IEEE802171-CFM-MIB

All MIBs › IEEE802171-CFM-MIB

Organization: IEEE 802.1 Working Group

Last Updated: 2006-11-04

Category: Standard: IEEE 802, Technology: OAM

Description: IEEE 802.1 MIB for Connectivity Fault Management based on IEEE 802.17.1 providing OAM objects for an early CFM specification.

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What Is IEEE802171-CFM-MIB?

IEEE802171-CFM-MIB is the standard IEEE 802.1 Working Group MIB implementing IEEE 802.1ag Connectivity Fault Management (CFM). Its stack table, keyed by interface, records direction, MEP (Maintenance Endpoint) ID, and MAC address, a default-MD-level table records VLAN ID, MHF-creation policy, and level per index, a config-error-list table records VLAN ID, ifIndex, and error type, and an MD (Maintenance Domain) table records format, name, level, and MHF-creation policy. As a configuration/protocol-status MIB it lets an administrator confirm CFM maintenance-domain/endpoint configuration and diagnose configuration errors on an 802.1ag-capable device. It is deployed on network devices implementing IEEE 802.1ag Connectivity Fault Management. Engineers implementing or auditing this functionality typically reference the IEEE802171-CFM-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in IEEE802171-CFM-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

Network devices implementing IEEE 802.1ag Connectivity Fault Management

Monitoring Examples

An administrator checks dot1agCfmConfigErrorListErrorType to diagnose a CFM configuration error on an IEEE 802.1ag-capable switch.

What Can Be Monitored

CFM maintenance-domain/endpoint configuration and errors

Imported Objects

From IANA-ADDRESS-FAMILY-NUMBERS-MIB

AddressFamilyNumbers

From IF-MIB

InterfaceIndex

From LLDP-MIB

LldpChassisId
LldpChassisIdSubtype
LldpManAddress
LldpPortId
LldpPortIdSubtype

From Q-BRIDGE-MIB

VlanId
VlanIdOrNone

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32
zeroDotZero

From SNMPv2-TC

MacAddress
RowStatus
TEXTUAL-CONVENTION
TimeInterval
TimeStamp
TruthValue

From TRANSPORT-ADDRESS-MIB

TransportAddress
TransportDomain

How to Use in IPNetwork Monitor

Example using dot1agCfmMepRCcmSequenceErrors OID:

