Accton Technology ETHERHUB-16MI+ E0398-R01 User manual

EH1502S
E0398-R01
150858-101
EtherHub-16mi+
Advanced Reference Guide

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Copyright © 1998 by Accton Technology Corporation. All rights reserved.
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EH1502S
E0398-R01
150858-101
EtherHub-16mi+
Intelligent Stackable Multi-segment Ethernet Hub
with 16 10BASE-T (RJ-45) ports, 1 10BASE2 (BNC) port,
and SNMP agent

1
Advanced Reference GuideEtherHub 1500 System
Contents
Introduction 1
Making the Connections Required for System Configuration 1
Onsite Connection 1
Modem Connection 1
In-Band Network Connection 1
Starting the Configuration Program 2
Using Configuration Program 3
System Menu 4
Displaying System Information 4
Changing System Configuration 5
Assigning Trap Managers 5
Downloading System Software 6
Restarting the Agent 6
Reverting Configuration to Factory Settings 6
Save Configuration 6
Reset Configuration 6
Control Menu 7
Configuring Hub Parameters 7
Configuring Port Parameters 8
Defining Backup Ports 8
Setting External Configure Buttons 9
Performance Menu 9
Threshold Menu 10
Threshold Parameters 10
Event Activation 11
Troubleshooting 11
Network Management Access 11
Pin Assignments for Serial Port Connections 11
DB9 Serial Port Pin Description 11
DB9 Port Pin Assignments 11
DB9 Serial Port to RJ-45 Converter Connector Pin Assignment 12
DB9 PC's COM Port to RJ-45 Converter Connector Pin Assignment 12
DB25 RS232 to RJ-45 Converter Connector Pin Assignment 12
Connection from Hub's 9-Pin Serial Port to PC's 9-Pin COM Port 12
Connection from Hub's 9-Pin Serial Port to Modem's 25-Pin DCE Port 13
Connection from Hub's 9-Pin Serial Port to PC's 25-Pin DTE Port 13
Optional Management Software 13
Introduction
The master hub (and connected stack) can be managed through a PC or
modem connection to the hubs serial port, or with SNMP-based network
management software such as AccView/Open. Using the configuration
program, you can perform the following tasks:
Enable/disable any port
Assign backup ports
Set threshold values
Configure SNMP parameters
Display system information or statistics
Download system firmware
Restart the system
Making the Connections Required for System Configuration
The diskette included with the EtherHub-16mi+contains a menu-driven
configuration program. To use this program, make a direct PC or modem
connection to the serial port on the master hub in the stack.
This section describes how to access the menu-driven configuration program via:
Onsite connection
A workstation connected to the serial port on the hub.
Modem connection
A workstation connected to the serial port of a remote hub via modems.
In-band connection
It also describes how to access the embedded SNMP agent over the network
using AccView/Open or other third-party network management software.
Onsite Connection
Attach a PC to the serial port on the master hub. Use the null-modem cable
(and DB9 / RJ-45 converters) provided with this package, or use a null modem
connection that complies with the wiring assignments shown in the back of
this guide.
Modem Connection
Configure the Hub Site: Connect the master hub's DB9 serial port to the
modem's serial port using standard cabling. For most modems, which use a
25-pin port, you will have to provide an RS232 cable with a 9-pin connector on
one end and a 25-pin connection on the other end. You do not have to set the
modem at the hub's site, because the hub will automatically configure it to
auto-answer mode.
Configure the Remote Site: At the remote site, connect the PC's COM port
(COM 1~4) to the modem's serial port.
In-Band Network Connection
The EtherHub 1500 sytem can also be managed from a computer using
network management software such as AccView/Open. However, prior to
accessing the hub, you must first configure it with a valid IP address, subnet
mask, and default gateway using an out-of-band connection.

