No part of this work may be reproduced in any form or by any
means – graphic, electronic or mechanical, including
photocopying, recording, taping or storage in an information
retrieval system – without prior written permission of the copyright
owner.
The trademarks, logos and service marks ("Marks") displayed
herein are the property of Foundry or other third parties. You are
not permitted to use these Marks without the prior written consent
of Foundry or such appropriate third party.
Foundry Networks, BigIron, FastIron, IronView, JetCore, NetIron,
ServerIron, Tu rb o Ir on , IronWare, EdgeIron, the Iron family of
marks and the Foundry Logo are trademarks or registered
trademarks of Foundry Networks, Inc. in the United States and
other countries.
F-Secure is a trademark of F-Secure Corporation. All other
trademarks mentioned in this document are the property of their
respective owners.
Page 3
COMPLIANCES
FCC - Class A
This equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause interference to radio
communications. It has been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart B of Part 15 of FCC Rules, which are designed to
provide reasonable protection against such interference when operated in a commercial
environment. Operation of this equipment in a residential area is likely to cause interference,
in which case the user, at his own expense, will be required to take whatever measures may be
required to correct the interference. You are cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void your authority to
operate the equipment.
You may use unshielded twisted-pair (UTP) cable for RJ-45 connections—Category 3 or
greater for 10 Mbps connections, Category 5 for 100 Mbps connections and Category 5, 5e,
or 6 for 1000 Mbps connections. Use 50/125 or 62.5/125 micron multimode fiber optic
cable, or 9/125 micron single-mode cable, for SFP transceiver connections.
War ni ngs : 1. Wear an anti-static wrist strap or take other suitable measures to prevent
EC Conformance Declaration - Class A
Contact Foundry Networks at:
Foundry Networks, Inc.
2100 Gold Street
P.O. Box 649100
San Jose, CA 95164-9100
This information technology equipment complies with the requirements of the Council
Directive 89/336/EEC on the Approximation of the laws of the Member States relating to
Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain
voltage limits and the Amendment Directive 93/68/EEC. For the evaluation of the
compliance with these Directives, the following standards were applied:
electrostatic discharge when handling this equipment.
2. When connecting this switch to a power outlet, connect the field ground
lead on the tri-pole power plug to a valid earth ground line to prevent electrical hazards.
RFI
Emission:
• Limit class A according to EN 55022:1998
• Limit class A for harmonic current emission according to
EN 61000-3-2/1995
• Limitation of voltage fluctuation and flicker in low-voltage supply
system according to EN 61000-3-3/1995
War ni ng: Do not plug a phone jack connector in the RJ-45 port. This may damage this
device. Les raccordeurs ne sont pas utilisé pour le systéme téléphonique!
• Product family standard according to EN 55024:1998
• Electrostatic Discharge according to EN 61000-4-2:1995
(Contact Discharge: ±4 kV, Air Discharge: ±8 kV)
• Radio-frequency electromagnetic field according to EN 61000-4-3:1996
(80 - 1000 MHz with 1 kHz AM 80% Modulation: 3 V/m)
• Electrical fast transient/burst according to EN 61000-4-4:1995 (AC/
DC power supply: ±1 kV, Data/Signal lines: ±0.5 kV)
• Surge immunity test according to EN 61000-4-5:1995
(AC/DC Line to Line: ±1 kV, AC/DC Line to Earth: ±2 kV)
• Immunity to conducted disturbances, Induced by radio-frequency
fields: EN 61000-4-6:1996 (0.15 - 80 MHz with
1 kHz AM 80% Modulation: 3 V/m)
• Power frequency magnetic field immunity test according to
EN 61000-4-8:1993 (1 A/m at frequency 50 Hz)
• Voltage dips, short interruptions and voltage variations immunity test
according to EN 61000-4-11:1994 (>95% Reduction @10 ms, 30%
Reduction @500 ms, >95% Reduction @5000 ms)
• EN 60950 (A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)
Industry Canada - Class A
This digital apparatus does not exceed the Class A limits for radio noise emissions from
digital apparatus as set out in the interference-causing equipment standard entitled “Digital
Apparatus,” ICES-003 of the Department of Communications.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils
numériques de Classe A prescrites dans la norme sur le matériel brouilleur: “Appareils
Numériques,” NMB-003 édictée par le ministère des Communications.
