NEC IP8800/S2400 Series User manual

Thoroughly read and store this manual.
• Read and thoroughly understand safety-related explanations before using this product.
• Keep this manual in a location close at hand for easy reference.
IP8800/S6700, IP8800/S6600, IP8800/S6300, IP8800/S3600,
IP8800/S2400
Troubleshooting Guide
IP88S36-T001-000

■Applicable products
This manual describes models IP8800/S6700, IP8800/S6600, IP8800/S6300, IP8800/S3600, and IP8800/S2400 series.
■Caution when exporting
The necessary procedures are to be adopted when exporting this product after first confirming the regulations of the Foreign Exchange and
Foreign Trade Law, U.S. export control related regulations, etc.
If any questions remains, please consult with our sales department.
■Trademarks
Cisco is a registered trademark of U.S. Cisco Systems, Inc. in the U.S. and other countries.
Ethernet is a product name of Xerox Corp. in the U.S.
GSRP is a registered trademark of ALAXALA Networks Corporation.
Internet Explorer is a trademark or registered trademark of Microsoft Corporation in the U.S. and other countries.
IPX is a trademark of Novell, Inc.
Microsoft is a registered trademark of Microsoft Corp. in the U.S. and other countries.
RSA and RSA SecurID are trademarks or registered trademarks of RSA Security Inc. in the U.S. and other countries.
sFlow is a registered trademark of InMon Corp. in the U.S. and other countries.
UNIX is a registered trademark in the U.S. and other countries exclusively licensed by X/Open Company Limited.
VitalQIP and VitalQIP Registration Manager are trademarks of Lucent Technologies.
VLANaccessClient is a trademark of NEC Software.
Windows is a registered trademark of Microsoft Corp. in the U.S. and other countries.
Other company names and product names are trademarks or registered trademarks of their respective companies.
■Thoroughly read and store this manual
Read and thoroughly understand safety-related explanations before using this product.
Keep this manual in a location close at hand for easy reference.
■Note
The contents of this manual may be modified at any time for improvement without notice.
Note that output display examples and figures may be different from the actual states.
Issue date
November, 2009 (1st Edition) IP88S36-T001-000
■Copyright
Copyright (c) 2009, NEC Corporation, All rights reserved.

I
Introduction
■Applicable product
This manual describes models IP8800/S6700, IP8800/S6600, IP8800/S6300, IP8800/S3600 and IP8800/S2400.
Please read the manual carefully and thoroughly understand the instructions and cautions contained herein before operating the
device. Keep the manual in a location close at hand for easy reference when necessary.
Unless otherwise specified, this manual describes functions common to the models. The mark below refers to functions specific
to respective models.
[IP8800/S6700]:
The description is applicable to IP8800/S6700.
[IP8800/S6600]:
The description is applicable to IP8800/S6600.
[IP8800/S6300]:
The description is applicable to IP8800/S6300.
[IP8800/S3600]:
The description is applicable to IP8800/S3600.
[IP8800/S2400]:
The description is applicable to IP8800/S2400.
If more than one mark is indicated such as [IP8800/S3600] [IP8800/S2400], the function is only supported by those two
models or the description is not applicable to other models.
The mark below refers to functions supported by option licenses.
[OP-NPAR]:
The description is applicable to option license OP-NPAR.
[OP-OPT]:
The description is applicable to option license OP-OTP.
[OP-VAA]:
The description is applicable to option license OP-VAA.
■Correction of this manual
Contents in this manual may be corrected in the "Release note" or "manual correction document" provided with software.
■Intended users
This manual has been written for system managers who develop and operate network systems using IP8800/S6700, IP8800/
S6600, IP8800/S6300, IP8800/S3600, or IP8800/S2400.
In addition, an understanding of the following is assumed.
•Basic knowledge of network system management
■Manual referred to
Manuals to be referenced according to the flow of tasks from installation and setup to daily operations are indicated below.

