TPLINK-SPANNING-TREE-MIB

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Organization: TPLINK

Last Updated: 2012-11-21

Category: Link Layer and Ethernet Protocols

Description: Manages TP-Link switch spanning tree protocol mode, bridge priority, and per-port STP parameters.

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What Is TPLINK-SPANNING-TREE-MIB?

TPLINK-SPANNING-TREE-MIB is a TP-Link proprietary module for configuring and monitoring Spanning Tree Protocol (STP/RSTP/MSTP) behavior on their managed switches, used to prevent Layer 2 forwarding loops in redundantly connected networks. It exposes configuration objects for STP mode selection, bridge priority, and per-port parameters such as path cost and port priority, alongside status information reflecting each port's current STP role and forwarding state. Its monitoring purpose centers on network topology and software protocol status: administrators track whether ports are in the expected forwarding, blocking, or discarding state to confirm loop prevention is working and to detect unexpected topology changes that could indicate a failing link or an unintended loop. It commonly depends on the standard BRIDGE-MIB (IEEE 802.1D) for baseline spanning tree objects, extending it with TP-Link-specific per-port controls. It is deployed on TP-Link switches in networks with redundant Layer 2 links where spanning tree convergence and stability must be verified. Engineers can download the TPLINK-SPANNING-TREE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in TPLINK-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

TP-Link managed switch

Monitoring Examples

No sample object or table names were provided in the source for this module, so a concrete polling example naming specific objects cannot be honestly constructed here; in practice an administrator would be expected to poll per-port STP role and state objects together with bridge priority to confirm the expected root bridge and topology, flagging a port unexpectedly stuck in a blocking or discarding state, or a rapid succession of topology change notifications, as signs of an unstable spanning tree.

