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.

Summit GbX Installation and User Guide 9
Installing and Preparing the SummitGbX for Use
POWERING ONTHE SUMMITGbX
To turn on power to the SummitGbX, connect the power cable to the SummitGbX and
then to the wall outlet. Turn the On/Off switch to the On position.
CONNECTING EQUIPMENT TO THE SUMMITGbX CONSOLE PORT
Connection to the console port, located on the rear of the unit, is used for direct local
management. The SummitGbX console port settings are set as follows:
• Baud rate — 9600
• Data bits — 8
• Stop bit — 1
•Parity— None
•Flowcontrol— XON/XOFF
The terminal connected to the console port must be configured as a VT-100 terminal,
with the same settings. This procedure is described in the documentation supplied with
the terminal.
Ensure that text wrapping is disabled, and local echo text is enabled on your
terminal.
Appropriate cables are available from your local supplier. To make your own cables,
pin-outs for a DB-9 male console connector are described in Table 4.
Table 4: Console Connector Pin-Outs
Function Pin Number
TXD (transmit data) 3
RXD (receive data) 2
GND (ground) 5

10 Summit GbX Installation and User Guide
Managing the SummitGbX
Figure 4 shows the pin-outs for a 9-pin to 25-pin (RS-232) null-modem cable.
Figure 4: Null-modem cable pin-outs
Figure 5 shows the pin-outs for a 9-pin to 9-pin (PC-AT) null-modem serial cable.
Figure 5: PC-AT serial null-modem cable pin-outs
The null modem cable used for other Summit and BlackDiamond switches is
compatible for use with the SummitGbX.
MANAGING THE SUMMITGbX
There are two ways to access the SummitGbX for management:
•The GUI installed on a PC.
•A VT100 terminal or a PC running terminal emulation software.
Screen
TxD
RxD
Ground
Cable connector: 9-pin female
SummitGbX Cable connector: 25-pin male/female PC/Terminal
Screen
RxD
TxD
Ground
Shell
3
2
5
1
3
2
7pin_GbX1
Screen
TxD
RxD
Ground
Cable connector: 9-pin female
SummitGbX Cable connector: 9-pin female PC-AT Serial Port
Screen
RxD
TxD
Ground
Shell
3
2
5
Shell
2
3
5pin_GbX2

Summit GbX Installation and User Guide 11
Managing the SummitGbX
USING THE GRAPHIC USER INTERFACE
This section describes how to use the GUI to manage the SummitGbX.
SYSTEM REQUIREMENTS FOR THE GUI
The GUI can be loaded on a PC that meets the following minimum requirements:
•Windows 95 or Windows NT version 4.0
•64 MB RAM
•100 MB disk space
•200 Mhz Pentium CPU
•1.44 Mb 3.5" floppy drive (if you are using the supplied floppy diskette to load the
application)
•A network connection (if you are downloading the application from the Extreme
Networks web site:
http://www.extremenetworks.com/extreme/support/installgbx.htm )
INSTALLING THE GUI
To install the GUI on your PC, first copy the file SummitGbX_GUI.zip into any folder on
the hard disk (for example, a newly created SummitGbX folder.) Either copy the file
from the supplied diskette, or download the file from the Extreme Networks web site,
and save it to the folder.
Complete the installation following these steps:
•Unzip the contents of SummitGbX_GUI.zip into the same folder.
•Double-click setup.exe.
•Follow the prompts, filling in appropriate system and directory information.
The MonitorGbX icon is created on the Microsoft Office toolbar. Double-click this icon
to launch the GUI application.
REMOVING THE GUI
To uninstall the GUI, use Add/Remove Programs from the control panel. Then,
manually delete any remaining files from the folder.

12 Summit GbX Installation and User Guide
Managing the SummitGbX
USING THE GUI
To launch the GUI application, double-click the MonitorGbX icon from the Office
toolbar. The GbX Monitor window appears, as shown in Figure 6.
Figure 6: GbX Monitor window
The GbX Monitor buttons are described in Table 5.
Table 5: GbX Monitor Buttons and Functions
Button Description
Com1 Connect GbX Monitor on Com1 to SummitGbX.
Com2 Connect GbX Monitor on Com2 to SummitGbX.
Disconnect Disconnect GbX Monitor.
Login Log in to SummitGbX.
Logout Log out of SummitGbX.
Modify Login Modify login name and password (maximum 15 characters).