Introduction
II
For IP8800/S6700, IP8800/S6600, and IP8800/S6300
Procedures from unpacking the product
to making basic settings at the initial
installation
IP8800/S6700
Quick Start Guide (IP88S67-Q001)
IP8800/S6600
Quick Start Guide (IP88S66-Q001)
IP8800/S6300
Quick Start Guide (IP88S63-Q001)
Information on the facility requirement of
the hardware
IP8800/S6700
Hardware lnstallation Guide (IP88S67-H001)
Information on handling of the hardware IP8800/S6600
Hardware lnstallation Guide (IP88S66-H001)
IP8800/S6300
Hardware lnstallation Guide (IP88S63-H001)
Information on software functions,
configuration, and confirmation by using
operation commands
IP8800/S6300 Software Manual
Configuration Settings, Vol.1 (IP88S63-S001)
IP8800/S6300 Software Manual
Configuration Settings, Vol.2 (IP88S63-S002)
IP8800/S6300 Software Manual
Configuration Settings, Vol.3 (IP88S63-S003)
Syntax and parameter details of
configuration commands
IP8800/S6300 Software Manual
Configuration Commands, Vol.1 (IP88S63-S004)
IP8800/S6300 Software Manual
Configuration Commands, Vol.2 (IP88S63-S005)
Syntax and parameter details of
operation commands
IP8800/S6300 Software Manual
Operation Commands, Vol.1 (IP88S63-S006)
IP8800/S6300 Software Manual
Operation Commands, Vol.2 (IP88S63-S007)
Details of operation messages and logs IP8800/S6300 Software Manual
Message Log Reference (IP88S63-S008)
Details of supported MIBs IP8800/S6300 Software Manual
MIB Reference (IP88S63-S009)
lnformation on troubleshooting IP8800/S6700, IP8800/S6600, IP8800/S6300,
IP8800/S3600, IP8800/S2400
Troubleshooting Guide (IP88S36-T001)

Introduction
III
For IP8800/S3600
Procedures from unpacking the product
to making basic settings at the initial
installation
IP8800/S3600, IP8800/S2400
Quick Start Guide (IP88S36-Q001)
Information on the facility requirement of
the hardware
IP8800/S3600, IP8800/S2400
Hardware lnstallation Guide (IP88S36-H001)
Information on handling of the hardware
Information on software functions,
configuration, and confirmation by using
operation commands
IP8800/S3600 Software Manual
Configuration Settings, Vol.1 (IP88S36-S001)
IP8800/S3600 Software Manual
Configuration Settings, Vol.2 (IP88S36-S002)
IP8800/S3600 Software Manual
Configuration Settings, Vol.3 (IP88S36-S003)
Syntax and parameter details of
configuration commands
IP8800/S3600 Software Manual
Configuration Commands, Vol.1 (IP88S36-S004)
IP8800/S3600 Software Manual
Configuration Commands, Vol.2 (IP88S36-S005)
Syntax and parameter details of
operation commands
IP8800/S3600 Software Manual
Operation Commands, Vol.1 (IP88S36-S006)
IP8800/S3600 Software Manual
Operation Commands, Vol.2 (IP88S36-S007)
Details of operation messages and logs IP8800/S3600 Software Manual
Message Log Reference (IP88S36-S008)
Details of supported MIBs IP8800/S3600 Software Manual
MIB Reference (IP88S36-S009)
lnformation on troubleshooting IP8800/S6700, IP8800/S6600, IP8800/S6300,
IP8800/S3600, IP8800/S2400
Troubleshooting Guide (IP88S36-T001)

Introduction
IV
For IP8800/S2400
■Conventions: abbreviations
AC Alternating Current
ACK ACKnowledge
ADSL Asymmetric Digital Subscriber Line
ALG Application Level Gateway
ANSI American National Standards Institute
ARP Address Resolution Protocol
AS Autonomous System
AUX Auxiliary
BCU Basic Control Unit
BGP Border Gateway Protocol
BGP4 Border Gateway Protocol - version 4
BGP4+ Multiprotocol Extensions for Border Gateway
Protocol - version 4
bit/s bits per second *Usually, abbreviated as bps.
BPDU Bridge Protocol Data Unit
BRI Basic Rate Interface
BSU Basic Switching Unit
CC Continuity Check
CDP Cisco Discovery Protocol
CFM Connectivity Fault Management
CIDR Classless Inter-Domain Routing
Procedures from unpacking the product
to making basic settings at the initial
installation
IP8800/S3600, IP8800/S2400
Quick Start Guide (IP88S36-Q001)
Information on the facility requirement of
the hardware
IP8800/S3600, IP8800/S2400
Hardware Installation Guide (IP88S36-H001)
Information on handling of the hardware
Information on software functions,
configuration, and confirmation by using
operation commands
IP8800/S2400 Software Manual
Configuration Settings, Vol.1 (IP88S24-S001)
IP8800/S2400 Software Manual
Configuration Settings, Vol.2 (IP88S24-S002)
Syntax and parameter details of
configuration commands
IP8800/S2400 Software Manual
Configuration Commands (IP88S24-S003)
Syntax and parameter details of
operation commands
IP8800/S2400 Software Manual
Operation Commands (IP88S24-S004)
Details of operation messages and logs IP8800/S2400 Software Manual
Message Log Reference (IP88S24-S005)
Details of supported MIBs IP8800/S2400 Software Manual
MIB Reference (IP88S24-S006)
Information on troubleshooting IP8800/S6700, IP8800/S6600, IP8800/S6300,
IP8800/S3600, IP8800/S2400
Troubleshooting Guide (IP88S36-T001)