Imported Objects

From RFC1213-MIB

ifIndex

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From TPLINK-MIB

tplinkMgmt

OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
tplinkSpanningTreeMIB	1.3.6.1.4.1.11863.6.21			Private MIB for Spanning-Tree.
tplinkSpanningTreeMIBObjects	1.3.6.1.4.1.11863.6.21.1
tplinkSpanningTreeNotifications	1.3.6.1.4.1.11863.6.21.2
INT tpMstpClearInstanceVlanId	1.3.6.1.4.1.11863.6.21.1.3.2.1.5	INTEGER	read-write	This object use to clear instance's vlan id.The cleared VLAN ID will be automatically mapped to the CIST.
INT tpMstpEnable	1.3.6.1.4.1.11863.6.21.1.1.1.3	INTEGER	read-write	Multiple Spanning Tree Protocol. 0. disable 1. enable
tpMstpInstanceConfigEntry	1.3.6.1.4.1.11863.6.21.1.3.2.1		not-accessible	An entry contains of the mstp instance.
tpMstpInstanceConfigTable	1.3.6.1.4.1.11863.6.21.1.3.2		not-accessible	Here you can set the VLAN-to-spanning-tree mapping configuration.
INT tpMstpInstanceEnable	1.3.6.1.4.1.11863.6.21.1.3.2.1.2	INTEGER	read-only	Displays status of the instance. 0. Disable 1. Enable
INT tpMstpInstanceId	1.3.6.1.4.1.11863.6.21.1.3.2.1.1	INTEGER	read-only	Displays Instance ID of the switch,0 representative CIST.
tpMstpInstancePortConfigEntry	1.3.6.1.4.1.11863.6.21.1.3.3.1		not-accessible	An entry contains of the mstp instance port config.
INT tpMstpInstancePortConfigId	1.3.6.1.4.1.11863.6.21.1.3.3.1.1	INTEGER	read-only	The instance ID for its port configuration, 1-8.
tpMstpInstancePortConfigTable	1.3.6.1.4.1.11863.6.21.1.3.3		not-accessible	A port can play different roles in different spanning tree instance. Here you can configure the parameters of the ports in different instance IDs as well as view status of the ports in the specified instance.
OCT tpMstpInstancePortLag	1.3.6.1.4.1.11863.6.21.1.3.3.1.7	OCTET STRING	read-only	Displays the LAG number which the port belongs to.
OCT tpMstpInstancePortNumber	1.3.6.1.4.1.11863.6.21.1.3.3.1.2	OCTET STRING	read-only	Displays the port number of the switch.
INT tpMstpInstancePortPathCost	1.3.6.1.4.1.11863.6.21.1.3.3.1.4	INTEGER	read-write	Path Cost is used to choose the path and calculate the path costs of ports in an MST region. It is an important criterion on determining the root port. The lower value has the higher priority.
INT tpMstpInstancePortPriority	1.3.6.1.4.1.11863.6.21.1.3.3.1.3	INTEGER	read-write	Enter the priority of the port in the instance. It is an important criterion on determining if the port will be chosen as the root port by the device connected to this port.
INT tpMstpInstancePortRole	1.3.6.1.4.1.11863.6.21.1.3.3.1.5	INTEGER	read-only	Displays the role of the port played in the STP Instance. 1. Disable 2. Alternate 3. Backup 4. Designated 5. root 6. Master
INT tpMstpInstancePortStatus	1.3.6.1.4.1.11863.6.21.1.3.3.1.6	INTEGER	read-only	Displays the working status of the port. 1. Disable 2. Blocking 3. Learning 4. Forwarding
INT tpMstpInstancePriority	1.3.6.1.4.1.11863.6.21.1.3.2.1.3	INTEGER	read-write	Enter the priority of the switch in the instance. It is an important criterion on determining if the switch will be chosen as the root bridge in the specific instance.Make sure that Priority ranges from 0 to 61440 and could be divided exactly by 4096
OCT tpMstpInstanceVlanId	1.3.6.1.4.1.11863.6.21.1.3.2.1.4	OCTET STRING	read-write	Enter the desired VLAN ID. After modification here, the new VLAN ID will be added to the corresponding instance ID and the previous VLAN ID won't be replaced.The format of input VLAN ID shoud be like '1,3,4-7,11-30' in the range from 1 to 4094.
tpMstpRegionConfig	1.3.6.1.4.1.11863.6.21.1.3.1
OCT tpMstpRegionName	1.3.6.1.4.1.11863.6.21.1.3.1.1	OCTET STRING	read-write	Create a name for MST region identification using up to 32 characters.
INT tpMstpRevision	1.3.6.1.4.1.11863.6.21.1.3.1.2	INTEGER	read-write	Enter the revision from 0 to 65535 for MST region identification.
NTF tpMstpTopologyChange	1.3.6.1.4.1.11863.6.21.2.1			The topology of spanning tree has changed.
INT tpRstpEnable	1.3.6.1.4.1.11863.6.21.1.1.1.2	INTEGER	read-write	Rapid Spanning Tree Protocol. 0. disable 1. enable
INT tpStpAgingTime	1.3.6.1.4.1.11863.6.21.1.1.2.3	INTEGER	read-write	Enter a value from 6 to 40 in seconds to specify the maximum time the switch can wait without receiving a BPDU before attempting to reconfigure. (tpStpHelloTime+1)*2<=tpStpAgingTime.
tpStpBasicCfg	1.3.6.1.4.1.11863.6.21.1.1
