Alaxala AX25S-T001X-60 User manual

AX2500S
Troubleshooting Guide
AX25S-T001X-60

Relevant products
This manual applies to the models of the AX2500S series of switches.
Export restrictions
In the event that any or all ALAXALA products (including technologies, programs and services) described or
contained herein are controlled under any of applicable export control laws and regulations (including the Foreign
Exchange and Foreign Trade Law of Japan and United States export control laws and regulations), such products
shall not be exported without obtaining the required export licenses from the authorities concerned in accordance
with the above laws.
Trademarks
Ethernet is a registered trademark of Xerox Corporation.
Microsoft is either a registered trademark or trademark of Microsoft Corporation in the United States and other
countries.
Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
RSAand RSASecurID are trademarks or registered trademarks of RSASecurity Inc. in the United States and other
countries.
sFlow is a registered trademark of InMon Corporation in the United States and other countries.
Wake-on-LAN is a registered trademark of IBM Corporation.
MagicPacket is a registered trademark of Advanced Micro Devices, Inc.
Other company and product names in this document are trademarks or registered trademarks of their respective
owners.
Reading and storing this manual
Before you use the equipment, carefully read the manual and make sure that you understand all safety precautions.
After reading the manual, keep it in a convenient place for easy reference.
Note
Information in this document is subject to change without notice.
Edition history
September 2012 (Edition 7) AX25S-T001X-60
Copyright
All Rights Reserved, Copyright(C), 2010, 2012, ALAXALA Networks, Corp.

History of Amendments
(Edition 7) Summary of amendments
Location and title Changes
3.11 Troubleshooting the sFlow
statistics (flow statistics) functionality This subsection was added.
Appendix A. Detailed Display
Contents of the show tech-support
Command
Commands were added to the Displayed information.
In addition to the above changes, minor editorial corrections were made.
(Edition 6) Summary of amendments
Location and title Changes
Failures occurring when the Spanning
Tree functionality is used Actions to be taken when the Spanning Tree functionality is used with the Ring Protocol were added.
Failures occurring when the Ring
Protocol functionality is used Actions to be taken when the master node is supported were added.
Actions to be taken when the Spanning Tree functionality is used
with the Ring Protocol were added.
Descriptions of the multi-fault monitoring functionality were
added.
IPv6 network communication failures This subsection was added.
Appendix A. Detailed Display
Contents of the show tech-support
Command
Commands were added to the Displayed information.
In addition to the above changes, minor editorial corrections were made.
(Edition 5) Summary of amendments
Location and title Changes
Appendix A. Detailed Display
Contents of the show tech-support
Command
The layer-2 specified column was added to indicate whether each
command is displayed when the layer-2 parameter is
specified.
In addition to the above changes, minor editorial corrections were made.

(Edition 4) Summary of amendments
Location and title Changes
-- A description of AX2530S-24T4X/AX2530S-48T2X switches was
added.
In addition to the above changes, minor editorial corrections were made.
(Edition 3) Summary of amendments
Location and title Changes
SNMP communication failures A description of SNMPv3 was added.
NTP communication failures A description related to checking of the time zone was changed.
Loop connector loopback test A description of a loop connector when SFP for
10BASE-T/100BASE-TX/1000BASE-T is used was added.
Creating loop connectors This subsection was added.
Detailed display contents of the show
tech-support command Commands were added to the Displayed information.
In addition to the above changes, minor editorial corrections were made.
(Edition 2) Summary of amendments
Location and title Changes
-- A description of AX2530S-24S4X switches was added.
Procedure for handling Switch faults A description of the 10GBASE-R interface was added to Table
2-1.
Information cannot be entered from
the console or does not display
correctly
Items to check when login fails were changed.
Login from a remote terminal is not
possible Items to check when login fails were changed.
Updates by using the ppupdate
operation command are not possible A description related to notes on update files was added.
Restoring data by using the restore
operation command is not possible A description related to notes on backup files was added.
Actions to be taken for 100BASE-FX
[24S4X]/1000BASE-X problems A description of 100BASE-FX was added.

Location and title Changes
Actions to be taken for 10GBASE-R
problems [24S4X] This subsection was added.
Actions to be taken for direct attach
cable problems [24S4X] This subsection was added.
Problems related to the support
regarding long life solutions This subsection was added.
Detailed display contents of the show
tech-support command Commands were added to the Displayed information.
In addition to the above changes, minor editorial corrections were made.

