H3C SOHO IE4300, Command Reference Manual

Page: 475 / 3296

10
Related commands
reset stp
display stp abnormal-port
Use display stp abnormal-port to display history about ports that are blocked by spanning
tree protection features.
Syntax
display stp abnormal-port
Views
Any view
Predefined user roles
network-admin
network-operator
Usage guidelines
In an MSTI or VLAN, this command can display a maximum of three history records for a port that is
blocked by spanning tree protection features.
Examples
# In MSTP mode, display history about ports that are blocked by spanning tree protection features.
---[GigabitEthernet1/0/1]---
MST ID BlockReason Time
0 Root-Protected 14:39:04 04/15/2016
0 Root-Protected 14:39:02 04/15/2016
0 Root-Protected 14:39:00 04/15/2016
# In PVST mode, display history about ports that are blocked by spanning tree protection features.
---[GigabitEthernet1/0/1]---
VLAN ID BlockReason Time
1 Root-Protected 14:49:17 04/15/2016
1 Root-Protected 14:49:15 04/15/2016
1 Root-Protected 14:49:12 04/15/2016
Table 4 Command output
Field Description
MST ID MSTI of a blocked port.
VLAN ID VLAN of a blocked port.
BlockReason
Reason that the port was blocked:
•
Root-Protected —Root guard feature.
•
Loop-Protected —Loop guard feature.
•
Loopback-Protected —Self-loop protection. A port in the MSTI receives a
BPDU sent by itself.
•
Disputed —Dispute guard. A port receives a low-priority BPDU from a
non-blocked designated port in forwarding or learning state.
•
InconsistentPortType-Protected —Inconsistent port type protection.
•
InconsistentPvid-Protected —Inconsistent PVID protection.
Time Protection feature trigger time.