Troubleshooting guide

4. Troubleshooting Communication Failures Due to a Resource Shortage
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#: This message might be output with log message No. 1 in the above table.
If any of these log messages are output, you cannot set up any additional functions that use the
MAC address table. You must review your network configuration and change it so that the switch
can operate below the capacity limit.
In Nos. 2, 3, 4, and 6 in the above table, no entry was added to the MAC address table with the last
configuration command. In No. 5, no entry of the last authenticated terminal (Authentication
failed) was added to the MAC address table. To reconfigure the settings, follow these steps:
1. Review your configuration so that when in a later step you make more space available in the
table, MAC address learning, ARP/NDP learning, IEEE 802.1X, Web authentication, or
MAC-based authentication will not add any new entries to the MAC address table.
2. Delete the executed command (for Nos. 2, 3, 4, and 6 in the above table).
3. Make more space available in the MAC address table.
#
4. Re-execute the command (for Nos. 2, 3, 4, and 6 in the above table), or re-authenticate (for
No. 5).
#: You must delete some registered entries to make more space available in the MAC address table.
The following table lists the procedures for deleting various types of entries.
Table 4-3: How to delete MAC address table entries
9 Web authentication (fixed VLAN mode) The login failed because of hardware
restriction.
Note: This log message is displayed when the show
web-authentication logging
command is executed.
10 MAC-based authentication
The login failed because of hardware
restriction.
Note: This log message is displayed when the show
mac-authentication logging
command is executed.
No. Entry to be deleted Procedure
1 Learned MAC address Execute the
clear mac-address-table and clear
arp-cache
commands.
#1
2 Static MAC address
Static ARP/NDP
MAC address learning suppression
Execute the following configuration commands to clear the
configuration.
#2
• no mac-address-table static
• no arp
• no ipv6 neighbor
• mac-address table learning vlan
3 IEEE 802.1X Execute the clear dot1x auth-state command to cancel
authentication.
#1
4 MAC address for Ring Protocol • Execute the disable configuration command to disable the
Ring Protocol.
#2
• Execute any of the following configuration commands to
clear the configuration.
#2
- no axrp
- no axrp vlan-mapping
- no axrp-ring-port
- no control-vlan
- no mode
- no vlan-group
No. Trigger Log message