Important! Before making connections, make sure you have the correct cord set. Check it
(read the label on the cable) against the following:
Operating VoltageCord Set Specifications
120 VoltsUL Listed/CSA Certified Cord Set
240 Volts (Europe only)Cord Set with H05VV-F cord having three
When using a fiber optic port, never look at the transmit laser while
it is powered on. Also, never look directly at the fiber TX port and
fiber cable ends when they are powered on.
Ne regardez jamais le laser tant qu’il est sous tension. Ne regardez
jamais directement le port TX (Transmission) à fibres optiques et les
embouts de câbles à fibres optiques tant qu’ils sont sous tension.
Niemals ein Übertragungslaser betrachten, während dieses
ÄT
eingeschaltet ist. Niemals direkt auf den Faser-TX-Anschluß und auf
die Faserkabelenden schauen, während diese eingeschaltet sind.
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Parallel blade, grounding type attachment plug rated
15 A, 125 V
conductors with minimum diameter of 0.75 mm
IEC-320 receptacle
Male plug rated 10 A, 250 V
2
The unit automatically matches the connected input voltage. Therefore, no additional
adjustments are necessary when connecting it to any input voltage within the range marked
on the rear panel.
1.Bitte lesen Sie diese Hinweise sorgfältig durch.
2.Heben Sie diese Anleitung für den späteren Gebrauch auf.
3.Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine
Flüssigoder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur
Reinigung.
4.Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.
5.Das Gerät ist vor Feuchtigkeit zu schützen.
6.Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder
Fallen könnte Beschädigungen hervorrufen.
7.Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung
schützt. Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8.Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9.Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte
auch nichts auf der Leitung abgestellt werden.
10Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom
Stromnetz trennen. Somit wird im Falle einer Überspannung eine Beschädigung
vermieden.
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das
Gerät gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit
nur von authorisiertem Servicepersonal geöffnet werden.
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von
einer qualifizierten Servicestelle zu überprüfen:
a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie
mit Hilfe dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen
Nennstrom bis 6 A und einem Gerätegewicht größer 3 kg ist eine Leitung nicht leichter
als H05VV-F, 3G, 0.75 mm
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70 dB(A) oder
weniger.
This guide is for system administrators with a working knowledge of
network management.
You should be familiar with switching and networking concepts.
Nomenclature
This guide uses the following typographical conventions to show
information:
G
1
UIDE
Italichighlights the title of another publication and occasionally
code shows text that must be entered exactly as it appears in this guide.
Note: emphasizes an important fact or calls your attention to a
emphasizes a word or phrase.
dependency.
How to Get Help
If you need assistance, Foundry Networks is committed to ensuring that
your investment in our products remains cost-effective by offering a
variety of support options.
Foundry Networks Technical Support
Foundry Networks technical support will ensure that the fast and easy
access that you have come to expect from your Foundry Networks
products will be maintained.
Foundry’s EdgeIron 4802CF is an intelligent Fast Ethernet
10BASE-T/100BASE-TX ports and two 10/100/1000BASE-T combo
ports that operate in combination with 2 Small Form Factor Pluggable
(SFP) transceiver slots. This switch can easily tame your network with full
support for Spanning Tree Protocol, Multicast Switching, Virtual LANs,
and Layer 2/3/4 CoS services.
EdgeIron 4802CF
fabric. This permits simultaneous wire-speed transport of multiple packets
at low latency on all ports. This switch also features full-duplex capability
on all ports, which effectively doubles the bandwidth of each connection.
Switching Method
The switch uses store-and-forward switching to ensure maximum data
integrity. With store-and-forward switching, the entire packet must be
received into a buffer and checked for validity before being forwarded.
