Alaxala AX2500S, Руководство по устранению неисправностей

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Contents
Preface ................................................................................................................................................. I
Safety Information ............................................................................................................................. 1
1.
Overview ........................................................................................................................................ 1
1.1 Overview of analyzing failures ............................................................................................ 2
1.2 Overview of analyzing failures of all or part of the Switch................................................... 3
1.3 Overview of analyzing failures of functionality .................................................................... 5
2.
Troubleshooting Switch Failures ................................................................................................ 9
2.1 Procedure for handling Switch faults ................................................................................. 10
2.1.1 Procedure for handling Switch faults ................................................................... 10
2.1.2 Isolating the cause of external power unit failures ............................................... 12
2.1.3 Replacing the Switch and optional modules ........................................................ 13
3.
Troubleshooting Functional Failures During Operation ......................................................... 15
3.1 Login-related problems ..................................................................................................... 16
3.1.1 Forgotten login user password............................................................................. 16
3.1.2 Forgotten device administrator password ............................................................ 16
3.2 Operation terminal problems ............................................................................................. 17
3.2.1 Information cannot be entered from the console or does not display correctly ... 17
3.2.2 Login from a remote terminal is not possible ....................................................... 19
3.2.3 Login authentication using RADIUS is not possible ............................................ 20
3.2.4 Commands cannot be entered ............................................................................ 20
3.3 Problems occurring while saving files ............................................................................... 21
3.3.1 Information cannot be saved in the startup configuration file .............................. 21
3.3.2 Copying or writing information to a memory card is not possible ........................ 21
3.3.3 Copying or writing information to the RAMDISK is not possible .......................... 22
3.3.4 Update by using the "ppupdate" operation command is not possible ................. 23
3.3.5 Restoring data by using the "restore" operation command is not possible ......... 23
3.3.6 Saving or restoring the binding 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
3.4.3 Actions to be taken for 100BASE-FX [24S4X]/1000BASE-X problems ............... 27
3.4.4 Actions to be taken for 10GBASE-R problems [10G models] .............................. 29
3.4.5 Actions to be taken for direct attach cable problems [10G models] ..................... 30
3.4.6 Communication failures when link aggregation is used ....................................... 31
3.5 Layer 2 network communication failures ........................................................................... 33
3.5.1 Layer 2 communication by VLANs is not possible ............................................... 33
3.5.2 Failures occurring when the Spanning Tree functionality is used ........................ 36
3.5.3 Failures occurring when the Ring Protocol functionality is used ......................... 37
3.5.4 Failures when the DHCP snooping functionality is used ..................................... 40
3.5.5 Multicast forwarding by IGMP snooping is not possible ...................................... 45
3.5.6 Multicast forwarding by MLD snooping is not possible ........................................ 47
3.6 IPv4 network communication failures ............................................................................... 49
3.6.1 Communication is not possible or is disconnected .............................................. 49
3.6.2 Communication failures occurring when the DHCP server is used ..................... 52
3.7 IPv6 network communication failures ............................................................................... 54
3.7.1 Communication is not possible or a disconnection occurred ............................... 54
3.8 Layer 2 authentication communication failures ................................................................. 57
3.8.1 Communication failures occurring when IEEE 802.1X is used ............................ 57
3.8.2 Communication failures occurring when Web authentication is used ................. 61
3.8.3 Communication failures occurring when MAC-based authentication is used ...... 65
3.8.4 Communication failures occurring when secure Wake-on-LAN is used [OS-L2A]
............................................................................................................................ 69