Summit GbX Installation and User Guide 13
Managing the SummitGbX
By default, the login user name is admin, and the default password is admin. The login
name and password are case sensitive.
When enabling the loopback mode on any interface, disable the Gigabit Ethernet
ports on all connected Summit switches.
USING TERMINAL EMULATION
This section describes how you can manage the SummitGbX using the command line
interface (CLI) via a VT100 terminal, or a PC running terminal emulation software.
Communication to and from the SummitGbX is by ASCII text, using the printable ASCII
character set.
The following characters are permitted:
!"#$%&'()*+-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ
[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
A blank space is also allowed, and all user entries must be terminated with the [Enter]
key.
Model Info Display SummitGbX model information.
Display Loop Back
Control Enable/disable loop back control, including LDI loop back and GBE loop back.
Change GbX Name Modify SummitGbX name (maximum 11 characters).
Request Status Display status information.
Request Version Display version information.
About Display Extreme Networks information.
Save Window Save configuration changes
Clear Window Clear window.
Table 5: GbX Monitor Buttons and Functions (continued)
Button Description

14 Summit GbX Installation and User Guide
Managing the SummitGbX
COMMANDS
Table 6 describes the CLI commands.
The factory default login user name is admin and the default password is admin. The
login name and password are case sensitive.
If VT-100 local echo is enabled, the typed text appears on the local screen.
The first time the system is powered on with the terminal connection plugged in, the
factory default status message appears. Press the [Enter] key to display the login screen.
To log in to the SummitGbX, follow these steps:
1Type CMD USR admin, followed by the [Enter] key.
The cursor blinks at the left edge of the screen, under the command just typed.
Table 6: CLI Commands
Command Description
Configuration/Status Mode Commands
CMD GLE Enable Gigabit Ethernet loopback.
CMD GLD Disable Gigabit Ethernet loopback.
CMD LLE Enable long distance loopback.
CMD LLD Disable long distance loopback.
CMD RS? Request status.
CMD V? Request software version.
CMD ID xxxxxxxxxxx
Set unit identification (maximum 11 Characters)
CMD I? Display the factory model and serial numbers.
Password Mode Commands
CMD USR xxxxxx
Enter login name.
CMD PAS xxxxxx
Enter password.
CMD CUSR xxxxxx
Change login name (maximum 15 characters)
CMD CPAS xxxxxx
Change password (maximum 15 characters).
CMD LOG Logout.
Version Commands
CMD V? Displays unit identification and software version number.

Summit GbX Installation and User Guide 15
Managing the SummitGbX
2Type CMD PAS admin, followed by the [Enter] key.
The screen displays login complete.
STATUS
Status messages are sent under several circumstances:
•When an error condition occurs.
•When an error condition clears.
•Approximately every 15 minutes.
•When requested by the user.
•When power is applied to the unit.
The format of the status message is identical in all cases. Figure 7 shows the format of a
status response and Table 7 gives a description of each field. The columns identified by
number hold variable data.
Figure 7: Status response
GbX_stat
UNIT ID
COLUMNS 1-11
COLUMN 24
COLUMN 36
COLUMN 47
COLUMN 72
COLUMN 60
COLUMN 83
COLUMN 88
COLUMN 95
COLUMN 102
COLUMN 104
Courier New, Reg. :
to outline

16 Summit GbX Installation and User Guide
Troubleshooting the SummitGbX
TROUBLESHOOTING THE SUMMITGbX
This section describes troubleshooting procedures for the SummitGbX:
•Cleaning the optical connector
•Troubleshooting the link
•Loopback troubleshooting
OPTICAL CONNECTOR CLEANING
Connecting damaged or dirty optical fibers to the SummitGbX will damage the
connectors and the internal optics.
The following steps describe the procedure for cleaning an optical connector, shown in
Figure 8.
Table 7: Status Field Descriptions
Column
Location Field Text Description Status Column
1-11 User Defined SummitGbX ID NA
13-15 GBE Gigabit Ethernet Interface NA
17-24 RX FLT RX fault (low optical input power) 24
26-36 SYNC LOSS Sync loss (clock recovery failure) 36
38-47 LOOPBACK Loopback enabled 47
49-51 LDI Long distance interface NA
53-60 RX FLT RX fault (low optical input power) 60
62-72 SYNC LOSS Sync loss (clock recovery failure) 72
74-83 LOOPBACK Loopback enabled 83
85-88 TF Temperature fault, chassis 88
90-95 PS1F Power supply 1 fault 95
97-102 PS2F Power supply 2 fault 102
104-xx Variable Comment field NA
END <LF><CR> Message terminator NA