Introduction
V
CIR Committed Information Rate
CIST Common and Internal Spanning Tree
CLNP ConnectionLess Network Protocol
CLNS ConnectionLess Network System
CONS Connection Oriented Network System
CRC Cyclic Redundancy Check
CSMA/CD Carrier Sense Multiple Access with Collision
Detection
CSNP Complete Sequence Numbers PDU
CST Common Spanning Tree
CSU Control and Switching Unit
DA Destination Address
DC Direct Current
DCE Data Circuit terminating Equipment
DHCP Dynamic Host Configuration Protocol
DIS Draft International Standard/Designated
Intermediate System
DNS Domain Name System
DR Designated Router
DSAP Destination Service Access Point
DSCP Differentiated Services Code Point
DTE Data Terminal Equipment
DVMRP Distance Vector Multicast Routing Protocol
E-Mail Electronic Mail
EAP Extensible Authentication Protocol
EAPOL EAP Over LAN
EFM Ethernet in the First Mile
ES End System
FAN Fan Unit
FCS Frame Check Sequence
FDB Filtering DataBase
FQDN Fully Qualified Domain Name
FTTH Fiber To The Home
GBIC GigaBit Interface Converter
GSRP Gigabit Switch Redundancy Protocol
HMAC Keyed-Hashing for Message Authentication
IANA Internet Assigned Numbers Authority
ICMP Internet Control Message Protocol
ICMPv6 Internet Control Message Protocol version 6
ID Identifier
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics
Engineers, Inc.
IETF the Internet Engineering Task Force
IGMP Internet Group Management Protocol
IP Internet Protocol
IPCP IP Control Protocol
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
IPV6CP IP Version 6 Control Protocol
IPX Internetwork Packet Exchange
ISO International Organization for Standardization
ISP Internet Service Provider
IST Internal Spanning Tree
L2LD Layer 2 Loop Detection
LAN Local Area Network
LCP Link Control Protocol
LED Light Emitting Diode
LLC Logical Link Control
LLDP Link Layer Discovery Protocol
LLPQ Low Latency Priority Queueing
LLQ+3WFQ Low Latency Queueing + 3 Weighted Fair Queueing
LLRLQ Low Latency Rate Limited Queueing
LSP Label Switched Path
LSP Link State PDU
LSR Label Switched Router
MA Maintenance Association
MAC Media Access Control
MC Memory Card
MD5 Message Digest 5
MDI Medium Dependent Interface
MDI-X Medium Dependent Interface crossover
MEP Maintenance association End Point
MIB Management Information Base

