................................................................6-15
Appendix A SEHI MIB Structure
IETF MIB Support ........................................................................................................A-1
SEHI MIB Structure......................................................................................................A-1
A Brief Word About MIB Components and Community Names..................A-2
Index
iv
Chapter 1
Introduction to SPMA
for the SEHI-22/24 and SEHI-32/34
How to use the SEHI User’s Guide; manual conventions; contacting Cabletron Technical Support;
SEHI firmware versions supported by SPMA
The SEHI-22/24 and SEHI-32/34 are intelligent repeating hubs that provide front
panel ports for network connections and a rear-panel HUBStack Interconnect Bus
port for stackable connections. Both devices fully conform to the IEEE 802.3
Repeater, AUI, and 10BASE-T specifications, and provide the flexibility to connect
networks using a variety of media via RJ45 twisted pair, SMA and ST fiber optic,
thin coax, and AUI EPIM modules. All of the models are functionally identical;
the only difference among them is the configuration of front panel ports: the
SEHI-22 has 12 built-in RJ45 ports and one slot for an EPIM module; the SEHI-24
has 24 built-in RJ45 ports and two EPIM slots; the SEHI-32 has one 50-pin Champ
connector providing 12 twisted pair segments and one EPIM slot; and the SEHI34 has two 50-pin Champ connectors providing 24 twisted pair segments and two
EPIM slots. You can stack as many as four of Cabletron’s SEH non-intelligent
hubs with one SEHI and the entire stack is counted as only one repeater hop. All
SEHI models will transmit re-timed data packets, regenerate preamble, extend
fragments, arbitrate collisions, and automatically partition problem segments.
Since the devices covered by this User’s Guide are functionally identical, they will be
NOTE
jointly referred to throughout the text as the SEHI. Likewise, since the only differences in
the windows for each device will be the device name (SEHI-22, SEHI-24, etc.) and the
number of ports displayed, only the SEHI-24 windows will be shown.
Using the SEHI User’s Guide
Your SPECTRUM Portable Management Application (SPMA) for the SEHI-22/24
and SEHI-32/34 consists of a number of different applications, each of which
provides a portion of the overall management functionality. Each of these
1-1
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
applications can be accessed from the icon menu (if you are using a management
platform) and from the command line (if you are running in stand-alone mode);
in addition, several applications can also be accessed from within the Hub View, a
graphical display of the SEHI and its ports.
The SEHI User’s Guide describes how to use many of the applications included
with the module; note that the instructions provided in this guide apply to the
SEHI regardless of the operating system or management platform you are using.
Instructions for launching each individual function from the command line
(stand-alone mode) are also included in each chapter.
Following is a description of the applications described in this guide; while we
provide as much background information as we can, we do assume that you’re
familiar with Ethernet networks and general network management concepts:
• Chapter 1, Introduction to SPMA for the SEHI-22/24 and SEHI-32/34 ,
describes the SEHI User’s Guide and the conventions used in this and other
SPMA manuals, explains where to find information about the SEHI, and tells
you how to contact Cabletron Systems Technical Support.
• Chapter 2, Using the SEHI Hub View , describes the visual display of the Hub
and explains how to use the mouse within the Hub View; the operation of
some basic functions available only from within the Hub View (changing the
Hub View display, opening menus and windows, enabling and disabling
ports, checking device and port status, and so on) are also described.
• Chapter 3, Link/Seg Traps , describes how to configure link and segmentation
traps to suit your management needs. You can access the Link/Seg Traps
application from the icon menu, the Hub View, or the command line.
• Chapter 4, Redundancy , describes how to configure redundant circuits to keep
your network connections up and running in the event of a single port’s
failure. You can access the Redundancy application from the icon menu, the
Hub View, or the command line.
• Chapter 5, Source Address , describes how to display the Source Address List,
how to set the ageing time, and how to configure source address traps; it also
discusses the effects of source address locking. You can access the Source
Address application from the icon menu, the Hub View, or the command line.
• Chapter 6, Security , describes how to configure intruder protection for all
MIMs installed in the SEHI-controlled hubstack, and how to configure
eavesdropper protection for any installed LANVIEW
SECURE
hubs. You can
access the Security application from the icon menu, the Hub View, or the
command line.
