All MIBs › IEEE8021-MSTP-MIB
Organization: IEEE 802.1 Working Group
Last Updated: 2018-06-28
Category: Protocol: STP, Standard: IEEE 802, Technology: Switching/L2, VLAN and Bridging
Description: IEEE 802.1 MIB for Multiple Spanning Tree Protocol (MSTP/802.1s), used to manage multiple spanning tree instances across VLAN environments.
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What Is IEEE8021-MSTP-MIB?
This is a vendor-neutral IEEE 802.1Q standards MIB for Multiple Spanning Tree Protocol (MSTP, 802.1s), used to manage multiple spanning tree instances mapped to VLAN groups on bridged networks. It exposes both a Common and Internal Spanning Tree (CIST) table and per-MST-instance tables, covering bridge identifiers, regional root identifiers, path cost, max hops, and topology-change counters/timestamps. Its monitoring value is chiefly topological/operational health: a rising topology-change count reveals network instability from repeated STP reconvergence, a strong indicator of a flapping link or misconfigured bridge. As a Bridge MIB extension it depends on and complements the base IEEE8021-SPANNING-TREE-MIB and the broader 802.1Q Bridge MIB framework. As an IEEE8021-MSTP-MIB reference, it is typically deployed on enterprise/campus Ethernet switches that use MSTP to load-balance VLANs across redundant links while avoiding loops.
IPNetwork Monitor allows you to monitor SNMP objects defined in IEEE8021-MSTP-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
- vendor-neutral, IEEE 802.1s standards-based MIB, not tied to a specific manufacturer
- enterprise/campus Ethernet bridge or switch
Monitoring Examples
An admin walks ieee8021MstpCistTable (indexed by ieee8021MstpCistComponentId) to read ieee8021MstpCistBridgeIdentifier and ieee8021MstpCistRegionalRootIdentifier, confirming which bridge is acting as the CIST/regional root. A rising ieee8021MstpCistTopologyChange counter would indicate an unstable link causing repeated reconvergence, and per-MST-instance data from ieee8021MstpTable/ieee8021MstpEntry (keyed by ieee8021MstpComponentId and ieee8021MstpId) lets an operator verify each spanning tree instance's root and path cost, tracked via ieee8021MstpCistPathCost, are as expected for its VLAN mapping.
What Can Be Monitored
- CIST/regional root bridge identifier
- topology change count and time since last change
- root path cost
- max hops
- per-MSTI root/path-cost status
This MIB depends on
Related MIBs
Imported Objects
From BRIDGE-MIB
| BridgeId |
From IEEE8021-TC-MIB
| IEEE8021BridgePortNumber | |
| IEEE8021MstIdentifier | |
| IEEE8021PbbComponentIdentifier | |
| IEEE8021VlanIndex | |
| ieee802dot1mibs | OBJECT-IDENTITY |
From SNMP-FRAMEWORK-MIB
| SnmpAdminString |
From SNMPv2-CONF
| MODULE-COMPLIANCE | |
| OBJECT-GROUP |
From SNMPv2-SMI
| Counter64 | |
| Integer32 | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| TimeTicks | |
| Unsigned32 |
From SNMPv2-TC
| RowStatus | |
| TruthValue |
How to Use in IPNetwork Monitor
Example using ieee8021MstpTopologyChanges OID:
Select a device implementing IEEE8021-MSTP-MIB as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type ieee8021MstpTopologyChanges into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. It reports in an MSTP Bridge, count of the times tcWhile has been non-zero for any Port for the MSTI since the Bridge was powered on or initialized. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter64-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline (in topology changes), since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.
