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MIB Reference

S7700 and S9700 V200R011C10

This document provides the function overview, relationships between tables, description of single objects, description of MIB tables, and description of alarm objects.
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BRIDGE-MIB

BRIDGE-MIB

Functions Overview

RFC 4188 defines BRIDGE-MIB. This MIB describes information about bridges, such as bridge status and path cost for you to query and set and attributes of bridge ports and transparent bridge ports for you to query. Through this MIB, you can modify priorities of STP ports and attributes of specified bridges and ports.

The OID of root objects is:

iso(1).org(3).dod(6).internet(1).mgmt(2).mib-2(1).dot1dBridge(17)

Relationship Between Tables

Figure 5-1  Relationship between dot1dBasePortTable, dot1dStpPortTable, and dot1dTpPortTable

Figure 5-1 shows the relationship between dot1dBasePortTable (bridge port table), dot1dStpPortTable (STP port table), and dot1dTpPortTable (transparent bridge table). The indices of three tables, that is, port numbers, correspond to each other.

Description of Single Objects

dot1dBaseBridgeAddress

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.1.1

dot1dBaseBridgeAddress

MacAddress

Read-only

This object identifies the MAC address of the bridge.

This object is implemented as defined in the corresponding MIB files.

dot1dBaseNumPorts

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.1.2

dot1dBaseNumPorts

Integer32

Read-only

The number of ports controlled by this device entity.

This object is implemented as defined in the corresponding MIB files.

dot1dBaseType

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.1.3

dot1dBaseType

INTEGER {

unknown(1),

transparent-only(2),

sourceroute-only(3),

srt(4)

}

Read-only

The value of this object identifies the type of the bridge.
  • 1: unknown
  • 2: transparent-only
  • 3: sourceroute-only
  • 4: srt

Currently, the product only supports transparent-only type.

This object is implemented as defined in the corresponding MIB files.

dot1dStpPriority

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.2

dot1dStpPriority

Integer32

(0..65535)

Read-write

This object indicates the STP priority.

This object is implemented as defined in the corresponding MIB files.

dot1dStpTimeSinceTopologyChange

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.3

dot1dStpTimeSinceTopologyChange

TimeTicks

Read-only

This object indicates the time when the STP topology changes.

This object is implemented as defined in the corresponding MIB files.

dot1dStpDesignatedRoot

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.5

dot1dStpDesignatedRoot

BridgeId

Read-only

This object indicates the ID of the root bridge of STP.

This object is implemented as defined in the corresponding MIB files.

dot1dStpRootCost

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.6

dot1dStpRootCost

Integer32

Read-only

The cost of the path to the root as seen from this bridge.

This object is implemented as defined in the corresponding MIB files.

dot1dStpRootPort

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.7

dot1dStpRootPort

Integer32

Read-only

This object identifies the internal port ID of the root port on the bridge.

This object is implemented as defined in the corresponding MIB files.

dot1dStpMaxAge

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.8

dot1dStpMaxAge

Timeout

Read-only

The value of this object identifies the maximum aging time of the switch, namely, the BPDU aging time of the port.

This object is implemented as defined in the corresponding MIB files.

dot1dStpHelloTime

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.9

dot1dStpHelloTime

Timeout

Read-only

The value of this object identifies the Hello timer of STP.

This object is implemented as defined in the corresponding MIB files.

dot1dStpHoldTime

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.10

dot1dStpHoldTime

Timeout

Read-only

The value of this object identifies the Hold timer of STP.

This object is read-only and the value is fixed to be 0.

dot1dStpForwardDelay

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.11

dot1dStpForwardDelay

Timeout

Read-only

This object indicates STP forwarding delay.

This object is implemented as defined in the corresponding MIB files.

dot1dStpBridgeMaxAge

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.12

dot1dStpBridgeMaxAge

Timeout (600..4000)

Read-write

The value of this object identifies the maximum valid time of the bridge configuration.

This object is implemented as defined in the corresponding MIB files.

dot1dStpBridgeHelloTime

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.13

dot1dStpBridgeHelloTime

Timeout (100..1000)

Read-write

The value of this object identifies the Hello timer of the bridge.

This object is implemented as defined in the corresponding MIB files.

dot1dStpBridgeForwardDelay

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.14

dot1dStpBridgeForwardDelay

Timeout (400..3000)

Read-write

The value of this object identifies the forwarding delay of the bridge.

This object is implemented as defined in the corresponding MIB files.

dot1dTpLearnedEntryDiscards

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.4.1

dot1dTpLearnedEntryDiscards

Counter32

Read-only

This object indicates the total number of discarded FDB instances.

Currently, only the value 0 can be read.

dot1dTpAgingTime

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.4.2

dot1dTpAgingTime

Integer32(0|60..1000000)

Read-write

The value of this object identifies the aging time of the MAC address.

The value is 0 or an integer ranging from 60 to 1000000. The value 0 indicates the MAC address aging is not supported.

Description of MIB Tables

dot1dBasePortTable

This table describes basic configuration of device ports, limitation of received frames, and the statistics about the discarded frames.

The index of this table is dot1dBasePort.

NOTE:
Modular switches do not support the following MIB objects:
  • 1.3.6.1.2.1.17.1.4.1.3 dot1dBasePortCircuit

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.1.4.1.1

dot1dBasePort

Integer32(1..65535)

Read-only

The value of this object identifies the port number of the device.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.1.4.1.2

dot1dBasePortIfIndex

InterfaceIndex

Read-only

The value of this object identifies the port index in the port table.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.1.4.1.3

dot1dBasePortCircuit

OBJECT IDENTIFIER

read-only

For a port that (potentially) has the same value of dot1dBasePortIfIndex as another port on the same bridge.