This prevents errors from being propagated throughout the network.
employs a wire-speed, non-blocking switching
Management Options
The
EdgeIron 4802CF
glance” monitoring of network and port status. It also includes a built-in
network management agent that allows the switch to be managed in-band
using SNMP or RMON (Groups 1, 2, 3 and 9) protocols, with a Web
browser, or remotely via Telnet. The switch provides an RS-232 serial port
(DB-9 connector) on the front panel for out-of-band management. A PC
may be connected to this port
band via a
null-modem cable. (See Appendix B for wiring options.)
contains a comprehensive array of LEDs for “at-a-
for configuration and monitoring out-of
The switch provides a wide range of advanced performance-enhancing
features. Port-based and tagged VLANs, plus support for automatic
GVRP VLAN registration and IGMP multicast filtering provide traffic
security and efficient use of network bandwidth. QoS priority queueing
ensures the minimum delay for moving real-time multimedia data across
the network. Flow control eliminates the loss of packets due to bottlenecks
caused by port saturation. Broadcast storm control prevents broadcast
traffic storms from engulfing the network.
For a detailed description of the switch’s advanced features, refer to the
Foundry EdgeIron User Guide..
These are dual-speed RJ-45 ports. Because all ports on this switch support
automatic MDI/MDI-X operation, you can use straight-through cables for
all network connections to PCs or servers, or to other switches or hubs.
(See“100BASE-TX/10BASE-T Pin Assignments” on page B-3.)
Each of these ports support auto-negotiation, so the optimum
transmission mode (half or full duplex), and data rate (10 or 100 Mbps) can
be selected automatically. If a device connected to one of these ports does
not support auto-negotiation, the communication mode of that port can
be configured manually.
Each port also supports IEEE 802.3x auto-negotiation of flow control, so
the switch can automatically prevent port buffers from becoming
saturated.
1000BASE-T/SFP Ports
These are combo Gigabit RJ-45 ports with shared Small Form Factor
Pluggable (SFP) transceiver slots. If an SFP transceiver (purchased
separately) is installed in a slot and has a valid link on the port, the
associated RJ-45 port is disabled.
The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation,
so you can use straight-through cables for all network connections to PCs
or servers, or to other switches or hubs. (See“1000BASE-T Pin
Assignments” on page B-4.)
Foundry provides an optional Redundant Power Unit (RPU) that can
supply power to the switch in the event of failure of the internal power
supply.
Power Supply Receptacles
There are two power receptacles on the rear panel of the switch. The
standard power receptacle is for the AC power cord. The receptacle
labeled “RPU” is for the optional Redundant Power Unit (RPU).
◆48 dual-speed ports for easy Fast Ethernet integration and for
protection of your investment in legacy LAN equipment
◆Two 10/100/1000BASE-T auto-sensing Gigabit Ethernet switching ports
that operate in combination with two Small Form Factor Pluggable (SFP)
transceiver slots
◆Auto-negotiation enables each RJ-45 port to automatically select the
optimum communication mode (half or full duplex) if this feature is
supported by the attached device; otherwise the port can be configured
manually
◆Independent RJ-45 10BASE-T/100BASE-TX ports with support for
auto MDI/MDI-X
◆Unshielded (UTP) cable supported on all RJ-45 ports: Category 3, 4 or
5 for 10 Mbps connections, Category 5 for 100 Mbps connections, and
Category 5, 5e, or 6 for 1000 Mbps connections
◆IEEE 802.3u, IEEE 802.3z, and IEEE 802.3ab compliant
Performance
◆Transparent bridging
◆Provides Store-and-Forward switching
◆Supports flow control, using back pressure for half duplex and IEEE
802.3x for full duplex
◆Auto MDI/MDIX support for the 10/100/1000BASE-T ports
◆Up to 8K-entry, media access control (MAC) address cache
A network switch allows simultaneous transmission of multiple packets via
non-crossbar switching. This means that it can partition a network more
efficiently than bridges or routers. The switch has, therefore, been
recognized as one of the most important building blocks for today’s
networking technology.
