Extreme Networks GBX User manual

Extreme Networks, Inc.
3585 Monroe Street
Santa Clara, California 95051
[phone]
http://www.extremenetworks.com
SummitGbX™Installation
and User Guide
Published: September 1999
Part number: 120040-00 rev. A

ii
Copyright © Extreme Networks, Inc., 1998. All rights reserved. No part of this documentation may be
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from Extreme Networks, Inc.
Extreme Networks, Summit, SummitGbX, and the Extreme Networks logo are trademarks of Extreme
Networks.
All other brand and product names are registered trademarks or trademarks of their respective
holders.

Summit GbX Installation and User Guide 1
SummitGbX™Installation and
User Guide
This document describes the features and installation of the Summit™Gigabit Ethernet
Fiber-Optic Extender (GbX).
SUMMITGbX OVERVIEW
The SummitGbX Gigabit Ethernet Fiber Optic Extender greatly increases the maximum
single mode fiber interconnect distance between Gigabit Ethernet switches from the
standard IEEE 802.3z distance of 500 meters to 80 km (50 miles), or more. The
attenuation characteristics of the installed fiber plant determine the maximum distance
that can be achieved. Links beyond 100 km are possible using an optical amplifier
option.
The SummitGbX is fully compatible with the Gigabit Ethernet IEEE 802.3z standard for
fiber optic interfaces.
Network management and loopback control functions are provided by an RS-232c port.
The SummitGbX supports full duplex operation as defined in IEEE 802.3x. This results
in 2 Gbps of actual link bandwidth, and provides lower latency, due to simultaneous
transmit and receive operations.
Figure 1 shows how the SummitGbX Extender offers network planners an important,
and fundamentally different, way to configure Gigabit Ethernet network by giving users
interconnect distances up to 100 km. In most cases, the SummitGbX allows much
greater freedom in the use of Summit and BlackDiamond™switches, as distance
limitations cease to be a factor.

2Summit GbX Installation and User Guide
SummitGbX Overview
Figure 1: SummitGbX used in a typical configuration
MMF
SMF
SX Ports
SX Port
LDI Port
LDI Port
Building 1
Building 2
SX Port
GbX_cnx

Summit GbX Installation and User Guide 3
Summary of Features
SUMMARY OF FEATURES
The SummitGbX extends the distance of Gigabit Ethernet links on Summit and
BlackDiamond switches to 80 kilometers using single mode fiber. Depending on the
quality of fiber, distances of 100 kilometers, or more, can be achieved. The summary of
features is as follows:
•One full-duplex Gigabit Ethernet fiber optic interface and one full-duplex
long-distance fiber interface
•Full-duplex bandwidth operation with 2 Gbps throughput
•Highly reliable performance and a very low Bit Error Rate (BER) of 10-12
•Standard duplex SC optical connector interface to Summit switches
•Standard SC optical connector for long-distance fiber interface
•Graphical user interface for management, using an RS-232c port
—Loopback diagnostic control
—Signal
—Loss of synchronization
—Over-temperature warning
•Low profile, 1U (1.75 inches)
•Standard 19-inch rack mount
•Dual, redundant, load sharing power supplies
SUMMITGbX FRONT VIEW
Figure 2 shows the front panel view of the SummitGbX.
Figure 2: SummitGbX front panel
TX RX
CLASS 1 LASER
LDI OPTICAL PORT
Status
LEDs
LDI ports Gigabit
port
RX
FLT
LDI
GBE
LDI OPTICAL PORT
TX RX POWER
TEMP
CLASS 1 LASER
GBE OPTICAL PORT
TX RX
CLASS 1 LASER
SYNC
LOSS LOOP BACK
GbX_fr

4Summit GbX Installation and User Guide
SummitGbX Front View
PORTS
The SummitGbX has one 1000BASE-SX port for connecting the SummitGbX to a
Summit or BlackDiamond switch, and one single mode long-distance interface (LDI) for
connecting between two SummitGbX units. Each 1000BASE-SX and LDI port has one
optical transmitter interface (TX) and one optical receiver interface (RX).
LEDS
Table 1 describes the LED behavior on the SummitGbX.
MEDIA TYPES AND DISTANCES
Supported media types and distances are described in Table 2.
Table 1: SummitGbX LEDs
LED Color Indicates
RX FLT
(Receive Fault) Green
Yellow Signal received No signal received
SYNC LOSS
(Synchronization Loss) Green
Yellow Receive clock detected Receive clock not detected
LOOP BACK Green
Yellow In normal mode (no loopback) Loopback mode
POWER Green Power on
TEMP Green
Yellow SummitGbX temperature normal SummitGbX indicating an overheat condition
Table 2: Media Types and Distances
Media Type Standard Media Guaranteed Distance
850nm Multimode
Optics 1000BASE-SX 50/125um Multimode Fiber (500/500 MHz–km)
62.5/125um Multimode Fiber
(160/500 MHz–km)
62.5/125um Multimode Fiber
(200/500 MHz–km)
550 Meters
220 Meters
275 Meters