OIDs
| OID symbolic | OID numeric | Type | Access | Description |
|---|---|---|---|---|
| BRI ieee8021MstpBridgeId | 1.3.111.2.802.1.1.6.1.2.1.3 | BridgeId | read-only | In an MSTP Bridge, the Bridge Identifier for the MSTI. |
| I32 ieee8021MstpBridgePriority | 1.3.111.2.802.1.1.6.1.2.1.10 | Integer32 | read-create | In an MSTP Bridge, the Bridge Priority parameter value for the MSTI, i.e., the most significant 4 bits of the Bridge Identifier for the MSTI. |
| BRI ieee8021MstpCistBridgeIdentifier | 1.3.111.2.802.1.1.6.1.1.1.2 | BridgeId | read-only | The Bridge Identifier for the CIST. |
| OID ieee8021MstpCistComponentId | 1.3.111.2.802.1.1.6.1.1.1.1 | 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. |
| ieee8021MstpCistEntry | 1.3.111.2.802.1.1.6.1.1.1 | not-accessible | A CIST Table entry. | |
| ieee8021MstpCistGroup | 1.3.111.2.802.1.1.6.2.1.1 | Objects for the CIST group | ||
| I32 ieee8021MstpCistMaxHops | 1.3.111.2.802.1.1.6.1.1.1.6 | Integer32 | read-write | In an MSTP Bridge, the MaxHops parameter. The value of this object MUST be retained across reinitializations of the management system. |
| U32 ieee8021MstpCistPathCost | 1.3.111.2.802.1.1.6.1.1.1.5 | Unsigned32 | read-only | In an MSTP Bridge, the CIST Path Cost parameter, i.e., the CIST path cost from the transmitting Bridge to the CIST Regional Root. The sum (about 20 possible out of the given range) of multiple port path costs. Also, if the 'transmitting Bridge' is the 'CIST Regional Root', then this value could be zero. |
| T/F ieee8021MstpCistPortAdminEdgePort | 1.3.111.2.802.1.1.6.1.3.1.8 | TruthValue | read-write | In a Bridge that supports the identification of edge ports, the Port's Admin Edge Port parameter value, for the CIST. |
| I32 ieee8021MstpCistPortAdminPathCost | 1.3.111.2.802.1.1.6.1.3.1.4 | 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. This complements the object ieee8021MstpCistPortCistPathCost, which returns the operational value of the port path cost. The value of this object MUST be retained across reinitializations of the management system. |
| T/F ieee8021MstpCistPortAutoEdgePort | 1.3.111.2.802.1.1.6.1.8.1.1 | TruthValue | read-write | The administrative value of the Auto Edge Port parameter. A value of true(1) indicates if the Bridge detection state machine (BDM, 13.31) is to detect other Bridges attached to the LAN, and set ieee8021SpanningTreeRstpPortOperEdgePort automatically. The default value is true(1) This is optional and provided only by implementations that support the automatic identification of edge ports. The value of this object MUST be retained across reinitializations of the management system. |
| T/F ieee8021MstpCistPortAutoIsolatePort | 1.3.111.2.802.1.1.6.1.8.1.2 | TruthValue | read-only | The operational value of the Isolate Port parameter. A value of true(1) indicates a Designated Port will transition to discarding if both ieee8021SpanningTreeRstpPortAdminEdgePort and ieee8021SpanningTreeRstpPortAutoEdgePort are FALSE and the other Bridge presumed to be attached to the same point-to-point LAN does not transmit periodic BPDUs. This is optional and provided only by implementations that support the automatic identification of fragile Bridges. |
| U32 ieee8021MstpCistPortCistPathCost | 1.3.111.2.802.1.1.6.1.3.1.17 | Unsigned32 | read-only | In an MSTP Bridge, the Port's Port Path Cost parameter value for the CIST. |
| BRI ieee8021MstpCistPortCistRegionalRootId | 1.3.111.2.802.1.1.6.1.3.1.16 | BridgeId | read-only | In an MSTP Bridge, the CIST Regional Root Identifier, i.e., the Bridge Identifier of the current CIST Regional Root, for the CIST. |
| OID ieee8021MstpCistPortComponentId | 1.3.111.2.802.1.1.6.1.3.1.1 | 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. |
