PRVT-EPS-MIB

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Organization: BATM Advanced Communication

Last Updated: 2010-11-11

Category: Protection and Redundancy

Description: Manages BATM Advanced Communication Ethernet Protection Switching (EPS) linear protection groups and switchover configuration.

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What Is PRVT-EPS-MIB?

PRVT-EPS-MIB is a BATM Advanced Communication (Telco Systems T-Metro Switches) private MIB that models Ethernet Linear Protection Switching per ITU-T G.8031, managing 1+1/1:1 working-and-protection path pairs for Carrier Ethernet services. Its central prvtEpsServiceTable, indexed by prvtEpsSvcId, exposes configuration objects such as CFM maintenance-domain level and primary/secondary local and remote MEP IDs (prvtEpsServiceCfmMdLevel, prvtEpsServicePrimaryLocalCfmMep, etc.), revertive/non-revertive behavior and hold-off/wait-to-restore timers (prvtEpsServiceRevertive, prvtEpsServiceHoldOffTimer, prvtEpsServiceWaitToRestoreTimer), and operational state objects like prvtEpsServiceActivePath (working vs. protection), prvtEpsServiceLocalState/RemoteState (using the PrvtEpsProtectionStateType enumeration of APS states such as signalFail, signalDegrade, and forcedSwitch), and prvtEpsServiceDefectsPresent bit flags for provisioning mismatches. Action objects (prvtEpsServiceClear, prvtEpsServiceManualSwitch, prvtEpsServiceForcedSwitch, prvtEpsServiceLockout) let an operator directly command a protection switchover, while a family of NOTIFICATION-TYPEs (prvtEpsSwitchoverAlarm, prvtEpsLostCommunication, prvtEpsSignalFailDetected/Recovery, prvtEpsSignalDegradeDetected/Recovery) report state changes as they occur. It depends on PRVT-SWITCH-MIB for its registration point under the switch subtree and on the ITU-T G.8031 APS concepts rather than any IETF MIB. It is deployed on BATM/Telco Systems T-Metro carrier Ethernet switches, and administrators can download the PRVT-EPS-MIB file to load it into their MIB browser before building dashboards around prvtEpsServiceActivePath and its associated defect/switchover traps.

IPNetwork Monitor allows you to monitor SNMP objects defined in PRVT-EPS-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

BATM Advanced Communication / Telco Systems T-Metro carrier Ethernet switches

Monitoring Examples

An operator polls prvtEpsServiceActivePath and prvtEpsServiceDefectsPresent for a given prvtEpsSvcId to confirm traffic is riding the working path with no provisioning mismatches, and watches for a prvtEpsSwitchoverAlarm notification; a switchover combined with prvtEpsServiceProtectionCounter incrementing repeatedly would indicate a flapping or degraded working path forcing traffic onto protection.

What Can Be Monitored

active path (working vs protection)
protection switchover count
CFM-based signal fail / signal degrade detection
APS defect flags (provisioning/configuration mismatches)
local/remote protection state (per G.8031 APS states)
manual/forced switch and lockout command status