Summit GbX Installation and User Guide 5
SummitGbX Front View
LONG DISTANCE INTERFACES
Table 3 describes the Long Distance Interface (LDI) specifications.
Note 1: The transmitter output power level for the SummitGbX is +1dBm. The maximum allowable
receiver input power level is -8dBm. Therefore, there is a minimum of 9dB loss required for the link
to operate error-free. This minimum required loss can be achieved using a fiber length of 40 km
(0.25 dB/km provides 10dB loss), or by adding 10dB of fixed optical attenuator at the receiver end.
1550nmSingle mode
Optics 10u Single mode Fiber 100 Kilometers
Table 3: LDI Specifications
Parameter Minimum Typical Maximum
LDI Optical Transceiver
Optical Output Power 0dBm 1dBm See Note 1
Optical ExtinctionRatio 7dB
Center Wavelength 1530nm 1550nm 1565nm
Optical Rise/Fall Time 0.5ns
LDI Optical Receiver
Optical Input Power Sensitivity -34dBm -32dBm
Optical Input Power Maximum -8dBm
Operating Wavelength 1200nm 1550nm 1600nm
Optical Return Loss 27dB
Table 2: Media Types and Distances (continued)
Media Type Standard Media Guaranteed Distance

6Summit GbX Installation and User Guide
SummitGbX Rear View
SUMMITGbX REAR VIEW
Figure 3 shows the rear panel view of the SummitGbX.
Figure 3: SummitGbX rear panel
POWER SOCKET
The SummitGbX automatically adjusts to the supply voltage. The power supply is
autoranging from 100 VAC to 240 VAC.
MANAGEMENT PORT
The console port (9-pin, D-type connector) is used to connect a terminal for local,
out-of-band management.
INSTALLING AND PREPARING THE SUMMITGbX FOR USE
The SummitGbX can be mounted in a rack, or placed free-standing on a tabletop.
PREPARING THE SUMMIT GbX FOR USE
To ensure safe operation of this equipment and personnel using this equipment,
the cautions and warnings in this manual must be followed. This equipment has
been manufactured and tested according to international safety standards. There
are no user-serviceable parts in the SummitGbX.
Console
port
GbX MGMT PORT
Model No. :
Part No. :
Serial No. :
Made in U.S.A.
This version per fax from Diana Miller, 24 April 1998
and phone call 28/4/98
10922
800024-00-A
XXXXX-XXXXX
R3-232C
THIS DEVICE COMPLIES WITH PART 15 OF THE FFC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO
CONDITIONS: (1)THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY
INTERFERENCE RECEIVED, INCLUDING INTERFERENCETHAT
MAY CAUSE UNDESIRED OPERATION. THIS PRODUCT CONFORMS
TO DHHS CFR21 SUBCHPT J.THIS DEVICE IS A CLASS 1 LASER.
3.16T AMP FUSE 3.16T AMP FUSE
GbX_rear

Summit GbX Installation and User Guide 7
Installing and Preparing the SummitGbX for Use
INITIAL INSPECTION
If the shipping container shows signs of damage, keep it, and all packing materials,
until the SummitGbX has been thoroughly tested and verified. Verify that all contents
are complete, according to the list below:
•SummitGbX in electro-static discharge (ESD) bag
•19-inch rack mount kit
•Summit GbX Installation and User Guide (this document)
•Power cords (2)
•Software diskette
If any contents are found missing, or if the SummitGbX is found to be damaged, contact
Extreme Networks immediately for assistance.
POWER REQUIREMENTS
The SummitGbX is designed to accept 100 to 240 VAC, 50 to 60 Hz main power. The
SummitGbX automatically senses and adjusts for the proper AC voltage level.
Failure to properly ground the SummitGbX can result in personal injury or
equipment damage. Connect the power cord only to a receptacle with a
protective safety ground. Do not defeat the earth grounding protection by using
an extension cord or other device that defeats the safety ground connection.
OPERATING ENVIRONMENT REQUIREMENTS
The SummitGbX is designed to operate in a 10 to 50 degree C ambient environment. Do
not restrict the air intake or exhaust vents.
Obstructing the air intake or exhaust of the SummitGbX may produce internal
temperatures leading to device failure. Do not block the intake or exhaust of the
unit. Do not operate the unit outside its specified temperature range.

8Summit GbX Installation and User Guide
Installing and Preparing the SummitGbX for Use
RACK MOUNTING
The SummitGbX is 1U (1.75 inches) high and fits in a standard 19-inch rack.
To rack mount the SummitGbX, follow these steps:
1Place the SummitGbX on a hard flat surface with the front facing toward you.
2Remove the existing screws from the left and right sides of the chassis and keep the
screws for Step 4.
3Locate one of the mounting brackets over the mounting holes on the left side of the
unit.
4Insert the four screws and fully tighten, using a suitable screwdriver.
5Repeat Steps 3 and 4 for the right side of the SummitGbX.
6Insert the SummitGbx into the 19-inch rack and secure the rack mount brackets with
suitable screws (not provided). Ensure that ventilation holes are not obstructed.
7Connect the cables.
FREE-STANDING
The SummitGbX is supplied with four self-adhesive rubber feet. Apply the rubber feet
to the underside of the device by sticking one at each corner of the switch.
CONNECTING TO OTHER DEVICES
To install the SummitGbX, follow these steps:
1Mount the SummitGbX in the equipment rack, or, if the SummitGbX will be located
on a table, place the rubber feet on the bottom of the SummitGbX.
2Connect the 1000BASE-SX port on the first SummitGbX to a Gigabit Ethernet port on
a Summit or BlackDiamond switch, using a multimode (MMF) cable.
3Connect the first SummitGbX to a second SummitGbX, using LDI ports and single
mode fiber (SMF) cables with SC simplex connectors.
4Connect the 1000BASE-SX port on the second SummitGbX to a Gigabit Ethernet port
on a second Summit or BlackDiamond switch, using a multimode fiber (MMF) cable.