Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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
Execute the show vlan mac-vlan command and make sure the MAC address set for a VLAN
by using the Layer 2 authentication functionality has not been set for another VLAN in the
configuration. In the example below, the MAC address indicated with an asterisk (
*) is
disabled because the address has also been set in the configuration.
# show vlan mac-vlan
:
VLAN ID:500 MAC Counts:4
0012.e200.aa01 (static)
0012.e200.aa02 (static)
0012.e200.aa03 (static) 0012.e200.aa04 (dot1x)
VLAN ID:600 MAC Counts:1
* 0012.e200.aa01 (dot1x)
(2) Checking the port status
 Execute the show vlan command with the detail parameter and make sure the port status is
Up. If the status is Down, see 3.5 Network interface communication failures.
 Make sure the port status is Forwarding. If it is Blocking, the cause is indicated in
parentheses. Check the status of the functionality that caused the problem.
[Cause]
VLAN: Suspend is specified for the VLAN.
CH: Transfer has been suspended by the link aggregation functionality.
STP: Transfer has been suspended by the Spanning Tree functionality.
GSRP: Transfer has been suspended by GSRP.
dot1x: Transfer has been suspended by the IEEE 802.1X functionality.
CNF: Transfer has been suspended because the configuration cannot be set.
AXRP: Transfer has been suspended by Ring Protocol.
# show vlan detail
:
VLAN ID:100 Type:Protocol based Status:Up
:
Port Information
0/1 Up Forwarding Untagged
0/2 Up Forwarding
Tagged
(3) Checking the MAC address table
(a) Checking the status of MAC address learning
 Execute the show mac-address-table command and check the information about the
destination MAC address that caused the communication failure.
# show mac-address-table
MAC address VLAN Type Port-list
0012.e22c.650c
10 Dynamic 0/1
0012.e22c.650b 1 Dynamic 0/2
 Take one of the actions described below according to the value displayed for Type.
When Dynamic is displayed for Type:
The MAC address learning information might not have been updated. Use the clear
mac-address-table command to clear the old information. Information can also be
updated by sending frames from the destination device.
When Static is displayed for Type:
Use the mac-address-table static configuration command to check the destination