HP L10 User manual

Hewlett-Packard
SureStore E Hub
Models S10 and L10
Service and
User Manual

Hewlett-Packard SureStore E Hub
Models S10 and L10
Service and User Manual
Edition E0899
Order No. A3724-90006
Printed in U.S.A.

2
Notice
© Hewlett-Packard Company, 1997, 1998, 1999.
All rights reserved.
Hewlett-Packard Company makes no warranty of
any kind with regard to this material, including, but
not limited to, the implied warranties of
merchantability and fitness for a particular purpose.
Hewlett-Packard shall not be liable for errors
contained herein or for incidental or consequential
damages in connection with the furnishing,
performance, or use of this material.
This document contains proprietary information,
which is protected by copyright. No part of this
document may be photocopied, reproduced, or
translated into another language without the prior
written consent of Hewlett-Packard. The
information contained in this document is subject to
change without notice.
Warranty
If you have any questions about the warranty for
this product, contact your dealer or local Hewlett-
Packard sales representative.
Trademark Information
HyperTerminal is a registered trademark of
Hilgreave, Inc.
Windows and Windows NT are either a registered
trademark or trademark of Microsoft Corporation in
the United States and/or other countries.
Safety Instructions
Grounding
This product is a safety class I product and has a
protective earthing terminal. There must be an
uninterruptible safety earth ground from the main
power source to the product’s input wiring
terminals, power cord, or supplied power cord set.
Whenever it is likely that the protection has been
impaired, disconnect the power cord until the
ground has been restored.
Service
Any servicing, adjustment, maintenance, or repair
must be performed only by authorized service-
trained personnel.
Format Conventions
Denotes
WARNING A hazard that can cause
personal injury
Caution A hazard that can cause hardware
or software damage
Note Significant concepts or operating
instructions
this font Text to be typed verbatim: all
commands, path names, file
names, and directory names
this font Text displayed on the screen
<ENTER>Keys to be pressed, for example,
the <ENTER> key

3
CONTENTS
Contents
1Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Front Panel, Model S10 Short-Wave Hub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Front Panel, Model L10 Long-Wave Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Rear Panel, Short-Wave and Long-Wave Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Supported Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Single Short-Wave Hub Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Cascaded Short-Wave Hub Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cascaded Long-Wave Hub Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Procedure 1: Prepare to Install the Hub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Procedure 2: Unpack the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Procedure 3: Verify Hub Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Procedure 4: Mount the Hub into a Rack (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . 27
Procedure 5: Plan the FC-AL Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Correct Cabling Example for a Short-Wave Hub . . . . . . . . . . . . . . . . . . . . . . . . . 32
Correct Cabling Example for a Long-Wave Hub . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Incorrect Cabling Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Nonsupported Cabling Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Procedure 6: Connect FC-AL Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Procedure 7: Verify the Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4
For HP-UX servers: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
For HP NetServers: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3RS-232 Interface Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
About the RS-232 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Tips for Using the RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Setting Up an RS-232 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Setting Up a Connection to a PC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Setting Up a Connection to a Dumb Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Updating the Hub Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Procedure 1: Obtain the Current Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Procedure 2: Reboot the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Procedure 3: Update the Hub Controller Firmware . . . . . . . . . . . . . . . . . . . . . . . 50
Procedure 4: Update the Hub Device Agent Code . . . . . . . . . . . . . . . . . . . . . . . . 52
Procedure 5: Reset the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Procedure 6: Set Manufacturing Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Enabling Hub Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Setting Hub IP Address and Network Configuration Options. . . . . . . . . . . . . . . 57
Verifying and Setting SNMP Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Configuring Cascaded Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Running Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Viewing Hub Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

5
Contents
If the Power LED Is Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
If the Hub Fault LED Stays on After Self-Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
If a Fan Is Not Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
If a Device Is Unlisted/UNCLAIMED in ioscan or
Not Displayed in SCSI Adapters Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
If a Port LED Is Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
If a Port LED Is On When It Should Be Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
If the Management Server Cannot Ping the Hub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
If Firmware Upgrade Appears to Fail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Recovering from Failed Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
5Maintenance and Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Replacing the Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
6Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Standard Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Operating Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Software and Operating System Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . 100
Physical and Cabling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Supported Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Supported Distances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Physical Characteristics of Standalone Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

6
Regulatory Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Laser Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

