TN-XSTP-MIB

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Organization: Transition Networks, Inc.

Last Updated: 2012-07-06

Category: Link Layer and Ethernet Protocols, Switch and Bridge Management, Transition Networks Media Converters

Description: Manages Transition Networks STP, RSTP, and MSTP spanning tree configuration and port roles.

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What Is TN-XSTP-MIB?

TN-XSTP-MIB is a Transition Networks vendor extension MIB that augments the standard spanning-tree MIBs to manage Common Spanning Tree, Rapid STP, and Multiple STP (MSTP) behavior on Transition Networks' managed Ethernet switches. It exposes configuration data such as per-instance MSTP CIST (Common and Internal Spanning Tree) parameters, VLAN-to-MSTI mapping bitmaps, and per-port CIST settings, along with notification objects for spanning-tree events. Administrators use it to monitor and control loop-prevention behavior in the switch's software, including BPDU filtering and BPDU guard status and port recovery timeout after an error condition, revealing whether ports are protected from, or have been shut down due to, spanning-tree violations. As an extension MIB it has a direct dependency on the IEEE 802.1 standard bridge/spanning-tree MIBs that it supplements rather than replaces. It is typically deployed on Transition Networks managed Ethernet switches in industrial or enterprise LANs requiring loop protection. Engineers can download the TN-XSTP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in TN-XSTP-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

Transition Networks managed Ethernet switch

Monitoring Examples

An admin would query tnExtMstpCistPortTable/tnExtMstpCistEntry to check per-port CIST role and state, and inspect tnExtMstpCistBpduGuard together with tnExtMstpCistRecoveryTimeout to see whether a port was disabled after an unexpected BPDU and how long before it recovers. Walking tnExtMstpTable/tnExtMstpEntry with the tnExtMstpVids0-3 bitmap fields shows which VLANs map to each MSTP instance, useful for verifying a VLAN was correctly assigned after a configuration change. Unexpected values in tnExtMstpCistBpduFiltering would explain why a port isn't participating in spanning tree at all.

What Can Be Monitored

MSTP/CIST port role and state
BPDU filtering status
BPDU guard status
port error-recovery timeout
VLAN-to-MSTI instance mapping

Imported Objects

From IEEE8021-MSTP-MIB

ieee8021MstpCistEntry	OBJECT-TYPE
ieee8021MstpCistPortEntry	OBJECT-TYPE
ieee8021MstpEntry	OBJECT-TYPE
ieee8021MstpPortEntry	OBJECT-TYPE

