TN-ETH-RING-MIB

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Organization: Nokia

Last Updated: 2016-03-15

Category: Nokia Carrier Ethernet

Description: Manages Nokia carrier Ethernet ring protection switching instance and port state.

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What Is TN-ETH-RING-MIB?

This is a Nokia proprietary MIB (branded "TN" for the 7x50 device family) managing Ethernet Ring Protection Switching for carrier Ethernet rings, functionally paralleling the analogous TIMETRA MIB. It exposes ring configuration -- index, description, guard time, revert time and its countdown, and CCM (Continuity Check Message) hold-down time -- alongside per-ring administrative and operational state. Its monitoring emphasis is on ring protocol health: tnEthRingAdminState versus tnEthRingOperState shows whether a configured ring is actually passing traffic, tnEthRingRevertTimeCountDn shows recovery progress after a fault, and tnEthRingCcmHoldDownTime affects how quickly a link failure is detected via continuity checks. As a Nokia SROS-family extension it depends on the underlying Ethernet/CFM conventions used across the 7x50 product line. It's typically deployed on Nokia 7x50 nodes in metro Ethernet ring topologies requiring sub-50ms protection switching. Engineers can download the TN-ETH-RING-MIB file directly to load it into their MIB browser.

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

Nokia 1830 PSS (Photonic Service Switch) optical transport platform

Monitoring Examples

An operator polls tnEthRingConfigTable / tnEthRingConfigEntry keyed by tnEthRingIndex to compare tnEthRingAdminState against tnEthRingOperState, catching a ring that is enabled but not actually protecting traffic. Watching tnEthRingRevertTimeCountDn during a tnEthRingRevertTime window shows the ring's progress reverting to its idle topology after a fault clears, and tnEthRingCcmHoldDownTime is checked when diagnosing whether continuity-check-based fault detection is too slow or too aggressive for the deployed ring.

What Can Be Monitored

ring admin state
ring operational state
guard time
revert time countdown
CCM hold-down time

Imported Objects

From IF-MIB

InterfaceIndexOrZero

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

MacAddress
RowStatus
TEXTUAL-CONVENTION
TimeStamp
TruthValue

From TN-SAP-MIB

tnSapEncapValue	OBJECT-TYPE
tnSapPortId	OBJECT-TYPE

From TN-SERV-MIB

tnSvcId

OBJECT-TYPE

From TN-TC-MIB

TItemDescription
TmnxAdminState
TmnxEncapVal
TmnxOperState

From TROPIC-GLOBAL-REG

tnSRMIBModules	OBJECT-IDENTITY
tnSRNotifyPrefix	OBJECT-IDENTITY
tnSRObjs	OBJECT-IDENTITY

