
XG700 User's Guide
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All Rights Reserved, Copyright (C) PFU LIMITED 2005-2006
Switch Information for Spanning Tree
Spanning Tree Protocol information on switch in general is displayed.
Spanning Tree
The operation state of Spanning Tree Protocol is displayed.
−
Disabled
Spanning Tree Protocol is disabled.
−
Enabled
Spanning Tree Protocol is enabled.
Root Switch Priority
The priority of the switch selected as the root switch is displayed in a decimal number.
Root Switch ID
The switch identifier selected as the root switch is displayed.
In the first four digits, the priority of the root switch is displayed in a hexadecimal number.
In the remaining 12 digits, the MAC address of the root switch is displayed in a hexadecimal number.
Root Path Cost
The path cost value from the XG700 to the root switch.
When the XG700 is the root switch, "0" is displayed.
Root Port
The switch port number of the root port of the XG700 is displayed.
When the XG700 is the root switch, "---" is displayed.
Switch Priority
The priority of the XG700 is displayed in a decimal number.
Switch ID
The switch identifier priority of the XG700 is displayed.
In the first four digits, the priority of the XG700 is displayed in a hexadecimal number.
In the remaining 12 digits, the MAC address of the XG700 is displayed in a hexadecimal number.
Max Age
The maximum valid time (seconds) of BPDU is displayed.
Hello Time
The transmit interval (seconds) of BPDU is displayed.
Forward Time
The time that a port needs to switch the state.
Topology Changes
The number of times of topology changes is displayed.
Last Topology Change
The latest date and time of topology change is displayed.
portfast errdisable timeout
At potfast port, the state of errdisable-timeout function is displayed.
−
disabled
The errdisable-timeout function is disabled.
−
enabled
The errdisable-timeout function is enabled.
portfast errdisable timeout interval
The interval (seconds) to cancel port down when the errdisable-timeout function is enabled is displayed.
Ports Information for Spanning Tree
Spanning Tree Protocol information for each switch port is displayed.
Port
The switch port number is displayed.
Port State
The state of the switch port by STP (Spanning Tree Protocol) is displayed.
−
Down
Indicates that the switch port is in link down state.
−
Discard
The switch port does not send/receive frames other than BPDUs.
−
Learn
The switch port is in learning state. The source MAC address of received frames learns, but frames are not
forwarded.
−
Forward
Shows the switch port is ready to transmit data traffic.
In RSTP (IEEE802.1w), "Blocking" and "Listening" states of STP are integrated to "Discarding." The port states of STP
(IEEE802.1D) and RSTP (IEEE802.1w) correspond as follows:
Display
format
STP(IEEE802.1D)
RSTP(IEEE802.1w)
Block Blocking
Discarding
Listen Listening
Discarding
Learn Learning
Learning
Forward Forwarding
Forwarding
For a switch port that does not use STP, the state will be either "Forward" or "Down."