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