Introduction
VI
MIP Maintenance domain Intermediate Point
MRU Maximum Receive Unit
MSTI Multiple Spanning Tree Instance
MSTP Multiple Spanning Tree Protocol
MSU Management and Switching Unit
MTU Maximum Transfer Unit
NAK Not AcKnowledge
NAS Network Access Server
NAT Network Address Translation
NCP Network Control Protocol
NDP Neighbor Discovery Protocol
NET Network Entity Title
NIF Network Interface
NLA ID Next-Level Aggregation Identifier
NPDU Network Protocol Data Unit
NSAP Network Service Access Point
NSSA Not So Stubby Area
NTP Network Time Protocol
OADP Octpower Auto Discovery Protocol
OAM Operations,Administration,and Maintenance
OSPF Open Shortest Path First
OUI Organizationally Unique Identifier
PAD PADding
PAE Port Access Entity
PC Personal Computer
PCI Protocol Control Information
PDU Protocol Data Unit
PICS Protocol Implementation Conformance Statement
PID Protocol IDentifier
PIM Protocol Independent Multicast
PIM-DM Protocol Independent Multicast-Dense Mode
PIM-SM Protocol Independent Multicast-Sparse Mode
PIM-SSM Protocol Independent Multicast-Source Specific
Multicast
PoE Power over Ethernet
PRI Primary Rate Interface
PS Power Supply
PSNP Partial Sequence Numbers PDU
PSP Packet Switching Processor
QoS Quality of Service
RA Router Advertisement
RADIUS Remote Authentication Dial In User Service
RDI Remote Defect Indication
REJ REJect
RFC Request For Comments
RGQ Rate Guaranteed Queueing
RIP Routing Information Protocol
RIPng Routing Information Protocol next generation
RMON Remote Network Monitoring MIB
RPF Reverse Path Forwarding
RQ ReQuest
RSTP Rapid Spanning Tree Protocol
SA Source Address
SD Secure Digital
SDH Synchronous Digital Hierarchy
SDU Service Data Unit
SEL NSAP SELector
SFD Start Frame Delimiter
SFP Small Form factor Pluggable
SMTP Simple Mail Transfer Protocol
SNAP Sub-Network Access Protocol
SNMP Simple Network Management Protocol
SNP Sequence Numbers PDU
SNPA Subnetwork Point of Attachment
SOP System Operational Panel
SPF Shortest Path First
SSAP Source Service Access Point
STP Spanning Tree Protocol
TA Terminal Adapter
TACACS+ Terminal Access Controller Access Control System
Plus
TCP/IP Transmission Control Protocol/Internet Protocol
TLA ID Top-Level Aggregation Identifier
TLV Type, Length, and Value

Introduction
VII
TOS Type Of Service
TPID Tag Protocol Identifier
TTL Time To Live
UDLD Uni-Directional Link Detection
UDP User Datagram Protocol
UPC Usage Parameter Control
UPC-RED Usage Parameter Control - Random Early Detection
uRPF unicast Reverse Path Forwarding
VAA VLAN Access Agent
VLAN Virtual LAN
VPN Virtual Private Network
VRF Virtual Routing and Forwarding/Virtual Routing
and Forwarding Instance
VRRP Virtual Router Redundancy Protocol
WAN Wide Area Network
WDM Wavelength Division Multiplexing
WFQ Weighted Fair Queueing
WGQ Weighted Guaranteed Queueing
WRED Weighted Random Early Detection
WS Work Station
WWW World-Wide Web
XFP 10 gigabit small Form factor Pluggable
■Conventions: kB, MB, GB, and TB
1 kB(kilobytes), 1 MB(megabytes), 1 GB(gigabytes), and 1 TB(terabytes) indicate 1024 bytes, 10242 bytes, 10243 bytes, and
10244 bytes respectively.

i
Contents
Introduction I
Safety Guide [IP8800/S6700] v
Safety Guide [IP8800/S6600] xvii
Safety Guide [IP8800/S6300] xxix
Safety Guide [IP8800/S3600] [IP8800/S2400] xli
1Overview 1
1.1 Failure Analysis Overview 2
1.2 System and Partial Failure Analysis Overview 3
1.2.1 Failure Analysis for IP8800/S6700, IP8800/S6600, and IP8800/S6300 3
1.2.2 Failure Analysis for IP8800/S3600 and IP8800/S2400 4
1.3 Functional Failure Analysis Overview 7
2Troubleshooting System Failures 11
2.1 Troubleshooting for IP8800/S6700, IP8800/S6600, and IP8800/S6300 12
2.1.1 Troubleshooting Procedure on System Failures 12
2.1.2 Replacement Method of Optional Components 14
2.2 Troubleshooting for IP8800/S3600 and IP8800/S2400 15
2.2.1 Troubleshooting Procedure on System Failures 15
2.2.2 Isolating Failures on External Power Unit 17
2.2.3 Replacement Method of System and Optional Components 18
3Troubleshooting Functional Failures in Operation 19
3.1 Problems on Login Password 21
3.1.1 Forgot the Login User Password 21
3.1.2 Forgot the System Administrator Password 21
3.2 Problems on MC 22
3.2.1 "MC:--------" is displayed by entering the show system command or the show mc command 22
3.2.2 "MC not found" is displayed when MC is accessed 22
3.3 Problems on Operation Terminal 23
3.3.1 Unable to Input/Display from the Console Correctly 23
3.3.2 Login from the Remote Operation Terminal Is Failed 24
3.3.3 Login Authentication Using RADIUS/TACACS+ Is Disabled 25
3.3.4 Command Authorization Using RADIUS/TACACS+ Is Disabled 25

