Class ID

355 (hex), 853 (decimal)

Instance IDs

The RSTP Diagnostics object presents these instance values:

  • 0: class

  • 1... N: instance

Attributes

RSTP Diagnostics object attributes are associated with each instance.

Instance ID = 0 (class attributes):

Attribute ID

Description

Type

GET

SET

01

Revision: This attribute specifies the current revision of the RSTP Diagnostic object. The revision is increased by 1 at each new update of the object.

UINT

X

—

02

Max Instance: This attribute specifies the maximum number of instances that may be created for this object on a per device basis (for example, an RSTP bridge). There is 1 instance for each RSTP port on a device.

UINT

X

—

X = supported

— = not supported

Instance ID = 1 to N (instance attributes):

Attribute ID

Description

Type

GET

CLEAR

Value

01

Switch status

STRUCT of

X

—

—

Protocol specification

UINT

X

—

Refer to RFC-4188 for attribute definitions and value range. In addition, the following value is defined: [4]: the protocol is IEEE 802.1D-2004 and IEEE 802.1W.

Bridge priority

UDINT

X

—

Refer to RFC-4188 for attribute definitions and value range.

Time since topology change

UDINT

X

—

Topology change count

UDINT

X

—

Refer to RFC-4188 for attribute definitions and value range.

Designated root

String

X

—

Refer to RFC-4188 for attribute definitions and value range.

Root cost

UDINT

X

—

Root port

UDINT

X

—

Maximum age

UINT

X

—

Hello time

UINT

X

—

Hold time

UDINT

X

—

Forward delay

UINT

X

—

Bridge maximum age

UINT

X

—

Bridge hello time

UINT

X

—

Bridge forward delay

UINT

X

—

02

Port status

STRUCT

X

X

—

Port

UDINT

X

X

Refer to RFC-4188 for attribute definitions and value range.

Priority

UDINT

X

X

State

UINT

X

X

Enable

UINT

X

X

Path cost

UDINT

X

X

Designated root

String

X

X

Designated cost

UDINT

X

X

Designated bridge

String

X

X

Designated port

String

X

X

Forward transitions count

UDINT

X

X

Refer to RFC-4188 for attribute definitions and value range.

Services:

  • Get_and_Clear: The current value of this parameter is returned with the response message.

  • other services: The current value of this parameter is returned without being cleared.

03

Port mode

STRUCT of

X

—

—

Port number

UINT

X

—

This attribute indicates the port number for a data query. The value range is configuration-dependent. For a 4-port Ethernet device, as an instance, the valid range is 1...4.

Admin edge port

UINT

X

—

This attribute indicates if this is a user-configured edge port:

  • 1: true

  • 2: false

Other values are not valid.

Operartor edge port

UINT

X

—

This attribute indicates if this port is an edge port:

  • 1: true

  • 2: false

Other values are not valid.

Auto edge port

UINT

X

—

This attribute indicates if this port is a dynamically determined edge port:

  • 1: true

  • 2: false

Other values are not valid.

X = supported

— = not supported

Services

The RSTP Diagnostics object performs these services:

Service ID

Description

Class

Instance

Notes

hex

dec

01

01

Get_Attributes_All

X

X

This service returns:

  • all attributes of the class

  • all attributes of the instance of the object

02

02

Get_Attribute_Single

X

X

This service returns:

  • the contents of a single attribute of the class

  • the contents of the instance of the object as specified

Specify the attribute ID in the request for this service.

32

50

Get_and_Clear

—

X

This service returns the contents of a single attribute of the instance of the object as specified. Then the relevant counter-like parameters within the specified attribute are cleared. (Specify the attribute ID in the request for this service.)

X = supported

— = not supported