From TROPIC-SYSTEM-MIB

tnSysSwitchId

OBJECT-TYPE

OIDs

OID symbolic	OID numeric	Type	Access	Description
tnEthRingMIBModule	1.3.6.1.4.1.7483.5.1.3.72			This document is the SNMP MIB module to manage and provision the Ethernet Ring components of the Nokia 7x50 device. Copyright (c) 2009-2010 Nokia. All rights reserved. Reproduction of this document is authorized on the condition that the foregoing copyright notice is included. This SNMP MIB module (Specification) embodies Nokia's proprietary intellectual property. Nokia retains all title and ownership in the Specification, including any revisions. Nokia grants all interested parties a non-exclusive license to use and distribute an unmodified copy of this Specification in connection with management of Nokia products, and without fee, provided this copyright notice and license appear on all copies. This Specification is supplied 'as is', and Nokia makes no warranty, either express or implied, as to the use, operation, condition, or performance of the Specification.
tnEthRingObjs	1.3.6.1.4.1.7483.6.1.2.72
tnEthRingConfigurations	1.3.6.1.4.1.7483.6.1.2.72.1
tnEthRingConfigTable	1.3.6.1.4.1.7483.6.1.2.72.1.1		not-accessible	The tnEthRingConfigTable consists of the Ethernet Ring configuration information.
tnEthRingConfigEntry	1.3.6.1.4.1.7483.6.1.2.72.1.1.1		not-accessible	The tnEthRingConfigEntry contains information pertaining to an individual Ethernet Ring. Rows in this table are created and destroyed using the tnEthRingRowStatus object.
TNE tnEthRingIndex	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.1	TnEthRingIndex	not-accessible	The value of tnEthRingIndex specifies the row index of the Ethernet Ring Group.
ROW tnEthRingRowStatus	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.2	RowStatus	read-create	The value of tnEthRingRowStatus controls the creation and deletion of row entries in the tnEthRingConfigTable.
TIM tnEthRingTimeStamp	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.3	TimeStamp	read-only	The value of tnEthRingTimeStamp indicates the time, since system startup, of the last change to this row.
TIT tnEthRingDescription	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.4	TItemDescription	read-create	The value of tnEthRingDescription specifies the user supplied description of the Ethernet Ring.
TMN tnEthRingAdminState	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.5	TmnxAdminState	read-create	The value of tnEthRingAdminState specifies the administrative state of the Ethernet Ring.
TMN tnEthRingOperState	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.6	TmnxOperState	read-only	The value of tnEthRingOperState indicates the operational state of the Ethernet Ring.
U32 tnEthRingGuardTime	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.7	Unsigned32	read-create	The value of tnEthRingGuardTime specifies the guard timer, in deciseconds, of a Ring-APS (R-APS) node. The guard timer is used to prevent the Ethernet Ring node from acting upon outdated R-APS messages and prevent the possibility of forming a closed loop. While the guard timer is running, any received R-APS Request/State and Status information is blocked and not forwarded to the Priority Logic. When the guard timer is not running, the R-APS Request/State and Status information is forwarded unchanged.
U32 tnEthRingRevertTime	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.8	Unsigned32	read-create	The value of tnEthRingRevertTime specifies the Wait-To-Restore (WTR) timer, in seconds, of a Ring-APS (R-APS) node. The WTR timer is used to prevent frequent operation of the protection switching due to intermittent signal failure defects. Setting tnEthRingRevertTime to the value zero (0) puts the Ethernet Ring into a non-revertive mode.
U32 tnEthRingRevertTimeCountDn	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.9	Unsigned32	read-only	The value of tnEthRingRevertTimeCountDn indicates the remaining time, in seconds, before the Ethernet Ring can revert to its original state.
U32 tnEthRingCcmHoldDownTime	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.10	Unsigned32	read-create	The value of tnEthRingCcmHoldDownTime specifies the time, in centiseconds, used for the hold-timer for associated Continuity Check (CC) Session down event dampening. This guards against reporting excessive path operational state transitions. This is implemented by not advertising subsequent transitions of the CC state to the Ethernet Ring Node until the configured timer has expired. A value of zero (0) specifies that a down transition is reported immediately.
