Allied Telesis 2.6.1 manual Do not occur

Layer 2 Switching 91

Table 18: Parameters in the output of the SHOW STP command .

Parameter	Meaning
STP Name	The name of the Spanning Tree Protocol entity.
Mode	Whether STP is running in standard, or rapid mode.
RSTP Type	Whether RSTP is operating normally, or as STP compatible.
	In STP compatible mode, the rapid transitions to forwarding
	do not occur.
VLAN members	A list of the VLANs that are members of the STP. VLAN
	Identifiers are shown in brackets.
Status	The status of the STP; either ON or OFF.
Number of Ports	The number of ports belonging to the STP.
Number Enabled	The number of ports that have been enabled using the
	ENABLE STP command and are being considered by the
	Spanning Tree Algorithm.
Number Disabled	The number of ports that have been disabled using the
	DISABLE STP command and are not being considered by the
	Spanning Tree Algorithm.
Bridge Identifier	The unique Bridge Identifier of the switch. This parameter
	consists of two parts, one of which is derived from the
	unique Switch Address, and the other of which is the
	priority of the switch.
Bridge Priority	The settable priority component that permits the relative
	priority of bridges to be managed. The range of values is
	between 0 and 65535. A lower number indicates a higher
	priority.
Designated Root	The unique Bridge Identifier of the bridge assumed to be
	the root, (Standard Mode only).
Root Bridge	The unique Bridge Identifier of the bridge assumed to be
	the Root, (Rapid Mode only).
Designated Bridge	The unique Bridge Identifier of the bridge assumed to be
	the designated bridge. Displayed when STP is set to RAPID
	mode, (Rapid Mode only).
Root Port	The port number of the root port for the switch. If the
	switch is the Root Bridge this parameter is not valid, and
	(n/a) is shown.
Root Path Cost	The cost of the path to the Root from this switch. If the
	switch is the Root Bridge this parameter is not valid and is
	not shown.
Max Age	The maximum age of received Configuration Message
	information before it is discarded.
Hello Time	The time interval between successive transmissions of the
	Configuration Message information by a switch which is
	the Root or which is attempting to become the Root.
Forward Delay	In STP Standard mode, the time ports spend in the Listening
	state before moving to the Learning state and the Learning
	state before moving to the Forwarding state. In Rapid
	mode, the maximum time taken to transition from
	Discarding to Learning and Learning to Forwarding. In both
	modes, the value is also used for the ageing timer for the
	dynamic entries in the Forwarding Database.

Software Release 2.6.1 C613-02039-00 REV A