Summit GbX Installation and User Guide 17
Troubleshooting the SummitGbX
1Using filtered, compressed air, blow any dust out of the female connector mounted
on the SummitGbx.
2Wipe the tip and sheath of the optical fiber cable (located on the cable connector)
with an optical swab that is moistened with optical grade isopropyl alcohol.
3Wipe the tip and sheath of the optical fiber cable (located on the cable connector)
with a dry optical swab.
4Blow dry with filtered, compressed air.
Figure 8: Optical connectors
Listed below are the suggested cleaning materials and sources:
•Compressed gas aerosol can, such as Chemtronics, Inc. (800-645-5244,
www.chemtronics.com) product: 70 PSI
•Lint free swab, such as The Texwipe Company (Upper Saddle River, N.J. 07458)
product: Micro Absorbond Swab TX759B
•Optical grade isopropyl alcohol
Do not use rubbing alcohol. It contains 30% water.
LINK TROUBLESHOOTING
Follow these steps to help detect a link problem:
1Clean the optical connectors, as described in the previous section.
2Make sure that the connectors are plugged in correctly on both ends of the link.
3Verify that the RX FLT LEDs (GBE and LDI) on the SummitGbX chassis are green on
both ends of the link. An RX fault can be caused by incorrectly connected fibers (for
example, TX-to-TX,) dirty or damaged connectors, or damaged fiber.
GbX_OCC
Optical connector
on SummitGbX Optical fiber
cable tip
Optical connector
on cable end

18 Summit GbX Installation and User Guide
Troubleshooting the SummitGbX
4Using an optical power meter, select the appropriate wavelength (780, 1310,
1550 nm) and measure the input power at the ports. Power levels should be above
the minimum specified in Table 3. Optical levels should operate about 3dBm greater
than minimum levels to provide extra link margin.
5Check the color of SYNC LOSS LEDs. If one of the SYNC LOSS LEDs is yellow, the
Clock/Data Recovery (CDR) was unsuccessful in retiming the data at that input
port. This can be caused by incorrect data rate (for example, 10/100 Mbps), poor
signal quality (excessive jitter), or by a component failure.
6Follow the loopback troubleshooting procedure, described in the next section.
Never look directly into an optical connector, or through optical instruments or
lenses, to detect presence of light.
LOOPBACK TROUBLESHOOTING
The purpose of the loopback troubleshooting procedure is to loopback data at various
stages of the link, in order to isolate fault problems. Loopback can be performed
electrically within the SummitGbX, and optically between SummitGbXs. Both methods
are described in this procedure. By examining the hardware included or excluded with
each step, the fault can be isolated to a single piece of equipment or fiber.
The following steps describe the loopback procedure for the SummitGbx, starting on the
end of the link near you. The entire procedure can also be reversed, to start with the
SummitGbX on the remote end of the link. Clean optical connectors before every
connection.
Use one of these methods to verify the outcome of loopback troubleshooting steps:
•The terminal screen, if you are using a serial connection.
•The GUI, if you are using the GUI software.
•The front panel LEDs of the SummitGbX.
1Using multimode fiber jumper(s), connect the Host’s GBE TX and RX ports.
2Reconnect the Host’s GBE ports to the SummitGbX GBE port. Verify GBE LoopBack
Enabled status. The GBE Loop Back LED should be yellow.
3Using the management interface, disable GBE Loopback. Verify Loopback Disabled
status. The GBE Loop Back LED should be green. Connect the SummitGbX LDI TX
output to its LDI RX input using single mode fiber (an optical in-line attenuator is
required for 80 km version only.) Verify optical power at RX.