Troubleshooting guide

1. Overview
10
1.3 Overview of analyzing failures of functionality
The following table provides an overview of analyzing functional failures on the Switch.
Because communication failures in a lower layer might cause communication failures in an upper
layer, check the items applicable to lower layers.
Table 1-3: Status of functional failures and where to find information
Category Sub-category Reference
Forgotten login password Forgotten login user password 3.1.1 Forgotten login user password
Forgotten administrator mode
password
3.1.2 Forgotten password for administrator
mode
Memory card problems
MC : -------- is displayed. 3.2.1 The "show system" or "show mc"
command displays "MC : --------"
MC not found. is displayed. 3.2.2 "MC not found." is displayed when the
memory card is accessed
Operation terminal problems Data cannot be input from or
displayed in the console.
3.3.1 Information cannot be entered from the
console or does not appear correctly
Remote login to the switch not
possible
3.3.2 Login from a remote terminal is not
possible
Returning to administrator mode is
not possible
3.3.3 Returning to administrator mode from
configuration command mode is not possible
Login authentication not possible 3.3.4 Login authentication using RADIUS/
TACACS+ is not possible
Command authorization not possible 3.3.5 Command authorization using RADIUS/
TACACS+ and local is not possible
Stack configuration problems Stack configuration is not possible 3.4.1 Stack configuration is not possible
Stack configuration cannot be edited 3.4.2 Stack configuration cannot be edited
Configuring a stack by a fixed master
switch
3.4.3 Configuring a stack with a specific
member switch as the master switch
Network interface
communication failures
Ethernet port communication failure 3.5.1 Ethernet port cannot be connected
BSU/PSP communication failures 3.5.2 BSU/PSP communication failures
10BASE-T/100BASE-TX/
1000BASE-T communication failure
3.5.3 Actions to be taken for 10BASE-T/
100BASE-TX/1000BASE-T problems
100BASE-FX/1000BASE-X
communication failure
3.5.4 Actions to be taken for 100BASE-FX/
1000BASE-X problems
10GBASE-R communication failure 3.5.5 Actions to be taken for 10GBASE-R/
40GBASE-R problems
Failures occurring when PoE is used 3.5.6 Actions to be taken for PoE problems
Link aggregation failure 3.5.7 Communication failures when link
aggregation is used
Layer 2 network
communication failures
VLAN failure 3.6.1 Layer 2 communication by VLANs is not
possible