From IEEE8021-TC-MIB

IEEE8021BridgePortNumber
IEEE8021PbbComponentIdentifier

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION
TruthValue

From TRANSITION-SMI

tnProducts

OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
tnXSTPMIB	1.3.6.1.4.1.868.2.5.111			TBD
tnXSTPMIBNotifications	1.3.6.1.4.1.868.2.5.111.1
tnXSTPMgmtObjects	1.3.6.1.4.1.868.2.5.111.2
tnExtMstpCistTable	1.3.6.1.4.1.868.2.5.111.2.1		not-accessible	The Common and Internal Spanning Tree (CIST) Table. Each row in the table represents information regarding a Bridge's Bridge Protocol Entity for the CIST.
tnExtMstpCistEntry	1.3.6.1.4.1.868.2.5.111.2.1.1		not-accessible	A extension MSTP Cist Table entry
T/F tnExtMstpCistBpduFiltering	1.3.6.1.4.1.868.2.5.111.2.1.1.1	TruthValue	read-write	This object control whether a port explicitly configured as Edge will transmit and receive BPDUs
T/F tnExtMstpCistBpduGuard	1.3.6.1.4.1.868.2.5.111.2.1.1.2	TruthValue	read-write	This object control whether a port explicitly configured as Edge will disable itself upon reception of a BPDU.The port will enter the error-disabled state, and will be removed from the active topology.
I32 tnExtMstpCistRecoveryTimeout	1.3.6.1.4.1.868.2.5.111.2.1.1.3	Integer32	read-write	The time to pass before a port in the error-disabled state can be enabled. Valid values are between 30 and 86400 seconds (24 hours). And 0 means disabled
tnExtMstpTable	1.3.6.1.4.1.868.2.5.111.2.2		not-accessible	In an MSTP Bridge, the MSTP Table. Each row in the Table represents information regarding a Bridge's Bridge Protocol Entity for the specified Spanning Tree instance.
tnExtMstpEntry	1.3.6.1.4.1.868.2.5.111.2.2.1		not-accessible	A extension MSTP Table entry.
OCT tnExtMstpVids0	1.3.6.1.4.1.868.2.5.111.2.2.1.1	OCTET STRING	read-create	This object contains the first 1024 bits of the 4096 bit vector indicating which VIDs are assigned to this MSTID. The high order bit of the first octet corresponds to the first bit of the vector, while the low order bit of the last octet corresponds to the last bit of this portion of the vector. A bit that is on (equal to 1) indicates that the corresponding VID is assigned to this MSTID.
OCT tnExtMstpVids1	1.3.6.1.4.1.868.2.5.111.2.2.1.2	OCTET STRING	read-create	This object contains the second 1024 bits of the 4096 bit vector indicating which VIDs are assigned to this MSTID. The high order bit of the first octet corresponds to the first bit of this portion of the vector, while the low order bit of the last octet corresponds to the last bit of this portion of the vector. A bit that is on (equal to 1) indicates that the corresponding VID is assigned to this MSTID.
OCT tnExtMstpVids2	1.3.6.1.4.1.868.2.5.111.2.2.1.3	OCTET STRING	read-create	This object contains the third 1024 bits of the 4096 bit vector indicating which VIDs are assigned to this MSTID. The high order bit of the first octet corresponds to the first bit of this portion of the vector, while the low order bit of the last octet corresponds to the last bit of this portion of the vector. A bit that is on (equal to 1) indicates that the corresponding VID is assigned to this MSTID.
OCT tnExtMstpVids3	1.3.6.1.4.1.868.2.5.111.2.2.1.4	OCTET STRING	read-create	This object contains the fourth 1024 bits of the 4096 bit vector indicating which VIDs are assigned to this MSTID. The high order bit of the first octet corresponds to the first bit of this portion of the vector, while the low order bit of the last octet corresponds to the last bit of this portion of the vector. A bit that is on (equal to 1) indicates that the corresponding VID is assigned to this MSTID.
tnExtMstpCistPortTable	1.3.6.1.4.1.868.2.5.111.2.3		not-accessible	The CIST Port Table. Each row in the Table represents information regarding a specific Port within the Bridge's Bridge Protocol Entity, for the CIST.
tnExtMstpCistPortEntry	1.3.6.1.4.1.868.2.5.111.2.3.1		not-accessible	A extension MSTP Cist Port Table entry.