Contents
ii
3.4 Network Interface Communication Failure 27
3.4.1 Ethernet Port Cannot Be Connected 27
3.4.2 Communication Failure in Basic Switching Unit BSU/PSP 29
3.4.3 Actions against Troubles on 10BASE-T/100BASE-TX/1000BASE-T 30
3.4.4 Actions against Troubles on 1000BASE-X 32
3.4.5 Actions against Troubles on 10GBASE-R 33
3.4.6 Communication Failure on Using PoE 35
3.4.7 Communication Failure on Using Link Aggregation 36
3.5 Layer 2 Network Communication Failure 38
3.5.1 Layer 2 Communication by VLAN Is Disabled 38
3.5.2 Failures on Using Spanning Tree 40
3.5.3 Failures on Using Ring Protocol 41
3.5.4 Multicast Relay by IGMP snooping Is Disabled 44
3.5.5 Multicast Relay by MLD snooping Is Disabled 47
3.6 IPv4 Network Communication Failure 50
3.6.1 Communication Is Disabled or Is Disconnected 50
3.6.2 IP Addresses Cannot Be Assigned Using DHCP Function 54
3.6.3 DynamicDNS Cooperation in DHCP Function Is Disabled 58
3.7 IPv4 Unicast Routing Communication Failure 61
3.7.1 No RIP Routing Information Exists 61
3.7.2 No OSPF Routing Information Exists 61
3.7.3 No BGP4 Routing Information Exists 62
3.7.4 No Routing Information Exist [OP-NPAR] 62
3.8 IPv4 Multicast Routing Communication Failure 63
3.8.1 Communication on IPv4 PIM-SM Network Is Disabled 63
3.8.2 Multicast Data Is Double-relayed on IPv4 PIM-SM Network 66
3.8.3 Communication on IPv4 PIM-SSM Network Is Disabled 67
3.8.4 Multicast Data Is Double-relayed on IPv4 PIM-SSM Network 69
3.8.5 IPv4 Multicast Communication Failure In VRF [OP-NPAR] 70
3.9 IPv6 Network Communication Failure 71
3.9.1 Communication Is Disabled or Is Disconnected 71
3.9.2 IPv6 DHCP Troubleshooting 73
3.10 IPv6 Unicast Routing Communication Failure 79
3.10.1 No RIPng Routing Information Exists 79
3.10.2 No OSPFv3 Routing Information Exists 79
3.10.3 No BGP4+ Routing Information Exists 80
3.11 IPv6 Multicast Routing Communication Failure 81
3.11.1 Communication on IPv6 PIM-SM Network Is Disabled 81
3.11.2 Multicast Data Is Double-relayed on IPv6 PIM-SM Network 84
3.11.3 Communication on IPv6 PIM-SSM Network Is Disabled 85
3.11.4 Multicast Data Is Double-relayed on IPv6 PIM-SSM Network 87
3.12 Layer 2 Authentication Communication Failure 89
3.12.1 Communication Failure on Using IEEE 802.1X 89
3.12.2 Communication Failure on Using Web Authentication 92
3.12.3 Communication Failure on Using MAC Authentication 97
3.12.4 Communication Failure on Using Authentication VLAN [OP-VAA] 99