• Appendix A, SEHI MIB Components , lists the IETF MIBs supported by the
SEHI, and describes their arrangement in a series of MIB components. A
description of the objects controlled by each component is also included.
1-2 Using the SEHI User’s Guide
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
What’s NOT in the SEHI User’s Guide . . .
The following standard SPMA tools are available through the SEHI module and
are explained in the SPECTRUM Portable Management Application Tools Guide :
• Charts, Graphs and Meters
• MAC Address Locator
• Community Names
• MIB I, II
• MIBTree
• TFTP Download
• Trap Table
The Charts, Graphs and Meters application is accessible from the Hub View and
the command line; the MAC Address Locator application is accessible from the
platform console window Tools menu; the rest of the tool applications are
available only from the icon menu or the command line.
Instructions on discovering Cabletron devices, creating icons, and accessing the
icon menus within your management platform are included in your Installing
and Using SPECTRUM for... guide. If you are using SPMA for the SEHI in stand-
alone mode — that is, without benefit of a specific network management system
— instructions for starting each application from the command line are included
in each chapter, both in this guide and in the SPMA Tools Guide .
Conventions
The family of SPECTRUM Portable Management Applications can work with a
number of different network management systems running on several different
operating systems and graphical user interfaces. This versatility presents two
documentation problems: first, there is no standard terminology; and second, the
appearance of the windows will differ based on the graphical interface in use. For
the sake of consistency, the following conventions will be followed throughout
this and other SPMA guides.
Screen Displays
SPMA runs under a variety of different operating systems and graphical user
interfaces. To maintain a consistent presentation, screen displays in this and other
SPMA guides show an OSF/Motif environment. If you’re used to a different GUI,
don’t worry; the differences are minor. Buttons, boxes, borders, and menus
displayed on your screen may look a bit different from what you see in the guide,
but they’re organized and labelled the same, located in the same places, and
perform the same functions in all screen environments.
Conventions 1-3
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
Some windows within SPMA applications can be re-sized; those windows will
display the standard window resizing handles employed by your windowing
system. Re-sizing a window doesn’t re-size the information in the window; it just
changes the amount of information that can be displayed (see Figure 1-1). When
you shrink a window, scroll bars will appear as necessary so that you can scroll to
view all the information that is available.
Use the scroll bars
provided to choose
what to display in a
window that’s been
resized
Click here to
display footer
message history
Figure 1-1. Window Conventions
Some windows will also contain a button; selecting this button
launches a History window (Figure 1-2) which lists all footer messages that have
been displayed since the window was first invoked. This window can help you
keep track of management actions you have taken since launching a management
application.
1-4 Conventions
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
Using the Mouse
The UNIX mouse has three buttons. Procedures within the SPMA document set
refer to these buttons as follows:
Figure 1-2. The History Window
Button 1
Button 2
Button 3
Figure 1-3. Mouse Buttons
If you’re using a two-button mouse, don’t worry. SPMA doesn’t make use of
mouse button 2. Just click the left button for button 1 and the right mouse button
when instructed to use mouse button 3.
Conventions 1-5
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
Whenever possible, we will instruct you on which mouse button to employ;
however, menu buttons within SPMA applications will operate according to the
convention employed by the active windowing system. By convention, menu
buttons under the Motif windowing environment are activated by clicking the left
mouse button (referred to as mouse button 1 in SPMA documentation), and there
is no response to clicking the right button (mouse button 3). Under
OpenWindows, menu buttons can be activated by clicking the right button, and
convention dictates that the left button activates a default menu option; within
SPMA, that default option will also display the entire menu. Because of this
difference, references to activating a menu button will not include instructions
about which mouse button to use. All other panels from which menus can be
accessed, and all buttons which do not provide access to menus, will operate
according to SPMA convention, as documented.
Getting Help
If you need additional support related to SPMA, or if you have any questions,
comments, or suggestions related to 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 program that you need help with. SPMA is
modular, which means each application will have a specific revision number.