U32 tnEthRingCcmHoldUpTime	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.11	Unsigned32	read-create	The value of tnEthRingCcmHoldUpTime specifies the time, in deciseconds, used for the hold-timer for associated Continuity Check (CC) Session up event dampening. This guards against reporting excessive path operational state transitions. This is implemented by not advertising subsequent transitions of the CC state to the Ethernet Ring Node until the configured timer has expired. A value of zero (0) specifies that an up transition is reported immediately.
TNE tnEthRingRplNode	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.12	TnEthRingRplNodeType	read-create	The value of tnEthRingRplNode specifies the Ring Protection Link (RPL) type of the Ethernet Ring Node.
MAC tnEthRingNodeId	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.13	MacAddress	read-create	The value of tnEthRingNodeId specifies the Ethernet Ring Node ID The default value is the system's MAC address. Writing the MAC address value 00:00:00:00:00:00 to tnEthRingNodeId will reset its value to the system's MAC address.
TNE tnEthRingTxApsPdu	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.14	TnEthRingApsInfoType	read-only	The value of tnEthRingTxApsPdu indicates the contents of the R-APS PDU transmitted on the Ethernet Ring.
BIT tnEthRingDefectStatus	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.15	Bits	read-only	The value of tnEthRingDefectStatus indicates what defects are active on the Ethernet Ring. The defects are defined as: dFopPM -- Provisioning Mismatch
INT tnEthRingSubRingType	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.16	INTEGER	read-create	The value of tnEthRingSubRingType specifies whether this Ethernet Ring is a sub-ring or not. A value of 'none (0)' specifies that the Ethernet Ring is not a sub-ring. A value 'virtualLink (1)' specifies that the Ethernet Ring is a sub-ring with R-APS virtual channel, while the value 'nonVirtualLink (2)' specifies that the Ethernet Ring is a sub-ring without R-APS virtual channel. This object MUST be set to a value other than 'none (0)' for tnEthRingSubRingInterconnectId and tnEthRingSubRingPropTopChange to be modified away from their default values.
U32 tnEthRingSubRingInterconnectId	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.17	Unsigned32	read-create	The value of tnEthRingSubRingInterconnectId specifies whether the Ethernet sub-ring is interconnected to an Ethernet Ring, as identified by the Ethernet Ring ID, a VPLS service (4294967295), or is not interconnected (0). A sub-ring can only be interconnected to a VPLS service (i.e. tnEthRingSubRingInterconnectId assigned the value 4294967295), if tnEthRingSubRingType is assigned the value 'nonVirtualLink (2)'. This object MUST be set to a value other than zero (0) for tnEthRingSubRingPropTopChange to be modified away from its default value. Attempts to modify this object away from its default value when tnEthRingSubRingType is set to 'none (0)' will result in an SNMP inconsistentValue error.
T/F tnEthRingSubRingPropTopChange	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.18	TruthValue	read-create	The value of tnEthRingSubRingPropTopChange specifies whether or not the Ethernet sub-ring propagates topology changes to the interconnected ring as specified by the value of tnEthRingSubRingInterconnectId. Attempts to modify this object away from its default value when tnEthRingSubRingInterconnectId is set to zero (0) will result in an SNMP inconsistentValue error.
INT tnEthRingCompatibleVersion	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.19	INTEGER	read-create	The value of tnEthRingCompatibleVersion specifies the backward compatibility logic for the Ethernet Ring. If this object is set to 'version1 (1)' then: 1. Attempts at setting tnEthRingCommandSwitch to the value 'forceSwitch (2)' or 'manualSwitch (3)' will result in an inconsistentValue error, and 2. Attempts at setting tnEthRingRevertTime to the value zero (0) will result in an inconsistentValue error. If this object is set to 'version2 (2)' then the above restrictions will not apply.
INT tnEthRingState	1.3.6.1.4.1.7483.6.1.2.72.1.1.1.20	INTEGER	read-only	The value of tnEthRingState indicates the current state of ERP instance, valid on all ERP Ring nodes. It is a combination of ERP Instance activation state and the state of the ERP Protocol.
