Spantree-3 - Cisco Catalyst 4500 Series Message Manual

SPANTREE Messages
Error Message SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking [char] on [char]. Port
consistency restored.

SPANTREE-3

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).
Error Message SPANTREE-3-PORT_SELF_LOOPED: [char] disabled.- received BPDU src mac
([mac-addr])
Error Message SPANTREE-3-PRESTD_NEIGH: pre-standard MST interaction not configured
([char]). Please
Catalyst 4500 Series Switch Cisco IOS System Message Guide Release 12.2(31)SGA
2-94
The port VLAN ID and/or port type inconsistencies have been resolved. The Spanning
Explanation
Tree Protocol will unblock the listed interface of the spanning tree instance. The interface ID is
[char].
This is an informational message only. No action is required.
Recommended Action
The spanning tree port identifier is a 16-bit field that is, by default, divided evenly
Explanation
between the port priority and the port number. Each subfield is 8 bits wide, allowing the port number
field to represent port numbers between 1 and 255. On systems with more than 255 ports, the STP
subsystem must increase the size of the port number portion of the port ID to support the greater
number of ports. This condition occurs 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 that caused it to request more (or fewer) bits than were possible.
Contact your technical support representative.
Recommended Action
same as that of interface
A BPDU with a source MAC address that matches the address assigned to the listed
Explanation
interface was received. A port looped back on itself, possibly due to a diagnostic cable that was
plugged into the interface. The interface is administratively shut down. [char] is the interface ID.
Check the interface configuration and any cable that is plugged into the
Recommended Action
interface. Once the problem is resolved, reenable the interface by entering the no shutdown
command on the interface.
The switch has received a pre-standard MST BPDU transmission on a port that is not
Explanation
configured for it. The switch will automatically adjust its mode of operation on this port and will
start sending pre-standard BPDUs. However, this auto-detection of pre-standard neighbors is not
100% accurate, and it is recommended to explicitly configure the port for pre-standard MST BPDU
transmission. This warning message is displayed only once.
Recommended Action Use the spanning-tree mst pre-standard configuration command on all ports
that are connected to switches running Cisco's pre-standard version of MST. Migrate all switches in
the network to the IEEE standard MST version when it is possible.
Chapter 2 Messages and Recovery Procedures
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