When performance bottlenecks are caused by congestion at the network
access point (such as the network card for a high-volume file server), the
device experiencing congestion (server, power user or hub) can be attached
directly to a switched port. And, by using full-duplex mode, the bandwidth
of the dedicated segment can be doubled to maximize throughput.
When networks are based on repeater (hub) technology, the maximum
distance between end stations is limited. For Ethernet, there may be up to
four hubs between any pair of stations; for Fast Ethernet, the maximum is
two. This is known as the hop count. However, a switch turns the hop
count back to zero, so subdividing the network into smaller and more
manageable segments, and linking them to the larger network by means of
a switch, removes this limitation.
3
A switch can be easily configured in any Ethernet or Fast Ethernet
network to significantly boost bandwidth while using conventional cabling
and network cards.
EdgeIron 4802CF
also to provide a wide range of options in setting up network connections.
Some typical applications are described below.
Collapsed Backbone
The
EdgeIron 4802CF
Ethernet installations where significant growth is expected in the near
future. You can easily build on this basic configuration, adding direct fullduplex connections to workstations or servers. When the time comes for
further expansion, just cascade the
Fast Ethernet hub or switch.
is not only designed to segment your network, but
is an excellent choice for mixed Ethernet and Fast
EdgeIron 4802CF
to an Ethernet or
In the figure below, the
EdgeIron 4802CF
is operating as a collapsed
backbone for a small LAN. It is providing dedicated 10 Mbps full-duplex
connections to workstations and 100 Mbps full-duplex connections to
power users and servers.
Fiber optic technology allows for longer cabling than any other media type.
A 1000BASE-LX SFP transceiver link can connect to a site up to 5 km
away. This allows the
EdgeIron 4802CF
providing direct connectivity for a widespread LAN. A Gigabit SFP
transceiver can also be used for a high-speed connection between floors in
the same building, or to connect to other buildings in a campus setting.
The figure below illustrates an
VLANs can be based on port groups, or each data frame can be explicitly
tagged to identify the VLAN group it belongs to. When using port-based
VLANs, ports can either be assigned to one specific group or to all groups.
Port-based VLANs are suitable for small networks. A single switch can be
easily configured to support several VLAN groups for various
organizational entities (such as Finance and Marketing).
When you expand port-based VLANs across several switches, you need to
make a separate connection for each VLAN group. This approach is,
however, inconsistent with the Spanning Tree Protocol, which can easily
segregate ports that belong to the same VLAN. When VLANs cross
separate switches, it is therefore better to use VLAN tagging. This allows
you to assign multiple VLAN groups to the “trunk” ports (that is, tagged
ports) connecting different switches.
Figure 3-4. Making VLAN Connections
R&D
VLAN 1
Tagged
Testing
VLAN 2
Ports
VLAN 3
Finance
VLAN 4
Untagged Ports
Marketing
VLAN
unaware
switch
Tagged Port
Finance
VLAN 3
VLAN 1
VLAN
aware
switch
R&D
Testing
VLAN 2
Note: When connecting to a switch that does not support IEEE 802.1Q
When adding hubs (repeaters) to your network, please follow the standard
connectivity rules for Ethernet, Fast Ethernet, and Gigabit Ethernet.
However, note that because switches break up the path for connected
devices into separate collision domains, you should not include the switch
or connected cabling in your calculations for cascade length involving
other devices.
1000 Mbps Gigabit Ethernet Collision Domain
Maximum 1000BASE-T Gigabit Ethernet Cable Length
Cable TypeMaximum Cable Length
Category 5, 5e, or 6 100-ohm UTP or STP100 m (328 ft)
1. Full-duplex operation only applies to point-to-point access (such as
when a switch is attached to a workstation, server or another switch).
When the switch is connected to a hub, both devices must operate in
half-duplex mode.
2. Avoid using flow control on a port connected to a hub unless it is
actually required to solve a problem. Otherwise back pressure jamming
signals may degrade overall performance for the segment attached to
the hub.