I
Preface
Applicable products and software versions
This manual applies to the models in the AX2500S series of switches. It also describes the
functionality of version 3.4 of the software for theAX2500S series of switches. The
described functionality is that supported by the OS-L2B and the advanced software
upgrade license (the "License").
Before you operate the equipment, carefully read the manual and make sure that you
understand all instructions and cautionary notes.After reading the manual, keep it in a
convenient place for easy reference.
Unless otherwise noted, this manual describes the functionality applicable commonly to
AX2500S series switches. The functionalities specific to each model are indicated as
follows:
[24T]:
This description applies toAX2530S-24T switches.
[24T4X]:
This description applies toAX2530S-24T4X switches.
[48T]:
This description applies toAX2530S-48T switches.
[48T2X]:
This description applies toAX2530S-48T2X switches.
[24S4X]:
This description applies toAX2530S-24S4X switches.
[10G models]:
The description applies to AX2530S-24T4X, AX2530S-48T2X, and
AX2530S-24S4X switches.
Unless otherwise noted, this manual describes the functionality for OS-L2B. Functionality
related to the Software License Agreement and License Sheet is indicated as follows:
[OS-L2A]:
The description indicates functionality supported by the Software License
Agreement and License Sheet.
Corrections to the manual
Corrections to this manualare containedin the Release Notes and Manual Corrections that
might come with the software.
Intended readers
This manual is intended for system administrators who wish to configure and operate a
network system that uses the Switch.
Readers must have an understanding of the following:
The basics of network system management
Manual URL
You can view this manual on our website at:
http://www.alaxala.com/en/

Preface
II
Reading sequence of the manuals
The following shows the manuals you need to consult according to your requirements
determined from the following workflow for installing, setting up, and starting regular
operation of anAX2500S series switch.
Abbreviations used in the manual
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
BGP Border Gateway Protocol
BGP4 Border Gateway Protocol - version 4
BGP4+ Multiprotocol Extensions for Border Gateway Protocol - version 4
bits/s Bits per second (can also appear as bps)

Preface
III
BPDU Bridge Protocol Data Unit
BRI Basic Rate Interface
CC Continuity Check
CDP Cisco Discovery Protocol
CFM Connectivity Fault Management
CIDR Classless Inter-Domain Routing
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
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

Preface
IV
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
LLQ+3WFQ Low Latency Queueing + 3 Weighted Fair 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
MIP Maintenance domain Intermediate Point
MRU Maximum Receive Unit
MSTI Multiple Spanning Tree Instance
MSTP Multiple Spanning Tree Protocol
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
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
packet/s packets per second (can also appear as pps)
PAD PADding

Preface
V
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
QoS Quality of Service
RA Router Advertisement
RADIUS Remote Authentication Dial In User Service
RDI Remote Defect Indication
REJ REJect
RFC Request For Comments
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
SFP+ Enhanced Small Form factor Pluggable
SML Split Multi Link
SMTP Simple Mail Transfer Protocol
SNAP Sub-Network Access Protocol
SNMP Simple Network Management Protocol
SNP Sequence Numbers PDU
SNPA Subnetwork Point of Attachment
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

Preface
VI
TOS Type Of Service
TPID Tag Protocol Identifier
TTL Time To Live
UDLD Uni-Directional Link Detection
UDP User Datagram Protocol
ULR Uplink Redundant
UPC Usage Parameter Control
UPC-RED Usage Parameter Control - Random Early Detection
VAA VLAN Access Agent
VLAN Virtual LAN
VRRP Virtual Router Redundancy Protocol
WAN Wide Area Network
WDM Wavelength Division Multiplexing
WFQ Weighted Fair Queueing
WRED Weighted Random Early Detection
WS Work Station
WWW World-Wide Web
XFP 10 gigabit small Form factor Pluggable
Conventions: The terms "Switch" and "switch"
The term Switch (upper-case "S") is an abbreviation for any or all of the following models:
AX2500S series switch
The term switch (lower-case "s") might refer to a Switch, another type of switch from the
current vendor, or a switch from another vendor. The context decides the meaning.
Conventions: KB, MB, GB, and TB
This manual uses the following conventions:
1 KB (kilobyte) is 1024 bytes.
1 MB (megabyte) is 10242bytes.
1 GB (gigabyte) is 10243bytes.
1 TB (terabyte) is 10244bytes.