| BRI ieee8021MstpCistPortDesignatedRoot | 1.3.111.2.802.1.1.6.1.3.1.5 | BridgeId | read-only | The CIST Regional Root Identifier component of the Port's port priority vector, as defined in 13.10, for the CIST. |
| T/F ieee8021MstpCistPortDisputed | 1.3.111.2.802.1.1.6.1.3.1.15 | TruthValue | read-only | The current value of the disputed variable for the CIST for the Port. A value of true(1) indicates that the disputed variable is set. A value of false(2) indicates that the agreed variable is cleared. |
| T/F ieee8021MstpCistPortEnableBPDURx | 1.3.111.2.802.1.1.6.1.3.1.19 | TruthValue | read-write | In an MSTP Bridge, the enableBPDUrx parameter value. A value of false(2) indicates that BPDUs are ignored. |
| T/F ieee8021MstpCistPortEnableBPDUTx | 1.3.111.2.802.1.1.6.1.3.1.20 | TruthValue | read-write | In an MSTP Bridge, the enableBPDUtx parameter value. A value of false(2) indicates that BPDUs are not transmitted. |
| ieee8021MstpCistPortEntry | 1.3.111.2.802.1.1.6.1.3.1 | not-accessible | A CIST Port Table entry. | |
| ieee8021MstpCistPortExtensionEntry | 1.3.111.2.802.1.1.6.1.8.1 | not-accessible | A list of additional objects containing information maintained by every port about the CIST state for that port. | |
| ieee8021MstpCistPortExtensionGroup | 1.3.111.2.802.1.1.6.2.1.8 | Objects for the CIST Port Extension group for fragile Bridges | ||
| ieee8021MstpCistPortExtensionTable | 1.3.111.2.802.1.1.6.1.8 | not-accessible | The CIST Port Extensions Table. Each row in the Table represents information regarding a specific Port within the Bridge's Bridge Protocol Entity, for the CIST. | |
| ieee8021MstpCistPortGroup | 1.3.111.2.802.1.1.6.2.1.3 | Objects for the CIST Port group | ||
| I32 ieee8021MstpCistPortHelloTime | 1.3.111.2.802.1.1.6.1.3.1.7 | Integer32 | read-only | The Port's Hello Time timer parameter value, for the CIST. In centi-seconds |
| T/F ieee8021MstpCistPortIsL2Gp | 1.3.111.2.802.1.1.6.1.3.1.22 | TruthValue | read-write | In an MSTP Bridge, the isL2gp parameter value. A value of true(1) indicates this is an L2GP port. |
| T/F ieee8021MstpCistPortMacEnabled | 1.3.111.2.802.1.1.6.1.3.1.10 | TruthValue | read-write | In a Bridge that supports the MAC Enabled parameter, the current state of the MAC Enabled parameter. True(1) indicates that adminstratively the MAC is set as if it was connected to a point-to-point LAN. |
| T/F ieee8021MstpCistPortMacOperational | 1.3.111.2.802.1.1.6.1.3.1.11 | TruthValue | read-only | In a Bridge that supports the MAC Operational parameter, the current state of the MAC Operational parameter. True(1) indicates the MAC is operational. |
| IEE ieee8021MstpCistPortNum | 1.3.111.2.802.1.1.6.1.3.1.2 | IEEE8021BridgePortNumber | not-accessible | The Port's Port Number parameter value for the CIST, i.e., the number of the Bridge Port for the CIST. |
| T/F ieee8021MstpCistPortOperEdgePort | 1.3.111.2.802.1.1.6.1.3.1.9 | TruthValue | read-only | In a Bridge that supports the identification of edge ports, the Port's operational Edge Port parameter value, for the CIST. True(1) if it is an Oper Edge Port. |
| T/F ieee8021MstpCistPortProtocolMigration | 1.3.111.2.802.1.1.6.1.3.1.18 | TruthValue | read-write | In an MSTP Bridge, the current value of the mcheck variable for the Port. A value of true(1) forces the state machine to perform functions as per 13.27.38. |
| BRI ieee8021MstpCistPortPseudoRootId | 1.3.111.2.802.1.1.6.1.3.1.21 | BridgeId | read-write | In an MSTP Bridge, the pseudoRootId parameter value. |
| T/F ieee8021MstpCistPortRestrictedRole | 1.3.111.2.802.1.1.6.1.3.1.12 | TruthValue | read-write | The current state of the restrictedRole parameter for the Port. True(1) causes the Port not to be selected as Root Port for the CIST or any MSTI. |
