NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB

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Organization: Nortel Networks

Last Updated: 2004-02-24

Category: Spanning Tree

Description: Manages Nortel proprietary Rapid Spanning Tree Protocol port states and convergence timers as a precursor to IEEE 802.1w.

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What Is NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB?

NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB is a Nortel Networks proprietary MIB implementing Rapid Spanning Tree Protocol (RSTP) management, developed as a precursor/vendor extension ahead of the formal IEEE 802.1w standard. It exposes per-port RSTP state such as protocol migration status, admin/oper edge-port designation, admin/oper point-to-point link status, and participation state, along with bridge-wide parameters like STP version, transmit hold count, and default path cost. This is primarily a network-topology/protocol-status MIB: monitoring it lets an administrator confirm which ports are correctly designated as edge or point-to-point links, verify a port is actively participating in the spanning tree, and detect unexpected protocol migration events that could signal a topology change or misconfiguration -- a software/protocol health indicator for loop prevention rather than physical hardware status. It is explicitly built as a Nortel-proprietary precursor to the IEEE 802.1w RSTP standard and extends the base IEEE 802.1d STP MIB objects (referenced via its "Dot1d" naming), so it interoperates with or gets superseded by standard 802.1w-based MIBs on later firmware. It is typically deployed on Nortel (later Avaya/Extreme-branded) enterprise switches in campus or data center environments needing fast Layer 2 loop convergence via Rapid Spanning Tree. Network engineers evaluating or troubleshooting this functionality can download the NORTEL-NETWORKS-RAPID-SPANNING-TREE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NORTEL-NETWORKS-RAPID-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

Nortel Networks (later Avaya) enterprise switch

Monitoring Examples

An administrator would poll nnRstDot1dStpPortEntry objects such as nnRstDot1dStpPortAdminEdgePort/nnRstDot1dStpPortOperEdgePort and nnRstDot1dStpPortAdminPointToPoint/nnRstDot1dStpPortOperPointToPoint to confirm each port's RSTP role matches its intended topology (e.g., an edge port to an end host versus a point-to-point trunk link). Watching nnRstDot1dStpPortProtocolMigration and nnRstDot1dStpPortParticipating would reveal unexpected STP recalculation events or a port dropping out of the spanning tree, indicating a potential loop or link flap.

What Can Be Monitored

per-port RSTP admin/oper edge-port status
per-port point-to-point link status
STP protocol migration events
port spanning-tree participation state
STP version and transmit hold count

Imported Objects

From BRIDGE-MIB

BridgeId
Timeout
dot1dBaseBridgeAddress	OBJECT-TYPE
dot1dStpDesignatedRoot	OBJECT-TYPE
dot1dStpPort

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

From SYNOPTICS-ROOT-MIB

bayStackMibs

OBJECT-IDENTITY

How to Use in IPNetwork Monitor

Example using nnRstDot1wRstpUpCount OID:

Select a Nortel Networks (later Avaya) enterprise switch (RSTP) 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 nnRstDot1wRstpUpCount into the Find box to locate it in the OID tree, then select it and click OK. The number of times RSTP Module has been enabled. 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 Counter32-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, 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
nnRapidSpanningTreeMib	1.3.6.1.4.1.45.5.4			Nortel Networks Rapid Spanning-Tree MIB Copyright 2003 Nortel Networks, Inc. All rights reserved. This Nortel Networks SNMP Management Information Base Specification embodies Nortel Networks' confidential and proprietary intellectual property. Nortel Networks retains all title and ownership in the Specification, including any revisions. This Specification is supplied 'AS IS,' and Nortel Networks makes no warranty, either express or implied, as to the use, operation, condition, or performance of the Specification.
nnRstNotifications	1.3.6.1.4.1.45.5.4.0
NTF nnRstGeneralEvent	1.3.6.1.4.1.45.5.4.0.1			Generated when any of the general events like protocol up or protocol down occurs
NTF nnRstErrorEvent	1.3.6.1.4.1.45.5.4.0.2			Generated when any of the error events like memory failure or buffer failure or protocol migration or new root or topology change occurs
NTF nnRstNewRoot	1.3.6.1.4.1.45.5.4.0.3			Generated whenever a new root bridge is selected in the topology
NTF nnRstTopologyChange	1.3.6.1.4.1.45.5.4.0.4			Generated when topology change is detected
NTF nnRstProtocolMigration	1.3.6.1.4.1.45.5.4.0.5			Generated when port protocol migration happens in the port
nnRstObjects	1.3.6.1.4.1.45.5.4.1
nnRstDot1d	1.3.6.1.4.1.45.5.4.1.1
nnRstDot1dScalars	1.3.6.1.4.1.45.5.4.1.1.1
INT nnRstDot1dStpVersion	1.3.6.1.4.1.45.5.4.1.1.1.1	INTEGER	read-write	The version of Spanning Tree Protocol the bridge is currently running. The value 'stpCompatible(0)' indicates the Spanning Tree Protocol specified in IEEE 802.1D and 'rstp(2)' indicates the Rapid Spanning Tree Protocol specified in IEEE 802.1w. New value may be defined as future versions of the protocol become available.
INT nnRstDot1dStpTxHoldCount	1.3.6.1.4.1.45.5.4.1.1.1.2	INTEGER	read-write	The value used by the Port Transmit state machine to limit the maximum transmission rate.
INT nnRstDot1dStpPathCostDefault	1.3.6.1.4.1.45.5.4.1.1.1.3	INTEGER	read-write	The version of the Spanning Tree default Path Costs that are to be used by this Bridge. A value of 8021d1998(1) uses the 16-bit default Path Costs from IEEE Std. 802.1D-1998. A value of stp8021t2001(2) uses the 32-bit default Path Costs from IEEE Std. 802.1t.
nnRstDot1dStpPortTable	1.3.6.1.4.1.45.5.4.1.1.2		not-accessible	A table that contains port-specific Rapid Spanning Tree information.
nnRstDot1dStpPortEntry	1.3.6.1.4.1.45.5.4.1.1.2.1		not-accessible	A list of Rapid Spanning Tree information maintained by each port.
T/F nnRstDot1dStpPortProtocolMigration	1.3.6.1.4.1.45.5.4.1.1.2.1.1	TruthValue	read-write	When operating in RSTP (version 2) mode, writing TRUE(1) to this object forces this port to transmit RSTP BPDUs. Any other operation on this object has no effect and it always returns FALSE(2) when read.
T/F nnRstDot1dStpPortAdminEdgePort	1.3.6.1.4.1.45.5.4.1.1.2.1.2	TruthValue	read-write	The administrative value of the Edge Port parameter. A value of TRUE(1) indicates that this port should be assumed as an edge-port and a value of FALSE(2) indicates that this port should be assumed as a non-edge-port.
T/F nnRstDot1dStpPortOperEdgePort	1.3.6.1.4.1.45.5.4.1.1.2.1.3	TruthValue	read-only	The operational value of the Edge Port parameter. The object is initialized to the value of nnRstDot1dStpPortAdminEdgePort and is set FALSE on reception of a BPDU.
