Alaxala AX2500S Troubleshooting Manual Download Page 20

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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.

Summary of Contents for AX2500S

Page 1: ...AX2500S Troubleshooting Guide AX25S T001X 60...

Page 2: ...s a registered trademark of Microsoft Corporation in the United States and other countries RSA and RSA SecurID are trademarks or registered trademarks of RSA Security Inc in the United States and othe...

Page 3: ...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...

Page 4: ...he 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 a...

Page 5: ...irect 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 c...

Page 6: ......

Page 7: ...S 24T4X switches 48T This description applies to AX2530S 48T switches 48T2X This description applies to AX2530S 48T2X switches 24S4X This description applies to AX2530S 24S4X switches 10G models The d...

Page 8: ...s 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 Ad...

Page 9: ...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 Mai...

Page 10: ...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...

Page 11: ...ormation 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 Se...

Page 12: ...ED 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...

Page 13: ...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...

Page 14: ...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 a...

Page 15: ...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...

Page 16: ...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...

Page 17: ...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...

Page 18: ...ied 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 suppl...

Page 19: ...l 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...

Page 20: ...y 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...

Page 21: ...esirable environment Using the switch in the following locations might shorten the life of the switch or result in a switch malfunction An area with salty air such as the coast An area where corrosive...

Page 22: ...y unit is being used for the Switch Handle memory cards and dummy memory cards carefully When installing a memory card and a dummy memory card do not force the card When removing a memory card do not...

Page 23: ...Switch might fail AX2530S 24T4X Supported ports 25 to 28 AX2530S 24S4X Supported ports 25 to 28 AX2530S 48T2X Supported ports 51 to 52 Make sure that you use a valid combination for the transceiver a...

Page 24: ...e ferrule tip Do not apply excessive pressure when cleaning Doing so might damage the ferrule tip Rotate the optical connector cleaner stick clockwise only Rotating the cleaner alternately clockwise a...

Page 25: ...nding database is not possible 23 3 4 Network interface communication failures 24 3 4 1 Ethernet port cannot be connected 24 3 4 2 Actions to be taken for 10BASE T 100BASE TX 1000BASE T problems 25 3...

Page 26: ...obtained from the NTP server 82 3 14 Communication failures in the IEEE 802 3ah UDLD functionality 83 3 14 1 Port is in inactivate status by the IEEE 802 3ah UDLD functionality 83 3 15 Communication...

Page 27: ...iew This chapter provides an overview of failure analysis 1 1 Overview of analyzing failures 1 2 Overview of analyzing failures of all or part of the Switch 1 3 Overview of analyzing failures of funct...

Page 28: ...eries switch When failure analysis requires looking at the actual Switch do the analysis according to 1 2 Overview of analyzing failures of all or part of the Switch When failure analysis requires log...

Page 29: ...dy startup Blinking green at long intervals LED operation OFF setting Lit in orange Initial state at power up Blinking red Partial failure in the device Lit in red Fatal failure in the device operatio...

Page 30: ...at power up Off Link failure or block when the green ST1 LED is lit 10 RESET Button non lockin g Manual reset button of the Switch 1 Restarts the device When pressed continuously until all LEDs on th...

Page 31: ...nnot be saved in the startup configuration file Copying data to a memory card not possible 3 3 2 Copying or writing information to a memory card is not possible Copying data to the RAMDISK not possibl...

Page 32: ...n not possible 3 6 1 Communication is not possible or is disconnected IP addresses cannot be assigned by the DHCP server 3 6 2 Communication failures occurring when the DHCP server is used IPv6 networ...

Page 33: ...tained by the LLDP functionality NTP communication failures 3 13 NTP communication failures Communication failures when the IEEE 802 3ah UDLD functionality is used Port in inactivate status 3 14 1 Por...

Page 34: ...1 Overview 8...

Page 35: ...9 2 Troubleshooting Switch Failures This chapter describes how to take actions when a failure occurs on a Switch 2 1 Procedure for handling Switch faults...

Page 36: ...restart the Switch and then check whether there are any problems in the environment 1 Turn the Switch off and then on again to restart the Switch 2 If you can restart the Switch execute the show loggi...

Page 37: ...LED indications of the Switch and EPU show no abnormality but the device administrator command displays EPU notconnect Make sure that the cable is properly connected between the Switch and EPU If the...