Safety-1
Safety Information
Using AX2500S series switches properly and safely
This guide provides important information for ensuring safe use ofAX2500S series
switch. Please read this manual completely before using the Switch.
Keep this manual handy after reading it, so that it is available for later reference.
Operate the Switch according to the instructions and procedures provided in this
manual.
Heed all warnings and cautions for the Switch in this guide. Failure to do so could
result in injury or damage to the Switch.
Before using the Switch
Caution indications
These indications are intended to ensure safe and correct use of the Switch and to
prevent serious injury, and equipment and property damage. Caution information in
this manual and on the Switch is preceded by the indications shown below. Make sure
you fully understand the meaning of the indications before continuing with the main
body of this manual.
Ignoring instructions preceded by this indication and using the Switch incorrectly
could result in death or serious injury to yourself and others.
Ignoring instructions preceded by this indication and using the Switch incorrectly
could result in serious injury to yourself and others.
CAUTION Ignoring instructions preceded by this indication and using the Switch incorrectly
could result in serious damage to the Switch or nearby property.
NOTE Information preceded by this indication is supplementary information that, if
ignored, will not result in physical injury or serious damage to the Switch.
Unauthorized operations
Do not attempt to perform any operations that are not described in this guide.
In the event of a Switch problem, turn off the power, unplug the power cable, and
contact maintenance personnel.
Using common sense
The warnings and cautions provided on the Switch and in this guide have been selected
after careful consideration.
Nevertheless, there is always the possibility of the unexpected occurring. Therefore, while
using a Switch, stay alert and use common sense in addition to all following instructions.

Safety Information
Safety-2
If anything seems wrong, immediately turn off the power.
If smoke or an unusual smell is emanating from the Switch, or ifliquid is spilled into the
Switch or a foreign object falls into the Switch, immediately turn off Switch power as
described below. Continuing operation could result in fire or electric shock.
Actions to take for abnormal conditions
Device in which an error occurred Action to take
Switch When an external power unit
(EPU) is not used Turn off the Switch and unplug the power cable.
When an external power unit
(EPU) is used Turn off the Switch and the power supply module supplying power to the Switch, and then unplug the power cable.
EPU Turn off the EPU, and then unplug the power cable.
Do not allow any foreign objects to get into the Switch.
Do not insert or drop any foreign objects, such as anything metallic or flammable,
through the Switch's ventilation slots. Doing so could result in fire or electric shock.
When pressing the RESET button, do not use anything with a fragile tip, or
anything that might become caught in the Switch, such as a pin or paper clip.
When pressing the RESET button, do not use anything with a fragile tip, or anything
that might become caught in the Switch, such as a pin or paper clip. Doing so could
result in fire or electric shock.
Do not alter the physical makeup of the Switch.
Do not alter the physical makeup of the Switch. Doing so could result in a fire or
electric shock.
Do not subject the Switch to shocks.
In the event that the Switch is dropped or any of its components damaged, turn off the
power, unplug the power cable, and contact maintenance personnel. Discontinue
using the cable to avoid the risk of a fire or electric shock.
Do not place anything on the Switch.
Do not place any metallic object such as a small pin or a paper clip or any container
with a liquid, such as a vase or a flower pot, on the Switch. Liquid or metallic objects
falling into the Switch could result in a fire or electric shock.
Use the Switch only with an indicated power supply unit.
Do not use the Switch at any voltage other than the indicated voltage. Doing so could
result in fire or electric shock.

Safety Information
Safety-3
Ensure that the capacity for incoming current to the distribution board is greater
than the operating current of the circuit breaker.
Ensure that the capacity for incoming current to the distribution board is greater than
the operating current of the circuit breaker. If it is not, the circuit breaker might not
operate properly in the event of a failure, which could result in a fire.
Ground the Switch.
Always use a grounded power outlet for the Switch and EPUs. Using the Switch and
an EPU without grounding could result in electric shock or failures due to electrical
noise.
Do not use the Switch with the protection cap removed.
Do not remove the protection cap except when attaching a cable. Using an AX2500S
series switch without a protection cap could result in a fire or electric shock.
Handle power cables carefully.
Do not place anything heavy on a power cable. Do not pull, bend, or process a cable.
Doing so could damage the cable, resulting in fire or electric shock. If the power cable
is covered with a carpet or the like, it is easy to forget that the cable is there and to
place something heavy on it.
Use the supplied or a designated power cable. Using another cable could result in fire
or electric shock. In addition, do not use the supplied cable with other devices. Doing
so could result in a fire or electric shock.
If the power cable is damaged so that the wires underneath the covering are visible or
cut, stop using it, and ask maintenance personnel to replace it. Discontinue using the
cable to avoid the risk of fire or electric shock.
Make sure the power plug is free of dust, and insert the plug completely up to the base
of the prongs to prevent any looseness. Using a power plug with dust on it or one that
is imperfectly connected could result in fire or electric shock.
Do not touch the power plug with a wet hand. Doing so could result in electric shock.
Do not overload the power outlet.
Do not overload the power outlet by connecting multiple power plugs to the same
outlet. Overloading the outlet could result in fire or the circuit breaker tripping due to
excessive power used. This might affect other equipment.
Do not use an air duster near a flame.
When cleaning the optical connectors, do not use an air duster that contains
flammable gas near a flame. Doing so could result in a fire.