3. For network applications that require routing between dissimilar
network types, you can attach the
router.
4. As a general rule the length of fiber optic cable for a single switched
link should not exceed:
•Gigabit Ethernet — 550 m (1805 ft) for multimode fiber or 5 km
(16404 ft) for single-mode fiber.
EdgeIron 4802CF
units directly to a
However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.
EdgeIron 4802CF
rack or on a flat surface. Be sure to follow the guidelines below when
choosing a location.
◆The site should:
•be at the center of all the devices you want to link and near a
power outlet.
•be able to maintain its temperature within 0 to 50 °C (32 to
122 °F) and its humidity within 5% to 95%, non-condensing
•provide adequate space (approximately two inches) on all sides for
proper air flow
•be accessible for installing, cabling and maintaining the devices
•allow the status LEDs to be clearly visible
◆Make sure twisted-pair cable is always routed away from power lines,
fluorescent lighting fixtures and other sources of electrical
interference, such as radios and transmitters.
◆Make sure that a separate grounded power outlet that provides 100 to
240 VAC, 50 to 60 Hz, is within 2.44 m (8 feet) of each device and is
powered from an independent circuit breaker. As with any equipment,
using a filter or surge suppressor is recommended.
units can be mounted in a standard 19-inch equipment
After unpacking the
have received all the components. Then, before beginning the installation,
be sure you have all other necessary installation equipment.
EdgeIron 4802CF
, check the contents to be sure you
Package Contents
◆
EdgeIron 4802CF
◆Four adhesive foot pads
◆Bracket Mounting Kit containing two brackets and eight screws for
EdgeIron 4802CF
equipment rack or on a desktop or shelf. Mounting instructions for each
type of site follow.
Rack Mounting
Before rack mounting the switch, pay particular attention to the following
factors:
◆Temperature: Since the temperature within a rack assembly may be
higher than the ambient room temperature, check that the
rack-environment temperature is within the specified operating
temperature range. (See page C-2.)
◆Mechanical Loading: Do not place any equipment on top of a
rack-mounted unit.
◆Circuit Overloading: Be sure that the supply circuit to the rack
assembly is not overloaded.
unit can be mounted in a standard 19-inch
M
OUNTING
◆Grounding: Rack-mounted equipment should be properly grounded.
Particular attention should be given to supply connections other than
direct connections to the mains.
1. Insert the power cable plug directly into the receptacle located at the
back of the device.
Figure 4-4. Power Receptacle
2. Plug the other end of the cable into a grounded, 3-pin socket.
Note: For International use, you may need to change the AC line cord.
You must use a line cord set that has been approved for the
receptacle type in your country.
3. Check the front-panel LEDs as the device is powered on to be sure
the Power LED is lit. If not, check that the power cable is correctly
plugged in.
4. If you have purchased a Redundant Power Unit, connect it to the
device and to an AC power source now, following the instructions
included with the package.
EdgeIron 4802CF
collision domains). It may be connected to network cards in PCs and
servers, or to hubs, switches or routers.
Note: Before connecting cables, you may want to first configure the
Spanning Tree Protocol to avoid network loops. Refer to the User
Guide for more information.
is designed to interconnect multiple segments (or
Twisted-Pair Devices
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45
connectors at both ends. For 100BASE-TX connections, Category 5 cable
is required; for 10BASE-T, Category 3, 4 or 5 cable can be used.
5
For 1000BASE-T connections, Category 5, 5e, or 6 (recommended) cable
is required with all four wire pairs connected. You should also test the
cable installation for IEEE 802.3ab compliance. See “1000BASE-T Cable
Requirements” on page B-5.
Cabling Guidelines
The RJ-45 ports on the switch support automatic MDI/MDI-X operation,
so you can use standard straight-through twisted-pair cables to connect to
any other network device (PCs, servers, switches, routers, or hubs).
Note: If auto-negotiation is disabled for an RJ-45 port, the auto-MDI/
MDI-X pin signal configuration is also disabled.