| T/F ieee8021MstpCistPortRestrictedTcn | 1.3.111.2.802.1.1.6.1.3.1.13 | TruthValue | read-write | The current state of the restrictedTcn parameter for the Port. True(1) causes the Port not to propagate topology changes to other Ports. |
| INT ieee8021MstpCistPortRole | 1.3.111.2.802.1.1.6.1.3.1.14 | INTEGER | read-only | The current Port Role for the Port (i.e., Root, Alternate, Designated, or Backup), for the CIST. |
| ieee8021MstpCistPortTable | 1.3.111.2.802.1.1.6.1.3 | 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. 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(3). This table contains objects corresponding to the following items from 12.8.2.1, 12.8.2.3, and 12.8.2.5. Some of those items are provided in the IEEE8021-SPANNING-TREE-MIB as noted below. From 12.8.2.1: Items a), d), e), and i) through w) are defined in this table The remaining items are covered in the IEEE8021-SPANNING-TREE-MIB: b) ieee8021SpanningTreePortState c) ieee8021SpanningTreePortPriority d) ieee8021SpanningTreePortPathCost f) ieee8021SpanningTreePortDesignatedCost g) ieee8021SpanningTreePortDesignatedBridge h) ieee8021SpanningTreePortDesignatedPort From 12.8.2.3: Items a), b), and d) through h) are defined in this table (item a is the index) The remaining items are covered in the IEEE8021-SPANNING-TREE-MIB: b) ieee8021SpanningTreePortPathCost, c) ieee8021SpanningTreePortPriority From 12.8.2.5: All items are defined in this table Also from 12.8.2.1: Items u), v), w), and x) are defined in this table Also from 12.8.2.3: Items i), j), k), and l) are defined in this table | |
| T/F ieee8021MstpCistPortTopologyChangeAck | 1.3.111.2.802.1.1.6.1.3.1.6 | TruthValue | read-only | The Port's Topology Change Acknowledge parameter value. True(1) if a Configuration Message with a topology change acknowledge flag set is to be transmitted. |
| TIK ieee8021MstpCistPortUptime | 1.3.111.2.802.1.1.6.1.3.1.3 | TimeTicks | read-only | The Port's Uptime parameter value for the CIST, i.e., the count in seconds of the time elapsed since the Port was last reset or initialized (BEGIN, Annex E). |
| BRI ieee8021MstpCistRegionalRootIdentifier | 1.3.111.2.802.1.1.6.1.1.1.4 | BridgeId | read-only | In an MSTP Bridge, the CIST Regional Root Identifier parameter, i.e., the Bridge Identifier of the current CIST Regional Root. |
| ieee8021MstpCistTable | 1.3.111.2.802.1.1.6.1.1 | 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. 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(3). This table contains objects corresponding to the following items from 12.8.1.1 and 12.8.1.3. Some of those items are provided in the IEEE8021-SPANNING-TREE-MIB as noted below. From 12.8.1.1: Items a), c), o), p), and q) are defined in this table The remaining items are covered in the IEEE8021-SPANNING-TREE-MIB: b) ieee8021SpanningTreeTimeSinceTopologyChange c) ieee8021SpanningTreeTopChanges e) ieee8021SpanningTreeDesignatedRoot f) ieee8021SpanningTreeRootCost g) ieee8021SpanningTreeRootPort h) ieee8021SpanningTreeMaxAge i) ieee8021SpanningTreeForwardDelay j) ieee8021SpanningTreeBridgeMaxAge k) ieee8021SpanningTreeBridgeHelloTime l) ieee8021SpanningTreeBridgeForwardDelay m) ieee8021SpanningTreeHoldTime n) ieee8021SpanningTreeVersion From 12.8.1.3: Item g) is defined in this table The remaining items are covered in the IEEE8021-SPANNING-TREE-MIB: a) ieee8021SpanningTreeBridgeMaxAge b) ieee8021SpanningTreeBridgeHelloTime c) ieee8021SpanningTreeBridgeForwardDelay d) ieee8021SpanningTreePriority e) ieee8021SpanningTreeVersion f) ieee8021RstpStpExtTxHoldCount | |
