Alaxala AX6700S series User manual

AX6700S/AX6600S/AX6300S/AX3800S/AX3600S/AX2400S
Troubleshooting Guide
AX36S-T001-B0X
Reading and storing this manual:
yBefore you use the equipment, carefully read the manual and make sure you understand all safety
precautions.
yAfter reading the guide, keep it in a convenient place for easy reference.

Relevant products
This manual applies to the models in the AX6700S, AX6600S, AX6300S, AX3800S, AX3600S, and AX2400S series
of switches.
Export restrictions
If you plan to export any of the models, complete the necessary procedures after checking the Foreign Exchange
and Foreign Trade Act and U.S. laws and regulations concerning such exports. If you require more information,
please contact an Alaxala sales representative.
Trademarks
- Cisco is a registered trademark of Cisco Systems, Inc. in the United States and other countries.
- Ethernet is a registered trademark of Xerox Corporation.
- Internet Explorer is either a registered trademark or trademark of Microsoft Corporation in the United States and
other countries.
- IPX is a trademark of Novell, Inc.
- Microsoft is either a registered trademark or trademark of Microsoft Corporation in the United States and other
countries.
- Octpower is a registered trademark of NEC Corporation.
- RSA and RSA SecurID are trademarks or registered trademarks of RSA Security Inc. in the United States and
other countries.
- sFlow is a registered trademark of InMon Corporation in the United States and other countries.
- UNIX is a registered trademark of The Open Group in the United States and other countries.
- VitalQIP and VitalQIP Registration Manager are trademarks of Lucent Technologies.
- VLANaccessClient is a trademark of NEC Soft, Ltd.
- VLANaccessController and VLANaccessAgent are trademarks of NEC Corporation.
- Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
- Other company and product names in this manual 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.
Please note that the actual product might differ from how it is depicted in output examples and figures.
Edition history
August 2011 (Edition 12) AX36S-T001-B0X (SOFT-AM-0006_R12X)
Copyright
All Rights Reserved, Copyright (C) 2005, 2011, ALAXALA Networks, Corp.

History of Amendments
(Edition 12)
Summary of amendments
Location and title Changes
1.2.2 Failure analysis for the AX3800S,
AX3600S, and AX2400S series
zA description of AX3800S series switches has been
added.
3.8.7 Communication is not possible in IPv4
PIM-DM networks
zThis subsection was added.
3.8.8 Multicast data is forwarded twice in an IPv4
PIM-DM network
zThis subsection was added.
In addition to the above changes, minor editorial corrections were made.
(Edition 11)
Summary of amendments
Item Changes
Failure analysis for the AX3600S and AX2400S
series
zA description of AX3600 and AX2400S series switches
was added.
Failures occurring when the Ring Protocol
functionality is used
zA description of the multi-fault monitoring functionality
was added.
Communication is not possible or is
disconnected
zThe description was changed in accordance with the
addition of VRF support in AX3600S and AX2400
series switches.
Communication is not possible or is
disconnected
zThe description was changed in accordance with the
addition of VRF support in AX3600S and AX2400
series switches.
Creating loop connectors zThis subsection was added.
Detailed display contents of the "show
tech-support" command
zCommands were added to the detailed description.
(Edition 10)
Summary of amendments
Item Changes
IPv4 network communication failures zActions to be taken when using DHCP snooping were
added.
IPv6 DHCP relay communication problems zThis subsection was added.
IPv6 multicast communication problems in VRF zThis subsection was added.
IPv6 multicast communication problems in an
extranet
zThis subsection was added.

Item Changes
Problems due to the redundant configuration of
the NIF
zThis section was added.
Access list logging problems zThis section was added.
DHCP snooping problems zThis section was added.
Detailed display contents of the "show
tech-support" command
zCommands were added to the detailed description.
(Edition 9)
Summary of amendments
Item Changes
Login from a remote terminal is not possible zActions to be taken when a user cannot log in were
added.
Login authentication using RADIUS/TACACS+ is
not possible
zActions to be taken when a user cannot log in to the
Switch were added.
Command authentication using
RADIUS/TACACS+ and local is not possible
zItems to be checked were added.
zActions to be taken when all commands are restricted
were added.
Actions to be taken for
100BASE-FX/1000BASE-X problems
zActions to be taken for 100BASE-FX were added.
Problems that occur during IPv4 multicast
communication in the extranet
zThis subsection was added, and actions to be taken
when a problem occurs during IPv4 multicast
communication in the extranet were added.
Communication is not possible or is
disconnected
zItems to be checked for the optional license OP-NPAR
were added.
No IPv6 routing information exists in the VRF zThis subsection was added, and a description of the
failure analysis method for the option license
OP-NPAR was added.
Communication is not possible with uplink
redundancy
zThis subsection was added, and a description of the
failure analysis method with uplink redundancy was
added.
Detailed display contents of the "show
tech-support" command
zCommands were added to the detailed description.
(Edition 8)
Summary of amendments
Item Changes
Addition of series zA description relating to the addition of AX6600S series
switches was added.

