Troubleshooting guide

91
Index
1
1000BASE-T
troubleshooting, 26
1000BASE-X
troubleshooting, 27
100BASE-FX [AX1250S]
troubleshooting, 27
100BASE-TX
troubleshooting, 25, 26
10BASE-T
troubleshooting, 25, 26
A
administrator mode
forgotten password, 14
B
binding database
troubleshooting, 23
BPDUs sent from mirror port, 74
C
cannot be entered, 18
card
writing data to memory card, 81
commands
cannot be entered, 18
communication failures
in filtering and QoS configurations, 73
in high-reliability functionality based on
redundant configuration, 66
in IEEE 802.3ah/UDLD functionality, 72
in neighboring device management
functionality, 69
IPv4 network communication, 47
network interface troubleshooting, 24
SNM P, 68
troubleshooting when link aggregation used,
30
when IEEE 802.1X used, 50
when MAC-based authentication used, 59
when secure Wake-on-LAN used, 63
when uplink redundancy used, 66
when Web authentication used, 54
console
cannot input or display info, 15
operation terminal problems, 15
copying or writing information to memory card
not possible, 19
D
detailed display contents
show tech-support command, 84
show tech-support command, 84
DHCP snooping
troubleshooting, 37
E
error information
how to obtain, 79
Ethernet port
troubleshooting, 24
F
failure analysis
for entire or part of Switch, 3
overview, 1, 2
failure information
how to obtain, 79
obtaining, 80
when long-life solution is supported, 77
failures
login-related problem, 14
Spanning Tree functionality used, 34
troubleshooting, 9
troubleshooting procedure, 10
when DHCP snooping functionality used, 37
when Ring Protocol functionality used, 36
filtering
checking, 73
FTP
transferring files, 82
functional failure analysis
overview, 5
functional failures during operation
troubleshooting, 13
I
IEEE 802.1X
troubleshooting communication failures, 50
IEEE 802.3ah/UDLD
troubleshooting, 72
IGMP snooping
with multicast forwarding, 42
IPv4 network communication
failures, 47
L
Layer 2 authentication communication
failures, 50
Layer 2 communication
troubleshooting for VLANs, 32
Layer 2 network communication
failures, 32
LEDs
brightness control disabled, 75
LLDP functionality
cannot obtain neighboring device
information, 69
login
forgotten password, 14