Where applicable, an INFO button provides the version number; you can also
view the version number for any application by typing the command to start
the application followed by a -v .
You can contact Cabletron Systems Technical Support by any of the following
methods:
By phone: Monday through Friday between 8 AM and 8 PM
Eastern Standard Time at (603) 332-9400.
By mail: Cabletron Systems, Inc.
PO Box 5005
Rochester, NH 03866-5005
By CompuServe
By Internet mail: support@ctron.com
FTP ctron.com (134.141.197.25)
®
: GO CTRON from any ! prompt
Login
Password
By BBS: (603) 335-3358
Modem Setting 8N1: 8 data bits, 1 stop bit, No parity
1-6 Getting Help
anonymous
your email address
For additional information about Cabletron Systems products, visit our World
Wide Web site: http://www.cabletron.com/
SEHI Firmware
SPMA for the SEHI has been tested against firmware versions 1.10.04 and 1.05.03;
if you have an earlier version of firmware and experience problems running
SPMA contact Cabletron Systems Technical Support for upgrade information.
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
SEHI Firmware 1-7
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34
1-8 SEHI Firmware
Using the SEHI Hub View
Navigating through the Hub View, monitoring hub performance; managing the hub
The heart of the SPECTRUM Portable Management Application (SPMA) for the
SEHI is the Hub View, a graphical interface that gives you access to many of the
functions that provide control over the device.
Using the Hub View
There are two ways to open the Hub View: if you are working within a network
management system, you can select the Hub View option from the icon menu;
specific directions for creating a SEHI icon and accessing the icon menu can be
found in the appropriate Installing and Using SPECTRUM for... guide. If you are
running the SEHI module in a stand-alone mode, type the following at the
command line:
Chapter 2
NOTE
spmarun hubstack <IP address> <community name>
The community name you use to start the module must have at least Read access;
for full management functionality, you should use a community name that
provides Read/Write or Superuser access. For more information on community
names, consult the appropriate Installing and Using SPECTRUM for... guide,
and/or the Community Names chapter in the SPMA Tools Guide.
The spmarun script invoked first in the above command temporarily sets the environment
variables SPMA needs to operate; be sure to use this command any time you launch an
application from the command line. This script is automatically invoked when you launch
an application from the icon menu or from within the Hub View.
If there is a hostname mapped to your SEHI’s IP address, you can use <hostname> in
place of <IP address> to launch the Hub View. Please note, however, that the hostname is
not the same as the device name which can be assigned via Local Management and/or
SPMA; you cannot use the device name in place of the IP address.
2-1
Using the SEHI Hub View
Navigating Through the Hub View
Within the Hub View (Figure 2-1), you can click mouse buttons in different areas
of the window to access various menus and initiate certain management tasks.
The following sections describe the information displayed in the Hub View Front
Panel and how to use the mouse in the Hub View Ports Display.
Hub View Front Panel
In addition to the graphical display of the modules, the Hub View gives you
device level summary information. The following Front Panel information
appears below the port display in the Hub View:
Contact Status is a color code that shows the status of the connection between
SPMA and the device:
• Green means a valid connection.
• Blue means that SPMA is trying to reach the device but doesn’t yet know if the
connection will be successful.
• Red means that SPMA is unable to contact or has lost contact with the device.
Front Panel
Device summary information
Figure 2-1. SEHI Hub View
2-2 Using the Hub View
NOTE
Using the SEHI Hub View
Uptime
The time that the device has been running without interruption. The counter
resets to 0 days 00:00:00 (X days HH:MM:SS) when one of the following occurs:
• Power to the device is cycled.
• The device is reset manually.
Date and Time
The date and time are taken from the device’s internal clock.
Device Name
A text field that you can use to help identify the device.
Location
A text field that you can use to help identify the device.
If you have assigned a device name or location that contains more than 19 characters, only
the last 19 will be displayed in the Hub View. Check the Device Status window for the
complete name and/or location, if necessary.
IP Address
The device’s Internet Protocol address. You cannot change the SEHI’s IP address
from SPMA.
MAC Address
The device’s factory-set hardware address. The MAC address cannot be changed.
