Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 431)

Multi-Service IronWare Switching Configuration Guide 401
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show spanning-tree
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Hello sec The interval between each configuration BPDU sent by the root bridge.
FwdDly sec The number of seconds this root bridge waits following a topology change and
consequent reconvergence.
Port STP Parameters
Port Num The port number.
Priority The port’s STP priority.
NOTE: If you configure this value, specify it in decimal format.
Path Cost The port’s STP path cost.
State 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 bridges 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.
Design Cost 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.
Designated Root The root bridge as recognized on this port. The value is the same as the root bridge ID
listed in the Root ID field.
Designated Bridge The bridge as recognized on this port.
Output field Description