Imported Objects

From PRVT-SWITCH-MIB

switch

OBJECT-IDENTITY

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

RowStatus
TEXTUAL-CONVENTION
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
prvtEpsMIB	1.3.6.1.4.1.738.1.5.132			Private MIB supporting Linear Ethernet Protection Switching (ITU-T G.8031)
prvtEpsMIBNotifications	1.3.6.1.4.1.738.1.5.132.0
NTF prvtEpsDefectAlarm	1.3.6.1.4.1.738.1.5.132.0.1			1. EPS service is either operational or not operational; 2. Failure of protocol defects.
NTF prvtEpsSwitchoverAlarm	1.3.6.1.4.1.738.1.5.132.0.2			The alarm is issued if the active link is changed, pointing to the path where the switchover occured.
NTF prvtEpsLostCommunication	1.3.6.1.4.1.738.1.5.132.0.3			The alarm is issued in case of non reception of APS frames in three consecutive intervals each representing 5 seconds.
NTF prvtEpsRestoredCommunication	1.3.6.1.4.1.738.1.5.132.0.4			APS frames are received normally after APS communication failure.
NTF prvtEpsSignalFailDetected	1.3.6.1.4.1.738.1.5.132.0.5			The alarm is issued in case of CCMs are not received and (3.5 * CCMtime(CCMinterval)) has expired.
NTF prvtEpsSignalDegradeDetected	1.3.6.1.4.1.738.1.5.132.0.6			The alarm is issued in case of monitored error threshold is crossed: 1W Jitter error, 2W Jitter error, Latency error, Frame loss error.
NTF prvtEpsProtctSignalFailDetected	1.3.6.1.4.1.738.1.5.132.0.7			The alarm is issued in case of CCMs are not received on the protected link and (3.5 * CCMtime(CCMinterval)) has expired or the protected link is down.
NTF prvtEpsSignalFailRecovery	1.3.6.1.4.1.738.1.5.132.0.8			The alarm is issued in case of CCMs start to be received correctly again after a prvtEpsSignalFailDetected alarm occured and (3.5 * CCMtime(CCMinterval)) timer no longer expires or the link is up .
NTF prvtEpsSignalDegradeRecovery	1.3.6.1.4.1.738.1.5.132.0.9			The alarm is issued in case of monitored error threshold is crossed bellow limis: 1W Jitter error, 2W Jitter error, Latency error, Frame loss error.
NTF prvtEpsProtctSignalFailRecovery	1.3.6.1.4.1.738.1.5.132.0.10			The alarm is issued in case of CCMs start to be received correctly again on the protected link after a prvtEpsProtctSignalFailDetected alarm occured and (3.5 * CCMtime(CCMinterval)) timer no longer expires or the link is up .
prvtEpsMIBObjects	1.3.6.1.4.1.738.1.5.132.1
prvtEpsService	1.3.6.1.4.1.738.1.5.132.1.1
prvtEpsServiceTable	1.3.6.1.4.1.738.1.5.132.1.1.1		not-accessible	This table contains Ethernet Protection Switching services information.
prvtEpsServiceEntry	1.3.6.1.4.1.738.1.5.132.1.1.1.1		not-accessible	Ethernet Protection Switching information about a specific service.
U32 prvtEpsSvcId	1.3.6.1.4.1.738.1.5.132.1.1.1.1.1	Unsigned32	not-accessible	The service ID.
ROW prvtEpsServiceRowStatus	1.3.6.1.4.1.738.1.5.132.1.1.1.1.2	RowStatus	read-create	The status of the row. The writable columns in a row can not be changed if the row is active. All columns must have a valid value before a row can be activated.
U32 prvtEpsServiceCfmMdLevel	1.3.6.1.4.1.738.1.5.132.1.1.1.1.3	Unsigned32	read-create	Value of the CFM MD level where the protected domain is situated.
U32 prvtEpsServicePrimaryLocalCfmMep	1.3.6.1.4.1.738.1.5.132.1.1.1.1.4	Unsigned32	read-create	Primary local CFM MEP Id.
U32 prvtEpsServicePrimaryRemoteCfmMep	1.3.6.1.4.1.738.1.5.132.1.1.1.1.5	Unsigned32	read-create	Primary remote CFM MEP Id.
U32 prvtEpsServiceSecondaryLocalCfmMep	1.3.6.1.4.1.738.1.5.132.1.1.1.1.6	Unsigned32	read-create	Backup local CFM MEP Id.
U32 prvtEpsServiceSecondaryRemoteCfmMep	1.3.6.1.4.1.738.1.5.132.1.1.1.1.7	Unsigned32	read-create	Backup remote CFM MEP Id.
U32 prvtEpsServiceSignalDegradeCfmTestId	1.3.6.1.4.1.738.1.5.132.1.1.1.1.8	Unsigned32	read-create	The ID of the test used for monitoring (either CFM or SAA test). The value 0 indicates no test.
T/F prvtEpsServiceRevertive	1.3.6.1.4.1.738.1.5.132.1.1.1.1.9	TruthValue	read-create	Protection type (revertive or non-revertive).
U32 prvtEpsServiceHoldOffTimer	1.3.6.1.4.1.738.1.5.132.1.1.1.1.10	Unsigned32	read-create	Value of the Hold Off timer in milliseconds. Valid values are in increments of 100ms.
U32 prvtEpsServiceWaitToRestoreTimer	1.3.6.1.4.1.738.1.5.132.1.1.1.1.11	Unsigned32	read-create	Value of the Wait To Restore timer in seconds (0 to disable it).