Currently, the return value 0 is supported only.

Creation Restriction

This table cannot be created.

Modification Restriction

This table cannot be modified.

Deletion Restriction

This table cannot be deleted.

Access Restriction

The table has records only when the Layer 2 ports exist.

dot1dStpPortTable

This table describes the attributes of ports on the devices running STP.

The index of this table is dot1dStpPort.

OID

Object Name

Syntax

Max Access

Description

Implemented Specifications

1.3.6.1.2.1.17.2.15.1.1

dot1dStpPort

Integer32 (1..65535)

Read-only

The value of this object identifies the port number.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.2

dot1dStpPortPriority

Integer32 (0..255)

Read-write

The value of this object identifies the priority of a port.

The priority of a port determines whether the port can be a root port. In the spanning tree algorithm, in the case of equal conditions, the port with a higher priority is selected to be a root port.

The value of the priority is contained in the first byte of the port ID in the network byte order. The rest bytes of the port ID is the number of the STP port.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.3

dot1dStpPortState

INTEGER {

disabled(1),

blocking(2),

listening(3),

learning(4),

forwarding(5),

broken(6)

}

Read-only

The value of this object identifies the current status of a port.

If the device detects a port that is faulty, it places the port into the broken state.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.4

dot1dStpPortEnable

INTEGER {

enabled(1),

disabled(2)

}

Read-write

The enabled/disabled status of the port.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.5

dot1dStpPortPathCost

Integer32 (1..65535)

Read-write

The value of this object identifies the path cost of the port.

By default, the path cost of a port is determined by the transmission rate on the link connecting the bridge to the port.
  • Huawei legacy standard: 1 to 200000
  • IEEE 802.1D standard: 1 to 65535
  • IEEE 802.1t standard: 1 to 200000000

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.6

dot1dStpPortDesignatedRoot

BridgeId

Read-only

This object indicates the root bridge.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.7

dot1dStpPortDesignatedCost

Integer32

Read-only

The value of this object identifies the cost of the path from the designated port to the root bridge.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.8

dot1dStpPortDesignatedBridge

BridgeId

Read-only

This object indicates the designated bridge of the port.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.9

dot1dStpPortDesignatedPort

OCTET STRING(SIZE(2))

Read-only

This object indicates the designated port of the device.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.10

dot1dStpPortForwardTransitions

Counter32

Read-only

This object indicates the number of times the port transitions from the Learning state to the Forwarding state.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.2.15.1.11

dot1dStpPortPathCost32 Integer32 (1..200000000)

Read-write

The value of this object identifies the path cost of the port.

By default, the path cost of a port is determined by the transmission rate on the link connecting the bridge to the port.
  • Huawei legacy standard: 1 to 200000
  • IEEE 802.1D standard: 1 to 65535
  • IEEE 802.1t standard: 1 to 200000000

This object is implemented as defined in the corresponding MIB files.

Creation Restriction

This table cannot be created.

Modification Restriction

The entries in this table can be modified.

Deletion Restriction

This table cannot be deleted.

Access Restriction

The table has records only when the Layer 2 ports exist.

dot1dTpPortTable

This table describes information about the transparent bridge such as port number.

The index of this table is dot1dTpPort.

OID

Object Name

Syntax

Access

Description

Implemented Specifications

1.3.6.1.2.1.17.4.4.1.1

dot1dTpPort

Integer32 (1..65535)

Read-only

This object indicates the port number of the transparent bridge.

This object is implemented as defined in the corresponding MIB files.

1.3.6.1.2.1.17.4.4.1.2

dot1dTpPortMaxInfo

Integer32

Read-only

This object indicates the maximum size of the INFO (non-MAC) field that this port transceives.

This object is implemented as defined in the corresponding MIB files.

Creation Restriction

This table cannot be created.

Modification Restriction

This table cannot be modified.

Deletion Restriction

This table cannot be deleted.

Access Restriction

The table has records only when the Layer 2 ports exist.

dot1dTpFdbTable

This table obtains all MAC address entries.

The index of this table is dot1dTpFdbAddress.

OID

Object Name

Syntax

Maximum Access

Description

Access

1.3.6.1.2.1.17.4.3.1.1

dot1dTpFdbAddress

MacAddress

Read-only

This object indicates a MAC address entry.

Current

1.3.6.1.2.1.17.4.3.1.2

dot1dTpFdbPort

Integer32

Read-only

This object indicates the outbound interface information.

Current

1.3.6.1.2.1.17.4.3.1.3

dot1dTpFdbStatus

INTEGER

Read-only

This object indicates the type of a MAC address entry.

  • 1: other(1)
  • 2: invalid(2)
  • 3: learned(3)
  • 4: self(4)
  • 5: mgmt(5)

Current

Creation Restriction

No entry can be created in this table.

Modification Restriction

No entry in this table can be modified.

Deletion Restriction

No entry in this table can be deleted.

Access Restriction

The entries in this table can be read without restriction.

Description of Alarm Objects

newRoot

OID

Object Name

Bound Variable

Description

Status

1.3.6.1.2.1.17.0.1

newRoot

-

If a bridge is selected as a new root bridge in the spanning tree network, the bridge sends a newRoot trap to the NMS.

This object is implemented as defined in the corresponding MIB files.

topologyChange

OID

Object Name

Bound Variable

Description

Implemented Specifications

1.3.6.1.2.1.17.0.2

topologyChange

-

When a port converts between the learning/discarding state and the forwarding state, the bridge where the port resides sends a topologyChange trap to the NMS.

When the port converts from forwarding state to blocking state, the topologyChange trap is not sent.

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Updated: 2019-10-17

Document ID: EDOC1000178290

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