HP PROCURVE 2520, Management And Configuration Manual

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Troubleshooting
Unusual Network Activity
For more help, refer to the documentation provided with your
server application.
Unknown Users Allowed to Login to the Switch. Your appli­
cation may be configured to allow access to unknown users by assigning them
the privileges included in a
default user
profile. Refer to the documentation
provided with your server application.
System Allows Fewer Login Attempts than Specified in the Switch
Configuration.
Your server application may be configured to
allow fewer login attempts than you have configured in the switch with the
aaa authentication num-attempts command.
TimeP, SNTP, or Gateway Problems
The Switch Cannot Find the Time Server or the Configured Gateway .
TimeP, SNTP, and Gateway access are through the primary VLAN, which in
the default configuration is the DEFAULT_VLAN. If the primary VLAN has
been moved to another VLAN, it may be disabled or does not have ports
assigned to it.
VLAN-Related Problems
None of the devices assigned to one or more VLANs on an 802.1Q­
compliant switch are being recognized.
If multiple VLANs are being used
on ports connecting 802.1Q-compliant devices, inconsistent VLAN IDs may
have been assigned to one or more VLANs. For a given VLAN, the same VLAN
ID must be used on all connected 802.1Q-compliant devices.
Link Configured for Multiple VLANs Does Not Support Traffic for One
or More VLANs.
One or more VLANs may not be properly configured as
“Tagged” or “Untagged”. A VLAN assigned to a port connecting two 802.1Q­
compliant devices must be configured the same on both ports. For example,
VLAN_1 and VLAN_2 use the same link between switch “X” and switch “Y”.
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