HP 9304m Installation And Getting Started Manual page 174

The show span detail command shows the following information.
Table 6.6: CLI Display of Detailed STP Information for Ports
This Field...
Port number and VLAN ID
STP state
Port path cost
Port priority
Designated root ID
Designated bridge ID
Designated port
Designated port path cost
Timers
Displays...
The port number and the VLAN the port belongs to.
The port's STP state. 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 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.
The port's STP path cost.
This port's STP priority. The value is shown as a hexadecimal
number.
The ID assigned by STP to the root bridge for this spanning tree.
The MAC address of the designated bridge to which this port is
connected. The designated bridge is the device that connects the
network segment on the port to the root bridge.
The port number sent from the designated bridge.
The cost to the root bridge as advertised by the designated bridge that
is connected to this port. If the designated bridge is the root bridge
itself, then the cost is 0. The identity of the designated bridge is
shown in the Design Bridge field.
The current values for the following timers:
• Message age – The number of seconds this port has been
waiting for a hello message from the root bridge.
• Forward delay – The number of seconds that have passed since
the last topology change and consequent reconvergence.
• Hold time – The number of seconds that have elapsed since
transmission of the last Configuration BPDU.
Configuring Spanning Tree Protocol (STP)
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