Specifications
12-22 STP Commands
Related Commands
showspantreeblockedportsonpage 12‐24
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 12-2 Output for show spantree (continued)
Output What It Displays...