INT nnRstDot1dStpPortAdminPointToPoint	1.3.6.1.4.1.45.5.4.1.1.2.1.4	INTEGER	read-write	The administrative point-to-point status of the LAN segment attached to this port. A value of forceTrue(0) indicates that this port should always be treated as if it is connected to a point-to-point link. A value of forceFalse(1) indicates that this port should be treated as having a shared media connection. A value of auto(2) indicates that this port is considered to have a point-to-point link if it is an Aggregator and all of its members are aggregatable, or if the MAC entity is configured for full duplex operation, either through auto-negotiation or by management means.
T/F nnRstDot1dStpPortOperPointToPoint	1.3.6.1.4.1.45.5.4.1.1.2.1.5	TruthValue	read-only	The operational point-to-point status of the LAN segment attached to this port. It indicates whether a port is considered to have a point-to-point connection or not. The value is determined by management or by auto-detection, as described in the nnRstDot1dStpPortAdminPointToPoint object.
T/F nnRstDot1dStpPortParticipating	1.3.6.1.4.1.45.5.4.1.1.2.1.6	TruthValue	read-write	This object specifies whether a port is participating in the 802.1w protocol.
nnRstDot1w	1.3.6.1.4.1.45.5.4.1.2
nnRstDot1wScalars	1.3.6.1.4.1.45.5.4.1.2.1
C32 nnRstDot1wRstpUpCountEx	1.3.6.1.4.1.45.5.4.1.2.1.1	Counter32	read-only	The number of times RSTP Module has been enabled. A Trap is generated on the occurence of this event.
C32 nnRstDot1wRstpDownCount	1.3.6.1.4.1.45.5.4.1.2.1.2	Counter32	read-only	The number of times RSTP Module has been disabled. A Trap is generated on the occurence of this event.
C32 nnRstDot1wNewRootIdCount	1.3.6.1.4.1.45.5.4.1.2.1.3	Counter32	read-only	The number of times this Bridge has detected a Root Identifier change. A Trap is generated on the occurence of this event.
INT nnRstDot1wPortRoleSelSmState	1.3.6.1.4.1.45.5.4.1.2.1.4	INTEGER	read-only	This indicates the current state of the Port Role Selection State Machine. This object will hold the value 'initbridge' when the Port Role Selection state machine is in the INIT_BRIDGE state and the value of 'roleselection' when the state machine is in the ROLE_SELECTION state.
BRI nnRstDot1wOldDesignatedRoot	1.3.6.1.4.1.45.5.4.1.2.1.5	BridgeId	read-only	The bridge identifier of the old root of the spanning tree as determined by the Spanning Tree Protocol as executed by this node.
nnRstDot1wPortTable	1.3.6.1.4.1.45.5.4.1.2.2		not-accessible	This is a table that is an extension to the nnRstDot1dStpPortTable. This contains object(s) that are Port-based.
nnRstDot1wPortEntry	1.3.6.1.4.1.45.5.4.1.2.2.1		not-accessible	Each entry in this table is for each port present in the system. This table is indexed by the nnRstDot1wPort.
I32 nnRstDot1wPort	1.3.6.1.4.1.45.5.4.1.2.2.1.1	Integer32	not-accessible	A unique value, greater than zero, indicating the Port number.
INT nnRstDot1wPortRole	1.3.6.1.4.1.45.5.4.1.2.2.1.2	INTEGER	read-only	This indicates the current Port Role assumed by this Port.
INT nnRstDot1wPortOperVersion	1.3.6.1.4.1.45.5.4.1.2.2.1.3	INTEGER	read-only	This indicates whether the Port is operationally in the Rstp mode or the Stp-compatible mode i.e., whether the Port is transmitting RST BPDUs or Config/TCN BPDUs.
INT nnRstDot1wPortInfoSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.4	INTEGER	read-only	This indicates the current state of the Port Information state machine. This object will hold the value 'disabled' when the Port Information state machine is in the DISABLED state, the value 'aged' when the state machine is in the AGED state, the value 'update' when the state machine is in the UPDATE state, the value 'superior' when the state machine is in the SUPERIOR state, the value 'repeat' when the state machine is in the REPEAT state, the value 'agreement' when the state machine is in the AGREEMENT state, the value 'present' when the state machine is in the CURRENT state and the value 'receive' when the state machine is in the RECEIVE state.
