3Com WX4400 Command Reference Manual page 449

Table 71 Output for display spantree statistics
Field
Port
VLAN
Spanning Tree enabled
for vlan
port spanning tree
state
port_id
port_number
path cost
message age
designated_root
designated cost
designated_bridge
designated_port
top_change_ack
Description
Port number.
VLAN ID.
State of the STP feature on the VLAN.
State of the STP feature on the port.
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
WX switches 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.
STP port ID.
STP port number.
Cost to use this port to reach the root bridge. This is part
of the total path cost (designated cost).
Age of the protocol information for a port and the value of
the maximum age parameter (shown in parenthesis)
recorded by the switch.
MAC address of the root bridge.
Total path cost to reach the root bridge.
Bridge to which this switch forwards traffic away from the
root bridge.
STP port through which this switch forwards traffic away
from the root bridge.
Value of the topology change acknowledgment flag in the
next configured bridge protocol data unit (BPDU) to be
transmitted on the associated port. The flag is set in reply
to a topology change notification BPDU.
display spantree statistics 449