Cisco Gigabit Ethernet Switch Module for HP p-Class BladeSystem System Message Guide

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Cisco Gigabit Ethernet Switch Module for the HP p-Class BladeSystem System Message Guide
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Chapter 2 Message and Recovery Procedures
SPANTREE Messages
loopguard-inconsistent to prevent possible loops from being created. The first [chars] is the port
name, and the second [chars] is the spanning-tree mode displayed in 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 loopguard inconsistencies. Find out why devices connected to
the listed ports are not sending BPDUs. One reason might be that they are not running the STP. If
so, you should disable loop guard on the inconsistent interfaces by using the spanning-tree guard
none interface configuration command or by starting the STP on the remote side of the links.
Error Message SPANTREE-2-LOOPGUARD_CONFIG_CHANGE: Loop guard [chars] on port [chars]
on [chars].
Explanation This message means that the spanning-tree loopguard configuration for the listed
interface has been changed. If enabled, the interface is placed into the blocking state. It is marked
as loopguard-inconsistent when the message-age timer expires because no BPDUs were received
from the designated bridge. This feature is mainly used to detect unidirectional links. The first
[chars] is the loopguard state (enable or disable), the second [chars] is the interface name, and the
third [chars] is the spanning-tree instance.
Recommended Action Verify that this is the desired configuration for the listed interface. Correct it if
this is not the desired configuration.
Error Message SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port [chars] on
[chars].
Explanation This message means that the listed interface has received a BPDU. If the inconsistency
was caused by a unidirectional link failure, the problem no longer exists. The
loopguard-inconsistency is cleared for the interface, which is taken out of the blocking state, if
appropriate. The first [chars] is the port name, and the second [chars] is the spanning-tree mode
displayed in the show spanning-tree privileged EXEC command.
Recommended Action No action is required.
Error Message SPANTREE-2-PVSTSIM_FAIL: Blocking [chars] port [chars]: Inconsistent
[chars] PVST BPDU received on VLAN [dec], claiming root [dec]:[enet]
Explanation This message means that the specified port on the multiple spanning-tree (MST) switch
is blocked. When a designated port on an MST switch is connected to a PVST+ switch, the CIST
(MST00) information on the port of the MST switch must be consistently superior (lower bridge ID,
lower path cost, and so forth) to the information in all the PVST+ messages. If the port is the root,
the CIST (MST00) information on the MST switch must be consistently inferior to all the PVST+
messages. If this constraint is violated, the port on the MST switch is blocked to prevent a potential
bridging loop. The first [chars] is the MST switch, the second [chars] is the port, and the third [chars]
is the PVST+ switch. The first [dec] is the VLAN ID, the second [dec] is the MST switch, and [enet]
is the MST-switch MAC address.
Recommended Action When STP converges after a new switch or switch port is added to the topology,
the port might temporarily be blocked and then automatically restored. If the port remains blocked,
identify the root bridge as reported in the message, and configure the appropriate priority for the
VLAN spanning tree, consistent with the CIST role on the port of the MST switch.