PRVT-SPANNING-TREE-MIB

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Organization: BATM Advanced Communication

Last Updated: 2010-04-06

Category: Spanning Tree

Description: Manages BATM Advanced Communication spanning tree protocol configuration, bridge priority, and per-port STP parameters.

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What Is PRVT-SPANNING-TREE-MIB?

PRVT-SPANNING-TREE-MIB is a private vendor MIB, associated with BATM Advanced Communications equipment, for managing the Spanning Tree Protocol (and a related 'fast ring' protocol) on the device's bridging ports. It exposes bridge-level STP parameters (max age, hello time, forward delay, bridge priority), topology-change tracking (time since last topology change, topology change count), and per-port STP configuration and BPDU transmission status. This is a network-status monitoring MIB whose main hardware/software relevance is detecting topology instability: a rising prvtStTopChanges counter or a recent prvtStTimeSinceTopologyChange value signals a flapping link or a loop-related re-convergence event. It builds directly on the concepts of the standard IEEE 802.1D/802.1w Spanning Tree Protocol, adapting them into the vendor's private OID tree alongside the vendor's proprietary fast-ring redundancy feature. It would be deployed on BATM's Ethernet/metro switching platforms in networks relying on STP-based loop prevention, where PRVT-SPANNING-TREE-MIB SNMP monitoring helps operators catch topology instability early.

IPNetwork Monitor allows you to monitor SNMP objects defined in PRVT-SPANNING-TREE-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

BATM Advanced Communications Ethernet/metro switches

Monitoring Examples

An operator would poll prvtStTopChanges and prvtStTimeSinceTopologyChange at the bridge level to detect unexpected spanning-tree recalculations, then drill into prvtStPortTable/prvtStPortEntry (indexed by prvtStPortIfName) to check prvtStPortBpduTx and prvtStPortRowStatus on specific ports to identify which port is generating excessive BPDU traffic or repeatedly toggling. A sudden jump in topology-change count combined with a specific port's high BPDU transmit rate would point to a flapping uplink or a misconfigured redundant path.

What Can Be Monitored

spanning tree topology change count
time since last topology change
bridge priority/timers
per-port BPDU transmission
per-port STP row status