tnEthRingPathTable	1.3.6.1.4.1.7483.6.1.2.72.1.3		not-accessible	The tnEthRingPathTable consists of the paths associated with the corresponding tnEthRingConfigEntry.
tnEthRingPathEntry	1.3.6.1.4.1.7483.6.1.2.72.1.3.1		not-accessible	The tnEthRingPathEntry contains information pertaining to an individual path associated with a tnEthRingConfigEntry. Rows in this table are created and destroyed using the tnEthRingPathRowStatus object.
TNE tnEthRingPathIndex	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.1	TnEthRingPathIndex	not-accessible	The tnEthRingPathIndex specifies the row index of the member.
ROW tnEthRingPathRowStatus	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.2	RowStatus	read-create	The tnEthRingPathRowStatus, along with tnEthRingPathIfIndex and tnEthRingPathIfRapsCcTag, control the creation and deletion of row entries in the tnEthRingPathTable.
TIM tnEthRingPathTimeStamp	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.3	TimeStamp	read-only	The value of tnEthRingPathTimeStamp indicates the time, since system startup, of the last change to this row.
NUM tnEthRingPathIfIndex	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.4	InterfaceIndexOrZero	read-create	The value of tnEthRingPathIfIndex specifies the member's port tmnxPortPortID associated with the tnEthRingConfigEntry. This object must be included in the same SNMP PDU as that of the tnEthRingPathRowStatus object for creation of the path. The absense of this object will result in a NO CREATION error. The tnEthRingPathIfIndex can not be changed; the row must be destroyed and re-created.
TMN tnEthRingPathIfRapsCcTag	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.5	TmnxEncapVal	read-create	The value of tnEthRingPathIfRapsCcTag specifies the member's encapsulation. This object must be included in the same SNMP PDU as that of the tnEthRingPathRowStatus object for creation of the path. The absense of this object will result in a NO CREATION ERROR Once specified, the tnEthRingPathIfRapsCcTag can not be changed; the row must be destroyed and re-created.
TIT tnEthRingPathDescription	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.6	TItemDescription	read-create	The value of tnEthRingPathDescription specifies a detailed description of the Ethernet Ring path.
TMN tnEthRingPathAdminStatus	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.7	TmnxAdminState	read-create	The value of tnEthRingPathAdminStatus specifies the administrative state of the path. 'outOfService (3)' specifies that the member will not partake in Ring Redundancy.
TMN tnEthRingPathOperStatus	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.8	TmnxOperState	read-only	The tnEthRingPathOperStatus indicates the operational state of of the path. The tnEthRingPathOperStatus supports the following two TmnxOperState values: inService (2) outOfService (3)
INT tnEthRingPathType	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.9	INTEGER	read-create	The value of tnEthRingPathType specifies the Ethernet Ring Node Path acts as an rplEnd or in a normal state. This is only configurable if tnEthRingRplNode is set to 'rplOwner (1)' or 'rplNeighbor (2)'.
INT tnEthRingPathFwdState	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.10	INTEGER	read-only	The value of tnEthRingPathFwdState indicates whether the Ethernet Ring Node Path blocks the transmission and reception of traffic on the ring port.
TIM tnEthRingPathFwdStateChgTime	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.11	TimeStamp	read-only	The value of tnEthRingPathFwdStateChgTime indicates the time, since system startup, that the Ethernet Ring Path last experienced a change in the forwarding state.
TNE tnEthRingPathRxApsPdu	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.12	TnEthRingApsInfoType	read-only	The value of tnEthRingPathRxApsPdu indicates the contents of the R-APS PDU received on the Ethernet Ring path.
INT tnEthRingPortState	1.3.6.1.4.1.7483.6.1.2.72.1.3.1.13	INTEGER	read-only	The value of tnEthRingPortState indicates the current state of ERP Port or an EPR instance. It is a combination of port administrative state and the state of the Ring Port.
tnEthRingSAPConfigs	1.3.6.1.4.1.7483.6.1.2.72.1.4
tnEthRingSAPPathTable	1.3.6.1.4.1.7483.6.1.2.72.1.4.1		not-accessible	The tnEthRingSAPPathTable consists of the configuration for Ethernet Ring Group members associated to SAPs.