Contents
iii
3.13 Communication Failure on High-reliability Function 103
3.13.1 GSRP Communication Failures 103
3.13.2 Communication with VRRP Configuration in IPv4 Network Is Disabled 105
3.13.3 Communication with VRRP Configuration in IPv6 Network Is Disabled 107
3.14 SNMP Communication Failure 110
3.14.1 MIBs Cannot Be Obtained from SNMP Manager 110
3.14.2 Traps Cannot Be Received by SNMP Manager 110
3.15 Troubleshooting of sFlow Statistics (Flow Statistics) Function 112
3.15.1 sFlow Packets Do Not Reach Collector 112
3.15.2 Flow Sample Does Not Reach Collector 115
3.15.3 Counter Sample Does Not Reach Collector 115
3.16 Communication Failures on Neighboring System Managing Function 116
3.16.1 Unable to Obtain Neighboring System Information via LLDP Function 116
3.16.2 Unable to Obtain Neighboring System Information via OADP Function 116
3.17 NTP Communication Failure 118
3.17.1 Time Synchronization by NTP Is Disabled 118
3.18 Communication Failure on IEEE802.3ah/UDLD Function 119
3.18.1 Port Becomes Inactive Due to IEEE802.3ah/UDLD Function 119
3.19 Problems on Redundant Configuration of Basic Control Unit (BCU)/Control and Switching Unit (CSU)/
Management and Switching Unit (MSU) [IP8800/S6700] [IP8800/S6600] [IP8800/S6300] 120
3.19.1 Active System Switchover Is Disabled 120
3.20 Problems on Redundant Configuration of Basic Switching Unit (BSU) [IP8800/S6700] 121
3.20.1 Active BSU Switchover Is Disabled 121
3.21 Problems on Power Saving Feature 123
3.21.1 Schedule Is Disabled [IP8800/S6700] [IP8800/S6600] 123
3.22 Congestion Caused by Packets Processed Through CPU Is Not Recovered 124
3.23 Communication Failure Caused by Settings of Filtering/QoS 126
3.23.1 Checking Filtering/QoS Setting Information 126
4Troubleshooting Communication Failures Due to Resource Shortage [IP8800/S6700]
[IP8800/S6600] [IP8800/S6300] 129
4.1 MAC Address Table Resource Shortage 130
4.1.1 Checking Resource Usage of MAC Address Table 130
4.1.2 Action to Be Taken When MAC Address Table Resource Shortage Occurs 130
4.2 When Resource Shortage of VLAN Identification Table Occurs 133
4.2.1 Checking VLAN Identification Table Resource Usage 133
4.2.2 Action to Be Taken When VLAN Identification Table Resource Shortage Occurs 133
4.3 When Resource Shortage Occurs in Shared Memory 135
4.3.1 Checking Resource Usage of Shared Memory 135
4.3.2 Action to Be Taken When Resource Shortage of Shared Memory Occurs 135
5Collecting Failure Information 137
5.1 Collecting Failure Information 138
5.1.1 Collecting Failure Information Using ftp Command from the Operation Terminal 138

Contents
iv
5.1.2 Collecting Failure Information Using dump Command [IP8800/S6700] [IP8800/S6600]
[IP8800/S6300] 140
5.2 Transferring Files for Maintenance Information 144
5.2.1 Transferring Files Using ftp Command 145
5.2.2 Transferring Files Using zmodem Command [IP8800/S3600] [IP8800/S2400] 148
5.2.3 Transferring Maintenance Information Files Using show tech-support Command 148
5.2.4 Transferring Files Using ftp Command from the Operation Terminal 150
5.3 Writing to MC 152
5.3.1 Writing File to MC Using Operation Terminal 152
6Line Test 153
6.1 Testing Line 154
6.1.1 Ethernet Port 154
7Restarting the System 159
7.1 Restarting the System 160
7.1.1 Restarting the System 160
Appendix 165
Appendix A Contents of show tech-support Command Display 166
Appnedix A.1 Contents of show tech-support Command Display 166
Index 187

v
Safety Guide [IP8800/S6700]
■Safety guide for the IP8800/S6700 series
• This document provides safety-related notices for use of the IP8800/S6700 series. To utilize the functions
of this device, read this document completely and carefully before using the device.
• Keep this document at hand after you read it, so that you can always refer it later.
• For any operation, follow the directions and procedures given by this document.
• Observe the cautions labeled on the device or those presented by this document. If you fail to do so, you
will cause damage to yourself or the device.
■Symbols
• We have various symbols displayed on the IP8800/S6700 series and in the manuals to guide you in using
the IP8800/S6700 series correctly and safely without injuring yourself and others, or damaging equipment
assets. Below are the symbols and their meanings. Fully understand the description and then proceed with
reading the main part of the manual.
■Operations and actions
• Do not attempt to perform any operations not specifically described in this document.
In case of a problem on the device, contact the maintenance personnel after performing the following.
•For the device with AC power supply mounted, power off the device and unplug the power cable from the outlet.
•For the device with DC power supply mounted, power off the device and turn off the breaker in the power supply
equipment.
■Be careful in operation
• The instructions shown on the device or in this manual are the results of our thorough consideration.
However, an unexpected situation may occur. For operations, not only follow the instructions but also
always be careful with your judge.
WARNING If you ignore instructions preceded by this symbol, you could cause personal injury or
death to yourself and others.
CAUTION If you ignore instructions preceded by this symbol, you could cause personal injury to
yourself and others, or serious damage to the device or surroundings.
CAUTION If you ignore instructions preceded by this symbol, you could cause physical damage
to the device or surroundings.
NOTE A note is informational in nature. Unlike warning and caution notices, notes (for
prevention of malfunction, prevention of product minor damages) are not related to the
physical injury or damage to the device.