INT nnRstDot1wPortMigSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.5	INTEGER	read-only	This indicates the current state of the Port Protocol Migration state machine. This object will hold the value 'init' when the Protocol Migration state machine is in the INIT state, the value 'sendrstp' when the state machine is in the SEND_RSTP state, the value 'sendingrstp' when the state machine is in the SENDING_RSTP state, the value 'sendstp' when the state machine is in the SEND_STP state and the value 'sendingstp' when the state machine is in the SENDING_STP state.
INT nnRstDot1wPortRoleTransSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.6	INTEGER	read-only	This indicates the current state of the Port Role Transition state machine. This object will hold the value 'init' when the Port Role Transition state machine is in the INIT state, the value 'blockport' when the state machine is in the BLOCK_PORT state, the value 'blockedport' when the state machine is in the BLOCKED_PORT state, the value 'rootport' when the state machine is in the ROOT_PORT state, the value 'desgport' when the state machine is in the DESIGNATED_PORT state, the value 'backupport' when the state machine is in BACKUP_PORT state, the value 'rootproposed' when the state machine is in the ROOT_PROPOSED state, the value 'rootagreed' when the state machine is in the ROOT_AGREED state, the value 'reroot' when the state machine is in the REROOT state, the value 'rootforward' when the state machine is in the ROOT_FORWARD state, the value 'rootlearn' when the state machine is in the ROOT_LEARN state, the value 'rerooted' when the state machine is in the REROOTED state, the value 'designatedpropose' when the state machine is in the DESIGNATED_PROPOSE state, the value 'designatedsynced' when the state machine is in the DESIGNATED_SYNCED state, the value 'designatedretired' when the state machine is in the DESIGNATED_RETIRED state, the value 'designatedforward' when the state machine is in the DESIGNATED_FORWARD state, the value 'designatedlearn' when the state machine is in the DESIGNATED_LEARN state and the value 'designatedlisten' when the state machine is in the DESIGNATED_LISTEN state.
INT nnRstDot1wPortStateTransSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.7	INTEGER	read-only	This indicates the current state of the Port State Transition state machine. This object will hold the value 'discarding' when the Port State Transition state machine is in the DISCARDING state, the value 'learning' when the state machine is in the LEARNING state and the value 'forwarding' when the state machine is in the FORWARDING state.
INT nnRstDot1wPortTopoChSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.8	INTEGER	read-only	This indicates the current state of the Topology Change state machine. This object will hold the value 'init' when the Topology Change state machine is in the INIT state, the value 'inactive' when the state machine is in the INACTIVE state, the value 'active' when the state machine is in the ACTIVE state, the value 'detected' when the state machine is in the DETECTED state, the value 'notifiedtcn' when the state machine is in the NOTIFIED_TCN state, the value 'notifiedtc' when the state machine is in the NOTIFIED_TC state, the value 'propagating' state when the state machine is in the PROPAGATING state and the value 'acknowledged' when the state machine is in the ACKNOWLEDGED state.
INT nnRstDot1wPortTxSmState	1.3.6.1.4.1.45.5.4.1.2.2.1.9	INTEGER	read-only	This indicates the current state of the Port Transmit state machine. This object will hold the value 'transmitinit' when the Port Transmit state machine is in the TRANSMIT_INIT state, the value 'transmitperiodic' when the state machine is in the TRANSMIT_PERIODIC state, the value 'transmitconfig' when the state machine is in the TRANSMIT_CONFIG state, the value 'transmittcn', when the state machine is in the TRANSMIT_TCN state, the value 'transmitrstp', when the state machine is in the TRANSMIT_RSTP state and the value 'idle' when the state machine is in the IDLE state.
C32 nnRstDot1wPortRxRstBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.10	Counter32	read-only	The number of RST BPDUs that have been received on this Port.
