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Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter System Message Guide
OL-12191-01
Chapter 2 Message and Recovery Procedures
SPANTREE Messages
Error Message
SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on [chars]
[chars].
Explanation
The listed interface received an SSTP 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.
Recommended Action
If this message recurs, copy the message exactly as it appears on the console
or in the system log. Research and attempt to resolve the error by using the Output Interpreter. Use
the Bug Toolkit to look for similar reported problems. If you still require assistance, contact IBM
technical support and provide the representative with the gathered information. For more
information about the online tools and about contacting IBM, see the
Error Message
SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id
[dec] on [chars] [chars].
Explanation
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 IEEE 802.1Q trunk. [dec] is the VLAN ID, the first
[chars] is the port, and the second [chars] is the VLAN.
Recommended Action
Verify that the configurations of the native VLAN ID is consistent on the
interfaces on each end of the IEEE 802.1Q trunk connection. When the configurations are
consistent, spanning tree automatically unblocks the interfaces.
Error Message
SPANTREE-2-ROOTGUARD_BLOCK: Root guard blocking port [chars] on
[chars].
Explanation
On the listed interface, a BPDU was received that advertises a superior spanning-tree
root bridge (lower bridge ID, lower path cost, and so forth) than that in use. The interface is put into
blocking state and marked as
root-guard inconsistent
to prevent a suboptimal spanning-tree
topology from forming. The first [chars] is the port name, and the second [chars] is the spanning-tree
mode displayed in the output of the
show spanning-tree
privileged EXEC command.
Recommended Action
Enter the
show spanning-tree inconsistentports
privileged EXEC command
to review the list of interfaces with root-guard inconsistencies. Find out why devices connected to
the listed ports are sending BPDUs with a superior root bridge, and take action to prevent more
occurrences. When the inaccurate BPDUs have been stopped, the interfaces automatically recover
and resume normal operation. Make sure that it is appropriate to have root guard enabled on the
interface.