Safety Guide [IP8800/S6700]
vi
■In case a failure should occur, power off the device immediately.
• In case fume or unusual odor should occur, or foreign matters should come into the device, power off the
device as follows. If the device is used in a faulty state, fire disasters or electric shock may be caused.
• For the device with AC power supply mounted, power off the device and unplug the power cable from the
outlet.
• For the device with DC power supply mounted, power off the device and turn off the breaker in the power
supply equipment because the power cable is connected via a terminal.
■Do not place the device in an unstable location.
• If the device is being placed on a table, be sure to install it horizontally on a workbench or the like that can
sufficiently bear the weight of the device. If the device is placed on an unstable location such on a shaky
table or slope, the device may fall and drop and consequently personal injury may occur.
■Do not remove the device cover.
• Do not remove the device cover. Electric shock may be caused.
■Do not put foreign matters in the device.
• Do not insert or drop metals or combustibles into the device through the intake/exhaust port. Fire disasters
or electric shock may be caused.
■Modification is not permissible.
• Device modification is not permissible. Fire disasters or electric shock may be caused.
■Do not give a shock.
• In case the device is dropped or parts are damaged, power off the device, pull the cable out of the outlet,
and call the maintenance engineer. Otherwise it can cause a fire or electric shock.
■Do not put any material on the device.
• Do not put a metal such as pin or clip or a container with water in it such as vase or flower pot on the device.
Fire disasters or electric shock may be caused.
■Do not use power not specified.
• Do not use a supply voltage not specified. Fire disasters or electric shock may be caused.
■The current capacity supplied to the power distribution panel must be larger than the
operating current of the breaker.
• The current capacity supplied to the power distribution panel must be larger than the operating current of
the breaker. Otherwise, the breaker may not work in the event of a failure and cause fire disasters.
WARNING

Safety Guide [IP8800/S6700]
vii
■Grounding is required.
• When the device is connected to the power supply of 100VAC, leak current of up to 3.5mA flows for each
device. Be sure to use the grounded outlet. If the power supply is used without grounding, an electric shock
may be caused and failures may occur due to electric noise.
• When the device is connected to the power supply of 200VAC, leak current of up to 5mA flows for each
device. Choose a grounded outlet and make sure that the outlet is grounded to a ground plate in the
building. Request the maintenance personnel or specialized installation workers to check the grounding. If
the power supply is used without grounding, an electric shock may be caused and failures may occur due
to electric noise. The label below is attached to the device.
• When the device is connected to the DC power supply, be sure to connect the grounding terminal. If the
power supply is used without grounding, an electric shock may be caused and failures may occur due to
electric noise.
■Installing/uninstalling of the DC power cable must be performed by the trained
engineer or maintenance personnel.
• Installing/uninstalling of the DC power cable must be performed by the trained engineer or maintenance
personnel. DC power cable is connected to the power supply via a terminal. Therefore, inadvertent
handling of the DC power cable may result in fire disasters or electric shock.
■Before installing or removing a DC power cable, turn off the breaker on power supply
facilities.
• Before installing or removing a DC power cable, turn off the breaker on power supply facilities. Operation
with the breaker on may cause electric shock.
■Attach insulation covers on the 0V and -48V terminals of a DC power cable.
• Attach insulation covers on the 0V and -48V terminals of a DC power cable (the side of which connects to
power supply facilities). Operation without insulation covers may cause electric shock.
■When using the DC power supply, do not leave the terminal board uncovered.
• When using the DC power supply, be sure to attach the cover to the terminal board after connecting the
power cable. Operating it without the terminal board cover can cause an electric shock.
■Do not touch the potential tap.
• The power supply is provided with the potential tap. This tap is used for inspection at shipment. Customer
should not use this tap. Do not insert a sharp material such as pin or clip into the potential tap. Fire disasters
or electric shock may be caused.