tpStpBasicGlobalConfig	1.3.6.1.4.1.11863.6.21.1.1.1
tpStpBasicParamConfig	1.3.6.1.4.1.11863.6.21.1.1.2
INT tpStpBPDUDefendEnable	1.3.6.1.4.1.11863.6.21.1.4.1.1.5	INTEGER	read-write	BPDU defend is to prevent BPDUs flood in the STP network. 0. Disable 1. Enable
INT tpStpBPDUHoldEnable	1.3.6.1.4.1.11863.6.21.1.4.1.1.6	INTEGER	read-write	0. Disable 1. Enable
INT tpStpCistPriority	1.3.6.1.4.1.11863.6.21.1.1.2.1	INTEGER	read-write	Enter a value from 0 to 61440 to specify the priority of the switch for comparison in the CIST. CIST priority is an important criterion on determining the root bridge. In the same condition, the switch with the highest priority will be chosen as the root bridge. The lower value has the higher priority. The value could be devided exactly by 4096.
OCT tpStpCISTRoot	1.3.6.1.4.1.11863.6.21.1.1.3.4	OCTET STRING	read-only	CIST Root.
OCT tpStpDefendPortLag	1.3.6.1.4.1.11863.6.21.1.4.1.1.7	OCTET STRING	read-only	Displays the LAG number which the port belongs to.
OCT tpStpDefendPortNumber	1.3.6.1.4.1.11863.6.21.1.4.1.1.1	OCTET STRING	read-only	Displays the port number of the switch.
OCT tpStpDesignatedBridge	1.3.6.1.4.1.11863.6.21.1.1.3.8	OCTET STRING	read-only	Designated Bridge.
INT tpStpEdgePortStatus	1.3.6.1.4.1.11863.6.21.1.2.1.1.6	INTEGER	read-write	Select Enable/Disable Edge Port. The edge port can transit its state from blocking to forwarding rapidly without waiting for forward delay. 0. Disable 1. Enable
INT tpStpEnable	1.3.6.1.4.1.11863.6.21.1.1.1.1	INTEGER	read-write	Spanning Tree Protocol. 0. disable 1. enable
INT tpStpEnableStatus	1.3.6.1.4.1.11863.6.21.1.1.3.1	INTEGER	read-only	0. disable 1. enable
INT tpStpExPathCost	1.3.6.1.4.1.11863.6.21.1.1.3.5	INTEGER	read-only	External Path cost.
INT tpStpForwardDelay	1.3.6.1.4.1.11863.6.21.1.1.2.4	INTEGER	read-write	Enter a value from 4 to 30 in seconds to specify the time for the port to transit its state after the network topology is changed. stpAgingTime<=(stpForwardDelay-1)*2.
INT tpStpHelloTime	1.3.6.1.4.1.11863.6.21.1.1.2.2	INTEGER	read-write	Enter a value from 1 to 10 in seconds to specify the interval to send BPDU packets. It is used to test the links. (tpStpHelloTime+1)*2<=tpStpAgingTime.
INT tpStpHoldCount	1.3.6.1.4.1.11863.6.21.1.1.2.5	INTEGER	read-write	Enter a value from 1 to 20 to set the maximum number of BPDU packets transmitted per Hello Time interval.
tpStpInfo	1.3.6.1.4.1.11863.6.21.1.1.3
INT tpStpInPathCost	1.3.6.1.4.1.11863.6.21.1.1.3.7	INTEGER	read-only	Internal Path cost.
tpStpInstanceCfg	1.3.6.1.4.1.11863.6.21.1.3
OCT tpStpLastTopologyChangeTime	1.3.6.1.4.1.11863.6.21.1.1.3.10	OCTET STRING	read-only	LastTopologyChangeTime.
OCT tpStpLocalBridge	1.3.6.1.4.1.11863.6.21.1.1.3.3	OCTET STRING	read-only	Local bridge.
INT tpStpLoopDefendEnable	1.3.6.1.4.1.11863.6.21.1.4.1.1.2	INTEGER	read-write	Loop defend is to prevent the loops in the network brought by recalculating STP because of link failures and network congestions. 0. Disable 1. Enable
INT tpStpMaxHops	1.3.6.1.4.1.11863.6.21.1.1.2.6	INTEGER	read-write	Enter a value from 1 to 40 to set the maximum number of hops that occur in a specific region before the BPDU is discarded.
INT tpStpMode	1.3.6.1.4.1.11863.6.21.1.1.3.2	INTEGER	read-only	1. stp 2. rstp 3. mstp
INT tpStpPointToPointStatus	1.3.6.1.4.1.11863.6.21.1.2.1.1.7	INTEGER	read-write	Select the P2P link status. If the two ports in the P2P link are root port or designated port, they can transit their states to forwarding rapidly to reduce the unnecessary forward delay. 0. auto 1. force enable 2. force disable
tpStpPortCfg	1.3.6.1.4.1.11863.6.21.1.2
tpStpPortConfigEntry	1.3.6.1.4.1.11863.6.21.1.2.1.1		not-accessible	An entry contains of the information of a port.
tpStpPortConfigTable	1.3.6.1.4.1.11863.6.21.1.2.1		not-accessible	Here you can configure the parameters of the ports for comparison in the CIST and the common parameters of all Instances. And you can view the status of the ports in the CIST. CIST (Common and Internal Spanning Tree) is the spanning tree in a switched network, connecting all devices in the network.
tpStpPortDefendEntry	1.3.6.1.4.1.11863.6.21.1.4.1.1		not-accessible	An entry contains of the information of a port protection.
tpStpPortDefendTable	1.3.6.1.4.1.11863.6.21.1.4.1		not-accessible	Port defend function is to prevent the devices from any malicious attack against STP features..