Page 38: ...ower unit hardware failures No Problem Action 1 The power switch of the EPU is off Turn the power switch on 2 The power cable of the EPU is not correctly connected to the Switch 1 Turn the power switc...

Page 39: ...ule 2 1 3 Replacing the Switch and optional modules The procedure to replace the Switch and optional modules is described in the Hardware Instruction Manual Follow the instructions in the manual Optio...

Page 40: ...2 Troubleshooting Switch Failures 14...

Page 41: ...nication failures 3 8 Layer 2 authentication communication failures 3 9 Communication failures in the high reliability functionality based on a redundant configuration 3 10 SNMP communication failures...

Page 42: ...can log in but does not know the password for the enable operation command take the following steps 1 Restart the Switch and then press and hold down Ctrl N until login is displayed on the console By...

Page 43: ...accepted Perform the following procedure 1 Data transmission might have been interrupted by XON XOFF flow control End the interruption by pressing Ctrl Q If the Switch still does not accept entry from...

Page 44: ...era Term Pro to log in but unexpected characters are displayed during login Negotiation with the communication software might not have been performed correctly See No 3 Issue a break signal by pressin...

Page 45: ...terminal is waiting for user ID and password entry or if a login attempt has failed If such terminals are present finish the communication software of those terminals 5 Check if there was any event t...

Page 46: ...esponse timeout value in seconds x set number of resend attempts 1 x set number of RADIUS servers If the time increases significantly an application on a remote terminal such as Telnet might have term...

Page 47: ...flash operation command in the manual Operation Command Reference 2 If a message other than Flash format complete is displayed the file system might be corrupted 3 3 2 Copying or writing information t...

Page 48: ...information to the RAMDISK and action to take No Items to check and commands Items to check 1 Check the response message to the command Perform the following procedure 1 Make sure the specified file e...

Page 49: ...name of the Switch refer to the Model value displayed by using the show version operation command If no software is specified for the backup operation command no software must be specified for the re...

Page 50: ...f the link aggregation this is a normal operating status Do not activate the port by using the activate operation command Use the show channel group operation command with the detail parameter to chec...

Page 51: ...utdown configuration command to activate the target port 3 4 2 Actions to be taken for 10BASE T 100BASE TX 1000BASE T problems If a 10BASE T 100BASE TX 1000BASE T problem occurs use the procedure belo...

Page 52: ...d the automatic MDIX functionality is disabled for the target port Check the cable length For the cable length see the Hardware Instruction Manual Check whether the cables are connected correctly For...

Page 53: ...Items to check Cause Action 1 Use the show interfaces operation command to display the failure statistics and check whether there is a count for the item shown below for the target line If there is a...

Page 54: ...aces operation command and take the action described in Action For the test types to be specified see 5 1 Testing a line 3 Use the show interfaces operation command to display the failure statistics a...

Page 55: ...s 10G models No Items to check Cause Action 1 Use the show interfaces operation command to display the failure statistics and check whether there is a count for the item shown below for the target lin...

Page 56: ...ical level is correct Perform a line test on the Switch and make sure that the functionality of the receiving side has no problem Check the results of the no test interfaces operation command and take...

Page 57: ...tion Manual 3 Use the show interfaces operation command to display the failure statistics and check whether there is a count for the item shown below for the target port If there is a count see the Ca...

Page 58: ...the status of each port displayed for Status If all ports of the link aggregation group have gone down the link aggregation group also goes down Detached The port went down or is reserved a port spee...

Page 59: ...he default VLAN is set in allowed vlan for trunk ports The port is specified as a mirror port b For protocol VLANs When you are using a protocol VLAN execute the show vlan operation command and make s...

Page 60: ...make sure the port status is Up If the status is Down see 3 4 Network interface communication failures Make sure the port status is Forwarding If it is Blocking the cause is indicated in parentheses...

Page 61: ...d for Type See 3 5 5 Multicast forwarding by IGMP snooping is not possible and 3 5 6 Multicast forwarding by MLD snooping is not possible When Dot1x is displayed for Type See 3 8 1 Communication failu...

Page 62: ...nk system sml domain system sml id If Ring Protocol and Multiple Spanning Tree are used together go to No 8 Check whether the number of the PVST instances is within the capacity limits 2 Execute the s...