Using the Hub View 2-3
Using the SEHI Hub View
Clicking on the Device button displays the Device menu, Figure 2-2.
Figure 2-2. SEHI Hub View Device Menu
The Device menu lets you perform the following:
• Open the Device Status window
• Open the Repeater Status window
• Open the Polling Intervals window
• Open the Statistics windows
• Create device-level Pie Charts, Graphs and Meters
• Change the Port Display Form
• Launch the Link/Seg Traps application
• Launch the Redundancy application
• Launch the Source Addressing application
• Launch the Security application.
Note that the Device menu does not provide access to every application which is
available to the SEHI; some information is only available from the Module or Port
menus, and several applications can only be accessed either from the icon menu
(if you are running under a network management platform) or from the
command line (if you are running in stand-alone mode). See Chapter 1,
Introduction to SPMA for the SEHI-22/24 and SEHI-32/34, for a complete list of
applications available to the SEHI and how to access each one.
2-4 Using the Hub View
Using the SEHI Hub View
If you need to call Cabletron’s Technical Support about a problem with the Hub
View application, you’ll need the information provided in the Info window
(Figure 2-3):
SPMA for the SEHI application
version
SEHI firmware revision, firmware
boot prom version, and
hardware version
Figure 2-3. Hub Information Window
Clicking mouse button 1 on the Quit button closes all Hub View application
windows; any open applications which can also be accessed from the command
line or from the icon menu will remain open.
Using the Mouse in the Hub View Ports Display
Each device in your SEHI-managed HUBStack will have its own ports display in
the Hub View; you can access the available ports displays by using the scroll bar
located on the right side of the Hub View Ports Display window, as illustrated in
Figure 2-4. The illustration below also indicates how to use the mouse to access
the Module and Port menus and functions.
Using the Hub View 2-5
Using the SEHI Hub View
Port Display Form
Using the Module or Device menus,
you can change the port display form
shown in the Port Status boxes to
any one of the following:
- Load (% of theoretical maximum)
- Traffic (Pkts/sec)
- Collisions (Colls/sec)
- Errors (Errors/sec, total or by type)
- Frame Sizes (% of total packets)
Module Type
Displays the type of
module, or device,
whose ports are
currently being
displayed in the
Ports Display.
Port Status
The Port Status display changes with
the type of port display format
selected. Statistical selections
display values in a statistic/second
format. Load displays traffic as a
percentage of theoretical maximum
capacity. Port Type displays port
status (ON, OFF, NLK, etc.). Click
mouse button 1 to toggle the port
between enabled and disabled; click
mouse button 3 to display the Port
menu.
Module Index
Indicates the module’s position in
the SEHI-managed stack; the SEHI
itself is always #1. Click mouse
button 1 to open the Module Status
window; click mouse button 3 to
display the Module menu.
Figure 2-4. Mousing Around a Ports Display
Hub View Port Color Codes
The Port Status boxes in the Hub View are color coded to indicate the port’s
connection status. The colors are consistent for all Port Display Forms except
Admin Status; the exceptions are noted below.
• Green indicates that the port is active; that is, the port has been enabled by
management, has a valid Link signal (if applicable), and is able to
communicate with the station at the other end of the port’s cable segment.
Note that an AUI or transceiver port will display as active as long as it has been
enabled by management, even if no cable is connected.
Port Index
Click mouse button 1 to open
the Port Status window; click
mouse button 3 to display the
Port menu.
Scroll Bar
Use the scroll bar to
rotate through the
ports displays for each
hub in the SEHImanaged stack.
2-6 Using the Hub View
• Blue indicates that the port has been disabled through management.
• Yellow indicates that the port is enabled but does not currently have a valid
connection. This usually indicates that the device at the other end of the
segment is turned off.
• Red indicates that the port is enabled, but is not able to pass packets. This
generally means that the port has been segmented by management after
experiencing an excessive number of collisions; for a BNC (thin coax) port,
however, this may only mean that no cable or terminator has been connected.
When the Admin Status port display option is active, only two colors apply: a
port will be displayed in green if it is enabled by management, regardless of
whether or not there is a cable attached or a valid link signal detected; a port
disabled by management will display as blue.