Item Changes
Procedure for handling switch faults zItems for handling failures were added.
Memory card problems zThis section was added.
BSU/PSP communication failures zPSP was added. In addition, items for analyzing
failures were added or modified.
Actions to be taken for PoE problems zThis subsection was added.
Failures occurring when the Ring Protocol
functionality is used
zItems for analyzing failures were added.
GSRP communication failures zItems for analyzing failures were added.
Power saving-related problems zThis section was added.
(Edition 7)
Summary of amendments
Item Changes
Communication is not possible or is
disconnected
zItems to be checked for the optional license OP-NPAR
were added.
No RIP routing information exists zItems to be checked for the optional license OP-NPAR
were added.
No OSPF routing information exists zItems to be checked for the optional license OP-NPAR
were added.
No BGP4 routing information exists zItems to be checked for the optional license OP-NPAR
were added.
zThe actions to be taken were changed.
No routing information exists in the VRF zThis subsection was added.
Communication failures in the IPv4 multicast
routing functionality
zItems for analyzing failures were added.
zItems to be checked for the optional license OP-NPAR
were added.
No BGP4+ routing information exists zThe actions to be taken were changed.
Communication failures in the IPv6 multicast
routing functionality
zItems for analyzing failures were added.
Communication failures occurring when Web
authentication is used
zItems for analyzing failures were added.
zThe actions to be taken were changed.
Communication failures occurring when
MAC-based authentication is used
zThe actions to be taken were changed.
Communication is not possible with the VRRP
configuration of IPv4 networks
zItems for analyzing failures of the grouping
functionality were added.
Communication is not possible with the VRRP zItems for analyzing failures of the grouping

Item Changes
configuration of IPv6 networks functionality were added.
Packet congestion in CPU processing does not
recover
zThis section was added.
Detailed display contents of the "show
tech-support" command
zContent displayed by the added or changed
commands was added.
(Edition 6)
Summary of amendments
Item Changes
Information cannot be entered from the console
or does not appear correctly
zThe item "After line disconnection, reconnection is not
possible." for problems occurring during connection to
a modem was added.
Ethernet port cannot be connected zActions to be taken when L2 loop detection
functionality deactivates the port (makes it inactive)
were added to the port status check items.
Actions to be taken for
10BASE-T/100BASE-TX/1000BASE-T problems
zItems to be checked for pin-mapping depending on the
port settings were added.
Failures occurring when the spanning tree
functionality is used
zActions to be taken when the spanning tree
functionality is used with the Ring Protocol were
added.
Multicast forwarding by IGMP snooping is not
possible
zItems to be checked when using IPv4 multicast
concurrently were added.
Multicast forwarding by MLD snooping is not
possible
zItems to be checked when using IPv6 multicast
concurrently were added.
Communication is not possible on the IPv4
PIM-SM networks
zActions to be taken when checking by using the show
igmp-snooping command
Communication is not possible on the IPv4
PIM-SSM networks
zActions to be taken when checking by using the show
igmp-snooping command
Communication is not possible on the IPv6
PIM-SM networks
zActions to be taken when checking by using the show
mld-snooping command
Communication is not possible on the IPv6
PIM-SSM networks
zActions to be taken when checking by using the show
mld-snooping command
Communication failures occurring when Web
authentication is used
zActions to be taken when an operation log message is
output, and when authentication for a terminal subject
to authentication fails completely were added.
Transferring maintenance information files zThe procedure for transferring information when a
configuration file failure occurs was added.
Detailed display contents of the "show
tech-support" command
zContent displayed by the added commands was
added.

(Edition 5)
Summary of amendments
Item Changes
MAC-based authentication zThis item was added.
(Edition 4)
Summary of amendments
Item Changes
Ring Protocol zThis item was added.
(Edition 3)
Summary of amendments
Item Changes
Additional model zA description relating to the additional model was
added.
Web Authentication zThis item was added.
sFlow statistics zThis item was added.
IEEE 802.3ah/UDLD functionality zThis item was added.
(Edition 2)
Summary of amendments
Item Changes
Additional model zA description relating to the additional model was
added.
Authentication VLAN zThis item was added.
SNMPv3 zThis item was added.
Detailed display contents of the "show
tech-support" command
zThis item was added.

I
Preface
Relevant products
This manual applies to the models in the AX6700S, AX6600S, AX6300S, AX3800S,
AX3600S, and AX2400S series of switches.
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.
Corrections to the manual
Corrections to this manual are contained in the Manual Corrections.
Intended readers
This manual is intended for system administrators who configure and operate a network
system that uses AX6700S, AX6600S, AX6300S, AX3800S, AX3600S, and AX2400S
series switches.
Readers must have an understanding of the following:
zThe basics of network system management
Manual URL
You can view this manual at the following Web site:
http://www.alaxala.com/en/index.html

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 a switch.
AX6700S, AX6600S, and AX6300S series switches

Preface
III
AX3800S and AX3650S series switches

Preface
IV
AX3640S and AX3630S series switches

Preface
V
AX2400S series switches

Preface
VI
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
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 (can also appear 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
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

Preface
VII
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

Preface
VIII
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
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
packet/s packets per second (can also appear as pps)
PAD PADding
PAE Port Access Entity
PC Personal Computer
PCI Protocol Control Information

Preface
IX
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
SFP+ Enhanced 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

Preface
X
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
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: The terms "Switch" and "switch"
The term Switch (upper-case "S") is an abbreviation for any or all of the following models:
zAX6700S series switch
zAX6600S series switch
zAX6300S series switch
zAX3800S series switch
zAX3600S series switch
zAX2400S 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.

Preface
XI
Conventions: KB, MB, GB, and TB
This manual uses the following conventions:
1 KB (kilobyte) is 1,024 bytes.
1 MB (megabyte) is 1,0242bytes.
1 GB (gigabyte) is 1,0243bytes.
1 TB (terabyte) is 1,0244bytes.

Preface
XII