Imported Objects

From IF-MIB

ifIndex

OBJECT-TYPE

From PRVT-SWITCH-MIB

switch

OBJECT-IDENTITY

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
prvtSpanningTreeMIB	1.3.6.1.4.1.738.1.5.107			The private MIB module for management of the spanning tree and fast ring protocols.
prvtStNotifications	1.3.6.1.4.1.738.1.5.107.0
NTF stTopologyChange	1.3.6.1.4.1.738.1.5.107.0.1			A topologyChange trap is sent by a bridge when any of its configured ports transitions from the Learning state to the Forwarding state, or from the Forwarding state to the Blocking state. The trap is not sent if a newRoot trap is sent for the same transition. Implementation of this trap is optional.
NTF stNewRoot	1.3.6.1.4.1.738.1.5.107.0.2			The newRoot trap indicates that the sending agent has become the new root of the Spanning Tree; the trap is sent by a bridge soon after its election as the new root, e.g., upon expiration of the Topology Change Timer, immediately subsequent to its election. Implementation of this trap is optional.
NTF mstTopologyChange	1.3.6.1.4.1.738.1.5.107.0.3			A topologyChange trap is sent by a bridge when any of its configured ports transitions from the Learning state to the Forwarding state, or from the Forwarding state to the Blocking state. The trap is not sent if a newRoot trap is sent for the same transition. Implementation of this trap is optional.
NTF mstNewRoot	1.3.6.1.4.1.738.1.5.107.0.4			The newRoot trap indicates that the sending agent has become the new root of the MSTP; the trap is sent by a bridge soon after its election as the new root, e.g., upon expiration of the Topology Change Timer, immediately subsequent to its election. Implementation of this trap is optional.
prvtStObjects	1.3.6.1.4.1.738.1.5.107.1
prvtStCommon	1.3.6.1.4.1.738.1.5.107.1.1
INT prvtStProviderBridgeAddress	1.3.6.1.4.1.738.1.5.107.1.1.1	INTEGER	read-write	Chose wich standard - 802.1d or 802.1ad will be used for BPDUs
U32 prvtStMaxAge	1.3.6.1.4.1.738.1.5.107.1.1.2	Unsigned32	read-write	The maximum age, in seconds, of Spanning Tree Protocol information learned from the network on any port before it is discarded. Note that the following relationships are enforced: prvtStMaxAge >= 2 x (prvtStHelloTime + 1) 2 x (prvtStForwardDelay - 1) >= prvtStMaxAge
U32 prvtStHelloTime	1.3.6.1.4.1.738.1.5.107.1.1.3	Unsigned32	read-write	The amount of time, in seconds, between the transmission of Configuration bridge PDUs by this node on any port when it is the root of the spanning tree or trying to become so. Note that the following relationship is enforced: prvtStMaxAge >= 2 x (prvtStHelloTime + 1)
U32 prvtStForwardDelay	1.3.6.1.4.1.738.1.5.107.1.1.4	Unsigned32	read-write	The amount of time in seconds to delay before entering forwarding state. Note that the following relationship is enforced: 2 x (prvtStForwardDelay - 1) >= prvtStMaxAge
PRV prvtStPriority	1.3.6.1.4.1.738.1.5.107.1.1.5	PrvtStBridgePriorityTC	read-write	The bridge priority. Valid values are multiples of 4096.
U32 prvtStTimeSinceTopologyChange	1.3.6.1.4.1.738.1.5.107.1.1.6	Unsigned32	read-only	The time, in seconds, since last topology change.
U32 prvtStTopChanges	1.3.6.1.4.1.738.1.5.107.1.1.7	Unsigned32	read-only	The total number of topology changes detected.
prvtStPortTable	1.3.6.1.4.1.738.1.5.107.1.1.8		not-accessible	A table containing port specific configuration information for the spanning-tree protocols.
prvtStPortEntry	1.3.6.1.4.1.738.1.5.107.1.1.8.1		not-accessible	An entry in prvtStPortTable.
OCT prvtStPortIfName	1.3.6.1.4.1.738.1.5.107.1.1.8.1.1	OCTET STRING	read-only	RowStatus for prvtStPortTable
