Cisco Intelligent Gigabit Ethernet Switch Module Manual page 36

SPANTREE-2-PVSTSIM_FAIL: Superior PVST BPDU received on VLAN [dec] port [chars], claiming root [dec]:[enet].
Invoking root guard to block the port.
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Explanation This message means that when a per-VLAN spanning-tree plus PVST+) switch is
connected to a Multiple Spanning Tree Protocol (MSTP) switch, the internal spanning-tree (IST) root
(MST00) becomes the root for all PVST+ spanning trees. A loop might be created if any of the PVST+
spanning trees have a better root than the IST. To prevent the loop, the port on the MSTP switch that
receives the superior message from the PVST+ side is blocked by root guard. The first [dec] is the VLAN
number, [chars] is the port name, and [dec]:[enet] is the priority and MAC address.
Response When STP is converging after a new switch or switch port is added to the topology, this
condition might happen transiently, and the port automatically unblocks in these cases. If the port remains
blocked, identify the root bridge as reported in the message, and configure a priority for the VLAN
spanning tree so that it is not selected as the root. There could be other superior PVST+ roots (lower
bridge ID, lower path cost, and so forth) than the message shows, and the port does not recover until all
such roots are cleared. If you are unsure, disable and re-enable the port.
SPANTREE-2-RECV-1Q-NON-1QTRUNK: Received 802.1Q BPDU on non 802.1Q trunk [chars] [chars].
Explanation This message means that the listed interface on which a Shared Spanning Tree Protocol
(SSTP) BPDU was received was in trunk mode but was not using 802.1Q encapsulation. The first [chars]
is the port, and the second [chars] is the VLAN.
Response Verify that the configuration and operational state of the listed interface and that of the
interface to which it is connected are in the same mode (access or trunk). If the mode is trunk, verify that
both interfaces have the same encapsulation (ISL or 802.1Q). If the encapsulation types are different, use
the switchport trunk encapsulation interface configuration command to make them consistent. When
the encapsulation is consistent, spanning tree automatically unblocks the interface.
SPANTREE-2-RECV-BAD-TLV: Received SSTP BPDU with bad TLV on [chars] [chars].
Explanation This message means that the listed interface received a Shared Spanning Tree Protocol
(SSTP) bridge protocol data unit (BPDU) without the VLAN ID tag. The BPDU is discarded. The first
[chars] is the port, and the second [chars] is the VLAN that received the SSTP BPDU.
Response If the message recurs, find out more about the error by using the show tech-support privileged
EXEC command and by copying the error message exactly as it appears on the console or system log and
entering it in the Output Interpreter tool. Use the Bug Toolkit to look for similar reported problems. For more
information about these online tools , see the "Error Message Traceback Reports" section on page 9.
SPANTREE-2-RECV-PVID-ERR: Received BPDU with inconsistent peer vlan id [dec] on [chars] [chars].
Explanation This message means that the listed interface received an SSTP BPDU that is tagged with
a VLAN ID that does not match the VLAN ID on which the BPDU was received. This occurs when the
native VLAN is not consistently configured on both ends of an 802.1Q trunk. [dec] is the VLAN ID, the first
[chars] is the port, and the second [chars] is the VLAN.
Response Verify that the configurations of the native VLAN ID are consistent on the interfaces on each
end of the 802.1Q trunk connection. When the configurations are consistent, spanning tree automatically
unblocks the interfaces.
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Cisco Systems Intelligent Gigabit Ethernet Switch Module for the IBM Eserver BladeCenter System Message Guide