Monitoring Hub Performance
The information displayed in the Hub View can give you a quick summary of
device activity, status, and configuration. SPMA can also provide further details
about device performance via its three-level menu structure. The Device, Module,
and Port menus (Figure 2-5) give you control over the device at these three levels
and give you access to the tools, menus, and windows that let you monitor
specific aspects of device performance, change hub display options, and set SEHI
operating and notification parameters. Remember, though many functions will
operate the same at each level, those accessed via the Device menu control or
provide information about the SEHI-managed stack as a whole; those accessed
via the Module menu control or provide information about a single hub in the
stack; and those accessed via the Port menu control or provide information about
a single port.
Using the SEHI Hub View
Figure 2-5. The SEHI’s Device, Module, and Port Menus
Hub performance data available through these menus includes:
Monitoring Hub Performance 2-7
Using the SEHI Hub View
• Device, Module, and Port status descriptions.
• Device, Module, and Port statistics, which provide a complete breakdown of
packet activity.
• Device, Module, and Port-level pie charts, graphs and meters, for a graphic
representation of the types and levels of traffic passing through the device.
(For more information about pie charts, graphs and meters, see the Charts,
Graphs and Meters chapter in the SPMA Tools Guide.).
Port Display Form
You can change the type of information displayed for each port in the device by
using the Port Display Form option on the Device and Module menus. Changing
the port display form via the Device menu will affect all ports in the SEHIcontrolled stack; changing the display form via the Module menu will affect only
those ports on the selected device.
To change the port display form:
1. Click on the Device button to display the Device menu, or on the Module
Index box to display the Module menu.
2. Dr ag down to P ort Display Form, then right as necessary to select one of the
port display options. The current selection will be displayed in the P ort Display
Form field on the port display.
Port display form options are:
Load
Shows a percentage for each active port that represents that port’s portion of the
theoretical maximum traffic level — for Ethernet networks, 10 megabits per
second.
Collisions
Displays port traffic data in a collisions/second format. The SEHI counts both
receive collisions — those collisions it detects while receiving a transmission —
and transmit collisions — those it detects while transmitting (i.e., a port in the
SEHI-managed stack transmitted one of the colliding packets); however, those
counts are combined and a single total value is displayed.
Errors
Shows port traffic errors in an errors/second format. You can display any one of
the following types of errors:
• Total errors
• Alignment errors
• CRC (Cyclic Redundancy Check) errors
• Runts
• Giants
• OOW (Out-of-Window) Collisions
2-8 Monitoring Hub Performance
NOTE
Using the SEHI Hub View
For error type descriptions, see Checking Statistics, page 2-15.
Frame Sizes
Displays a percentage for each active port that represents what portion of that
port’s traffic is of a specific size, measured in bytes. You can display any one of the
following frame sizes:
• Runts (packets with fewer than 64 bytes)
• 64-127
• 128-255
• 256-511
• 512-1023
• 1024-1518
• Giants (packets with more than 1518 bytes)
For the statistical port display form options listed above, three dashes (- - -) will display
for all inactive ports; any active (green) port will display a numeric value, even if it’s
0.0000.
NOTE
Port T ype
Provides the following administrative information about the port:
• Admin/Link Status indicates the connection status of the port:
- ON indicates that the port has a valid link signal or does not support a link
signal.
- OFF indicates that the port has been turned off through management
action.
- NLK (No Link) indicates that the port does not have a link to a device at
the other end of the cable, or that there is no cable attached.
- SEG (Segmented) indicates that the port has been segmented by the
repeater due to an excessive collision level.
Because BNC thin coax, AUI, and transceiver ports do not support the link feature, the
displayed Admin/Link status for those ports may be misleading: for example, a BNC port
will display as segmented when, in fact, there is no cable or terminator attached or the
cable has been disconnected; an AUI or transceiver port will display as on (with a valid
link signal) even when no cable is attached. Be sure to keep these anomalies in mind when
troubleshooting a device so equipped.
• Admin Status displays either ON or OFF, an indication of whether
management has the port enabled or disabled. A port can be ON but not
operational; for example, under the Admin display, ports that are segmented
or not linked are shown as ON.