Advanced Reference GuideEtherHub 1500 System
32
Note: The on-board program only provides access to basic configuration functions. To
access the full range of SNMP mangement functions, you must use SNMP-based
network mangement software. Accton provides Windows-based SNMP software
called AccView/Open with this package. Note that AccView/Opens Hub Manager
module can be easily integrated into most third-party management platforms.
Starting the Configuration Program
Insert the distribution diskette provided with your EtherHub-16mi+into the PC's
floppy drive.Then activate the EtherHub 1500 System Configuration Program
as described below.
Note: 1. When using a PCMCIA modem connection, add the following entry to your
config.sys file: device=cardtalk.sys /A /Com3IRQ=4. If your PC has a PCMCIA
modem or multi-I/O card, set the proper IRQ by typing "EH15SCP/i [irq #]".
2. Help is available by entering "EH15SCP/?".
3. This program can only run under DOS, or in Windows DOS shell.
1. Type "EH15SCP" at the DOS prompt C:\>EH15SCP. Using arrow keys, select
the communication port on the workstation that is connected to the hub.
2. Select the appropriate option from the DCE/DTE dialog box:
Terminal Channel for local hookup, or Modem Channel for remote connection.
3. If setting up a remote connection via modems:
Select Modem Channel to open the Phone List menu as shown below, and
enter the phone number and press [Enter] to start the dialing mechanism.
Once the connection is established, the main menu for out-of-band
configuration appears as shown below.
Using Configuration Program
The EtherHub 1500 System Configuration Program allows you to define
system parameters, manage and control stacked hubs and associated ports,
set threshold levels, and monitor network conditions. The following table
briefly describes the menu selections available for this program.
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Advanced Reference GuideEtherHub 1500 System
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SystemMenu
Menu Description
Information Displays EtherHub system information.
Configuration Modifies various parameter settings necessary for communicating with
the management agent.
Trap Managers Selects management stations to receive trap messages from the system.
Download Downloads a binary file to the SNMP agent.
Restart Resets the SNMP agent.
Factory Settings Reverts all configuration settings to the original factory settings.
Save Configuration Saves the configuration changes made during the current session.
Reset Configuration Restores the last saved configuration.
Displaying System Information - Use the Information command to display and
modify system information about the EtherHub stack, or for quick system
identification. View a description of the system, including:
Field Description
System Description Name and version of the EtherHub-16mi+software.
System Uptime Length of time the EtherHub management agent has been running.
System Name Name assigned to the EtherHub system.
Contact Contact person for the system.
Location Specifies the area or location where the system resides.
Changing System Configuration - Use the Configuration command from the
System Menu to modify current values for the following parameters:
Field Description
IP Address IP address of the agent you're managing. The EtherHub system may
be run on SNMP protocol over UDP/IP transport protocol. In this
environment, all systems on the Internet, such as network interconnection
devices and Network Management Stations (e.g., the PC running
AccView) are assigned an IP address.
MAC Address Hardware address of EtherHub-16mi+.
Subnet Mask Subnet mask of the agent you've selected. This mask identifies the
host address bits used for routing to specific subnets.
Default Gateway Default gateway used in passing trap messages from the EtherHub
agent to the management station.
Default NMS For internal use only.
NMS-Download File For internal use only.
IPX Frame Type The selected format used on the LAN; i.e., type used by the IPX
network where the EtherHub-16mi+is installed. If the specified frame
type is not detected, the EtherHub-16mi+will automatically detect the
current type. (Values: 802.3, Ethernet II, SNAP, 802.2)
IPX Network Number Identifies the IPX network number for the connected slot. You can
disable IPX protocol by setting this number to zero.
Assigning Trap Managers - Use the Trap Managers command from the
System Menu to modify current values for the following parameters:

Advanced Reference GuideEtherHub 1500 System
6 7
Field Description
SNMP Community Names The community strings authorized for trap management access. All
community strings used for IP and IPX Trap Managers must be listed in
this table.
Community Name A community entry authorized for trap management access.
Access Management access is restricted to read-only (RO) or read/write (RW).
Status The status of the current entry can be set to VALID or INVALID.
IP Trap Managers IP management stations selected to receive trap messages from the
system.
IP Address IP address of the management station.
Community Name The community string required for trap management access.
Status The status of the current entry can be set to VALID or INVALID.
IPX Trap Managers IPX management stations selected to receive trap messages from the
system.
Net Number Identifies the IPX network number for the connected slot.
Node ID MAC address of the authorized trap manager.
Community Name The community string required for trap management access.
Status The status of the current entry can be set to VALID or INVALID.
Downloading System Software - Use the Download command from the
System Menu to load available software updates into the agent's flash ROM.
The download file should be an EtherHub binary file from Accton Technology
Corporation; otherwise the agent will not accept it.
Invoking this command brings up the Download dialog box. When all entries
are confirmed, the display will change to show the progress of the download
process. After downloading the new software, the agent will automatically
restart itself. The following describes each entry in the dialog box:
Field Description
Timeout Time to wait for a response.
Retry Number of attempts to make contact.
Filename The binary file to download.
Transferred Block Current number of data block being transferred.
Total Blocks Total number of blocks to transfer.
Restarting the Agent - Use the Restart command from the System menu to
reset a selected agent. LEDs on the agent will light up sequentially as it
executes the initialization test.
Reverting Configuration to Factory Settings - Use the Factory Settings
command from the System menu to change all configuration settings back to
the factory defaults.
Save Configuration - Saves configuration settings made during current session.
Reset Configuration - Restores configuration settings saved the last time.
Control Menu
Menu Description
Hub Includes hub description and commands to isolate/reattach network
connection, or assign hub to a specified segment.
Port Includes port description and command to enable/disable selected port.
Backup Port Defines master/slave port pairs used for emergency backup.
Push Button Enables/disables external Configure button on selected hub.
Configuring Hub Parameters - Use the Hub command from the Control menu
to configure any hub in the stack. (Select the required hub using the <F4> and
<F5> function keys.) This menu provides a brief description of the selected
hub, and also allows you to isolate/reattach the hub from the network.
Field Description
Hub ID Hub identifier within the stack. (Up to 10 hubs may be connected via
the management channel.) Note that hub IDs can only be assigned
using the Configure button as described in the Quick Installation Guide.
Position The physical position in the stack.
Name Any user-defined name for the selected hub.
Status The stack connection may be set to ISOLATED or ATTACHED. Note
that the Isolated LED will be lit if the hub is isolated. (Although the
status of OTHER is provided, this is for internal use only.)
Segment Attach the hub to a specified segment. The appropriate Segment icon
will light up to show that the hub has been connected.
Type Indicates hub type as EH1501S, or EH1502S (Master or Slave).
Firmware Ver. Indicates the current firmware version number.

Advanced Reference GuideEtherHub 1500 System
8 9
Configuring Port Parameters - Use the Port command from the Control menu
to configure the ports for any hub in the stack. (Select the required hub using
the <F4> and <F5> function keys.) This menu provides a brief description of
the selected hub, and also allows you to enable/disable any port in the
selected hub.
Field Description
Hub ID Hub identifier within the stack.
Position The physical position in the stack.
Port Identifier Numeric identifier 1~16 or ALT.
Name User-defined name for selected port.
Type Connection types include 10BASE-T (RJ-45), BNC, AUI or FIBER.
Status Any port may ENABLED or DISABLED.
Part Indicates if the port is partitioned.
Link State Indicates if the port has a valid connection to an external device.
Defining Backup Ports - Use the Backup Port command in the Control Menu to
define up to three master/slave port pairs. If the connection to the master port
fails, the slave port will automatically take over.
Field Description
Backup Set Defines up to three backup port pairs; each of which can be set to
ACTIVE or INACTIVE.
Master Port Pair member serving as the primary link.
Hub Hub ID for the master port.
Port Port identifier for the master port.
Field Description (continued)
Slave Port Pair member serving as the backup link.
Hub Hub ID for the slave port.
Port Port identifier for the slave port.
Setting the External Configure Buttons - Use the Push Button command in
the Control Menu to disable or enable the Configure button on any hub.
PerformanceMenu
Displays statistics for the System (entire stack), selected Segment, selected
Hub, or all Ports on a specified hub. (Select any segment or hub using the
<F4> and <F5> function keys.)
Menu Description
Frames Number of frames passing through this device.
Bytes Number of bytes passing through this device.
Collisions Number of simultaneous node transmissions detected by this device.
Allignment Errors Number of mis-synchronized data packets detected by this device.
CRC Errors Number of Ethernet Cyclic Redundancy Check errors detected by this
device.
Total Errors Total number of errors, including FCS, allignment, Frames Too Long,
Short Events, Late Events, Jabber, and Data Rate Mismatches
detected on this device.
1: The values displayed have been accumulated since the last system reboot or counter reset.