| T/F ieee8021MstpCistTopologyChange | 1.3.111.2.802.1.1.6.1.1.1.3 | TruthValue | read-only | In an STP Bridge, the value of the Topology Change parameter (14.8.1.1.3, item d of IEEE Std 802.1D, 2004 Edition), or in an RSTP or MSTP Bridge, asserted if the tcWhile timer for any Port for the CIST is non-zero. |
| ieee8021MstpCompliance | 1.3.111.2.802.1.1.6.2.2.1 | The compliance statement for devices supporting Multiple Spanning Tree as defined in 13 of IEEE Std 802.1Q. | ||
| ieee8021MstpCompliances | 1.3.111.2.802.1.1.6.2.2 | |||
| ieee8021MstpComplianceV2 | 1.3.111.2.802.1.1.6.2.2.2 | The compliance statement for devices supporting Multiple Spanning Tree as defined in 13 of IEEE Std 802.1Q. | ||
| OID ieee8021MstpComponentId | 1.3.111.2.802.1.1.6.1.2.1.1 | 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. |
| OID ieee8021MstpConfigIdComponentId | 1.3.111.2.802.1.1.6.1.7.1.1 | 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. |
| ieee8021MstpConfigIdEntry | 1.3.111.2.802.1.1.6.1.7.1 | not-accessible | An entry contining the MST Configuration Identifier of a Bridge. | |
| I32 ieee8021MstpConfigIdFormatSelector | 1.3.111.2.802.1.1.6.1.7.1.2 | Integer32 | read-write | In an MSTP Bridge, the Configuration Identifier Format Selector in use by the Bridge, in the MST Configuration Identifier. This has a value of 0 to indicate the format specified in IEEE Std 802.1Q. |
| ieee8021MstpConfigIdGroup | 1.3.111.2.802.1.1.6.2.1.7 | Objects for the MST Configuration Identifier group | ||
| ieee8021MstpConfigIdTable | 1.3.111.2.802.1.1.6.1.7 | not-accessible | A table containing the MST Configuration Identifier for each virtual Bridge. In simple situations where there is only a single component, there will only be a single entry in this table (i.e., only a single MST Configuration Identifier). 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(3). | |
| OCT ieee8021MstpConfigurationDigest | 1.3.111.2.802.1.1.6.1.7.1.5 | OCTET STRING | read-only | In an MSTP Bridge, the Configuration Digest in the MST Configuration Identifier. |
| STR ieee8021MstpConfigurationName | 1.3.111.2.802.1.1.6.1.7.1.3 | SnmpAdminString | read-write | In an MSTP Bridge, the Configuration Name in the MST Configuration Identifier. |
| ieee8021MstpConformance | 1.3.111.2.802.1.1.6.2 | |||
| BRI ieee8021MstpDesignatedRoot | 1.3.111.2.802.1.1.6.1.2.1.7 | BridgeId | read-only | In an MSTP Bridge, the Designated Root parameter value, i.e., the Bridge Identifier of the Root Bridge for the MSTI. |
| ieee8021MstpEntry | 1.3.111.2.802.1.1.6.1.2.1 | not-accessible | A MSTP Table entry. | |
| OID ieee8021MstpFidToMstiComponentId | 1.3.111.2.802.1.1.6.1.5.1.1 | 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. |
| ieee8021MstpFidToMstiEntry | 1.3.111.2.802.1.1.6.1.5.1 | not-accessible | In an MSTP Bridge, a FID to MSTID Allocation Table entry. | |
| U32 ieee8021MstpFidToMstiFid | 1.3.111.2.802.1.1.6.1.5.1.2 | Unsigned32 | not-accessible | In an MSTP Bridge, the FID of the entry in the FID to MSTID Allocation Table. |
| ieee8021MstpFidToMstiGroup | 1.3.111.2.802.1.1.6.2.1.5 | Objects for the MST FID to MSTID Allocation Table group | ||
| OID ieee8021MstpFidToMstiMstId | 1.3.111.2.802.1.1.6.1.5.1.3 | IEEE8021MstIdentifier | read-write | In an MSTP Bridge, the MSTID to which the FID (of the entry in the FID to MSTID Allocation Table) is to be allocated. |
| ieee8021MstpFidToMstiTable | 1.3.111.2.802.1.1.6.1.5 | not-accessible | In an MSTP Bridge, the fixed-length FID to MSTID Allocation Table entry. Each entry in the Table corresponds to a FID, and the value of the entry specifies the MSTID of the spanning tree to which the set of VLANs supported by that FID are assigned. A value of zero in an entry specifies that the set of VLANs supported by that FID are assigned to the CST. 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(3). | |
