Linksys Etherfast User manual

EtherFast®Managed 24-Port
with Dual Gigabit Switch
Use this guide to install:
Linksys EtherFast®Managed 24-Port
with Dual Gigabit Switch (EF24G2M)
User Guide
Instant EtherFast®Series

COPYRIGHT & TRADEMARKS
Copyright © 2001 Linksys, All Rights Reserved. EtherFast is a registered trademark 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 EtherFast®Managed 24-Port with Dual Gigabit Switch is
free from physical defects in material and workmanship under normal use for FIVE
years 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. BE SURE TO HAVE YOUR PROOF OF PURCHASE ON HAND WHEN CALL-
ING. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PUR-
CHASE. When returning a product, mark the Return Authorization Number clearly on
the outside of the package and include a copy of your original proof of purchase. All
customers outside of the United States of America and Canada shall be held responsi-
ble for shipping and handling charges.
IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID FOR THE PROD-
UCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAM-
AGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFT-
WARE, OR ITS DOCUMENTATION. LINKSYS DOES NOT ISSUE REFUNDS. WARRAN-
TY DOES NOT COVER NATURAL DISASTERS OR ACTS OF NATURE.
Linksys makes no warranty or representation, expressed, implied, or statutory, with
respect to its products or the contents or use of this documentation and all accompa-
nying 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
The EtherFast®Managed 24-Port with Dual Gigabit Switch has been tested and found
to comply with the limits for a Class Adigital 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 radi-
ate radio frequency energy and, if not installed and used according to the instructions,
may cause harmful interference to radio communications. However, there is no guaran-
tee that interference will not occur in a particular 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 devices
• Connect the equipment to an outlet other than the receiver’s
• Consult a dealer or an experienced radio/TV technician for assistance
UG-EF24G2M-011029NC JL

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Table of Contents
Introduction 1
Package Contents 2
Getting to Know the Switch 3
LEDs 3
The RJ-45 Ports 5
The Gigabit Ports 5
The Console Port 5
Installing the Switch 6
Pre-Installation Considerations 6
Rack-Mounting the Switch 7
Powering on the Switch 7
Uplinking the Switch 7
Switch Management 8
Overview 8
Configuring the Switch 12
Overview 12
Logging On to the Switch 12
Main Menu 13
System Information Menu 14
Management Setup Menu 17
Device Control Menu 30
Network Monitor Menu 65
System Restart Menu 91
Exit 92
Troubleshooting 93
Common Problems and Solutions 93
Glossary 96
Upgrading Firmware via the Serial Port 96
Glossary 93
Specifications 104
Environmental 104
Warranty Information 105
Contact Information 106
Introduction
Migrate your network to Gigabit speed with the EtherFast®Managed 24-Port with
Dual Gigabit Switch. Perfect for today’s network computing demands, this new
Managed 24-Port Switch from Linksys delivers Layer 3 switching and blazing
transfer speeds for your network applications with integrated Gigabit over cop-
per connectivity.
The Managed 24-Port Switch’s “intelligent” Layer 3 switching and design provide
maximum network control, regulating traffic and eliminating server bottlenecks.
Integrate the Managed 24-Port Switch into your current Ethernet network, and
your data traffic efficiency will improve several times over. Connect your worksta-
tions to the managed 10/100 ports,and speed up access time for all your users in
just one move. Connect your servers through the Gigabit ports for dedicated band-
width of up to 1000Mbps—and you’ve maximized your network potential. Plus,
configuration’s a snap using the Web management interface.
Save money and time with this all-in-one managed solution for Gigabit connectiv-
ity to your servers or Gigabit backbone.
The Linksys EtherFast®Managed 24-Port
with Dual Gigabit Switch

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• One EtherFast®Managed 24-Port with Dual Gigabit Switch
• One Power Cord
• Mounting Brackets (not shown)
• One Serial/Console Cable (not shown)
• User Guide
• Registration Card (not shown)
2
Getting to Know the Switch
Power (Green) The LED will illuminate when the switch is
powered on.
SNMP (Green) The LED will illuminate when the switch is
being managed via SNMP.
Console (Green) The LED will illuminate when the switch is
being managed via the local console.
Fan Failure (Green) The LED will illuminate when a fan has failed.
OverHeat (Green) The LED will illuminate when the switch is
overheating.
PER PORT
LNK (Green) The LED will illuminate when the port is
connected.
Mode (Green) The LED will illuminate when the port is
operating in full-duplex mode.
GIGABIT PER PORT (G1/G2)
LNK (Green) The LED will illuminate when the port
is successfully connected to a network.
ACT (Green) The LED will illuminate when the port is
actively operating.
LEDs
Package Contents