7
FIGURES
Figures
1Front Panel Display, Short-Wave Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2Front Panel Display, Long-Wave Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4Example Topology: 10 Ports Shared among Server and FC-AL Devices . . . . . . . . . . . . .17
5Example Topology: Cascaded Short-Wave Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6Example Topology: Cascaded Long-Wave Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7Standalone Product Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8Replacing Mounting Ear Brackets and Nylon Retainers . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9Installing Rails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10 Installing the Hub into the Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11 Installing the Plenum Shroud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12 Hub Correctly Installed in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
13 Cascaded Short-Wave Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
14 Cascaded Long-Wave Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15 Incorrect Cabling Example: Connected Ports on the Same Hub . . . . . . . . . . . . . . . . . . . 35
16 Incorrect Cabling Example: Disconnected Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
17 Incorrect Cabling Example: More Than One Cable Connection Between Hubs . . . . . . 36
18 Incorrect Cabling Example: Long-Wave Port Connections to Wrong Device/Port . . . . 36
19 Nonsupported Cabling Example: More Than Two Hubs Connected . . . . . . . . . . . . . . .37
20 Nonsupported Cabling Example: HP-UX Server and HP NetServer
Connected to Same Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
21 Removing the Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
22 Replacing the Fan Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

8
23 HP SureStore E Hub, Standalone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
24 HP SureStore E Hub, Factory-Racked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
25 Model S10 or L10 Option 001 Hub Rackmount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
26 HP SureStore E Hub Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

9
TABLES
Tables
1Worksheet for Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
2LED Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3HP SureStore E Hub Product Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
4HP SureStoreE Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
5HP SureStore E Hub Replaceable Parts and Service Part Numbers . . . . . . . . . . . . . . . .98
6Multimode Fiber Optic Cable Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
7Power Cord Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
8Cable Plant Specifications: Single-Mode (2 km–10km, 100MB/sec) . . . . . . . . . . . . . . . 101
9Cable Plant Specifications: 50-Micron Multimode (500m, 100MB/sec)
Non-OFC Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
10 Cable Plant Specifications: 62.5-Micron Multimode (175m, 100MB/sec)
Non-OFC Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
11 Supported Cable Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
12 Environmental Specifications for Model S10 Short-Wave and
Model L10 Long-Wave Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
13 Physical Characteristics of Model S10 Short-Wave and Model L10 Long-Wave Hubs . 108

10

Product Description
11
1PRODUCT DESCRIPTION
Overview
Features
Front Panel, Model S10 Short-Wave Hub
Front Panel, Model L10 Long-Wave Hub
Rear Panel, Short-Wave and Long-Wave Hubs
Supported Topologies

12 Overview
Overview
The Hewlett-Packard SureStore E hub, short-wave model S10 and long-wave model L10, is
a full-duplex, 1063-megabit-per-second hub. It increases loop reliability, number of loop
connections, and distances between server and mass storage devices in a Fibre Channel
Arbitrated Loop. The hub’sport detection and bypass circuitry dynamically detects and
bypasses a failed node on the loop. Nodes can be added, removed, and reconnected
without bringing down the loop and disrupting communication for other nodes.
Fibre Channel Manager is a web-based software application that allows you to remotely
manage and monitor the health of the hub. To learn more about Fibre Channel Manager,
visit the Hewlett-Packard (Software Depot (http://www.software.hp.com). Fibre Channel
Manager is available as a free download from this web site.
Older hubs may require a firmware upgrade to meet Fibre Channel Manager’s minimum
requirements. The Software Depot web site has more information about this. The latest
hub firmware and upgrade instructions are available as a free download from this web site.
Detailed configuration information and part numbers for the hub are provided in chapter6,
Reference.

Features 13
Product Description
Features
HP SureStore E hubs provide the following features:
•Short-wave hub (model S10): 10 non-Open Fibre Control (non-OFC) short-wave
optical transceivers
•Long-wave hub (model L10): nine non-OFC, short-wave optical transceivers and one
non-OFC, long-wave optical transceiver
•Local retime and regeneration of transmit signals to prevent accumulation of jitter and
improve the signal
•Reliable, automatic bypass of failed nodes; dynamic recognition of newly added or
removed nodes, with a controller in each port permitting the bypass of a port if the port
fails signal validity tests
•Active loop reconfiguration when a node to an arbitrated loop is added, removed, or
moved
•Plug-and-play capability, which allows the hub to connect to compatible servers and
other Fibre Channel Arbitrated Loop (FC-AL) devices while they are operating ( FC-AL
devices can be added or removed while the hub is active.)
•Cascade support (hub-to-hub connections) for increased loop distances
Cascaded short-wave hubs are supported up to 500 meters; cascaded long-wave hubs
are supported up to 3000 meters (3 km). Under certain conditions, cascaded long-wave
hubs are supported up to 10,000 meters (10 km) (see page105 for more information).
The 10-km capability only applies to long-wave hubs connected to HP-UX servers.
Note Increased loop distances are associated with increased latency times.
•Access to the RS-232 interface for firmware upgrades and hub configuration and
troubleshooting
•Support for a hub management tool (Fibre Channel Manager) to remotely manage and
monitor the health of the hub