Select a device implementing IEEE802171-CFM-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 dot1agCfmMepRCcmSequenceErrors 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. The total number of out-of-sequence CCMs received from all remote MEPs. 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
dot1agCfmCompliance	1.0.8802.1.1.3.2.1.1			The compliance statement for support of the CFM MIB module.
dot1agCfmCompliances	1.0.8802.1.1.3.2.1
dot1agCfmConfigErrorList	1.0.8802.1.1.3.1.3
dot1agCfmConfigErrorListEntry	1.0.8802.1.1.3.1.3.1.1		not-accessible	The Config Error List Table entry
DOT dot1agCfmConfigErrorListErrorType	1.0.8802.1.1.3.1.3.1.1.3	Dot1agCfmConfigErrors	read-only	A vector of Boolean error conditions from 22.2.4, any of which may be true: 1) CFMleak; 2) ConflictingVids; 3) ExcessiveLevels; 4) OverlappedLevels.
dot1agCfmConfigErrorListGroup	1.0.8802.1.1.3.2.2.3			Objects for the Cfm Configuration Error List Group.
NUM dot1agCfmConfigErrorListIfIndex	1.0.8802.1.1.3.1.3.1.1.2	InterfaceIndex	not-accessible	This object is the IfIndex of the interface.
dot1agCfmConfigErrorListTable	1.0.8802.1.1.3.1.3.1		not-accessible	The CFM Configuration Error List table provides a list of Interfaces and VIDs that are incorrectly configured.
VLA dot1agCfmConfigErrorListVid	1.0.8802.1.1.3.1.3.1.1.1	VlanId	not-accessible	The vlan ID of the vlan with errored interfaces.
dot1agCfmConformance	1.0.8802.1.1.3.2
dot1agCfmDefaultMdLevel	1.0.8802.1.1.3.1.2
dot1agCfmDefaultMdLevelEntry	1.0.8802.1.1.3.1.2.1.1		not-accessible	The Default MD Level table entry.
dot1agCfmDefaultMdLevelGroup	1.0.8802.1.1.3.2.2.2			Objects for the Default MD Level group.
U32 dot1agCfmDefaultMdLevelIndex	1.0.8802.1.1.3.1.2.1.1.1	Unsigned32	not-accessible	The index to the default MD Level table
NUM dot1agCfmDefaultMdLevelLevel	1.0.8802.1.1.3.1.2.1.1.4	Dot1agCfmMaintenanceDomainLevel	read-write	The MD Level at which MHFs are to be created, or -1 if defMHFnone.
DOT dot1agCfmDefaultMdLevelMhfCreation	1.0.8802.1.1.3.1.2.1.1.3	Dot1agCfmMhfCreation	read-write	A value indicating if the Management entity can create MHFs (MIP Half Function) for this VID.
dot1agCfmDefaultMdLevelTable	1.0.8802.1.1.3.1.2.1		not-accessible	The Default MD Level Managed Object controls MHF creation for VIDs that are not attached to a specific Maintenance Association Managed Object. The writable objects in this table need to be persistent upon reboot or restart of a device.
VLA dot1agCfmDefaultMdLevelVid	1.0.8802.1.1.3.1.2.1.1.2	VlanIdOrNone	read-only	This is a VLAN ID monitored by MA.
NTF dot1agCfmFaultAlarm	1.0.8802.1.1.3.0.1			A MEP has a persistent defect condition. A notification (fault alarm) is sent to the management entity with the OID of the MEP that has detected the fault. Whenever a MEP has a persistent defect, it may or may not generate a Fault Alarm to warn the system administrator of the problem, as controlled by the MEP Fault Notification Generator State Machine and associated Managed Objects. Only the highest-priority defect, as shown in Table 20-1, is reported in the Fault Alarm. The management entity receiving the notification can identify the system from the network source address of the notification, and can identify the MEP reporting the defect by the indices in the OID of the dot1agCfmMepHighestPrDefect variable in the notification.
dot1agCfmGroups	1.0.8802.1.1.3.2.2
LLD dot1agCfmLtrChassisId	1.0.8802.1.1.3.1.6.2.1.10	LldpChassisId	read-only	The Chassis ID returned in the Sender ID TLV of the LTR, if any. The format of this object is determined by the value of the dot1agCfmLtrChassisIdSubtype object.
LLD dot1agCfmLtrChassisIdSubtype	1.0.8802.1.1.3.1.6.2.1.9	LldpChassisIdSubtype	read-only	This object specifies the format of the Chassis ID returned in the Sender ID TLV of the LTR, if any. This value is meaningless if the dot1agCfmLtrChassisId has a length of 0.