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The EtherFast®Managed 24-Port with Dual Gigabit Switch is equipped with
twenty-four 10/100 RJ-45 ports. These RJ-45 ports support network speeds of
either 10-100Mbps in half-duplex mode, or 20-200Mbps in full-duplex mode.
Auto-sensing technology enables each port to automatically detect the speed
of the device connected to it (10Mbps or 100Mbps), and adjust its speed and
duplex accordingly.
To connect a device to a port, you will need to use a network cable. If you are
using 100BaseTX devices you will need to use UTP Category 5 (or better)
cable. The two Gigabit ports require UTP Category 5e cable (or better).
The EtherFast®Managed 24-Port with Dual Gigabit Switch is equipped with
two Gigabit ports. These ports provide links to high-speed network segments
or individual workstations at speeds of up to 1000Mbps (Gigabit Ethernet).
The two Gigabit ports require UTP Category 5e cable (or better).
The EtherFast® Managed 24-Port with Dual Gigabit Switch is equipped with
a serial port (located on the rear of the switch) that allows you to connect to a
computer (for configuration purposes) using the provided serial cable.
The RJ-45 Ports
The Gigabit Ports
The Console Port
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MODE
COL (Amber) The LED will illuminate when collisions are
detected.
ACT (Amber) The LED will illuminate when there are active
ports.
FDX (Amber) The LED will illuminate when there are ports
operating in full-duplex mode.
100M (Amber) The LED will illuminate when there are ports
transmitting data at 100Mbps.
4
The Reset Button
If your Switch is having problems with network connections, press the Reset
button for five seconds. This clears up any jammed connections, and is simi-
lar to pressing the Reset button on your PC to reboot it.

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The EtherFast®Managed 24-Port with Dual Gigabit Switch can be used as a
free-standing unit, or installed in any standard 19-inch rack.
Use the following instructions to rack-mount the Switch:
Before you begin, disconnect all cables from the Switch.
1. Place the Switch right side up, with the front panel facing you.
2. Position a mounting bracket over the screw holes on one side of the
Switch.
3. Secure the mounting bracket by inserting three screws into the screw
holes. Use a screwdriver to tighten the screws, ensuring that they are
fastened firmly in place.
4. Repeat steps 2 and 3 to install the other mounting bracket on the opposite
side of the Switch.
5. Insert the Switch into the 19-inch rack and secure it with suitable
screws (not provided). Ensure that the ventilation holes are not obstructed.
The rack-mount installation is complete.
You can now re-connect the cables to the Switch.
To power on the Switch, simply connect the AC power cord to the back of the
Switch, and then plug the power cord into an electrical outlet. The Switch
will boot up within approximately 30 seconds.
Any of the 26 ports on the EtherFast®Managed 24-Port with Dual Gigabit
Switch can act as an uplink port, allowing you to uplink to other switches or
hubs using a standard Ethernet connection. UTP Category 5e (or better)
cable is recommended when using the Gigabit ports.
To uplink the switch, connect one end of a network cable into the Switch,
then connect the other end of the cable into the desired network device’s
uplink port.
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Installing the Switch
Fast Ethernet Considerations
If you will be using the Switch for Fast Ethernet (100Mbps) or Gigabit
(1000Mbps) applications, you must observe this guideline:
The maximum UTP cabling length using Category 5 cable is 328 feet (100m).
Full-Duplex Considerations
As previously mentioned, the Switch provides full-duplex support for its RJ-
45 ports. Full-duplex operation allows data to be sent and received simultane-
ously, doubling a port’s potential data throughput.
If you will be using the Switch in full-duplex mode, the maximum UTP cable
length using Category 5e (or better) cable is 328 feet (100 meters).
Positioning the Switch
Before you choose a location for the Switch, observe the following guide-
lines:
• Keep cabling away from sources of electrical noise, power lines, and
fluorescent lighting fixtures.
• Position the Switch away from water and moisture sources.
• To ensure adequate air flow around the Switch, be sure to provide a
minimum of one inch (25mm) clearance.
• Do not stack free-standing Switches more than four units high.
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Rack-Mounting the Switch
Powering on the Switch
Uplinking the Switch
Pre-Installation Considerations

