HP ProCurve 9304M Installation And Configuration Manual page 222

Installation and Basic Configuration Guide
Table 8.6: CLI Display of Detailed STP Information for Ports (Continued)
This Field...
Active global timers
Port number and STP state
Port Path cost
Port Priority
8 - 16
Displays...
The global STP timers that are currently active, and their current
values. The following timers can be listed:
• Hello – The interval between Hello packets. This timer applies
only to the root bridge.
• Topology Change (TC) – The amount of time during which the
topology change flag in Hello packets will be marked, indicating a
topology change. This timer applies only to the root bridge.
• Topology Change Notification (TCN) – The interval between
Topology Change Notification packets sent by a non-root bridge
toward the root bridge. This timer applies only to non-root
bridges.
The internal port number and the port's STP state.
The internal port number is one of the following:
• The port's interface number, if the port is the designated port for
the LAN.
• The interface number of the designated port from the received
BPDU, if the interface is not the designated port for the LAN.
The state can be one of the following:
• BLOCKING – STP has blocked Layer 2 traffic on this port to
prevent a loop. The device or VLAN can reach the root bridge
using another port, whose state is FORWARDING. When a port
is in this state, the port does not transmit or receive user frames,
but the port does continue to receive STP BPDUs.
• DISABLED – The port is not participating in STP. This can occur
when the port is disconnected or STP is administratively disabled
on the port.
• FORWARDING – STP is allowing the port to send and receive
frames.
• LISTENING – STP is responding to a topology change and this
port is listening for a BPDU from neighboring bridge(s) in order to
determine the new topology. No user frames are transmitted or
received during this state.
• LEARNING – The port has passed through the LISTENING state
and will change to the BLOCKING or FORWARDING state,
depending on the results of STP's reconvergence. The port does
not transmit or receive user frames during this state. However,
the device can learn the MAC addresses of frames that the port
receives during this state and make corresponding entries in the
MAC table.
Note: If the state is DISABLED, no further STP information is
displayed for the port.
The port's STP path cost.
This port's STP priority. The value is shown as a hexadecimal
number.