DOT dot1agCfmLtrEgress	1.0.8802.1.1.3.1.6.2.1.17	Dot1agCfmEgressActionFieldValue	read-only	The value returned in the Egress Action Field of the LTM.
MAC dot1agCfmLtrEgressMac	1.0.8802.1.1.3.1.6.2.1.18	MacAddress	read-only	MAC address returned in the egress MAC address field.
LLD dot1agCfmLtrEgressPortId	1.0.8802.1.1.3.1.6.2.1.20	LldpPortId	read-only	Egress Port ID. The format of this object is determined by the value of the dot1agCfmLtrEgressPortIdSubtype object.
LLD dot1agCfmLtrEgressPortIdSubtype	1.0.8802.1.1.3.1.6.2.1.19	LldpPortIdSubtype	read-only	Format of the egress Port ID.
dot1agCfmLtrEntry	1.0.8802.1.1.3.1.6.2.1		not-accessible	The LinktraceReply table entry.
T/F dot1agCfmLtrForwarded	1.0.8802.1.1.3.1.6.2.1.4	TruthValue	read-only	Indicates if a LTM was forwarded by the repsonding MP, as returned ind the 'FwdYes' flag of the flags field.
DOT dot1agCfmLtrIngress	1.0.8802.1.1.3.1.6.2.1.13	Dot1agCfmIngressActionFieldValue	read-only	The value returned in the Ingress Action Field of the LTM.
MAC dot1agCfmLtrIngressMac	1.0.8802.1.1.3.1.6.2.1.14	MacAddress	read-only	MAC address returned in the ingress MAC address field.
LLD dot1agCfmLtrIngressPortId	1.0.8802.1.1.3.1.6.2.1.16	LldpPortId	read-only	Ingress Port ID. The format of this object is determined by the value of the dot1agCfmLtrIngressPortIdSubtype object.
LLD dot1agCfmLtrIngressPortIdSubtype	1.0.8802.1.1.3.1.6.2.1.15	LldpPortIdSubtype	read-only	Format of the Ingress Port ID.
OCT dot1agCfmLtrLastEgressIdentifier	1.0.8802.1.1.3.1.6.2.1.6	OCTET STRING	read-only	An octet field holding the Last Egress Identifier returned in the LTR. The Last Egress Identifier identifies the MEP Linktrace Initiator that originated, or the Linktrace Responder that forwarded, the LTM to which this LTR is the response. This is the same value as the Egress Identifier field of that LTM.
ADR dot1agCfmLtrManAddress	1.0.8802.1.1.3.1.6.2.1.12	LldpManAddress	read-only	Management Address information of the bridge transmitting the LTR, if returned in the Sender ID TLV. Some limitation to the size of the TLVs carrying a Manaement Address is needed, as there is no bound on the lengths of AddressFamilyNumbers. 31 octets, the maximum length of LldpManAddress, is long enough for currently deployed systems. This MIB module assumes that SNMP (IETF STD 62) is used along with the Management Address to access the management database.
ADR dot1agCfmLtrManAddressType	1.0.8802.1.1.3.1.6.2.1.11	AddressFamilyNumbers	read-only	Management Address subtype of the bridge transmitting the LTR, if returned in a Sender ID TLV. The value is meaningless if the dot1agCfmLtrManAddress has a length of 0.
OCT dot1agCfmLtrNextEgressIdentifier	1.0.8802.1.1.3.1.6.2.1.7	OCTET STRING	read-only	An octet field holding the Next Egress Identifier returned in the LTR. The Next Egress Identifier Identifies the Linktrace Responder that transmitted this LTR, and can forward the LTM to the next hop. This is the same value as the Egress Identifier of the forwarded LTM, if any. If the FwdYes bit of the Flags field is false, the contents of this field are undefined, i.e. any value can be transmitted, and the field is ignored by the receiver.
OCT dot1agCfmLtrOrganizationSpecificTlv	1.0.8802.1.1.3.1.6.2.1.21	OCTET STRING	read-only	All Organization specific TLVs returned in the LTR, if any. Includes all octets including and following the TLV Length field of each TLV, concatenated together.
U32 dot1agCfmLtrReceiveOrder	1.0.8802.1.1.3.1.6.2.1.2	Unsigned32	not-accessible	An index to distinguish among multiple LTRs with the same LTR Transaction Identifier field value. dot1agCfmLtrReceiveOrder are assigned sequentially from 1, in the order that the Linktrace Initiator received the LTRs.