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2. The following screen will appear. Enter a Name for this connection. In
the example below, the name of the connection is EF24G2M. Click the
OK button.
3. The following screen will appear. In the bottom drop down box labeled
Connect using:, click the arrow and choose the COM port that the
Switch will be connected to. In the example below, COM1 is the port
selected. Click the OK button.
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Switch Management
The Linksys EtherFast®Managed 24-Port with Dual Gigabit Switch offers an
easy-to-use, menu-driven configuration program. This program can be
accessed by a console interface, a Web browser, a telnet connection, or
SNMP/RMON. Using this configuration program, you can perform various
switch configuration and management activities, including:
• Enable/disable any port
• Set the communication mode for any port
• Configure SNMP parameters
• Add ports to network VLANs
Local Console Management
You can manage the Switch locally by connecting the switch to a PC or work-
station with terminal emulation software using the serial port.
The serial port settings need to be configured before connecting to the
Switch. In order to change the settings of your port, run the Hyperterminal
program. This program comes packaged with Windows, but it may not be
installed on your computer. It should be located as is shown below (varies
according to operating system). If it is not, consult your Windows documenta-
tion for instructions on installing Hyperterminal.
1. Click the Start button. Select Accessories and then Communications.
Hyperterminal should be one of the options listed in this menu. Select
Hyperterminal.
Overview

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Telnet Management
Telnet management is available after the Switch has been configured with a
valid IP address, subnet mask, and default gateway (for Layer 2 mode) via the
console interface. Use telnet from any computer attached to the network.
SNMP/RMON Management
SNMP/RMON management is available after the Switch has been configured
with a valid IP address, subnet mask, and default gateway (for Layer 2 mode)
via the console interface. Manage the Switch from any network computer
using network management software.
NNoottee::The Switch’s configuration program only provides
access to basic configuration functions. To access the
full range of SNMP management functions, you must use
SNMP-based network management software.
4. When the following screen appears, make sure that the Switch’s serial port
settings are as follows:
BAUD RATE: 19200
DATA BITS: 8
PARITY: None
STOP BITS: 1
FLOW CONTROL: None
Click the OK button.
Web Management
Web management is available after the Switch has been configured with a
valid IP address, subnet mask, and default gateway (for Layer 2 mode) via the
console interface. Use a standard Web browser (Internet Explorer 4.0 or
above, or Netscape Navigator 4.0 or above is suggested) from any computer
attached to the network. The Switch has a default IP address of 192.168.1.254
and a default subnet address of 255.255.255.0.

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Configuring the Switch
The Switch’s menu-driven configuration program may be configured using
the local console, a Web browser, telnet, or SNMP/RMON. The remote man-
agement methods can be used once the IP parameters have been set via the
local console.
When logging on to the Switch, you will receive the following screen prompt:
User Name:
Password:
Enter the default User Name (“admin”), and press Enter. Do not enter any-
thing for the Password, and press Enter.
When you select User Configuration from the Management Setup Menu
(discussed later in this User Guide), you will be allowed to define a new
administrator password.
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After you log on to the Switch, the Main Menu screen will appear.
The Main Menu screen consists of a series of options. Each option leads you
to the screen for that management setting. Highlighting any option selects it;
pressing the Enter key takes you to that screen.
To navigate through the Console Interface, use the Tab or arrow keys to
move, the Enter key to select, and the Esc key to return to the previous selec-
tion. Scroll through choices using the spacebar. Options for the currently
selected item are displayed in the highlighted area at the bottom of the inter-
face screen.
The text string in the top right corner of the screen shows if the Switch is
operating as a Layer 2 switch or as a multilayer routing switch.
• System Information Menu - Displays a basic description of the switch,
including contact information and hardware and firmware versions.
• Management Setup Menu - Adjust the communication parameters, ensur-
ing a reliable connection.
• Device Control Menu - Controls a broad range of functions, including
port mode, port mirroring, port trunking, spanning tree, VLANs, IP sub-
nets, multicast filtering, and routing protocols.
Main Menu
Overview
Logging On to the Switch