| OID ieee8021MstpFidToMstiV2ComponentId | 1.3.111.2.802.1.1.6.1.9.1.1 | 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. |
| ieee8021MstpFidToMstiV2Entry | 1.3.111.2.802.1.1.6.1.9.1 | not-accessible | In an MSTP Bridge, a FID to MSTID Allocation Table entry. | |
| U32 ieee8021MstpFidToMstiV2Fid | 1.3.111.2.802.1.1.6.1.9.1.2 | Unsigned32 | not-accessible | In an MSTP Bridge, the FID of the entry in the FID to MSTID Allocation Table. |
| ieee8021MstpFidToMstiV2Group | 1.3.111.2.802.1.1.6.2.1.9 | Objects for the MST FID to MSTID Allocation Table group for SPB | ||
| U32 ieee8021MstpFidToMstiV2MstId | 1.3.111.2.802.1.1.6.1.9.1.3 | Unsigned32 | read-write | In an MSTP Bridge, the MSTID to which the FID (of the entry in the FID to MSTID Allocation Table) is to be allocated. In an SPT Bridge, the value 4095 is used to indicate unused (non-filtering) FIDs. |
| ieee8021MstpFidToMstiV2Table | 1.3.111.2.802.1.1.6.1.9 | not-accessible | In an MSTP Bridge, the fixed-length FID to MSTID Allocation Table entry. Each entry in the Table corresponds to a FID, and the value of the entry specifies the MSTID of the spanning tree to which the set of VLANs supported by that FID are assigned. A value of zero in an entry specifies that the set of VLANs supported by that FID are assigned to the CST. 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(3). | |
| ieee8021MstpGroup | 1.3.111.2.802.1.1.6.2.1.2 | Objects for the MST group | ||
| ieee8021MstpGroups | 1.3.111.2.802.1.1.6.2.1 | |||
| OID ieee8021MstpId | 1.3.111.2.802.1.1.6.1.2.1.2 | IEEE8021MstIdentifier | not-accessible | In an MSTP Bridge, this parameter is the MSTID, i.e., the identifier of a Spanning Tree (or MST) Instance. |
| ieee8021MstpMib | 1.3.111.2.802.1.1.6 | The Bridge MIB modules for managing devices that support IEEE Std 802.1Q multiple spanning tree groups. Unless otherwise indicated, the references in this MIB module are to IEEE Std 802.1Q. Copyright (C) IEEE (2018). This version of this MIB module is part of IEEE Std 802.1Q; see the draft itself for full legal notices. | ||
| ieee8021MstpNotifications | 1.3.111.2.802.1.1.6.0 | |||
| ieee8021MstpObjects | 1.3.111.2.802.1.1.6.1 | |||
| I32 ieee8021MstpPortAdminPathCost | 1.3.111.2.802.1.1.6.1.4.1.14 | Integer32 | read-write | In an MSTP Bridge, the administrative value of the Port's Port Path Cost parameter value for the MSTI. 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. This complements the object ieee8021MstpPortPathCost, which returns the operational value of the path cost. The value of this object MUST be retained across reinitializations of the management system. |
| OID ieee8021MstpPortComponentId | 1.3.111.2.802.1.1.6.1.4.1.1 | 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. |
| BRI ieee8021MstpPortDesignatedBridge | 1.3.111.2.802.1.1.6.1.4.1.10 | BridgeId | read-only | In an MSTP Bridge, the Designated Bridge Identifier component of the Port's MSTI port priority vector, as defined in 13.11, for the MSTI. |
| I32 ieee8021MstpPortDesignatedCost | 1.3.111.2.802.1.1.6.1.4.1.9 | Integer32 | read-only | In an MSTP Bridge, the Internal Root Path Cost component of the Port's MSTI port priority vector, as defined in 13.11, for the MSTI. |
| IEE ieee8021MstpPortDesignatedPort | 1.3.111.2.802.1.1.6.1.4.1.11 | IEEE8021BridgePortNumber | read-only | In an MSTP Bridge, the Designated Port Identifier component of the Port's MSTI port priority vector, as defined in 13.11, for the MSTI. |
| BRI ieee8021MstpPortDesignatedRoot | 1.3.111.2.802.1.1.6.1.4.1.8 | BridgeId | read-only | In an MSTP Bridge, the Regional Root Identifier component of the Port's MSTI port priority vector, as defined in 13.11, for the MSTI. |