ROW prvtStPortRowStatus	1.3.6.1.4.1.738.1.5.107.1.1.8.1.2	RowStatus	read-create	RowStatus for prvtStPortTable
T/F prvtStPortBpduTx	1.3.6.1.4.1.738.1.5.107.1.1.8.1.3	TruthValue	read-create	Enable transmission of BPDUs on this port.
T/F prvtStPortBpduRx	1.3.6.1.4.1.738.1.5.107.1.1.8.1.4	TruthValue	read-create	Configures how BPDUs received by the port should be processed.
T/F prvtStPortDetectBpduLoss	1.3.6.1.4.1.738.1.5.107.1.1.8.1.5	TruthValue	read-create	Enable detection of BPDU loss.
T/F prvtStPortCiscoCompliant	1.3.6.1.4.1.738.1.5.107.1.1.8.1.6	TruthValue	read-create	Configure this port to be Cisco compliant.
T/F prvtStPortEdge	1.3.6.1.4.1.738.1.5.107.1.1.8.1.7	TruthValue	read-create	Set port as an edge-port. Note that ring ports can not be set as edge ports.
T/F prvtStPortEdgeStatus	1.3.6.1.4.1.738.1.5.107.1.1.8.1.8	TruthValue	read-only	Whether this port is currently operating as an edge port.
T/F prvtStPortEdgeFlush	1.3.6.1.4.1.738.1.5.107.1.1.8.1.9	TruthValue	read-create	Flush edge port when blocking.
PRV prvtStPortLinkType	1.3.6.1.4.1.738.1.5.107.1.1.8.1.10	PrvtStLinkTypeTC	read-create	Configure the link type for this port.
PRV prvtStPortLinkTypeStatus	1.3.6.1.4.1.738.1.5.107.1.1.8.1.11	PrvtStLinkTypeTC	read-only	The current link type status for this port.
T/F prvtStPortRestrictedRoot	1.3.6.1.4.1.738.1.5.107.1.1.8.1.12	TruthValue	read-create	Enable root restriction on this port. Note that ring ports can not have restricted root enabled.
T/F prvtStPortRestrictedTcn	1.3.6.1.4.1.738.1.5.107.1.1.8.1.13	TruthValue	read-create	Enable topology change notification (TCN) restriction on this port. Note that ring ports can not have restricted TCN enabled.
U32 prvtStPortPathCost	1.3.6.1.4.1.738.1.5.107.1.1.8.1.14	Unsigned32	read-create	Configure the path cost for this port.
PRV prvtStPortPriority	1.3.6.1.4.1.738.1.5.107.1.1.8.1.15	PrvtStPortPriorityTC	read-create	Set port priority. Valid values are multiples of 16.
T/F prvtStPortAdminStatus	1.3.6.1.4.1.738.1.5.107.1.1.8.1.16	TruthValue	read-create	Enable or disable spanning-tree on this port. Note that ring ports can not be set to disabled.
PRV prvtStPortState	1.3.6.1.4.1.738.1.5.107.1.1.8.1.17	PrvtStPortStateTC	read-only	The current state of this port.
PRV prvtStPortRole	1.3.6.1.4.1.738.1.5.107.1.1.8.1.18	PrvtStPortRoleTC	read-only	The current role for this port.
U32 prvtStPortDesPCost	1.3.6.1.4.1.738.1.5.107.1.1.8.1.19	Unsigned32	read-only	The designated path cost for this port.
OCT prvtStPortDesBridgeID	1.3.6.1.4.1.738.1.5.107.1.1.8.1.20	OCTET STRING	read-only	The designated bridge ID for this port.
PRV prvtStPortDesPortID	1.3.6.1.4.1.738.1.5.107.1.1.8.1.21	PrvtStPortIdTC	read-only	The designated port ID for this port.
U32 prvtStTxHoldCount	1.3.6.1.4.1.738.1.5.107.1.1.9	Unsigned32	read-write	TxHoldCount is the value used by the Port Transmit state machine to limit the maximum transmission rate.
PRV prvtStLearnMode	1.3.6.1.4.1.738.1.5.107.1.1.10	PrvtStLearnModeTC	read-write	Specify learning of new MACs on non-edge ports
prvtStStp	1.3.6.1.4.1.738.1.5.107.1.2
T/F prvtStStpProtocolDisabled	1.3.6.1.4.1.738.1.5.107.1.2.1	TruthValue	read-write	Enable STP protocol. Note that only one flavour of xSTP can be running at a time (i.e. only one of prvtStStpProtocolDisabled, prvtStRstpProtocolDisabled, prvtStMstpProtocolDisabled, prvtStFRingProtocolDisabled can be true at a time.
prvtStRstp	1.3.6.1.4.1.738.1.5.107.1.3