DOT dot1agCfmLtrRelay	1.0.8802.1.1.3.1.6.2.1.8	Dot1agCfmRelayActionFieldValue	read-only	Value returned in the Relay Action field.
U32 dot1agCfmLtrSeqNumber	1.0.8802.1.1.3.1.6.2.1.1	Unsigned32	not-accessible	Transaction identifier/Sequence number returned by a previous transmit linktrace message command, indicating which LTM's response is going to be returned.
dot1agCfmLtrTable	1.0.8802.1.1.3.1.6.2		not-accessible	This table extends the MEP table and contains a list of Linktrace replies received by a specific MEP in response to a linktrace message. SNMP SMI does not allow to state in a MIB that an object in a table is an array. The solution is to take the index (or indices) of the first table and add one or more indices.
T/F dot1agCfmLtrTerminalMep	1.0.8802.1.1.3.1.6.2.1.5	TruthValue	read-only	A boolean value stating whether the forwarded LTM reached a MEP enclosing its MA, as returned in the Terminal MEP flag of the Flags field.
U32 dot1agCfmLtrTtl	1.0.8802.1.1.3.1.6.2.1.3	Unsigned32	read-only	TTL field value for a returned LTR.
dot1agCfmMa	1.0.8802.1.1.3.1.5
NUM dot1agCfmMaCcmInterval	1.0.8802.1.1.3.1.5.3.1.5	Dot1agCfmCcmInterval	read-create	Interval between CCM transmissions to be used by all MEPs in the MA.
dot1agCfmMaEntry	1.0.8802.1.1.3.1.5.3.1		not-accessible	The MA table entry.
ADR dot1agCfmMaFaulAlarmDestAddress	1.0.8802.1.1.3.1.5.3.1.7	TransportAddress	read-create	The transportAddress to which Fault Alarms are to be transmitted to. The type/format of this object is determined by the value of the dot1agCfmMaFaultAlarmDestDomain. If the dot1agCfmMaFaultAlarmDestDomain object has a value of 'zeroDotZero' (indicating 'Fault Alarms are not to be transmitted') then this object should have a value of a zero-length OCTET STRING.
TRA dot1agCfmMaFaultAlarmDestDomain	1.0.8802.1.1.3.1.5.3.1.6	TransportDomain	read-create	The transportDomain for the address to which Fault Alarms are to be transmitted. Typical values will be one of (not all inclusive) list: transportDomainUdpIpv4 (from TRANSPORT-ADDRESS-MIB) transportDomainUdpIpv6 (from TRANSPORT-ADDRESS-MIB) snmpIeee802Domain (from SNMP-IEEE802-TM-MIB) The value 'zeroDotZero' indicates 'Fault Alarms are not to be transmitted', in which case the related object of SYNTAX transportAddress must have a zero-length OCTET STRING as a value.
NUM dot1agCfmMaFormat	1.0.8802.1.1.3.1.5.3.1.2	Dot1agCfmMaintAssocNameType	read-create	The type (and thereby format) of the Maintenance Association Name.
dot1agCfmMaGroup	1.0.8802.1.1.3.2.2.5			Objects for the MA group.
U32 dot1agCfmMaIndex	1.0.8802.1.1.3.1.5.3.1.1	Unsigned32	not-accessible	Index of the MA table dot1agCfmMaTableNextIndex needs to be inspected to find an available index for row-creation 1..4094 -> describes an MA entry associated with a VID 16777217..4294967295 -> describes an MA entry not associated with any VID
dot1agCfmMaMepListEntry	1.0.8802.1.1.3.1.5.8.1		not-accessible	The known MEPS table entry.
DOT dot1agCfmMaMepListIdentifier	1.0.8802.1.1.3.1.5.8.1.1	Dot1agCfmMepId	not-accessible	MEPID
ROW dot1agCfmMaMepListRowStatus	1.0.8802.1.1.3.1.5.8.1.2	RowStatus	read-create	The status of the row. Read SNMPv2-TC (RFC1903) for an explanation of the possible values this object can take.
dot1agCfmMaMepListTable	1.0.8802.1.1.3.1.5.8		not-accessible	List of MEPIDs (in any bridge) that belong to the same MA. Clause 12.14.6.1.3 specifies that a list of MEPIDs in all bridges in that MA, but since SNMP SMI does not allow to state in a MIB that an object in a table is an array, the information has to be stored in another table with two indices, being the first index, the index of the table that contains the list or array.
DOT dot1agCfmMaMhfCreation	1.0.8802.1.1.3.1.5.3.1.4	Dot1agCfmMhfCreation	read-create	Indicates if the Management entity can create MHFs (MIP Half Function) for this MA.
