The authorized MAC address on a port that is configured for both 802.1X and port security either
changes or is re-acquired after execution of aaa port-access authenticator <port-list>
initialize.....................................................................................................................................377
A trunked port configured for 802.1X is blocked..........................................................................377
QoS-related problems.......................................................................................................................377
Loss of communication when using VLAN-tagged traffic.............................................................377
Radius-related problems...................................................................................................................377
The switch does not receive a response to RADIUS authentication requests...................................377
RADIUS server fails to respond to a request for service, even though the server's IP address is correctly
configured in the switch..............................................................................................................377
MSTP and fast-uplink problems........................................................................................................378
Broadcast storms appearing in the network...................................................................................378
STP blocks a link in a VLAN even though there are no redundant links in that VLAN....................378
Fast-uplink troubleshooting.........................................................................................................378
SSH-related problems......................................................................................................................379
Switch access refused to a client..................................................................................................379
Executing IP SSH does not enable SSH on the switch...................................................................379
Switch does not detect a client's public key that does appear in the switch's public key file (show ip
client-public-key).......................................................................................................................379
An attempt to copy a client public-key file into the switch has failed and the switch lists one of the
following messages.....................................................................................................................379
Client ceases to respond ("hangs") during connection phase..........................................................379
TACACS-related problems...............................................................................................................380
Event Log..................................................................................................................................380
All users are locked out of access to the switch.............................................................................380
No communication between the switch and the TACACS+ server application.................................380
Access is denied even though the username/password pair is correct..............................................380
Unknown users allowed to login to the switch..............................................................................381
System allows fewer login attempts than specified in the switch configuration................................381
TimeP, SNTP, or Gateway problems..................................................................................................381
The switch cannot find the time server or the configured gateway..................................................381
VLAN-related problems...................................................................................................................381
Monitor port...............................................................................................................................381
None of the devices assigned to one or more VLANs on an 802.1Q-compliant switch are being
recognized.................................................................................................................................381
Link configured for multiple VLANs does not support traffic for one or more VLANs....................381
Duplicate MAC addresses across VLANs.....................................................................................382
Disabled overlapping subnet configuration...................................................................................382
Fan failure.......................................................................................................................................383
Mitigating flapping transceivers........................................................................................................384
Fault finder thresholds................................................................................................................385
Enabling fault finder using the CLI.........................................................................................385
Viewing transceiver information.............................................................................................................388
Viewing information about transceivers (CLI)....................................................................................389
MIB support....................................................................................................................................389
Viewing transceiver information.......................................................................................................389
Information displayed with the detail parameter............................................................................391
Viewing transceiver information for copper transceivers with VCT support.........................................394
18 HPE ArubaOS-Switch Management and Configuration Guide for RA.16.02