| T/F ieee8021MstpPortDisputed | 1.3.111.2.802.1.1.6.1.4.1.13 | TruthValue | read-only | In an MSTP Bridge, the current value of the disputed variable for the MSTI for the Port. |
| ieee8021MstpPortEntry | 1.3.111.2.802.1.1.6.1.4.1 | not-accessible | A MSTP Port Table entry. | |
| ieee8021MstpPortGroup | 1.3.111.2.802.1.1.6.2.1.4 | Objects for the MST Port group | ||
| OID ieee8021MstpPortMstId | 1.3.111.2.802.1.1.6.1.4.1.2 | IEEE8021MstIdentifier | not-accessible | In an MSTP Bridge, this parameter is the MSTID, i.e., the identifier of a Spanning Tree (or MST) Instance. |
| IEE ieee8021MstpPortNum | 1.3.111.2.802.1.1.6.1.4.1.3 | IEEE8021BridgePortNumber | not-accessible | In an MSTP Bridge, the Port's Port Number parameter value for the MSTI, i.e., the number of the Bridge Port for the MSTI. |
| I32 ieee8021MstpPortPathCost | 1.3.111.2.802.1.1.6.1.4.1.7 | Integer32 | read-write | In an MSTP Bridge, the Port's Port Path Cost parameter value for the MSTI. |
| I32 ieee8021MstpPortPriority | 1.3.111.2.802.1.1.6.1.4.1.6 | Integer32 | read-write | In an MSTP Bridge, the Port's Port Priority parameter value for the MSTI, i.e., the priority field for the Port Identifier for the Port for the MSTI. |
| INT ieee8021MstpPortRole | 1.3.111.2.802.1.1.6.1.4.1.12 | INTEGER | read-only | In an MSTP Bridge, the current Port Role for the Port (i.e., Root, Alternate, Designated, or Backup), for the MSTI. |
| INT ieee8021MstpPortState | 1.3.111.2.802.1.1.6.1.4.1.5 | INTEGER | read-only | In an MSTP Bridge, the current state of the Port (i.e., Disabled, Listening, Learning, Forwarding, or Blocking), for the MSTI. |
| ieee8021MstpPortTable | 1.3.111.2.802.1.1.6.1.4 | 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(3). | |
| TIK ieee8021MstpPortUptime | 1.3.111.2.802.1.1.6.1.4.1.4 | TimeTicks | read-only | In an MSTP Bridge, the Port's Uptime parameter value for the MSTI, i.e., the count in seconds of the time elapsed since the Port was last reset or initialized (BEGIN, Annex E). |
| U32 ieee8021MstpRevisionLevel | 1.3.111.2.802.1.1.6.1.7.1.4 | Unsigned32 | read-write | In an MSTP Bridge, the Revision Level in the MST Configuration Identifier. |
| I32 ieee8021MstpRootPathCost | 1.3.111.2.802.1.1.6.1.2.1.8 | Integer32 | read-only | In an MSTP Bridge, the Root Path Cost parameter value, i.e., the path cost from the transmitting Bridge to the Root Bridge for the MSTI. |
| IEE ieee8021MstpRootPort | 1.3.111.2.802.1.1.6.1.2.1.9 | IEEE8021BridgePortNumber | read-only | In an MSTP Bridge, the Root Port parameter value, i.e., the Root Port for the MSTI. |
| ROW ieee8021MstpRowStatus | 1.3.111.2.802.1.1.6.1.2.1.15 | RowStatus | read-create | The status of the row. Read SNMPv2-TC (RFC2579) for an explanation of the possible values this object can take. The writable columns in a row cannot be changed if the row is active. All columns must have a valid value before a row can be activated. |
| ieee8021MstpTable | 1.3.111.2.802.1.1.6.1.2 | 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. Entries in this table MUST be retained across reinitializations of the management system. Note that entries can be created 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(3). | |
| TIK ieee8021MstpTimeSinceTopologyChange | 1.3.111.2.802.1.1.6.1.2.1.4 | TimeTicks | read-only | In an MSTP Bridge, count in seconds of the time elapsed since tcWhile was last non-zero for any Port for the MSTI. |
| T/F ieee8021MstpTopologyChange | 1.3.111.2.802.1.1.6.1.2.1.6 | TruthValue | read-only | In an MSTP Bridge, the Topology Change parameter value: true(1) if tcWhile is non-zero for any Port for the MSTI. |