See Appendix B for further information on cabling.
Caution: Do not plug a phone jack connector into an RJ-45 port. This
will damage the switch. Use only twisted-pair cables with RJ-45
connectors that conform to FCC standards.
Connecting to PCs, Servers, Hubs and Switches
1. Attach one end of a twisted-pair cable segment to the device’s RJ-45
connector.
Figure 5-1. Making Twisted-Pair Connections
2. If the device is a network card and the
wiring closet, attach the other end of the cable segment to a modular
wall outlet that is connected to the wiring closet (see “Wiring Closet
Connections” on the next page). Otherwise, attach the other end to an
available port on the switch.
Make sure each twisted pair cable does not exceed 100 meters (328 ft)
in length.
Notes: 1. When connected to a shared collision domain (such as a hub
with multiple workstations), switch ports must be set to
half-duplex mode.
2. Avoid using flow control on a port connected to a hub unless
it is actually required to solve a problem. Otherwise back
pressure jamming signals may degrade overall performance
for the segment attached to the hub.
3. As each connection is made, the green Link LED (on the
) corresponding to each port will light to indicate that the
4802CF
connection is valid.
Wiring Closet Connections
Today, the punch-down block is an integral part of many of the newer
equipment racks. It is actually part of the patch panel. Instructions for
making connections in the wiring closet with this type of equipment
follow.
1. Attach one end of a patch cable to an available port on the switch, and
the other end to the patch panel.
2. If not already in place, attach one end of a cable segment to the back
of the patch panel where the punch-down block is located, and the
other end to a modular wall outlet.
3. Label the cables to simplify future troubleshooting.
Power LED is Off•Internal power supply is disconnected.
•Check connections between the switch, the power
cord, and the wall outlet.
•Contact Technical Support.
Power LED is Red •Internal power supply has failed. Contact your local
dealer for assistance.
Link LED is Off•Verify that the switch and attached device is powered
on.
•Be sure the cable is plugged into both the switch and
corresponding device.
•Verify that the proper cable type is used and its length
does not exceed specified limits.
•Check the adapter on the attached device and cable
connections for possible defects. Replace the defective
adapter or cable if necessary.
A
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in,
you may have a problem with the power outlet, power cord, or internal
power supply. However, if the unit powers off after running for a while,
check for loose power connections, power losses or surges at the power
outlet, and verify that the fans on the unit are unobstructed and running
prior to shutdown. If you still cannot isolate the problem, then the internal
power supply may be defective. In this case, contact Technical Support for
assistance.
Installation
Verify that all system components have been properly installed. If one or
more components appear to be malfunctioning (such as the power cord or
network cabling), test them in an alternate environment where you are sure
that all the other components are functioning properly.
In-Band Access
You can access the management agent in the switch from anywhere within
the attached network using Telnet, a Web browser, or other network
management software. However, you must first configure the switch with a
valid IP address, subnet mask, and default gateway. If you have trouble
establishing a link to the management agent, check to see if you have a
valid network connection. Then verify that you entered the correct IP
address. Also, be sure the port through which you are connecting to the
switch has not been disabled. If it has not been disabled, then check the
network cabling that runs between your remote location and the switch.
Note: The management agent can accept up to four simultaneous Telnet
sessions. If the maximum number of sessions already exists, an
additional Telnet connection will not be able to log into the
system.
Caution: DO NOT plug a phone jack connector into any RJ-45 port.
Use only twisted-pair cables with RJ-45 connectors that
conform with FCC standards.
For 100BASE-TX/10BASE-T connections, a twisted-pair cable must have
two pairs of wires. Each wire pair is identified by two different colors. For
example, one wire might be red and the other, red with white stripes. Also,
an RJ-45 connector must be attached to both ends of the cable.
Caution: Each wire pair must be attached to the RJ-45 connectors in a
specific orientation. (See “Cabling Guidelines” on page 5-1 for
an explanation.)
Figure B-1 illustrates how the pins on the RJ-45 connector are numbered.
