User`s manual

379
DWS-1008 User’s Manual
D-Link Systems, Inc.
Appendix A - Troubleshooting
Client cannot access
the network.
This symptom has
more than one
possible cause:
• The client
might be failing
authentication
or might not be
authorized for a
VLAN.
1. Type the show aaa
command to ensure that
the authentication rules on
the switch allow the client to
authenticate.
2. Check the authorization rules
in the switch’s local database
(show aaa) or on the
RADIUS servers to ensure
the client is authorized to join
a VLAN that is congured on
the switch.
• If the client
and switch
congurations
are correct, a
VLAN might be
disconnected. A
client connected
to a disconnected
VLAN is unable
to access the
network.
1. Type the show vlan cong
command to check the status
of each VLAN.
2. If a VLAN is disconnected
(VLAN state is Down), check
the network cables for the
VLAN’s ports. At least one
of the ports in a VLAN must
have a physical link to the
network for the VLAN to be
connected.
Conguration
information
disappears after a
software reload.
The conguration
changes were not
saved.
1. Retype the commands for
the missing conguration
information.
2. Type the save cong
command to save the
changes.
Mgmt LED is quickly
blinking amber.
CLI stops at boot
prompt (boot>).
The switch was
unable to load the
system image le.
Type the boot command at the
boot prompt.