Page 63: ...efined in the network configuration If they are different from the network configuration check the status of the neighboring devices 6 Check whether the value for the maximum number of Spanning Tree P...

Page 64: ...or Oper State go to No 2 If a hyphen is displayed for Oper State required items for using the Ring Protocol have not been configured Check the configuration If disable is displayed for Oper State the...

Page 65: ...lan detail operation command to check the state of the VLAN used for the Ring Protocol and the VLAN port states If there is no anomaly in the states of the VLAN and its ports go to No 8 In addition to...

Page 66: ...take when a DHCP client terminal cannot establish communication No Items to check and commands Action 1 Use the show ip dhcp snooping binding operation command to check whether the IP address and MAC...

Page 67: ...se If It was not able to store binding database in flash has been recorded use the following procedure to change the save location to a memory card MC 1 Use the ip dhcp snooping database url configura...

Page 68: ...e show logging operation command to check the operation log for saving the binding database If It was not able to store binding database in mc retry reason has been recorded the database could not be...

Page 69: ...y card and memory card slot for dust If there is dust wipe it off with a dry cloth and then insert the memory card into the slot again After inserting the memory card execute the format mc operation c...

Page 70: ...cp snooping database url mc is set go to No 3 If ip dhcp snooping database url mc is not set set the ip dhcp snooping database url mc saved file name configuration command 3 Use the show logging opera...

Page 71: ...y card itself might be corrupted Clear the IP addresses on the DHCP client terminal In Windows in the Command Prompt window execute ipconfig release and then ipconfig renew 3 5 5 Multicast forwarding...

Page 72: ...messages is displayed 1 If the IGMP querier exists the IP address of the IGMP querier is displayed IGMP querying system 192 168 11 20 2 If the IGMP querier does not exist nothing is displayed for IGM...

Page 73: ...rding by MLD snooping is not possible If multicast forwarding is impossible when MLD snooping is used use the following analysis flowchart to determine the problem and isolate the cause Figure 3 4 Ana...

Page 74: ...the sender IP address has been set by using the ipv6 mld snooping source configuration command MLD querying system 3 If the sender IP address has not been set by the ipv6 mld snooping source configura...

Page 75: ...ration and network configuration before and after the change to uncover any cause that could disable communication This subsection describes the procedure for isolating the fault location to determine...

Page 76: ...terface operation command to check whether the status of the interface with the target neighboring device is Up or Down 3 If the status of the target interface is Down see 3 4 Network interface commun...

Page 77: ...d to check the status of address resolution whether ARP entry information exists between the Switch and the neighboring device 3 If the address with the neighboring device has been resolved ARP entry...

Page 78: ...f you have checked the client and server settings such as network card settings and cable connections and concluded that cause 3 applies for example the configuration and network configuration are cor...

Page 79: ...rectly connected check the hub and cable connections d Checking the filtering and QoS control configuration information If communication is not possible even when there is no physical failure on the S...

Page 80: ...disable communication This subsection describes the procedure for isolating the fault location to determine the cause of a problem and applies mainly to cause 3 failures For example IPv6 communicatio...

Page 81: ...3 Identifying the range for a failure from the Switch If a failure has not occurred on the Switch a failure might have occurred somewhere on the route between the Switch and the remote devices To ide...

Page 82: ...entical Alternatively see 3 4 Network interface communication failures 6 Checking the default gateway information You need to check the default gateway information obtained by the Switch if a communic...

Page 83: ...RxInvalid or RxLenErr an invalid EAPOL frame has been received from the terminal in which case the event is logged Use the show dot1x logging operation command to view the log The Invalid EAPOL frame...

Page 84: ...ayed Authentication failed for either of the reasons shown below Check for problems 1 The user ID or password has not been registered on the authentication server 2 The user ID or password is entered...

Page 85: ...DIUS attribute of the RADIUS server Reason Invalid Tunnel Private Group ID Attribute Dynamic allocation has failed because an invalid value is set for the Tunnel Private Group ID attribute for the RAD...

Page 86: ...reful of the following when using a VLAN name configured using the name configuration command as a VLAN after RADIUS authentication Specify a unique VLAN name If the same VLAN name is used for two or...

Page 87: ...ip address configuration command or URL redirection has been enabled by the web authentication redirect enable configuration command If URL redirection is enabled make sure the IP address is set for a...