| C64 ieee8021MstpTopologyChangesEx | 1.3.111.2.802.1.1.6.1.2.1.5 | Counter64 | read-only | In an MSTP Bridge, count of the times tcWhile has been non-zero for any Port for the MSTI since the Bridge was powered on or initialized. |
| OCT ieee8021MstpVids0 | 1.3.111.2.802.1.1.6.1.2.1.11 | OCTET STRING | read-only | 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 ieee8021MstpVids1 | 1.3.111.2.802.1.1.6.1.2.1.12 | OCTET STRING | read-only | 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 ieee8021MstpVids2 | 1.3.111.2.802.1.1.6.1.2.1.13 | OCTET STRING | read-only | 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 ieee8021MstpVids3 | 1.3.111.2.802.1.1.6.1.2.1.14 | OCTET STRING | read-only | 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. |
| OID ieee8021MstpVlanComponentId | 1.3.111.2.802.1.1.6.1.6.1.1 | 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. |
| ieee8021MstpVlanEntry | 1.3.111.2.802.1.1.6.1.6.1 | not-accessible | In an MSTP Bridge, a MST Configuration Table entry. | |
| ieee8021MstpVlanGroup | 1.3.111.2.802.1.1.6.2.1.6 | Objects for the MST Configuration Table group | ||
| IEE ieee8021MstpVlanId | 1.3.111.2.802.1.1.6.1.6.1.2 | IEEE8021VlanIndex | not-accessible | In an MSTP Bridge, the VID of the entry in the MST Configuration Table. |
| OID ieee8021MstpVlanMstId | 1.3.111.2.802.1.1.6.1.6.1.3 | IEEE8021MstIdentifier | read-only | In an MSTP Bridge, the MSTID value corresponding to the VID of the entry in the MST Configuration Table. |
| ieee8021MstpVlanTable | 1.3.111.2.802.1.1.6.1.6 | not-accessible | In an MSTP Bridge, the fixed-length (4094 elements), read-only, MST Configuration Table. Its elements are derived from other configuration information held by the Bridge; specifically, the current state of the VID to FID Allocation Table (8.8.8, 12.10.1),and the FID to MSTID Allocation Table (8.9.3, 12.12.2). Hence, changes made to either of these Tables can in turn affect the contents of the MST Configuration Table, and also affect the value of the digest element of the MST Configuration Identifier. 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(3). | |
| OID ieee8021MstpVlanV2ComponentId | 1.3.111.2.802.1.1.6.1.10.1.1 | 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. |
| ieee8021MstpVlanV2Entry | 1.3.111.2.802.1.1.6.1.10.1 | not-accessible | In an MSTP Bridge, a MST Configuration Table entry. | |
| ieee8021MstpVlanV2Group | 1.3.111.2.802.1.1.6.2.1.10 | Objects for the MST Configuration Table group for SPB | ||
| IEE ieee8021MstpVlanV2Id | 1.3.111.2.802.1.1.6.1.10.1.2 | IEEE8021VlanIndex | not-accessible | In an MSTP Bridge, the VID of the entry in the MST Configuration Table. |
| U32 ieee8021MstpVlanV2MstId | 1.3.111.2.802.1.1.6.1.10.1.3 | Unsigned32 | read-only | In an MSTP Bridge, the MSTID value corresponding to the VID of the entry in the MST Configuration Table. In an SPT Bridge, a value of 4095 is used to indicate SPVIDs. |
| ieee8021MstpVlanV2Table | 1.3.111.2.802.1.1.6.1.10 | not-accessible | In an MSTP Bridge, the fixed-length (4094 elements), read-only, MST Configuration Table. Its elements are derived from other configuration information held by the Bridge; specifically, the current state of the VID to FID Allocation Table (8.8.8, 12.10.1),and the FID to MSTID Allocation Table (8.9.3, 12.12.2). Hence, changes made to either of these Tables can in turn affect the contents of the MST Configuration Table, and also affect the value of the digest element of the MST Configuration Identifier. 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(3). |
RFC description
IEEE 802.1 MIB for Multiple Spanning Tree Protocol (MSTP/802.1s) managing multiple spanning tree instances in VLAN environments.
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