T/F dot1agCfmMaMoreThanOneVid	1.0.8802.1.1.3.1.5.3.1.8	TruthValue	read-create	True indicate that the MA is associated with more that one VID. False indicates that the MA is associated with only one VID or no VID. This value should be false for MAs with an index greater than 16777216.
NUM dot1agCfmMaName	1.0.8802.1.1.3.1.5.3.1.3	Dot1agCfmMaintAssocName	read-create	The Short Maintenance Association name. The type/format of this object is determined by the value of the dot1agCfmMaNameType object.
ROW dot1agCfmMaRowStatus	1.0.8802.1.1.3.1.5.3.1.9	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.
dot1agCfmMaTable	1.0.8802.1.1.3.1.5.3		not-accessible	The Maintenance Association table. Each row in the table represents an MA. An MA is a set of MEPs, each configured with a single service instance. Creation of a Service Instance establishes a connectionless association among the selected DSAPs. Configuring a Maintenance association End Point (MEP) at each of the DSAPs creates a Maintenance Association (MA) to monitor that connectionless connectivity. The MA is identified by a Short MA Name that is unique within the Maintenance Domain and chosen to facilitate easy identification of the Service Instance. Together, the Maintenance Domain Name and the Short MA Name form the Maintenance Association Identifier (MAID) that is carried in CFM Messages to identify incorrect connectivity among Service Instances. A small integer, the Maintenance association End Point Identifier (MEPID), identifies each MEP among those configured on a single MA (802.1ag clauses 3.17 and 18.2). This table uses two indices, first index is the index of the Maintenance Domain table. The writable objects in this table need to be persistent upon reboot or restart of a device.
NUM dot1agCfmMaTableNextIndex	1.0.8802.1.1.3.1.5.1	Dot1afCfmIndexIntegerNextFree	read-only	Value to be used as the index of the MA table when the management entity wants to create a new row in the table.
dot1agCfmMaVlanEntry	1.0.8802.1.1.3.1.5.4.1		not-accessible	The Maintenance Association VLAN table entry.
ROW dot1agCfmMaVlanRowStatus	1.0.8802.1.1.3.1.5.4.1.2	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.
dot1agCfmMaVlanTable	1.0.8802.1.1.3.1.5.4		not-accessible	If an MA is associated with multiple VIDs, then this table contains all the VIDs associated with the MA other than the primary VID. The writable objects in this table need to be persistent upon reboot or restart of a device.
VLA dot1agCfmMaVlanVid	1.0.8802.1.1.3.1.5.4.1.1	VlanId	not-accessible	This is a VLAN ID of the vlan monitored by the MA. VID 0 means that the MA is not associated with any VLAN.
dot1agCfmMd	1.0.8802.1.1.3.1.4
dot1agCfmMdEntry	1.0.8802.1.1.3.1.4.2.1		not-accessible	The Maintenance Domain table entry. This entry is not lost upon reboot. It is backed up by stable storage.
ADR dot1agCfmMdFaulAlarmDestAddress	1.0.8802.1.1.3.1.4.2.1.7	TransportAddress	read-create	The transportAddress to which Fault Alarms are to be transmitted to. The type/format of this object is determined by the value of the dot1agCfmMdFaultAlarmDestDomain. If the dot1agCfmMdFaultAlarmDestDomain object has a value of 'zeroDotZero' (indicating 'Fault Alarms are not to be transmitted') then this object should have a value of a zero-length OCTET STRING.
TRA dot1agCfmMdFaultAlarmDestDomain	1.0.8802.1.1.3.1.4.2.1.6	TransportDomain	read-create	The transportDomain for the address to which Fault Alarms are to be transmitted. Typical values will be one of (not all inclusive) list: transportDomainUdpIpv4 (from TRANSPORT-ADDRESS-MIB) transportDomainUdpIpv6 (from TRANSPORT-ADDRESS-MIB) snmpIeee802Domain (from SNMP-IEEE802-TM-MIB) The value 'zeroDotZero' indicates 'Fault Alarms are not to be transmitted', in which case the related object of SYNTAX TransportAddress must have a zero-length OCTET STRING as a value.
