Stacking-Related Problems; Tacacs-Related Problems - HP Procurve 2650 Management And Configuration Manual

Troubleshooting
Unusual Network Activity
C-16
A key in the file is too long. The maximum key length is 1024 characters,
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including spaces. This could also mean that two or more keys are merged
together instead of being separated by a <CR><LF>.
I There are more than ten public keys in the key file.
One or more keys in the file is corrupted or is not a valid rsa public key.
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Client ceases to respond ("hangs") during connection phase. The
switch does not support data compression in an SSH session. Clients will
often have compression turned on by default, but will disable it during the
negotiation phase. A client which does not recognize the compression-request
FAILURE response may fail when attempting to connect. Ensure that com-
pression is turned off before attempting a connection to prevent this problem.

Stacking-Related Problems

The Stack Commander Cannot Locate any Candidates. Stacking oper-
ates on the primary VLAN, which in the default configuration is the
DEFAULT_VLAN. However, if another VLAN has been configured as the
primary VLAN, and the Commander is not on the primary VLAN, then the
Commander will not detect Candidates on the primary VLAN.

TACACS-Related Problems

Event Log. When troubleshooting TACACS+ operation, check the switch's
Event Log for indications of problem areas.
All Users Are Locked Out of Access to the Switch. If the switch is func-
tioning properly, but no username/password pairs result in console or Telnet
access to the switch, the problem may be due to how the TACACS+ server
and/or the switch are configured. Use one of the following methods to recover:
Access the TACACS+ server application and adjust or remove the
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configuration parameters controlling access to the switch.
If the above method does not work, try eliminating configuration
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changes in the switch that have not been saved to flash (boot-up
configuration) by causing the switch to reboot from the boot-up
configuration (which includes only the configuration changes made
prior to the last
write memory
to save the authentication configuration to flash, then pressing the
Reset button or cycling the power reboots the switch with the boot-
up configuration.
command.) If you did not use
write memory