Be sure to hold the connectors in the same orientation when attaching the
wires to the pins.
With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for
transmitting data, and pins 3 and 6 for receiving data.
RJ-45 Pin Assignments
Pin Number
1Tx+
2Tx-
3Rx+
6Rx-
1: The “+” and “-” signs represent the polarity of the
wires that make up each wire pair.
Assignment
Because all ports on this switch support automatic MDI/MDI-X
operation, you can use straight-through cables for all network connections
to PCs or servers, or to other switches or hubs. In straight-through cable,
pins 1, 2, 3, and 6, at one end of the cable, are connected straight through
to pins 1, 2, 3 and 6 at the other end of the cable. The table below shows
the 10BASE-T/100BASE-TX MDI and MDI-X port pinouts.
1
PinMDI-X Signal NameMDI Signal Name
1Receive Data plus (RD+)Transmit Data plus (TD+)
2Receive Data minus (RD-)Transmit Data minus (TD-)
3Transmit Data plus (TD+)Receive Data plus (RD+)
6Transmit Data minus (TD-)Receive Data minus (RD-)
No other pins are used.
Note: If auto-negotiation is disabled for an RJ-45 port, the auto-MDI/
1000BASE-T ports switch support automatic MDI/MDI-X operation, so
you can use straight-through cables for all network connections to PCs or
servers, or to other switches or hubs.
The table below shows the 1000BASE-T MDI and MDI-X port pinouts.
These ports require that all four pairs of wires be connected. Note that for
1000BASE-T operation, all four pairs of wires are used for both transmit
and receive.
Use 100-ohm Category 5, 5e, or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the
length of any twisted-pair connection does not exceed 100 meters (328 feet)
PinMDI Signal NameMDI-X Signal Name
1Transmit Data plus (TD1+)Transmit Data plus (TD2 +)
2Receive Data minus (RD1-)Receive Data minus (RD2-)
3Transmit Data plus (TD2+)Transmit Data plus (TD1+)
4Transmit Data plus (TD3+)Transmit Data plus (TD4+)
5Receive Data minus (RD3-)Receive Data minus (RD4-)
6Receive Data minus (RD2-)Receive Data minus (RD1-)
7Transmit Data plus (TD4+)Transmit Data plus (TD3+)
8Receive Data minus (RD4-)Receive Data minus (RD3-)
All Category 5 UTP cables that are used for 100BASE-TX connections
should also work for 1000BASE-T, providing that all four wire pairs are
connected. However, it is recommended that for all critical connections, or
any new cable installations, Category 5e (enhanced Category 5) or 6 cable
should be used. The Category 5e and 6 specifications include test
parameters that are only recommendations for Category 5. Therefore, the
first step in preparing existing Category 5 cabling for running
1000BASE-T is a simple test of the cable installation to be sure that it
complies with the IEEE 802.3ab standards.
Cable Testing for Existing Category 5 Cable
Installed Category 5 cabling must pass tests for Attenuation, Near-End
Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This cable testing
information is specified in the ANSI/TIA/EIA-TSB-67 standard.
Additionally, cables must also pass test parameters for Return Loss and
Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the
ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional Transmission
Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”
Note that when testing your cable installation, be sure to include all patch
cables between switches and end devices.
Adjusting Existing Category 5 Cabling to Run 1000BASE-T
If your existing Category 5 installation does not meet one of the test
parameters for 1000BASE-T, there are basically three measures that can be
applied to try and correct the problem:
1. Replace any Category 5 patch cables with high-performance Category
6 cables.
2. Reduce the number of connectors used in the link.
The DB-9 serial port on the switch’s rear panel is used to connect to the
switch for out-of-band console configuration. The on-board menu-driven
configuration program can be accessed from a terminal, a PC running a
terminal emulation program, or from a remote location via a modem
connection. The pin assignments used to connect to the serial port are
provided in the following tables.
Figure 2-2. DB-9 Console Port Pin Numbers
DB-9 Port Pin Assignments
EIA
Circuit
BB104RxD (Received Data)22
BA103TxD (Transmitted Data)33
AB102SGND (Signal Ground)55
No other pins are used.