Page 88: ...erver Fixed VLAN mode Check whether the RADIUS server s VLAN ID indicated by NAS Identifier matches the VLAN ID to which the terminal to be authenticated belongs Dynamic VLAN mode Correct the configur...

Page 89: ...down status nor shut down For other cases check the Web authentication configuration 1 Check the following configuration command settings 1 When both the switchport mac vlan and no switchport mac auto...

Page 90: ...ses for the following VLAN interfaces are set correctly Pre authentication VLAN Post authentication VLAN 3 DHCP server setting When the DHCP server is used see 3 6 2 Communication failures occurring w...

Page 91: ...ck configuration command is set make sure the MAC address and the VLAN ID to which the terminal to be authenticated belongs are registered Dynamic VLAN mode Make sure the MAC address and the post auth...

Page 92: ...an authentication IPv4 access list is set When both a standard access list and an authentication IPv4 access list are set for an authenticating port make sure the filtering conditions in the authenti...

Page 93: ...t The VLAN ID for the RADIUS server has been set by vlan mac based The VLAN ID of the authenticating port does not match switchport mac dot1q vlan 2 When both the switchport mac vlan and no switchport...

Page 94: ...nterface is set correctly Dynamic VLAN mode Make sure the IP addresses for the following VLAN interfaces are set correctly Pre authentication VLAN Post authentication VLAN 3 Filtering setting Certain...

Page 95: ...Use the show wol authentication user operation command to check whether user information is registered If the user is not registered use the set wol authentication user operation command to register...

Page 96: ...the startup check will be performed and then use the set wol device ip operation command to add the IP address information After the changes use the commit wol device operation command to apply the in...

Page 97: ...he link debounce setting for the target port If the link debounce configuration command has not been set that is the default of 2000 milliseconds is used for operation or if a value greater than 2000...

Page 98: ...cases go to No 9 9 Use the operation command show switchport backup mac address table update statistics to make sure the value displayed for Transmission over flows has been incremented If the value...

Page 99: ...the peer link ports Perform the following procedure for recovery 1 See 3 4 3 Actions to be taken for 100BASE FX 24S4X 1000BASE X problems 3 4 4 Actions to be taken for 10GBASE R problems 10G models a...

Page 100: ...uration command to set information about the SNMP manager show running config ip access list standard SNMPMNG permit host 128 1 1 2 snmp server community NETWORK ro SNMPMNG When using SNMPv3 Execute t...

Page 101: ...n has not been set correctly execute the following configuration commands to set the information about SNMP and traps snmp server engineID local snmp server view snmp server user snmp server group snm...

Page 102: ...2 Using an operation command to check the operation Execute the show sflow operation command a few times to display the sFlow statistics and check whether the sFlow statistics functionality is running...

Page 103: ...guration example 1 config show sflow destination 192 1 1 1 6455 Collector information must be set correctly sflow sample 2048 config Make sure that the sampling interval has been set If the sampling i...

Page 104: ...ss of an sFlow packet has been set by using the sflow source command make sure that the IP address has been assigned to the port of the Switch Figure 3 13 Configuration example 4 config show sflow des...

Page 105: ...er packets are forwarded Figure 3 15 Example of the port status show interfaces gigabitethernet 0 5 Date 2010 08 04 15 02 35 UTC Port 0 5 active up 1000BASE T full auto 00eb f103 0102 Time since last...

Page 106: ...3 Troubleshooting Functional Failures During Operation 80 config...

Page 107: ...evice is connected If the Tx count has been incremented but the Rx count has not check No 1 through No 3 on the neighboring device If the Tx count has also been incremented on the neighboring device t...

Page 108: ...w clock operation command to make sure the time zone is set If the time zone is set in the information displayed by the command go to No 2 If the time zone is not set in the information displayed by t...

Page 109: ...gs value has not been incremented go to No 4 4 Make sure the Switch is directly connected to the partner switch If a media converter or hub is connected between switches review and correct the network...

Page 110: ...access list applied to the interface the number of packets that match the filtering conditions and the number of packets discarded by a filter entry for implicit discard 3 Compare the filtering condit...

Page 111: ...mirroring failures 3 16 1 BPDUs are sent from a mirror port To stop sending BPDUs from a mirror port when the port mirroring functionality is enabled use the spanning tree bpdufilter configuration com...

Page 112: ...When the status of the ports changes to link up the LEDs do not light with the normal brightness automatic operation is disabled Use the show system operation command to check the information displaye...