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• Network Monitor Menu - Provides access to port statistics, RMON statis-
tics, address tables, VLAN registration and forwarding information, multi-
cast groups, and subnet addresses.
• System Restart Menu - Resets the management agent.
• Exit - Exits the program and terminates communications with the Switch
for the current session.
The System Information Menu displays a basic description of the Switch,
including contact information and hardware and firmware versions.
• System Information - Provides basic system descriptions, including con-
tact information.
• Switch Information - Shows hardware and firmware version numbers,
power status, and Gigabit port usage of the Switch.
Select OK to return to the previous panel.
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System Information
The System Information screen displays descriptive information about the
Switch or system.
• System Description - System hardware description.
• System Object ID - MIB II object identifier for the Switch’s network
management subsystem.
• System Up Time - Length of time the current management agent has been
running. Note that the first value is in centiseconds.
• System Name* - Name assigned to the switch system.
• System Contact* - Contact person for the system.
• System Location* - Specifies the area or location where the system
resides.
* The maximum string length is 99, but the screen only displays 45 charac-
ters. You can use the arrow keys to browse the entire string.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
System Information Menu

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The Management Setup Menu screen allows you to adjust the communication
parameters, ensuring a reliable connection. The new administrator password is
set through this menu. The IP parameters for Web, telnet, or SNMP/RMON
management are set here as well.
• Network Configuration - Includes IP setup, ping facility, and HTTP
setup for the on-board Web agent.
• Serial Port Configuration - Sets communication parameters for the serial
port, including baud rate, console time-out, and screen data refresh inter-
val.
• SNMP Configuration - Activates authentication failure traps and config-
ures communities and trap managers.
• User Configuration - Sets the user names and passwords for system
access.
• TFTP Download - Downloads new version of firmware to update your
system.
• Configuration File - Allows downloading of a configuration file.
Select OK to return to the previous panel.
Management Setup Menu
Switch Information
The Switch Information screen displays hardware and firmware version num-
bers for the main board, as well as the power status.
• Hardware Version - Hardware version of the main board.
• Firmware Version - System firmware version in ROM.
• Serial Number - Serial number of the main board.
• Number of Ports - Number of ports available on this Switch.
• Power Status - Shows if power is active or inactive.
• Fan Power Status - Shows if power to fan is active or inactive.
• G1 Information - Speed of the first Gigabit port.
• G2 Information - Speed of the second Gigabit port.
Select OK to return to the previous panel.
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IP Configuration
The IP Configuration menu allows you to configure the IP parameters.
(Only displayed in Layer 2 mode)
• Interface Type - Indicates IP over Ethernet.
• IP Address - IP address of the Switch you are managing. The system
supports SNMP over UDP/IP transport protocol. In this environment, all
systems on the Internet, such as network interconnection devices, must
have an IP address.
• Subnet Mask - Subnet mask of the Switch. This mask identifies the host
address bits used for routing to specific subnets.
• Gateway IP - Gateway used to pass trap messages from the system to
the management station. Note: The gateway must be defined (when oper-
ating at Layer 2) if the management station is located in a different IP
segment.
• IP State - Specifics whether IP functionality is enabled via manual con-
figuration (default setting), or set by Boot Protocol (BOOTP).
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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Network Configuration
The Network Configuration menu allows you to set the Switch’s IP address,
configure the IP parameters, or enable the on-board Web management.
• IP Configuration* - Sets the bootup option or configure the Switch’s IP
parameters.
• IP Connectivity Test (Ping) - Tests IP connectivity to a specified device.
• HTTP Configuration - Allows the admin to enable or disable the Web
administration.
* This menu does not appear if the Switch is set to multilayer mode. In this
case, you need to configure an IP interface for each VLAN that needs to con-
nect to any device outside of its own VLAN group.
Select OK to return to the previous panel.