Safety Information
Safety-4
Do not remove the Switch cover.
Do not remove the Switch cover. Doing so could result in electric shock. The following
label is attached to a Switch.

Safety Information
Safety-5
Do not place the Switch in a place where it is unstable.
If placing the Switch on a desk, lay it on its side on a workbench capable of
withstanding the weight of the Switch. If, for example, you place the Switch on a shaky
table or a tilted surface, the Switch might fall and possibly injure someone.
When installing the Switch in a rack, make sure the Switch in the rack is stably
positioned. If the Switch is not positioned correctly, injury could result from falling
equipment or stumbling over the equipment.
Do not position the Switch vertically or lean it against a wall.
When installing the Switch on a table, position the Switch horizontally. If the Switch is
positioned vertically or leaned against a wall, the Switch might fall, which could result
in injury or damage.
Do not allow hair or objects near the ventilation slots.
Cooling fan units are mounted in AX2530S-24T4X, AX2530S-48T, AX2530S-48T2X,
AX2530S-24S4X switches and EPUs. Do not allow hair or other objects near the
ventilation slots. They might be sucked into the Switch, resulting in injury.
When moving the Switch, do not hold the handle of a power supply module.
Do not hold the handle of the power supply module when moving an EPU. The handle
might come off, resulting in the Switch falling and possibly causing injury. Also, the
EPU or the power supply module mightbecome damaged, resulting in a fire or electric
shock.
When moving a Switch
Before moving a Switch, you must turn it off and unplug all cables. Failure to do so
might cause the Switch or cable to become deformed, or might damage the Switch,
resulting in fire or electric shock.
If you must stack multiple Switches during transport, use appropriate packaging.
Failure to do so might cause the Switch to become deformed or might damage the
Switch, resulting in fire or electric shock.

Safety Information
Safety-6
Handle the power cable carefully.
Do not place the power cable near a heat-generating apparatus. The heat could melt
the cable coating, resulting in fire or electric shock.
When connecting or disconnecting theAC power cable from the outlet, always hold
the plug, not the cable itself. Pulling the cable might cause the wires to break.
When turning off the power, stop the supply of all power to the Switch.
If power is supplied to the Switch from an EPU, the Switch cannot be turned off by
simply setting the power switch on the Switch to OFF. To turn off the Switch, set the
power switch of both the Switch and the power supply module to OFF.
Do not touch the Switch directly if you have a metal allergy.
The Switch is coated with zinc, nickel, gold, and other elements. Do not touch the
Switch directly if you have an allergic reaction to these metals. Doing so might cause
eczema or skin irritation.
Avoid looking directly at laser beams.
The Switch uses laser beams that are colorless and transparent, and invisible to the
eye. Never look directly into the optical transceiver.

Safety Information
Safety-7
Do not touch the SFP-T during operation and just after operation stops.
During operation (when a link is established), the temperature of the SFP-Tcan rise to
65ºC. Do not touch the device while it is operating or just after it stops. Doing so could
result in burns.
To remove the SFP-T, use the procedure below. Failure to do so could result inburns.
To remove the SFP-T when the Switch is turned on, block the SFP slot or the SFP+
slot, and then wait 5 minutes before removing the SFP-T.
To remove the SFP-T while the Switch is off, turn off the Switch, and then wait 5
minutes before removing the SFP-T.
The following label is attached to the SFP-T.
Do not install the Switch in a dusty or humid location.
Do not install the Switch in a dusty or humid location. Doing so could result in fire or
electric shock.
Condensation might form on the surfaces and the inside of the Switch if it is moved
from a cold location to a warm location. Using the Switch in this condition could result
in fire or electric shock. After moving the Switch between two locations with a large
temperature variation, let the Switch stand a few hours before using it.
Do not step on the Switch, lean against it, or place anything on it.
Do not step on the Switch or lean against it. Doing so might damage the Switch.
Furthermore, the Switch might fall, or become unbalanced, resulting in injury.
Do not place any objects on the Switch. Doing so might damage the Switch.
Furthermore, the Switch might fall, or become unbalanced, resulting in injury.
Do not touch the inside of the Switch with your hands.
Do not carelessly put your hands inside the Switch. The frame and components might
cause injury.

Safety Information
Safety-8
Attach a blank panel to a slot in which a power supply module for an EPU is not
installed.
Be sure to attach a blank panel to any slots for which a power supply module for an
EPU is not installed. If you use the Switch without attaching the blank panel, you might
be injured by a moving part. In addition, if foreign objects fall into the Switch, the
Switch might no longer work properly.
Cleaning
Remove dust on and around the Switch regularly. In addition to possibly causing the
Switch to stop, accumulated dust might result in fire or electric shock.