System information

247
DWS-1008 CLI Reference Guide
D-Link Systems, Inc.
STP Commands
Output for show spantree statistics
Field Description
Port Port number.
VLAN VLAN ID.
Spanning Tree enabled for vlan State of the STP feature on the VLAN.
port spanning tree State of the STP feature on the port.
state STP state of the port:
• Blocking - The port is not forwarding
Layer 2 traffic but is listening to and
forwarding STP control traffic.
• Disabled - The port is not forwarding
any traffic, including STP control traffic.
The port might be administratively
disabled or the link might be
disconnected.
• Forwarding - The port is forwarding
Layer 2 traffic.
• Learning - The port is learning the
locations of other devices in the
spanning tree before changing state to
forwarding.
• Listening - The port is comparing its
own STP information with information
in STP control packets received by the
port to compute the spanning tree and
change state to blocking or forwarding.
port_id STP port ID.
port_number STP port number.
path cost Cost to use this port to reach the root
bridge. This is part of the total path cost
(designated cost).
message age Age of the protocol information for a
port and the value of the maximum
age parameter (shown in parenthesis)
recorded by the switch.
designated_root MAC address of the root bridge.
designated cost Total path cost to reach the root bridge.
designated_bridge Bridge to which this switch forwards
traffic away from the root bridge.
designated_port STP port through which this switch
forwards traffic away from the root bridge.