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HTTP Configuration
The HTTP Configuration screen allows you to enable or disable Web man-
agement.
Note: Port 80 is used for HTTP service.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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IP Connectivity Test (Ping)
The IP Connectivity Test is used to see if another site or node on the net-
work can be reached.
• IP Address - IP address of the device you want to ping.
• Test Times - The number of ICMP echo requests to send to the specified
site. Range varies from 1 to 1000.
• Success/Failure - The number of times the specified site has responded—
or not—to a ping request.
Note: There is a 10-second interval between pings.
Select Start to begin the test. Select Cancel to cancel the test.
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SNMP Configuration
The SNMP Configuration screen displays parameters for the Simple Network
Management Protocol (SNMP).
• Send Authentication Fail Traps - Issue a trap message to specified IP
trap managers whenever authentication of an SNMP request fails. Default
is enabled.
• SNMP Communities - Assigns SNMP access based on specified strings.
• IP Trap Managers - Specifies management stations that will receive
authentication failure messages or other trap messages from the Switch.
Select OK to return to the previous panel.
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Serial Port Configuration
The Serial Port Configuration screen allows you to access the communication
parameters for the Switch’s serial port.
• Baud Rate - The rate at which data is sent between devices. Default is
19200. Options are 9600, 19200, and 38400 baud.
• Data Bits - Sets the data bits of the RS-232 port. Options are 7 and 8.
• Stop Bits - Sets the stop bits of the RS-232 port. Options are 1 and 2.
• Parity - Sets the parity of the RS-232 port. Default is None. Options are
none, odd, and even.
• Time-Out - If no input is received from the attached device after this
interval, the current session is automatically closed. Default is 10 minutes.
The range is 0 to 100 minutes, where 0 indicates disabled.
• Auto Refresh - Sets the interval before a console session will auto refresh
the console information, such as Spanning Tree Information, Port
Configuration, Port Statistics, and RMON Statistics. Default is 1 second.
The range is 0, or 5 to 255 seconds, where 0 indicates disabled.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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IP Trap Managers
The IP Trap Managers screen specifies management stations that will
receive authentication failure messages or other trap messages from the
Switch. Up to five trap managers may be entered.
• IP Address - IP address of the trap manager.
• Community Name - A community specified for trap management
access.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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SNMP Communities
The SNMP Communities screen allows you to configure the community
strings authorized for management access. Up to five community names
may be entered.
• Community Name - A community entry authorized for management
access. Maximum string length is 19 characters.
• Access - Management access is restricted to Read Only or Read/Write.
• Status - Sets administrative status of entry to enabled or disabled.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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Add User
The Add User screen allows you to add a user.
• User Name - Specifies user authorized management access to the
Switch via the console, telnet, or the Web.
• Password - Sets up the password for the new user.
• Access Right - ADMIN: Read/Write for all screens.
GUEST: Read Only for all screens.
• ConsoleAccess - Authorizes management via the console.
• TelnetAccess - Authorizes management via a telnet connection.
• HTTPAccess - Authorizes management via HTTP, e.g., a Web browser.
Select OK to confirm the changes. Select Cancel to cancel any changes.
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User Configuration
The User Configuration screen to restrict management access based on speci-
fied user names and passwords. There are two user types, Administrator and
Guest. Only the Administrator has write access for parameters governing the
SNMP agent.
• User Name - Specifies user authorized management access to the
Switch via the console, telnet, or the Web.
• Access Right - ADMIN: Read/Write for all screens.
GUEST: Read Only for all screens.
• Console - Authorizes management via the console.
• Telnet - Authorizes management via a telnet connection.
• HTTP - Authorizes management via HTTP, e.g., a Web browser.
Select Add to add a user. Select OK to return to the previous panel.
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Configuration File
The Configuration File screen allows you to load a configuration file on any
Switch on the network.
• Station IP - IP address of the Switch you want the configuration file to
be sent to.
• Operation - Gives you the choice of downloading the configuration file
from your Switch.
Download from switch - Downloads the current switch configura-
tion to a file on the client PC.
Upload to switch - Uploads a configuration file to the Switch from
the client PC.
Select Start to begin the download. Select Cancel to cancel the download.
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TFTP Download
The TFTP Download screen lets you load software updates to permanent
flash ROM in the Switch. After downloading the new software, the agent will
automatically restart itself.
• Download Server IP - IP address of a TFTP server.
• Download Filename - The binary file to download.
• Download Option -You may choose either Runtime Code or Post
Code.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes.
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Note: This screen shots shows the Device Control Menu displayed by a Layer
2 switch.
• IGMP Snooping Configuration - Configures IGMP multicast filtering.
(Only displayed for Layer 2 mode. When the Switch is in multilayer mode,
IGMP Snooping Configuration is available through the IP Menu.)
Select OK to return to the previous panel.
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The Device Control Menu is used to control a broad range of functions,
including port mode, port mirroring, port trunking, Spanning Tree, VLANs,
IP subnets, multicast filtering, and routing protocols.
Note: This screen shots shows the Device Control Menu displayed by a mul-
tilayer switch.
• System Mode - Sets the Switch to operate as a Layer 2 switch or as a mul-
tilayer routing switch.
• Layer 2 Menu - Configures port communication mode, mirror ports, and
port trunking.
• Bridge Menu - Configures the Spanning Tree Protocol for the bridge or
for specific ports, GMRP and GVRP for automatic registration of multi-
cast and VLAN groups, traffic class priority threshold, and address aging
time.
• VLAN Menu - Configures VLAN settings for specific ports, and defines
the port membership for VLAN groups.
• IP Menu - Configures the subnets for each VLAN group, global configu-
ration for unicast and multicast routing protocols, and IGMP snooping.
(Only displayed for multilayer mode)
• Security Menu - Configures security settings here.
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Device Control Menu