NUM dot1agCfmMdFormat	1.0.8802.1.1.3.1.4.2.1.2	Dot1agCfmMaintDomainNameType	read-create	The type (and thereby format) of the Maintenance Domain Name.
dot1agCfmMdGroup	1.0.8802.1.1.3.2.2.4			Objects for the Maintenance Domain Group.
U32 dot1agCfmMdIndex	1.0.8802.1.1.3.1.4.2.1.1	Unsigned32	not-accessible	The index to the maintenance domain table. dot1agCfmMdTableNextIndex needs to be inspected to find an available index for row-creation. Referential integrity is required i.e. the index needs to be persistent upon a reboot or restart of a device. The index can never be reused for other maintenance domain. The index value should keep increasing up to the time that they wrap around. This is to facilitate access control based on OID.
NUM dot1agCfmMdLevel	1.0.8802.1.1.3.1.4.2.1.4	Dot1agCfmMaintenanceDomainLevel	read-create	The Maintenance Domain Level.
DOT dot1agCfmMdMhfCreation	1.0.8802.1.1.3.1.4.2.1.5	Dot1agCfmMhfCreation	read-create	Enumerated value indicating whether the management entity can create MHFs (MIP Half Function) for this Maintenance Domain.
NUM dot1agCfmMdName	1.0.8802.1.1.3.1.4.2.1.3	Dot1agCfmMaintDomainName	read-create	The Maintenance Domain name. The type/format of this object is determined by the value of the dot1agCfmMdNameType object. Each Maintenance Domain has unique name amongst all those used or available to a service provider or operator. It facilitates easy identification of administrative responsibility for each Maintenance Domain. Clause 3.24 defines a Maintenance Domain name as the identifier, unique over the domain for which CFM is to protect against accidental concatenation of Service Instances, of a particular Maintenance Domain.
ROW dot1agCfmMdRowStatus	1.0.8802.1.1.3.1.4.2.1.8	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.
dot1agCfmMdTable	1.0.8802.1.1.3.1.4.2		not-accessible	The MaintenanceDomain table. Each row in the table represents a different maintenance domain. A Maintenace domain is described in 802.1ag (3.22) as the network or the part of the network for which faults in connectivity are to be managed. The boundary of a Maintenance Domain is defined by a set of DSAPs, each of which can become a point of connectivity to a service instance.
NUM dot1agCfmMdTableNextIndex	1.0.8802.1.1.3.1.4.1	Dot1afCfmIndexIntegerNextFree	read-only	This object contains an unused value for dot1agCfmMdIndex in the dot1agCfmMdTable, or a zero to indicate that none exist.
dot1agCfmMep	1.0.8802.1.1.3.1.6
T/F dot1agCfmMepActive	1.0.8802.1.1.3.1.6.1.1.5	TruthValue	read-create	Administrative state of the MEP A Boolean indicating the administrative state of the MEP. True indicates that the MEP is to function normally, and false that it is to cease functioning.
T/F dot1agCfmMepCciEnabled	1.0.8802.1.1.3.1.6.1.1.7	TruthValue	read-create	If set to true, the MEP will generate CCM messages.
C32 dot1agCfmMepCciSentCcms	1.0.8802.1.1.3.1.6.1.1.24	Counter32	read-only	Total number of Continuity Check messages transmitted.
U32 dot1agCfmMepCcmLtmPriority	1.0.8802.1.1.3.1.6.1.1.8	Unsigned32	read-create	The priority value for CCMs and LTMs transmitted by the MEP. Default Value in the highest priority value allowed to pass through the bridge port for any of this MEPs VIDs. The management entity can obtain the default valuefor this variable from the priority regeneration table by extracting the highest priority value in this table on this MEPs bridge port. (1 is lowest, then 2, then 0, then 3-7).
LLD dot1agCfmMepDbChassisId	1.0.8802.1.1.3.1.6.3.1.9	LldpChassisId	read-only	The Chassis ID. The format of this object is determined by the value of the dot1agCfmLtrChassisIdSubtype object.
