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XG2000 series User's Guide
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All Rights Reserved, Copyright (C) PFU LIMITED 2009
z Link Type
Indicates the state of the current link.
− Point-to-point
A point-to-point link.
− Shared
A shared link.
z Forward-Transitions
Displays the number of times the port changed to forwarding state.
z Portfast
The Portfast state is displayed.
− Disabled
The Portfast function is disabled.
− Enabled
The Portfast function is enabled.
z Portfast bpdu-guard
The state of the BPDU guard function is displayed.
− Disabled
The BPDU guard function is disabled.
− Enabled
The BPDU guard function is enabled.
z Portfast bpdu-filter
The state of the BPDU filter function is displayed.
− Disabled
The BPDU filter function is disabled.
− Enabled
The BPDU filter function is enabled.
BPDU Parameter
Displays the information about the BPDU send/receive.
This is only displayed when the "STP State" of the specified port is not "Down".
z Designated Path Cost
The root path cost to the destination port is displayed.
z Designated Port ID
The Port ID of the destination port is displayed.
z Designated Priority
The priority value of the destination port is displayed,
z Designated Root ID
The switch identifier of the root switch registered in the destination switch is displayed.
The first four digits representing the priority of the root switch are displayed as a
hexadecimal number. The remaining 12 digits representing the MAC address of the root switch
are displayed as a hexadecimal number.
z Designated Switch ID
The switch identifier of the destination switch is displayed.
The first four digits representing the priority of the designated switch are displayed as
a hexadecimal number.
If the "Designated Root ID" and the "Designated Switch ID" are the same, the destination
switch is the root switch.
z Max Age
The maximum valid time (seconds) for BPDU's for the destination switch is displayed.
z Message Age
Displays the time (seconds) lapsed since the last BPDU message from the destination switch
was received.
z Message Age Timer
Displays the timeout value (seconds) for BPDU messages sent form the destination switch.
z Hello Time
Displays the hello time (seconds) sent from the destination switch.
z Hello Timer
Displays the remaining seconds for the Hello Timer. When it decrements to 0, a BPDU is sent.
z Forward Time
Displays the Forward Time (seconds) sent from the destination switch.
z Forward Timer
Displays the remaining seconds for the Forward Timer. When it decrements to 0, the status
of the port is changed.
z Received STP Protocol
Displays the Spanning Tree Protocol (STP) mode of the destination switch.
− STP
The connection destination switch is operating in STP (IEEE 802.1D) mode.
− RSTP
The connection destination switch is operating in RSTP (IEEE 802.1w) mode.
− None
STP is not enabled on the destination switch.
Example
Displays the detailed information for the Spanning Tree Protocol state:
xg# show spanning-tree detail