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Managed 24-Port with Dual Gigabit Switch
Layer 2 Menu
The Layer 2 Menu contains options for port configuration, port mirroring,
and port trunking.
• Port Configuration - Enables any port, enables/disables flow control,
and sets communication mode to auto-negotiation, full duplex, or half
duplex.
• Mirror Port Configuration - Sets the source and target ports for mir-
roring.
• Port Trunking Configuration - Specifies ports to group into aggregate
trunks.
• Static UnicastAddress Configuration - Used to manually configure
host MAC addresses in the unicast table.
• Static MulticastAddress Configuration - Used to manually configure
host MAC addresses in the multicast table.
Select OK to return to the previous panel.
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System Mode
The System Mode screen lets you set the Switch to operate as a Layer 2
switch or as a multilayer routing switch. As a Layer 2 switch, the Switch
makes all filtering and forwarding decisions based strictly on MAC address-
es. As a multilayer routing switch, it switches packets for all non-IP protocols
based on MAC addresses, and routes all IP packets based on the specified
routing protocol.
• Layer 2 - Filtering and forwarding decisions will be based on MAC
addresses for all protocol traffic.
• Multilayer - Switching based on MAC addresses will be used for all
non-IP protocol traffic, and routing will be used for all IP protocol
traffic.
Select OK to return to the previous panel.
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connected directly to the Switch when its buffers fill. When enabled,
back pressure is used for half duplex and IEEE 802.3x for full duplex.
Note: Flow control should not be used if a port is connected to a hub.
• Jack Type - Shows the jack type for each port. Ports 1-26 are RJ-45.
Select Apply to make changes. Select OK to return to the previous panel.
Select Cancel to cancel any changes. Select Prev Page to view the previous
page. Select Next Page to view the next page.
Mirror Port Configuration
The Mirror Port Configuration screen allows you to mirror traffic from
any source port to a target port for real-time analysis.You can then attach
a logic analyzer or RMON probe to the target port and study the traffic
crossing the source port in a completely unobtrusive manner. When mir-
roring port traffic, the target port must be included in the same VLAN as
the source port.
• Enable Port Mirror - Enables or disables the mirror function.
• Mirrored Ports (Tx/Rx) - The port whose transmitted or received traffic
will be mirrored. Press Add to specify mirrored ports.
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Port Configuration
The Port Configuration screen lets you display or set communication
parameters for any port or module on the Switch, including administrative
status, auto-negotiation, default communication speed and duplex mode,
as well as flow control in use.
• Link Status - Indicates if the port has a valid connection to an
external device.
• Admin Status - Allows you to disable a port due to abnormal behavior
(e.g., excessive collisions), and then re-enable it after the problem has
been resolved.
• Auto Negotiate - Enables or disables auto-negotiation for port speed,
duplex mode, and flow control.
• Default Type - If auto-negotiation is disabled, the port will be set to the
indicated speed and duplex mode.
• Current Type - Indicates the current speed and duplex mode.
• Flow Control - Used to enable or disable flow control. Flow control can
eliminate frame loss by “blocking” traffic from end stations or segments
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