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Chapter 2
Messages and Recovery Procedures
Error Message SPAN-3-UNKN_ERR: An internal error occurred during a SPAN operation.
Error Message SPAN-3-UNKN_ERR_PORT: An internal error occurred when configuring SPAN
on port [chars].
SPANTREE Messages
This section contains the spanning-tree messages.
Error Message SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port [chars] with BPDU
Guard enabled. Disabling port.
Error Message SPANTREE-2-BLOCK_PVID_LOCAL: Blocking [chars] on [chars]. Inconsistent
local vlan.
OL-9641-01
Explanation
This message means that SPAN detected an error in its internal operation.
The error might be transient. Try the SPAN operation again. If a second attempt
Recommended Action
also fails, reload the switch by using the reload privileged EXEC command to complete the
operation.
This message means that SPAN detected an error in its internal operation. [chars] is the
Explanation
interface.
The error might be transient. Try the SPAN operation again. If the second
Recommended Action
attempt also fails, reload the switch by using the reload privileged EXEC command to complete the
operation.
Explanation
This message means that a bridge protocol data unit (BPDU) was received on an
interface that has the spanning tree BPDU guard feature enabled. As a result, the interface was
administratively shut down. [chars] is the interface name.
Recommended Action
Either remove the device sending BPDUs, or disable the BPDU guard feature.
The BPDU guard feature can be locally configured on the interface or globally configured on all
ports that have PortFast enabled. To disable BPDU guard on an interface, use the no spanning-tree
bpduguard enable interface configuration command. To disable BPDU guard globally, use the no
spanning-tree portfast bpduguard default global configuration command. After you have
removed the device or disabled BPDU guard, re-enable the interface by entering the no shutdown
interface configuration command.
This message means that the spanning-tree port associated with the listed spanning-tree
Explanation
instance and interface will be held in the spanning-tree blocking state until the port VLAN ID
(PVID) inconsistency is resolved. The listed spanning-tree instance is that of the native VLAN ID
of the listed interface. The first [chars] is the interface, and the second [chars] is the spanning-tree
instance.
Recommended Action
Verify that the configuration of the native VLAN ID is consistent on the
interfaces on each end of the 802.1Q trunk connection. When corrected, spanning tree automatically
unblocks the interfaces, as appropriate.
Cisco ME 3400 and 2400 Ethernet Access Switch System Message Guide
SPANTREE Messages
2-59
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