Advanced Reference GuideEtherHub 1500 System
10 11
Threshold Menu
Select the Threshold command from the menu bar to define limits for the
parameters monitored by the hub system. Limits can be set for the System
(entire stack), Any Hub or Any Port, or a Select Hub or Select Port. Variables to
monitor include frames, bytes, collisions, frame allignment errors, CRC errors
or total errors. High and low watermarks may be set. While the trigger action
includes warning, warning and isolate (for hubs), or warning and disable (for
ports). When any threshold is exceeded, the agent will issue an alarm to the
network management station based on the selected action.
To set thresholds:
1. Open the Threshold dialog box from the menu bar.
2. Select the system component (Type: System, Any Hub, Any Port, Select Hub,
Select Port). If you choose Select Hub or Select Port, then choose the Hub
ID or Port ID using the <F2> function key.
3. Select the variable to monitor (Variable: Frames, Bytes, Collisions,
Allignments, CRCs or Total Errors). If you choose Select Hub or Select Port,
then choose the variable Type using the <F2> function key.
4. Input an integer value for the low and high watermarks.
5. Select the appropriate action (Action: INACTIVE, WARNING, WARNING &
ISOLATE for hubs, or WARNING & DISABLE for ports).
6. Implement your settings by pressing the <F3> function key.
Threshold Parameters - Hub/Port parameters include the following items:
Parameter Description
Frame The total number of frames.
Bytes The total number of bytes.
Collisions Multiple packets transmitted over a medium at the same time, making them
unintelligible.
Alignments Frame alignment errors occur when the received frame is a multiple of 8 bits.
CRCs This error occurs when the cyclic redundancy check for a frame is wrong.
(The cyclic redundancy check an error-checking algorithm used to indicate
frame reception errors.)
Total Errors The total number of collisions, frame alignment errors and CRC errors.
Event Activation - After initial event activation (crossing the high watermark),
the monitored variable must reach the low watermark before another event is
activated (again crossing the high watermark).
T: triggered N: not triggered
Notes: 1. The rate for all values is per one second.
2. Threshold entries are stored in the agent.
Troubleshooting
Refer to the Quick Installation Guide for a more detailed listing of troubleshooting
procedures. However, if you have trouble making a connection via SNMP
network management software, then please refer to the following section.
Network Management Access
You can access the EtherHub-16mi+from anywhere within the attached
network. However, you must first configure it with a valid IP address, subnet
mask, and default gateway. If you have trouble establishing a link to the SNMP
agent (with network management software such as AccView/Open), check to
see if you have a valid network connection. Then verify that you entered the
correct IP address from your location. Also, be sure the port through which
you are connecting to the hub has not been disabled. (See the Control Menu
on page 7.) If it has not been disabled, then check the network cabling that
runs between your management site and the stack.
Pin Assignments for Serial Port Connections
DB9 Serial Port Pin Description
The DB9 serial port on the back panel is used to connect the hub to a
management device. The configuration program can be accessed from a PC,
or from a remote location via a modem connection. You can use the
management port to configure port settings (e.g., enabled or disabled), or to
update device firmware. The pin assignments used to connect various device
types to the hub's management port are provided in the following tables.
DB9 Port Pin Assignments
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Advanced Reference GuideEtherHub 1500 System
12 13
DB9 Serial Port to RJ-45 Converter Connector Pin Assignment
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Connection from Hub's 9-Pin Serial Port to PC's 9-Pin COM Port
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DNGS5------DNGS-------5
RSD6--------RTD-------4
STR7>------STC-------8
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Connection from Hub's 9-Pin Serial Port to Modem's 25-Pin DCE Port
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Connection from Hub's 9-Pin Serial Port to PC's 25-Pin DTE Port
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Optional Management Software
SW6120: AccView EtherHub Manager for SunNet Manager
SW6121: AccView EtherHub Manager for OpenView/Windows
SW6122: AccView EtherHub Manager for OpenView/Unix
SW6122: AccView EtherHub Manager for NMS
SW6130: Network Mangement Support Modules for NMM
SW7300: EtherHub 1500 Security Module