RSTP Diagnostics Object
Original instructions
About us
Overview
The RSTP Diagnostics object presents the instances, attributes and services described below.
Class ID
355 (hex), 853 (decimal)
Instance IDs
The RSTP Diagnostics object presents these instance values:
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
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
—
Max Age
UINT
X
—
Hello Time
UINT
X
—
Hold Time
UDINT
X
—
Forward Delay
UINT
X
—
Bridge Max 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
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.
Oper Edge Port
UINT
X
—
This attribute indicates if this port is currently 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 parameter(s) within the specified attribute are cleared. (Specify the attribute ID in the request for this service.)
X = supported
— = not supported