Brocade TurboIron 24X Series Configuration Guide User Manual
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Brocade TurboIron 24X Series Configuration Guide
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Configuring standard STP parameters
Root Cost
The cumulative cost from this bridge to the root bridge. If this device is the root
bridge, then the root cost is 0.
Root Port
The port on this device that connects to the root bridge. If this device is the root
bridge, then the value is “Root” instead of a port number.
Priority Hex
This device or VLAN STP priority. The value is shown in hexadecimal format.
NOTE: If you configure this value, specify it in decimal format. Refer to
Max age sec
The number of seconds this device or VLAN waits for a configuration BPDU from
the root bridge before deciding the root has become unavailable and performing a
reconvergence.
Hello sec
The interval between each configuration BPDU sent by the root bridge.
Hold sec
The minimum number of seconds that must elapse between transmissions of
consecutive Configuration BPDUs on a port.
Fwd dly sec
The number of seconds this device or VLAN waits following a topology change and
consequent reconvergence.
Last Chang sec
The number of seconds since the last time a topology change occurred.
Chg cnt
The number of times the topology has changed since this device was reloaded.
Bridge Address
The STP address of this device or VLAN.
NOTE: If this address is the same as the Root ID, then this device or VLAN is the
root bridge for its spanning tree.
Port STP parameters
Port Num
The port number.
Priority Hex
The port STP priority, in hexadecimal format.
NOTE: If you configure this value, specify it in decimal format. Refer to
Path Cost
The port STP path cost.
State
The port 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 FORWARDING state, depending on the results of STP
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.
Fwd Trans
The number of times STP has changed the state of this port between BLOCKING
and FORWARDING.
TABLE 88
CLI display of STP information (Continued)
This field...
Displays...