Safety Guide [IP8800/S6700]
viii
■The device must be carried and installed by the trained personnel or specialized
carrier.
• The weight of the device is 82 kg/182 lb at the maximum. The device must be carried and installed by the
trained personnel or specialized carrier. Otherwise, a personal injury due to drop or fall may be caused.
For installation and carrying of the device, use a handling equipment such as a hand lifter. Otherwise, a
personal injury due to drop or fall may be caused. The label below is attached to the device.
■Handle the power cable with caution.
• Do not put a heavy material on the power cable or do not pull, bend, or modify the power cable. The power
cable will be damaged and fire disasters or electric shock may be caused. A heavy material may be placed
as a result of covering the cable with a floor carpet.
• Use the attached power cable or the power cable complying with the specifications. If any other cable is
used, fire disasters or electric shock may be caused. Do not use the attached power cable for other
purposes. In such a case, fire disasters or electric shock may be caused.
• If the power cable is degraded (e.g., wire cores exposed or broken), ask the service personnel for
replacement. Otherwise it can cause a fire or electric shock.
• Check to see if dust is deposited on the power plug. Insert the plug securely to the end so that shakiness
will not occur. If dust is deposited or connection is incomplete, fire disasters or electric shock may be
caused.
■Do not plug too many leads into a single outlet.
• Do not plug too many power plugs into a single outlet. Many loads on an electrical outlet may result in fire
disasters and the electric energy in use may be exceeded, the breaker may go off, and other components
may be affected.

Safety Guide [IP8800/S6700]
ix
■Before powering off, turn off all power switches or breakers on the device.
• Multiple input power supplies are provided to the device. Before powering off, turn off all power switches
(when AC power supply is mounted) or breakers (when DC power supply is mounted) on the device. The
label below is attached to the device.
■Work to add or replace equipment must be performed by a trained engineer or
maintenance personnel.
• To add or replace optional components must be performed by a trained engineer or maintenance
personnel. To add or replace a power supply involves to plug and unplug power cables; a person other than
the preceding ones may fail to handle things, which can cause fire disaster, electric shock, and equipment
failure. Other optional components, if handled mistakenly, can also cause fire disaster, wounds, and
equipment failure.
■Do not press the switch on the basic control unit with a fragile tip, pin, or clip that may
get stuck and cannot be removed.
• Do not press the switch on the front panel of the basic control unit with a fragile tip, pin, or clip that may get
stuck and cannot be removed. Fire disasters or electric shock may be caused.
■Before addition or replacement of the power supply, unplug the power cable.
• Remove the power cable from the power supply when adding or replacing it. With the power cable
connected, the power supply equipment may remain energized from some circuits even the power switch
is turned off. Therefore, adding or replacing the power supply with the power cable connected may cause
a fire or electric shock.
■Keep air dusters away from fire.
• If you use an air duster with combustible gas to clean the optical connector, keep away from fire. Otherwise,
fire disaster may occur.

Safety Guide [IP8800/S6700]
x
■Do not install the device in a humid or dusty environment.
• Do not install the device in a humid or dusty environment. Fire disasters or electric shock may be caused.
• Moving the device from a cold place to a warm place may form condensation on the surface or internal of
the device. If the device is operated immediately a fire or electric shock can be caused. Thus, in this case,
leave the device as it is for several hours before starting operation.
■Do not stack the devices.
• Do not stack the devices. The device may be damaged. The device may be damaged or lose its balance
and fall or drop. As a result, personal injury may occur.
■Do not recline on the device, or place a heavy loading on it.
• Do not ride on or cling to the device or do not put a heavy material on it. The device may be damaged. The
device may be damaged or lose its balance and fall or drop. As a result, personal injury may occur.
■When installing the device on the rack, use the guide rail or shelf.
• The rack mounting bracket supplied with this device is used to fasten the device on the rack but not to
support the weight of the device. Be sure to use the guide rail or shelf. The guide rail or shelf must be the
one attached to the rack and capable of supporting the weight of the fully mounted switch.
■Do not block the intake and/or exhaust port.
• Do not block the intake/exhaust port of the device. Blocking the intake/exhaust port keeps heat inside and
fire disasters may be caused. Keep a space of at least 70mm from the intake/exhaust port.
■Do not bring hairs or any foreign matters close to the intake/exhaust port of the
device.
• The cooling fan unit is provided on the device. Do not put any material close to the intake/exhaust port. The
internal temperature rise may result in a failure. Do not put hair or any material close to the intake/exhaust
port. You may be caught and injured.
■When moving an optional component, do not carry it by holding its handle.
• When moving a fan unit or power supply, do not hold its handle. The handle may come off and the device
may drop. As a result, a personal injury may occur. Or the fan unit or power supply may be deformed that
may cause a fire or electric shock.
■Before carrying the device, remove the cables.
• When moving the device, power off the device, remove all the cables from the device, and then move the
device. Otherwise the device or cable may be deformed or damaged. As a result, fire disasters or electric
shock may be caused.
CAUTION