T/F prvtStRstpProtocolDisabled	1.3.6.1.4.1.738.1.5.107.1.3.1	TruthValue	read-write	Enable RSTP protocol. Note that only one flavour of xSTP can be running at a time (i.e. only one of prvtStStpProtocolDisabled, prvtStRstpProtocolDisabled, prvtStMstpProtocolDisabled, prvtStFRingProtocolDisabled can be true at a time.
prvtStMstp	1.3.6.1.4.1.738.1.5.107.1.4
T/F prvtStMstpProtocolDisabled	1.3.6.1.4.1.738.1.5.107.1.4.1	TruthValue	read-write	Enable MSTP protocol. Note that only one flavour of xSTP can be running at a time (i.e. only one of prvtStStpProtocolDisabled, prvtStRstpProtocolDisabled, prvtStMstpProtocolEnable, prvtStFRingProtocolDisabled can be true at a time.
OCT prvtStMstpRegionName	1.3.6.1.4.1.738.1.5.107.1.4.2	OCTET STRING	read-write	The configuration name of the MST region to which this bridge belongs.
U32 prvtStMstpRegionRevision	1.3.6.1.4.1.738.1.5.107.1.4.3	Unsigned32	read-write	MST region revision.
U32 prvtStMstpMaxHops	1.3.6.1.4.1.738.1.5.107.1.4.4	Unsigned32	read-write	Maximum number of hops for the MST region.
U32 prvtStMstpMigrationDelay	1.3.6.1.4.1.738.1.5.107.1.4.6	Unsigned32	read-only	The Migration Delay timer in seconds.
prvtStMstpInstTable	1.3.6.1.4.1.738.1.5.107.1.4.8		not-accessible	This table contains MST instance information.
prvtStMstpInstEntry	1.3.6.1.4.1.738.1.5.107.1.4.8.1		not-accessible	An entry in prvtStMstpInstTable.
PRV prvtStMstpInstId	1.3.6.1.4.1.738.1.5.107.1.4.8.1.1	PrvtStInstIdExceptZeroTC	not-accessible	An MST instance identifier.
ROW prvtStMstpInstRowStatus	1.3.6.1.4.1.738.1.5.107.1.4.8.1.2	RowStatus	read-create	RowStatus entry for prvtStMstpInstTable.
PRV prvtStMstpInstPriority	1.3.6.1.4.1.738.1.5.107.1.4.8.1.3	PrvtStBridgePriorityTC	read-create	The bridge priority for this MST instance. Valid values are multiples of 4096.
U32 prvtStMstpInstTimeSinceTopChng	1.3.6.1.4.1.738.1.5.107.1.4.8.1.4	Unsigned32	read-only	The time in seconds since the last time a topology change was detected for this MST instance.
U32 prvtStMstpInstTopChanges	1.3.6.1.4.1.738.1.5.107.1.4.8.1.5	Unsigned32	read-only	The total number of topology changes detected for this MST instance.
prvtStMstpInstStatTable	1.3.6.1.4.1.738.1.5.107.1.4.9		not-accessible	This table contains additional MST instance status information.
prvtStMstpInstStatEntry	1.3.6.1.4.1.738.1.5.107.1.4.9.1		not-accessible	An entry in prvtStMstpInstStatTable.
OCT prvtStMstpInstStatRRootID	1.3.6.1.4.1.738.1.5.107.1.4.9.1.2	OCTET STRING	read-only	The regional root ID for this MST instance.
U32 prvtStMstpInstStatRemHopCount	1.3.6.1.4.1.738.1.5.107.1.4.9.1.3	Unsigned32	read-only	The remaining hop count for this MST instance.
prvtStMstpVlanPerInstTable	1.3.6.1.4.1.738.1.5.107.1.4.10		not-accessible	Defines the mapping of VLANs to Spanning Tree instances.
prvtStMstpVlanPerInstEntry	1.3.6.1.4.1.738.1.5.107.1.4.10.1		not-accessible	An entry in prvtStMstpVlanPerInstTable.
U32 prvtStMstpVlanPerInstVlanId	1.3.6.1.4.1.738.1.5.107.1.4.10.1.1	Unsigned32	not-accessible	VLAN identifier
ROW prvtStMstpVlanPerInstRowStatus	1.3.6.1.4.1.738.1.5.107.1.4.10.1.2	RowStatus	read-create	RowStatus for prvtStMstpVlanPerInstTable.
PRV prvtStMstpVlanPerInstMstId	1.3.6.1.4.1.738.1.5.107.1.4.10.1.3	PrvtStInstIdTC	read-create	The MST instance to which this VLAN belongs.
prvtStMstpInstPortTable	1.3.6.1.4.1.738.1.5.107.1.4.12		not-accessible	A table containing configuration information regarding a specific port for a given MST instance.
prvtStMstpInstPortEntry	1.3.6.1.4.1.738.1.5.107.1.4.12.1		not-accessible	An entry in prvtStMstpInstPortTable.
PRV prvtStMInstPortInstId	1.3.6.1.4.1.738.1.5.107.1.4.12.1.2	PrvtStInstIdExceptZeroTC	read-create	Instance ID