14 Front Panel, Model S10 Short-Wave Hub
Front Panel, Model S10 Short-Wave Hub
The front panel contains LEDs for monitoring power, fault, and port status. The RS-232
port is provided to configure and troubleshoot the hub and to upgrade its firmware. The
10Base-T port provides an ethernet connection if you choose to manage the hub with Fibre
Channel Manager.
The Reset button resets the internal control microprocessor of the hub. Pushing the Reset
button also forces loop initialization on all devices in the loop.
Figure 1 Front Panel Display, Short-Wave Hub
1 Power LED 7 10Base-T port
2 Fault LED 8 10Base-T Status LED
3 Reset button 9 MAC address
4 Fibre Channel connector (Port 1 indicated) 10 RS-232 port
5 Port LED (Port 1 indicated) 11 AC power connector
6 FC-AL short-wave ports and Port LEDs
13
245
6
7
10
11
9
8

Front Panel, Model L10 Long-Wave Hub 15
Product Description
Front Panel, Model L10 Long-Wave Hub
The front panel contains LEDs for monitoring power, fault, and port status. The long-wave
port is between port 9 and the 10Base-T port. The RS-232 port is provided to configure and
troubleshoot the hub and to upgrade its firmware. The 10Base-T port provides an ethernet
connection if you choose to manage the hub with Fibre Channel Manager.
The Reset button resets the internal control microprocessor of the hub. Pushing the Reset
button also forces loop initialization on all devices in the loop.
Figure 2 Front Panel Display, Long-Wave Hub
1 Power LED 7 FC-AL long-wave port and Port LED
2 Fault LED 8 10Base-T port
3 Reset button 9 10Base-T Status LED
4 Fibre Channel connector (Port 1 indicated) 10 MAC address
5 Port LED (Port 1 indicated) 11 RS-232 port
6 FC-AL short-wave ports and Port LEDs 12 AC power connector
1
2
3
4
6
8
10 11
12
5
79

16 Rear Panel, Short-Wave and Long-Wave Hubs
Rear Panel, Short-Wave and Long-Wave Hubs
Three fans, located in a customer-replaceable module at the rear panel, cool the hub. If one
fan fails, the remaining two fans cool the hub temporarily, but it is important to replace the
module as soon as possible (see chapter5, Maintenance and Replacement).
Figure 3 Rear Panel
Caution Although the module will continue to run with two fans, a full complement of
fans ensures system and data integrity.
fan air vents

Supported Topologies 17
Product Description
Supported Topologies
Devices such as FC-AL disk arrays and HP system servers that support FC-AL can be
connected to the hub in a loop that includes one or more servers. All nodes in the loop
must be 1063 Mbps short-wave, non-OFC, FC-AL. The ports connected by a cable must
have the same optical transceivers. Figure4, Figure5, and Figure6 show typical hub
topologies. For details on supported topologies, contact an HP sales representative.
Single Short-Wave Hub Topology
For the model S10 short-wave hub, Hewlett-Packard recommends 50-micron multimode
fiber cable for new installations, but also supports 62.5-micron multimode fiber cable with
SC-style connectors in existing installations. Stated distances assume 50-micron multimode
cable.
A server with an FC-AL short-wave adapter can connect to an hub 500 meters away. Each
of the 10 ports on the short-wave hub can connect to an FC-AL device up to 500 meters
away. The maximum distance between the server and the end FC-AL device is 1000 meters
(1 km).
Figure 4 Example Topology: 10 Ports Shared among Server and FC-AL Devices
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500 m
500 m
FC-AL Devices
HP-UX Server
or HP NetServer
Total distance between server
and FC-AL device = 1000 m
HP-UX Server
or HP NetServer
NOTE: Connecting HP-UX servers
and HP NetServers to the same hub
is NOT a supported configuration.
model S10 hub

18 Supported Topologies
Cascaded Short-Wave Hub Topology
The example in Figure5 shows two model S10 hubs connected in a cascade topology.
Cascaded short-wave hubs use one port on each hub for the hub-to-hub connection. Such a
configuration increases the potential distance between nodes in the loop an additional 500
meters. The maximum distance between the server and FC-AL devices with cascaded
short-wave hubs is 1500 meters (1.5 km).
Figure 5 Example Topology: Cascaded Short-Wave Hubs
Cascaded hubs must have the same firmware versions to operate properly. If you are using
Fibre Channel Manager to manage cascaded hubs, configure the hub that has the LAN
(ethernet) connection as a parent hub and the remaining hub as a child hub (see
Configuring Cascaded Hubs on page60).
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Maximum distance between
FC-AL Devices
HP-UX Server 500 m
500 m 500 m
FC-AL Devices
server and FC-AL device = 1500 m
or
HP NetServer
NOTE: Connecting HP-UX
servers and HP NetServers
to the same hub is NOT
a supported configuration.
model S10 hub model S10 hub