Hub/Switch Reference Guide

STP Commands 413
Nortel WLAN—Security Switch 2300 Series Command Line Reference
See Also show spantree blockedports on page 404
show spantree backbonefast
Indicates whether the STP backbone fast convergence feature is enabled or disabled.
Syntax show spantree backbonefast
Defaults None.
STP-State
or
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—This state can indicate any of the
following conditions:
• The port is inactive.
• The port is disabled.
• STP is enabled on the port but the port is not
forwarding traffic. (The port is active and
enabled but STP has just started to come up.)
• 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.
• STP Off—STP is disabled on the port.
Cost STP cost of the port.
Prio STP priority of the port.
Portfast State of the uplink fast convergence feature:
• Enabled
• Disabled
Table 2: Output for show spantree (continued)
Field Description