T/F tnExtMstpCistPortBpduGuard	1.3.6.1.4.1.868.2.5.111.2.3.1.1	TruthValue	read-write	If enabled, causes the port to disable itself upon receiving valid BPDU's. Contrary to the similar bridge setting, the port Edge status does not effect this setting. A port entering error-disabled state due to this setting is subject to the bridge Port Error Recovery setting as well.
T/F tnExtMstpCistPortAutoEdge	1.3.6.1.4.1.868.2.5.111.2.3.1.2	TruthValue	read-write	Controls whether the bridge should enable automatic edge detection on the bridge port. This allows operEdge to be derived from whether BPDU's are received on the port or not.
tnExtMstpPortTable	1.3.6.1.4.1.868.2.5.111.2.4		not-accessible	The MSTP Port Table. Each row in the Table represents information regarding a specific Port within the Bridge's Bridge Protocol Entity, for a given MSTI. The values of all writable objects in this table MUST be retained across reinitializations of the management system. Note that entries will exist in this table only for bridge components for which the corresponding instance of ieee8021SpanningTreeVersion (from the IEEE8021-SPANNING-TREE-MIB) has a value of mstp(2)
tnExtMstpPortEntry	1.3.6.1.4.1.868.2.5.111.2.4.1		not-accessible	A extension MSTP Port Table entry
I32 tnExtMstpPortAdminPathCost	1.3.6.1.4.1.868.2.5.111.2.4.1.1	Integer32	read-write	The administratively assigned value for the contribution of this port to the path cost of paths toward the spanning tree root. Writing a value of '0' assigns the automatically calculated default Path Cost value to the port. If the default Path Cost is being used, this object returns '0' when read.
tnXstpPortStatsTable	1.3.6.1.4.1.868.2.5.111.2.5		not-accessible	The STP Port statistics Table.
tnXstpPortStatsEntry	1.3.6.1.4.1.868.2.5.111.2.5.1		not-accessible	A XSTP port statistics Table entry.
OID tnXstpPortStatsComponentId	1.3.6.1.4.1.868.2.5.111.2.5.1.1	IEEE8021PbbComponentIdentifier	not-accessible	The component identifier is used to distinguish between the multiple virtual bridge instances within a PBB. In simple situations where there is only a single component the default value is 1
IEE tnXstpPortStatsPort	1.3.6.1.4.1.868.2.5.111.2.5.1.2	IEEE8021BridgePortNumber	not-accessible	The port number of the port for which this entry contains Spanning Tree Protocol management information.
I32 tnXstpPortStatsMstpTx	1.3.6.1.4.1.868.2.5.111.2.5.1.3	Integer32	read-only	The number of MSTP Configuration BPDU's transmitted on the port.
I32 tnXstpPortStatsRstpTx	1.3.6.1.4.1.868.2.5.111.2.5.1.4	Integer32	read-only	The number of RSTP Configuration BPDU's transmitted on the port.
I32 tnXstpPortStatsStpTx	1.3.6.1.4.1.868.2.5.111.2.5.1.5	Integer32	read-only	The number of STP Configuration BPDU's transmitted on the port.
I32 tnXstpPortStatsTcnTx	1.3.6.1.4.1.868.2.5.111.2.5.1.6	Integer32	read-only	The number of TCN Configuration BPDU's transmitted on the port.
I32 tnXstpPortStatsMstpRx	1.3.6.1.4.1.868.2.5.111.2.5.1.7	Integer32	read-only	The number of MSTP Configuration BPDU's received on the port.
I32 tnXstpPortStatsRstpRx	1.3.6.1.4.1.868.2.5.111.2.5.1.8	Integer32	read-only	The number of RSTP Configuration BPDU's received on the port.
I32 tnXstpPortStatsStpRx	1.3.6.1.4.1.868.2.5.111.2.5.1.9	Integer32	read-only	The number of STP Configuration BPDU's received on the port.
I32 tnXstpPortStatsTcnRx	1.3.6.1.4.1.868.2.5.111.2.5.1.10	Integer32	read-only	The number of TCN Configuration BPDU's received on the port.
I32 tnXstpPortStatsUnknown	1.3.6.1.4.1.868.2.5.111.2.5.1.11	Integer32	read-only	The number of unkown BPDU's received on the port.
I32 tnXstpPortStatsLllegal	1.3.6.1.4.1.868.2.5.111.2.5.1.12	Integer32	read-only	The number of lllegal BPDU's received on the port.
T/F tnXstpPortStatsClear	1.3.6.1.4.1.868.2.5.111.2.5.1.13	TruthValue	read-write	Clear the stats
tnXSTPMIBConformance	1.3.6.1.4.1.868.2.5.111.3

RFC description

Provides extensions to the Ethernet protection spanning tree configuration on Transition Networks equipment.

Start monitoring Transition Networks managed Ethernet switch (RSTP/MSTP BPDU-guard/port-recovery status) 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 TN-XSTP-MIB

What Is TN-XSTP-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description