C32 nnRstDot1wPortRxConfigBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.11	Counter32	read-only	The number of Config BPDUs that have been received on this Port.
C32 nnRstDot1wPortRxTcnBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.12	Counter32	read-only	The number of TCN BPDUs that have been received on this Port.
C32 nnRstDot1wPortTxRstBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.13	Counter32	read-only	The number of RST BPDUs that have been transmitted by this Port.
C32 nnRstDot1wPortTxConfigBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.14	Counter32	read-only	The number of Config BPDUs that have been transmitted by this Port.
C32 nnRstDot1wPortTxTcnBpduCount	1.3.6.1.4.1.45.5.4.1.2.2.1.15	Counter32	read-only	The number of TCN BPDUs that have been transmitted by this Port.
C32 nnRstDot1wPortInvalidRstBpduRxCount	1.3.6.1.4.1.45.5.4.1.2.2.1.16	Counter32	read-only	The number of invalid RSTP BPDUs that have been received on this Port. A Trap is generated on the occurence of this event.
C32 nnRstDot1wPortInvalidConfigBpduRxCount	1.3.6.1.4.1.45.5.4.1.2.2.1.17	Counter32	read-only	The number of invalid Configuration BPDUs that have been received on this Port. A Trap is generated on the occurence of this event.
C32 nnRstDot1wPortInvalidTcnBpduRxCount	1.3.6.1.4.1.45.5.4.1.2.2.1.18	Counter32	read-only	The number of invalid TCN BPDUs that have been received on this Port. A Trap is generated on the occurence of this event.
C32 nnRstDot1wPortProtocolMigrationCount	1.3.6.1.4.1.45.5.4.1.2.2.1.19	Counter32	read-only	The number of times this Port has migrated from one STP protocol version to another. The relevant protocols are STP-COMPATIBLE and RSTP. A Trap is generated on the occurence of this event.
T/F nnRstDot1wPortEffectivePortState	1.3.6.1.4.1.45.5.4.1.2.2.1.20	TruthValue	read-only	The effective Operational state of the port. This object will be set to TRUE only when the port is operationally up in the interface manager and the force Port State for this port and specified port state is enabled. Otherwise this object is set to FALSE.
nnRstNotificationControl	1.3.6.1.4.1.45.5.4.1.3
nnRstNotificationControlScalars	1.3.6.1.4.1.45.5.4.1.3.1
I32 nnRstSetNotifications	1.3.6.1.4.1.45.5.4.1.3.1.1	Integer32	read-write	This object is used to enable and disable specific RSTP traps. Currently the following are defined 0 - Notifications are not enabled. 1 - General Notifications like protocol up or down 2 - Exception Notifications like memory failure or buffer failure or port protocol migration or invalid packet rcvd in port 3 - All the above Notifications
INT nnRstGenNotificationType	1.3.6.1.4.1.45.5.4.1.3.1.2	INTEGER	read-only	The general events like none - none of the below values up - protocol UP, down - protocol DOWN
INT nnRstErrNotificationType	1.3.6.1.4.1.45.5.4.1.3.1.3	INTEGER	read-only	The error event like none - none of the below values memfail - memory allocation failure bufffail - buffer allocation failure
nnRstPortNotificationTable	1.3.6.1.4.1.45.5.4.1.3.2		not-accessible	This table is used to store the notification information occured in each of the port for protocol migration and invalid packet received
nnRstPortNotificationEntry	1.3.6.1.4.1.45.5.4.1.3.2.1		not-accessible	This entry is used to store the notification information
I32 nnRstPortNotificationIndex	1.3.6.1.4.1.45.5.4.1.3.2.1.1	Integer32	not-accessible	A unique value, greater than zero, indicating the Port number.
INT nnRstPortNotificationMigrationType	1.3.6.1.4.1.45.5.4.1.3.2.1.2	INTEGER	read-only	Port Protocol migration type occured in the port
INT nnRstPortNotificationPktErrType	1.3.6.1.4.1.45.5.4.1.3.2.1.3	INTEGER	read-only	Type of invalid packet received in each of the port
I32 nnRstPortNotificationPktErrVal	1.3.6.1.4.1.45.5.4.1.3.2.1.4	Integer32	read-only	Packet error value corresponding to the above type

RFC description

Nortel Networks Rapid Spanning Tree MIB extending IEEE 802.1w RSTP support.

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