Layer 2 Switching

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Table 19: Parameters displayed in the output of the SHOW STP PORT command .

Parameter

Meaning

 

 

STP

The name of the STP that the port is a member of.

 

 

STP Status

Whether this STP is enabled or disabled; one of ON or OFF.

 

 

Port

The number of the port.

 

 

RSTP Port Role

The role of the port; one of Disabled, Alternate, Backup,

 

Designated, or Root. (Rapid Mode only).

 

 

State

The state of the port; one of “Disabled”, “Blocking”,

 

“Listening”, “Learning” or “Forwarding” for Standard

 

mode, and one of; “Disabled”, “Discarding”, “Learning”,

 

or “Forwarding” for Rapid mode.

 

 

Point To Point

Whether the port has a point to point connection with

 

another bridge; one of NO or YES. (Rapid Mode only).

 

 

Port Priority

The priority of the port. Used as part of the Port Identifier

 

field. In Standard mode it forms the upper 8 bits of the Port

 

Identifier field. In Rapid mode it forms the upper 4 bits of

 

the Port Identifier field.

 

 

Port Identifier

The unique identifier of the port. This parameter is used to

 

determine the root port or designated port of the switch.

 

 

Pathcost

The path cost of the port.

 

 

Designated Root

The unique Bridge Identifier of the Root Bridge, as recorded

 

in the configuration BPDU.

 

 

Designated Cost

The Designated Cost for the port.

 

 

Designated Bridge

Either the unique Bridge Identifier of the switch, or the

 

unique Bridge Identifier of the switch believed to be the

 

Designated Bridge for the LAN to which the port is

 

attached.

 

 

Designated Port

The Port Identifier of the port on the Designated Bridge

 

through which the Designated Bridge transmits

 

Configuration BPDU information stored by this port.

 

 

Edge Port

An edge port is a port that attaches to a LAN that is known

 

to have no other bridges attached; one of YES, or NO.

 

 

The spanning tree algorithm can be recalculated at any time, and all timers and counters be initialised, using the command:

RESET STP={stpnameALL}

To show STP counters, use the command:

SHOW STP[={stpnameALL}] COUNTER

Software Release 2.6.1 C613-02039-00 REV A

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Allied Telesis 2.6.1 manual To show STP counters, use the command