T/F prvtEpsServiceAdminFreeze	1.3.6.1.4.1.738.1.5.132.1.1.1.1.12	TruthValue	read-create	Used to freeze the state of the protection service.
INT prvtEpsServiceAdminStatus	1.3.6.1.4.1.738.1.5.132.1.1.1.1.13	INTEGER	read-create	Administrative status of the protection service.
INT prvtEpsServiceActivePath	1.3.6.1.4.1.738.1.5.132.1.1.1.1.14	INTEGER	read-only	Protected service active path.
BIT prvtEpsServiceDefectsPresent	1.3.6.1.4.1.738.1.5.132.1.1.1.1.15	Bits	read-only	Defects registered by the APS protocol could be either none or a composition of bits 0-3: fullyIncompatibleProvisioning(0) - occurs upon reception of three APS frames with the incompatible 'B' bit value within the 22.5 second period; protectionSwitchingIncomplete(1) - occurs if the transmitted 'Requested Signal' and the received 'Bridged Signal' do not match for a period of 50ms or longer; protectionConfigurationMismatch(2) - working/protection configuration mismatch, occurs at the reception of three APS frames from the working transport entity within the 22.5 second period; epsConfigurationMismatch(3) - provisioning mismatch - for example, the local device is set to revertive mode and the remote device is set to non-revertive mode.
PRV prvtEpsServiceLocalState	1.3.6.1.4.1.738.1.5.132.1.1.1.1.19	PrvtEpsProtectionStateType	read-only	Protection state of the local side.
T/F prvtEpsServiceOperationalStatus	1.3.6.1.4.1.738.1.5.132.1.1.1.1.20	TruthValue	read-only	Identifies whether this service is ready for running. The operational status can be up(true) or down(false). When creating the service the operational status will be down. Receiving CCMs from both transport entities and establishment of APS on the protection transport entity will bring the operational status to up.
INT prvtEpsServiceLastEvent	1.3.6.1.4.1.738.1.5.132.1.1.1.1.21	INTEGER	read-only	The most recent event about which the application has sent a notification.
INT prvtEpsServicePrimaryStatus	1.3.6.1.4.1.738.1.5.132.1.1.1.1.22	INTEGER	read-only	Primary path state.
INT prvtEpsServiceSecondaryStatus	1.3.6.1.4.1.738.1.5.132.1.1.1.1.23	INTEGER	read-only	Secondary path state.
PRV prvtEpsServiceRemoteState	1.3.6.1.4.1.738.1.5.132.1.1.1.1.24	PrvtEpsProtectionStateType	read-only	Protection state of the remote side.
INT prvtEpsServiceRemoteApsChannel	1.3.6.1.4.1.738.1.5.132.1.1.1.1.25	INTEGER	read-only	Active APS communication reported by the remote.
INT prvtEpsServiceRemoteProtection	1.3.6.1.4.1.738.1.5.132.1.1.1.1.26	INTEGER	read-only	Type of protection (1+1 or 1:1) reported by the remote device.
INT prvtEpsServiceRemoteDirection	1.3.6.1.4.1.738.1.5.132.1.1.1.1.27	INTEGER	read-only	Type of protection (unidirectional or bidirectional) reported by the remote.
INT prvtEpsServiceRemoteRevertive	1.3.6.1.4.1.738.1.5.132.1.1.1.1.28	INTEGER	read-only	Protection type (revertive or non-revertive) reported by the remote.
INT prvtEpsServiceLocalApsChannel	1.3.6.1.4.1.738.1.5.132.1.1.1.1.29	INTEGER	read-only	Active APS communication reported by the remote.
INT prvtEpsServiceLocalProtection	1.3.6.1.4.1.738.1.5.132.1.1.1.1.30	INTEGER	read-only	Type of protection (1+1 or 1:1) reported by the remote device.
INT prvtEpsServiceLocalDirection	1.3.6.1.4.1.738.1.5.132.1.1.1.1.31	INTEGER	read-only	Type of protection (unidirectional or bidirectional) reported by the remote.
PRV prvtEpsServiceClear	1.3.6.1.4.1.738.1.5.132.1.1.1.1.32	PrvtEpsActionType	read-create	Sends the Clear command to this EPS service.
PRV prvtEpsServiceManualSwitch	1.3.6.1.4.1.738.1.5.132.1.1.1.1.33	PrvtEpsActionType	read-create	Sends the Manual Switch command to this EPS service.
PRV prvtEpsServiceForcedSwitch	1.3.6.1.4.1.738.1.5.132.1.1.1.1.34	PrvtEpsActionType	read-create	Sends the Forced Switch command to this EPS service.
PRV prvtEpsServiceLockout	1.3.6.1.4.1.738.1.5.132.1.1.1.1.35	PrvtEpsActionType	read-create	Sends the LockOut command to this EPS service.
U32 prvtEpsServiceProtectionCounter	1.3.6.1.4.1.738.1.5.132.1.1.1.1.36	Unsigned32	read-only	Counts how many times the service has gone to Protection.

RFC description

Manages Linear Ethernet Protection Switching (ITU-T G.8031) on BATM Telco systems for link redundancy.

Start monitoring BATM Advanced Communication / Telco Systems T-Metro carrier Ethernet switches (G.8031 linear protection) 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 PRVT-EPS-MIB

What Is PRVT-EPS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description