CCITT
Signal
DescriptionSwitch’s
DB9 DTE
Pin #
PC DB9
DTE
Pin #
Console Port to 9-Pin DTE Port on PC
Switch’s 9-Pin
Serial Port
2 RXD<---------RXD ------------3 TxD
3 TXD-----------TXD ---------->2 RxD
5 SGND-----------SGND ----------5 SGND
No other pins are used.
IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of
Category 3, 4, or 5 UTP cable.
100BASE-TX
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of
Category 5 UTP cable.
1000BASE-SX
IEEE 802.3z specification for Gigabit Ethernet over two strands of
50/125 or 62.5/125 micron core fiber cable.
1000BASE-LX
IEEE 802.3z specification for Gigabit Ethernet over two strands of
50/125, 62.5/125 or 9/125 micron core fiber cable.
1000BASE-T
IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category
5 or 5e twisted-pair cable (using all four wire pairs).
Auto-Negotiation
Signalling method allowing each node to select its optimum operational
mode (e.g., 10 Mbps or 100 Mbps and half or full duplex) based on the
capabilities of the node to which it is connected.
The difference between the highest and lowest frequencies available for
network signals. Also synonymous with wire speed, the actual speed of the
data transmission along the cable.
Collision
A condition in which packets transmitted over the cable interfere
other. Their interference makes both signals unintelligible.
Collision Domain
Single CSMA/CD LAN segment.
CSMA/CD
CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the
communication method employed by Ethernet, Fast Ethernet, or Gigabit
Ethernet.
End Station
A workstation, server, or other device that does not forward traffic.
with each
Ethernet
A network communication system developed and standardized by DEC,
Intel, and Xerox, using baseband transmission, CSMA/CD access, logical
bus topology, and coaxial cable. The successor IEEE 802.3 standard
provides for integration into the OSI model and extends the physical layer
and media with repeaters and implementations that operate on fiber, thin
coax and twisted-pair cable.
Fast Ethernet
A 100 Mbps network communication system based on Ethernet and the
CSMA/CD access method.
Transmission Control Protocol/Internet Protocol (TCP/IP)
Protocol suite that includes TCP as the primary transport protocol, and IP
as the network layer protocol.
UTP
Unshielded twisted-pair cable.
Virtual LAN (VLAN)
A Virtual LAN is a collection of network nodes that share the same
collision domain regardless of their physical location or connection point
in the network. A VLAN serves as a logical workgroup with no physical
barriers, allowing users to share information and resources as though
located on the same LAN.
IEEE 802.3x flow control 2-3
IGMP 2-2
indicators, LED 2-4
installation
connecting devices to the switch 5-2
desktop or shelf mounting 4-5
port connections 5-1
power requirements 4-1
problems A-2
rack mounting 4-3
RPUs in racks 4-5
site requirements 4-1
wiring closet connections 5-3
L
LED indicators
Power 2-5
problems A-1
RPU 2-5
location requirements 4-1
M
management
agent 2-2
features 2-8
out-of-band 2-2
SNMP 2-2
Web-based 2-2
MIB support C-4
mounting the switch
in a rack 4-3
on a desktop or shelf 4-5
, C-4
N
network
connections 5-1
examples 3-2
null-modem cable 2-2
O
optional
redundant power unit 2-6
out-of-band management 2-2
P
package contents 4-2
password
support 1-2
pin assignments B-2
1000BASE-T B-4
100BASE-TX/10BASE-T B-3
25-pin DTE port B-7
console port B-6
DB-9 B-6
port saturation 2-2
port-based VLANs 3-5
ports, connecting to 5-1
power, connecting to 4-6
problems, troubleshooting A-1
, 2-3
Q
QoS 2-2
R
rack mounting 4-3
rear panel of switch 2-1
rear panel receptacles 2-6
redundant power unit 2-6
RJ-45 port connections 5-1
RJ-45 ports 2-3