tnEthRingSAPPathEntry	1.3.6.1.4.1.7483.6.1.2.72.1.4.1.1		not-accessible	The tnEthRingSAPPathEntry contains the SAP information pertaining to an Ethernet Ring Group member. Entries in the tnEthRingSAPPathTable are created and destroyed by the system when the TIMETRA-SAP-MIB::sapEthRingIndex is set to a non-zero value during the creation of a row in the TIMETRA-SAP-MIB::sapBaseInfoTable.
U32 tnEthRingSAPPathIndex	1.3.6.1.4.1.7483.6.1.2.72.1.4.1.1.1	Unsigned32	read-only	The value of tnEthRingSAPPathIndex indicates the corresponding path index of the tnEthRingPathEntry for this row.
T/F tnEthRingSAPPathControlFlag	1.3.6.1.4.1.7483.6.1.2.72.1.4.1.1.2	TruthValue	read-only	The value of tnEthRingSAPPathControlFlag indicates whether or not this row corresponds to the control SAP of the tnEthRingConfigEntry.
tnEthRingCommandTable	1.3.6.1.4.1.7483.6.1.2.72.1.5		not-accessible	The tnEthRingCommandTable consists of the one-shot action commands that effect the state of the Ethernet Ring operation.
tnEthRingCommandEntry	1.3.6.1.4.1.7483.6.1.2.72.1.5.1		not-accessible	The tnEthRingCommandEntry contains the commands available to execute on an existing Ethernet Ring Group Path. Rows in this table are created and destroyed by the system.
INT tnEthRingCommandSwitch	1.3.6.1.4.1.7483.6.1.2.72.1.5.1.1	INTEGER	read-create	The value of tnEthRingCommandSwitch specifies the switch command to initiate on a path of an Ethernet Ring Group. When read, this object returns the last command written or 'noCmd (0)' if no command has been written to this Ethernet Ring Group path since initialization. The return of the last command written does not imply that this command is currently in effect. The request may be preempted by a higher priority local or remote request. In order to determine the current state of the group it is necessary to read the objects tnEthRingPathRxApsPdu and tnEthRingTxApsPdu. The value 'noCmd (0)' may not be used in a write command. The value 'clear (1)' clears all the switch commands listed below for the specified ring, regardless of the specified path. In addition, if tnEthRingRevertTime is a non-zero value (revertive mode) the active WTR (Wait To Restore) state is also cleared, or in the case of non-revertive mode, the command will trigger a reversion. The 'clear (1)' command is only valid if at least one path is configured and either: 1. a local Forced Switch or Manual Switch command is in effect, or 2. a local Ethernet Ring Node is an RPL Owner Node and top priority request is neither R-APS (FS) nor R-APS (MS). The value 'forceSwitch (2)' forces the specified path's tnEthRingPathFwdState to the 'blocked (1)' state. The value 'manualSwitch (3)' sets the specified path's tnEthRingPathFwdState to the 'blocked (1)' state in the absence of a failure or forceSwitch. An inconsistentValue error is returned, otherwise.
U32 tnEthRingConfigurationsScalar1	1.3.6.1.4.1.7483.6.1.2.72.1.101	Unsigned32	read-only	A dummy scalar that satisfies a SNMP get request quickly when there is no 11QPE24 card provisioned. Otherwise, it has to traverse the remaining 11QPE24 MIB to get to the next applicable item.
U32 tnEthRingConfigurationsScalar2	1.3.6.1.4.1.7483.6.1.2.72.1.102	Unsigned32	read-only
tnEthRingNotifyPrefix	1.3.6.1.4.1.7483.6.1.3.72
tnEthRingNotifications	1.3.6.1.4.1.7483.6.1.3.72.0
tnEthRingOprNotifications	1.3.6.1.4.1.7483.6.1.3.72.0.1
NTF tnEthRingPathFwdStateChange	1.3.6.1.4.1.7483.6.1.3.72.0.1.1			The tnEthRingPathFwdStateChange is generated when an Ethernet Ring Path changes its forwarding state (tnEthRingPathFwdState) from blocked to unblocked or from unblocked to blocked.
tnEthRingApsNotifications	1.3.6.1.4.1.7483.6.1.3.72.0.2
NTF tnEthRingApsPrvsnRaiseAlarm	1.3.6.1.4.1.7483.6.1.3.72.0.2.1			The tnEthRingApsPrvsnRaiseAlarm is generated when an Ethernet Ring provisioning mismatch is detected. A mismatch occurs when the RPL Owner Node receives one or more No Request R-APS message(s) with RPL Blocked status flag set (NR,RB) and a Node ID that differs from its own.
NTF tnEthRingApsPrvsnClearAlarm	1.3.6.1.4.1.7483.6.1.3.72.0.2.2			The tnEthRingApsPrvsnClearAlarm is generated when an Ethernet Ring provisioning mismatch is cleared.

RFC description

Manages Ethernet Ring components and topology protection on Nokia 7x50 carrier-class devices.

Start monitoring Nokia 7x50 carrier Ethernet node (Ethernet ring protection admin/oper 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-ETH-RING-MIB

What Is TN-ETH-RING-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description