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Chapter 2
Messages and Recovery Procedures
causes the interface to be put into the blocking state and marked as root-guard inconsistent. The first
[chars] is the root-guard state (enable or disable), the second [chars] is the interface, and the third
[chars] is the spanning-tree instance.
Recommended Action
it is not the desired configuration; otherwise, no action is required.
Error Message SPANTREE-2-ROOTGUARD_UNBLOCK: Root guard unblocking port [chars] on
[chars].
Explanation
a superior root bridge (lower bridge ID, lower path cost, and so forth). The root-guard inconsistency
is cleared for the interface, and the blocking state is removed from the interface. The first [chars] is
the port name, and the second [chars] is the spanning-tree mode displayed in show spanning-tree
privileged EXEC command.
Recommended Action
Error Message SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking [chars] on [chars]. Port
consistency restored.
Explanation
resolved and spanning tree will unblock the listed interface of the listed spanning-tree instance as
appropriate. The first [chars] is the interface, and the second [chars] is the spanning-tree instance.
Recommended Action
Error Message SPANTREE-3-BAD_PORTNUM_SIZE: Rejected an attempt to set the port
number field size to [dec] bits (valid range is [dec] to [dec] bits).
Explanation
to request more or less bits than are possible. The spanning-tree port identifier is a 16-bit field,
which is divided evenly between the port priority and port number, with each subfield being 8 bits.
This allows the port number field to represent port numbers between 1 and 255. However, on
systems with more than 255 ports, the size of port number portion of the port ID must be increased
to support the number of ports. This is performed by the spanning-tree subsystem at system
initialization because the maximum number of ports on a particular platform will not change. This
error occurs because of an error in the platform-specific code, which causes it to request more or
less bits than are possible. The first [dec] is the number of bits for the port number, and the second
and third [dec] describe the valid range.
Recommended Action
Research and attempt to resolve the error by using the Output Interpreter. Enter the show version
user EXEC command to gather data that might help identify the nature of the error. Use the Bug
Toolkit to look for similar reported problems. If you still require assistance, open a case with the
TAC, or contact your Cisco technical support representative, and provide the representative with the
gathered information. For more information about these online tools and about contacting Cisco, see the
"Error Message Traceback Reports" section on page
OL-9641-01
Verify that this is the desired configuration for the listed interface. Correct it if
This message means that the listed interface is no longer receiving BPDUs advertising
No action is required.
This message means that the port VLAN ID or port type inconsistencies have been
No action is required.
This message means that an error occurred in the platform-specific code that caused it
Copy the message exactly as it appears on the console or in the system log.
Cisco ME 3400 and 2400 Ethernet Access Switch System Message Guide
SPANTREE Messages
1-4.
2-63
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