Page 113: ...change the setting to action enable and save the setting 2 After the sleep period ends the Switch does not run with the specified configuration When the Switch enters sleep mode on a schedule any con...

Page 114: ...k and commands Action 6 When the wake up option is set linking up the port configured to detect link up fails to cancel sleep mode 1 Make sure that the wake up option is configured 2 Make sure that th...

Page 115: ...wing problems might have occurred 1 The Switch was restarted for example by turning the power off and on while temperature history information was being saved to the internal flash memory which result...

Page 116: ...3 Troubleshooting Functional Failures During Operation 90...

Page 117: ...91 4 Obtaining Failure Information This chapter describes how to obtain failure information 4 1 Obtaining failure information 4 2 Writing data to a memory card 4 3 Transferring files via FTP...

Page 118: ...ows you to save the collected information on the RAMDISK in text format and then write the information to a memory card or transfer the information via FTP Figure 4 1 Saving information to the RAMDISK...

Page 119: ...capacity of the source file showtech txt show ramdisk file Date 2010 08 06 17 38 20 UTC File Date Size Name 2010 08 06 17 37 1 265 showtech txt Use the show mc operation command to check available spa...

Page 120: ...ory on a PC with a Switch IP address of 192 168 0 1 Figure 4 3 Transferring files via FTP Log in to the Switch via FTP from an FTP client PC C TEMP ftp 192 168 0 1 Log in to the Switch from an FTP cli...

Page 121: ...95 5 Line Testing 5 1 Testing a line...

Page 122: ...r the RJ45 connector and transceiver Loop connector loopback test Loop connector Switch including the RJ45 connector and transceiver The following table shows the fault locations suspected from the re...

Page 123: ...abitethernet 0 2 internal interval 5 pattern 1 length 100 no test interfaces gigabitethernet 0 2 Date 2010 08 06 04 07 39 UTC Interface type 100BASE TX Test count 13 Send OK 13 Send NG 0 Receive OK 13...

Page 124: ...Note that if the loop connecter is not connected or if the connected loop connector is inappropriate for the port the test might provide invalid results For 10BASE T 100BASE TX and 1000BASE T SFP port...

Page 125: ...rocedure Figure 5 4 Twisted pair cable 2 As shown in the following figure insert the cables into the connector and crimp them with a crimping tool Figure 5 5 Overview of a 10BASE T 100BASE TX 1000BASE...

Page 126: ...5 Line Testing 100...

Page 127: ...101 Appendix A Detailed Display Contents of the show tech support Command...

Page 128: ...information Note that some information might not appear depending on the software version Table A 1 Displayed information No Command displayed Description No parameter specified layer 2 specified 1 s...

Page 129: ...el Y Y 26 show cpu days hours CPU usage in days or hours Y Y 27 show cpu minutes seconds CPU usage in minutes or seconds Y Y 28 show memory summary Memory usage of the device Y Y 29 show interfaces de...

Page 130: ...s DHCP snooping statistics Y Y 51 show ip arp inspection statistics Dynamic ARP inspection statistics Y Y 52 show igmp snooping IGMP snooping information Y Y 53 show igmp snooping group IGMP snooping...

Page 131: ...ion detail Detailed information on users authenticated by Web authentication Y Y 76 show web authentication login summary port Information on users authenticated by Web authentication by port Y Y 77 s...

Page 132: ...Entries registered in the internal DB for Secure Wake on LAN user authentication Y Y 95 show wol device name edit Entries registered or changed in the internal DB for registering terminals that send t...

Page 133: ...m remote mep detail CFM remote MEP details Y Y 115 show cfm fault Information on faults detected by CFM continuity checks Y Y 116 show cfm fault detail Details on faults detected by CFM continuity che...

Page 134: ...ion for software updates Y Y 130 show on api webauth html file user OAN User list information related to replacement HTML files for the Web authentication login page Y Y 131 show on api energy saving...

Page 135: ...ssible 21 copying or writing information to the RAMDISK is not possible 22 counter samples cannot be sent to the collector 79 creating loop connectors 98 D dates are not displayed correctly in tempera...

Page 136: ...ures 86 power saving scheduling is disabled 87 problems occurring while saving files 21 problems related to the support of a long life solution 89 Q QoS configurations communication failures 84 R rest...

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