INT tpStpPortEnable	1.3.6.1.4.1.11863.6.21.1.2.1.1.2	INTEGER	read-write	Select Enable /Disable STP function for the desired port. 0. Disable 1. Enable 2. ErrPort
INT tpStpPortExPathCost	1.3.6.1.4.1.11863.6.21.1.2.1.1.4	INTEGER	read-write	ExPath Cost is used to choose the path and calculate the path costs of ports in different MST regions. It is an important criterion on determining the root port. The lower value has the higher priority. automatic when value is zero. Make sure that Path Cost ranges from 0 to 2000000.
INT tpStpPortInPathCost	1.3.6.1.4.1.11863.6.21.1.2.1.1.5	INTEGER	read-write	InPath Cost is used to choose the path and calculate the path costs of ports in an MST region. It is an important criterion on determining the root port. The lower value has the higher priority. Make sure that Path Cost ranges from 0 to 2000000.
OCT tpStpPortLag	1.3.6.1.4.1.11863.6.21.1.2.1.1.12	OCTET STRING	read-only	Displays the LAG number which the port belongs to.
INT tpStpPortMCheck	1.3.6.1.4.1.11863.6.21.1.2.1.1.8	INTEGER	read-write	Select Enable to perform MCheck operation on the port. Unchange means no MCheck operation. 0. unChange 1. enable
OCT tpStpPortNumber	1.3.6.1.4.1.11863.6.21.1.2.1.1.1	OCTET STRING	read-only	Displays the port number of the switch.
INT tpStpPortPriority	1.3.6.1.4.1.11863.6.21.1.2.1.1.3	INTEGER	read-write	Enter a value from 0 to 240 divisible by 16. Port priority is an important criterion on determining the root port. In the same condition, the port with the highest priority will be chosen as the root port. The lower value has the higher priority.
INT tpStpPortRole	1.3.6.1.4.1.11863.6.21.1.2.1.1.10	INTEGER	read-only	Displays the role of the port played in the STP Instance. 1.Disable:Indicates the port that is not participating in the STP. 2.Alternate:Indicates the port that can be a backup port of a root or master port. 3.Backup:Indicates the port that is the backup port of a designated port. 4.Designated:Indicates the port that forwards packets to a downstream network segment or switch. 5.root:Indicates the port that has the lowest path cost from this bridge to the Root Bridge and forwards packets to the root. 6.Master:Indicates the port that connects a MST region to the common root. The path from the master port to the common root is the shortest path between this MST region and the common root.
INT tpStpPortStatus	1.3.6.1.4.1.11863.6.21.1.2.1.1.11	INTEGER	read-only	Displays the working status of the port. 1.Disconnected: In this status the port is not participating in the STP. 2.Blocking: In this status the port can only receive BPDU packets. 3.Learning: In this status the port can receive/send BPDU packets and learn MAC address. 4.Forwarding: In this status the port can receive/forward data, receive/send BPDU packets as well as learn MAC address.
INT tpStpPortStpVersion	1.3.6.1.4.1.11863.6.21.1.2.1.1.9	INTEGER	read-only	Displays the STP version of the port. 1. stp 2. rstp 3. mstp
OCT tpStpRegionRoot	1.3.6.1.4.1.11863.6.21.1.1.3.6	OCTET STRING	read-only	Region Root.
INT tpStpRootBridgeDefendEnable	1.3.6.1.4.1.11863.6.21.1.4.1.1.3	INTEGER	read-write	Root defend is to prevent wrong network topology change caused by the role change of the current legal root bridge. 0. Disable 1. Enable
INT tpStpRootPort	1.3.6.1.4.1.11863.6.21.1.1.3.9	INTEGER	read-only	RootPort.
tpStpSecurityCfg	1.3.6.1.4.1.11863.6.21.1.4
tpStpTcDefendConfig	1.3.6.1.4.1.11863.6.21.1.4.2
INT tpStpTcDefendEnable	1.3.6.1.4.1.11863.6.21.1.4.1.1.4	INTEGER	read-write	TC defend is to prevent the decrease of the performance and stability of the switch brought by continuously removing MAC address entries upon receiving TC-BPDUs in the STP network. 0. Disable 1. Enable
INT tpStpTcDefendThreshold	1.3.6.1.4.1.11863.6.21.1.4.2.1	INTEGER	read-write	Enter a number from 1 to 100. It is the maximum number of the TC-BPDUs received by the switch in a TC Protect Cycle.
INT tpStpTcDefendTimer	1.3.6.1.4.1.11863.6.21.1.4.2.2	INTEGER	read-write	Enter a value from 1 to 10 to specify the TC Protect Cycle.
INT tpStpTopologyChangeCounter	1.3.6.1.4.1.11863.6.21.1.1.3.11	INTEGER	read-only	TopologyChangeCounter.

RFC description

TP-Link Spanning Tree Protocol management with STP, RSTP, and MSTP configuration and status.

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Download TPLINK-SPANNING-TREE-MIB

What Is TPLINK-SPANNING-TREE-MIB?

Supported Devices

Monitoring Examples

This MIB depends on

Related MIBs

RFC description