Monitoring Hub Performance 2-9
Using the SEHI Hub View
• Active Ports displays either YES or NO for any active (green) port, indicating
whether or not that port has seen any traffic at all since the device was last
initialized or the counters were last reset; this port display form can tell you
whether any port whose statistics are not currently incrementing has seen
some activity in the past. Non-green (presumably inactive) ports will display
three dashes (---), regardless of their past statistical activity.
Checking Device Status and Updating Front Panel Info
The Device Status window (Figure 2-6) is where you change the information
displayed on the Hub View Front Panel and where you can see summary
information about the current state of the device.
To open the Device Status window:
1. Click on the Device button to display the Device menu.
2. Drag down to Status and release.
Figure 2-6. SEHI Device Status Window
Name and Location
These text fields help identify this SEHI-controlled HUBStack. The information
you enter in the Name and Location boxes is written to the SEHI’s MIB and
appears on the Hub View front panel.
Contact
Use the Contact box to record the name and phone number of the person
responsible for the device. Note that the information entered here is not displayed
on the Hub View front panel.
2-10 Monitoring Hub Performance
Date and Time
Displays the current date and time from the SEHI’s internal clock. Although the
fields are static in the window, the front panel display is a real-time presentation.
To change the name, location, contact, date, or time:
1. Highlight the appropriate field and type the new values.
2. Press Enter or Return on the keyboard to save each change before moving
on to another; each change will appear on the front panel as soon as Enter or
Return is pressed.
Chassis Type
Displays the type of chassis used for the device (stand-alone).
Checking Module Status
You can open a Module Status window (Figure 2-7) for any device in the SEHIcontrolled stack. To open the Module Status window:
1. Click mouse button 1 in the Module Index box. (Use the scroll bar to the right
of the ports display to scroll through the available modules.)
Using the SEHI Hub View
or
1. Click mouse button 3 in the Module Index box to display the Module menu.
2. Drag down to Status and release.
Figure 2-7. Module Status Window
Name
This text field can help identify the module, or device; the information entered
here does not appear anywhere else in the Hub View.
To edit the Module Name:
1. Highlight the text in the Name box and type in a new name.
Monitoring Hub Performance 2-11
Using the SEHI Hub View
2. Press Enter or Return on the keyboard to save your changes.
Active Users
Displays the number of active source addresses communicating through this
module.
Module Type
The type of module you are viewing (SEH- or SEHI-22, 24, 32, or 34).
Checking Repeater Status
The Repeater Status window (Figure 2-8) allows you to assign a name to the
SEHI-controlled HUBStack as a whole. To open the Repeater Status window:
1. Click on the Device button to display the Device menu.
2. Drag down to Repeater Status and release.
Figure 2-8. SEHI Repeater Status Window
Name
This field can help identify the SEHI-controlled stack as a whole; the information
entered here is not displayed anywhere else in the Hub View.
To edit the Repeater Name:
1. Highlight the text in the Name box and type in a new name.
2. Press Enter or Return on the keyboard to save your changes.
Active Users
Displays the number of active source addresses communicating through this
module.
2-12 Monitoring Hub Performance
Checking Port Status
You can open a Port Status window (Figure 2-9) for any port in the SEHIcontrolled HUBStack. To open the Port Status window:
1. Click mouse button 1 in the Port Index box.
or
1. Click mouse button 3 in the Port Index or Port Status box to display the Port
menu.
2. Drag down to Status and release.
Using the SEHI Hub View
Figure 2-9. SEHI Port Status Window
Note that the window title includes the module and port number in parentheses;
the rest of the window contains the following fields:
Name
This text field can help identify the port; the information entered here is not
displayed anywhere else in the Hub View.
To edit the Name:
1. Highlight the text in the Name box and type in a new name.
2. Press Enter or Return on the keyboard to save your change.
Link Status
The port’s Link Status tells you whether or not the port has a valid connection to
the node at the other end of the cable segment. The possible Link conditions are:
• Active — The port has a valid connection with the device at the other end of
the port’s cable.
Monitoring Hub Performance 2-13
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