ROW prvtStMInstPortRowStatus	1.3.6.1.4.1.738.1.5.107.1.4.12.1.3	RowStatus	read-create	RowStatus for prvtStMstpInstPortTable
U32 prvtStMInstPortPathCost	1.3.6.1.4.1.738.1.5.107.1.4.12.1.4	Unsigned32	read-create	The path cost for this MST instance port.
PRV prvtStMInstPortPriority	1.3.6.1.4.1.738.1.5.107.1.4.12.1.5	PrvtStPortPriorityTC	read-create	The port priority for this MST instance port. Valid values are multiples of 16.
T/F prvtStMInstPortAdminStatus	1.3.6.1.4.1.738.1.5.107.1.4.12.1.6	TruthValue	read-create	Enable or disable spanning-tree for this MST instance port.
PRV prvtStMInstPortState	1.3.6.1.4.1.738.1.5.107.1.4.12.1.7	PrvtStPortStateTC	read-only	The current state of this MST instance port.
U32 prvtStMInstPortFwdTrans	1.3.6.1.4.1.738.1.5.107.1.4.12.1.8	Unsigned32	read-only	The number of transitions from Learning state to Forwarding state that have been made for this MST instance port.
PRV prvtStMInstPortStatRole	1.3.6.1.4.1.738.1.5.107.1.4.12.1.9	PrvtStPortRoleTC	read-only	The current role for this MST instance port.
U32 prvtStMInstPortDesPCost	1.3.6.1.4.1.738.1.5.107.1.4.12.1.10	Unsigned32	read-only	The designated port path cost.
OCT prvtStMInstPortDesBridgeID	1.3.6.1.4.1.738.1.5.107.1.4.12.1.11	OCTET STRING	read-only	The designated bridge ID.
PRV prvtStMInstPortDesPortID	1.3.6.1.4.1.738.1.5.107.1.4.12.1.12	PrvtStPortIdTC	read-only	The designated port ID.
prvtStFRing	1.3.6.1.4.1.738.1.5.107.1.5
T/F prvtStFRingProtocolDisabled	1.3.6.1.4.1.738.1.5.107.1.5.1	TruthValue	read-write	Enable fast ring protocol. Note that only one flavour of xSTP can be running at a time (i.e. only one of prvtStStpProtocolDisabled, prvtStRstpProtocolDisabled, prvtStMstpProtocolEnable, prvtStFRingProtocolDisabled can be true at a time. Setting prvtStFRingProtocolDisabled to true will fail if prvtStFRingInstTable is empty.
OCT prvtStFRingPrefLink	1.3.6.1.4.1.738.1.5.107.1.5.2	OCTET STRING	read-write	Specify preferred fast ring port
prvtStFRingInstTable	1.3.6.1.4.1.738.1.5.107.1.5.3		not-accessible	Each row in the table defines an instance of a fast ring. Currently only one instance is supported. An attempt to create more than one instance will fail. While prvtStFRingProtocolDisabled is true (i.e. fast-ring protocol is enabled), there must exist at least one row in this table. An attempt to delete the only existing row in this table will fail while prvtStFRingProtocolDisabled is true.
prvtStFRingInstEntry	1.3.6.1.4.1.738.1.5.107.1.5.3.1		not-accessible	An entry in prvtStFRingInstTable.
OCT prvtStFRingInstPort1	1.3.6.1.4.1.738.1.5.107.1.5.3.1.1	OCTET STRING	not-accessible	The first ring port belonging to the fast ring. prvtStFRingInstPort1 must exist in prvtStPortTable. prvtStFRingInstPort1 must not equal prvtStFRingInstPort2.
OCT prvtStFRingInstPort2	1.3.6.1.4.1.738.1.5.107.1.5.3.1.2	OCTET STRING	not-accessible	The second ring port belonging to the fast ring. prvtStFRingInstPort2 must exist in prvtStPortTable. prvtStFRingInstPort1 must not equal prvtStFRingInstPort2.
ROW prvtStFRingInstRowStatus	1.3.6.1.4.1.738.1.5.107.1.5.3.1.3	RowStatus	read-create	RowStatus entry for prvtStFRingInstTable.

RFC description

Telco Systems proprietary MIB for spanning tree protocol management. Monitors spanning tree topology, port states, and rapid spanning tree operations on network switches through SNMP.

Start monitoring BATM Advanced Communications Ethernet/metro switches (Spanning Tree/fast ring) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download PRVT-SPANNING-TREE-MIB

What Is PRVT-SPANNING-TREE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description