LLD dot1agCfmMepDbChassisIdSubtype	1.0.8802.1.1.3.1.6.3.1.8	LldpChassisIdSubtype	read-only	This object specifies the format of the Chassis ID received in the last CCM.
dot1agCfmMepDbEntry	1.0.8802.1.1.3.1.6.3.1		not-accessible	The MEP Database table entry.
dot1agCfmMepDbGroup	1.0.8802.1.1.3.2.2.7			Objects for the MEP group.
NUM dot1agCfmMepDbInterfaceStatusTlv	1.0.8802.1.1.3.1.6.3.1.7	Dot1agCfmInterfaceStatus	read-only	An enumerated value of the Interface status TLV received in the last CCM from the remote MEP or the default value isNoInterfaceStatus TLV indicating either no CCM has been received, or that no interface status TLV was received in the last CCM.
MAC dot1agCfmMepDbMacAddress	1.0.8802.1.1.3.1.6.3.1.4	MacAddress	read-only	The MAC address of the remote MEP.
ADR dot1agCfmMepDbManAddress	1.0.8802.1.1.3.1.6.3.1.11	LldpManAddress	read-only	Management Address information of the bridge transmitting the CCM. Some limitation to the size of the TLVs carrying a Manaement Address is needed, as there is no bound on the lengths of AddressFamilyNumbers. 31 octets, the maximum length of LldpManAddress, is long enough for currently deployed systems. This MIB module assumes that SNMP (IETF STD 62) is used along with the Management Address to access the management database.
ADR dot1agCfmMepDbManAddressType	1.0.8802.1.1.3.1.6.3.1.10	AddressFamilyNumbers	read-only	Management Address subtype of the bridge transmitting the CCM.
DOT dot1agCfmMepDbPortStatusTlv	1.0.8802.1.1.3.1.6.3.1.6	Dot1agCfmPortStatus	read-only	An enumerated value of the Port status TLV received in the last CCM from the remote MEP or the default value psNoPortStateTLV indicating either no CCM has been received, or that nor port status TLV was received in the last CCM.
T/F dot1agCfmMepDbRdi	1.0.8802.1.1.3.1.6.3.1.5	TruthValue	read-only	State of the RDI bit in the last received CCM (true for RDI=1), or false if none has been received.
TIM dot1agCfmMepDbRMepFailedOkTime	1.0.8802.1.1.3.1.6.3.1.3	TimeStamp	read-only	The time (SysUpTime) at which the IFF Remote MEP state machine last entered either the RMEP_FAILED or RMEP_OK state.
DOT dot1agCfmMepDbRMepIdentifier	1.0.8802.1.1.3.1.6.3.1.1	Dot1agCfmMepId	not-accessible	Maintenance association End Point Identifier of a remote MEP whose information from the MEP Database is to be returned.
DOT dot1agCfmMepDbRMepState	1.0.8802.1.1.3.1.6.3.1.2	Dot1agCfmRemoteMepState	read-only	The operational state of the remote MEP IFF State machines.
dot1agCfmMepDbTable	1.0.8802.1.1.3.1.6.3		not-accessible	The MEP Database. A database, maintained by every MEP, that maintains received information about other MEPs in the Maintenance Domain. SNMP SMI does not allow to stat in a MIB that an object in a table is an array. The solution is to take the index (or indices) of the first table and add one or more indices.
DOT dot1agCfmMepDirection	1.0.8802.1.1.3.1.6.1.1.3	Dot1agCfmMpDirection	read-create	The direction in which the MEP faces on the Bridge port.
dot1agCfmMepEntry	1.0.8802.1.1.3.1.6.1.1		not-accessible	The MEP table entry
T/F dot1agCfmMepErrMacStatus	1.0.8802.1.1.3.1.6.1.1.17	TruthValue	read-only	A Boolean flag (someMACstatusDefect, 20.33.6) indicating that a Port Status TLV (21.5.4) or Interface Status TLV (21.5.5) is indicating an error condition (can trigger DefMACstatus).
T/F dot1agCfmMepErrorCcmDefect	1.0.8802.1.1.3.1.6.1.1.19	TruthValue	read-only	A Boolean flag indicating that a stream of erroneous CCMs is being received from some MEP in this MEP's MA.
OCT dot1agCfmMepErrorCcmLastFailure	1.0.8802.1.1.3.1.6.1.1.21	OCTET STRING	read-only	The last-received CCM that triggered an DefErrorCCM fault.
ADR dot1agCfmMepFaulAlarmDestAddress	1.0.8802.1.1.3.1.6.1.1.11	TransportAddress	read-create	The transportAddress to which Fault Alarms (12.14.7.7) are to be transmitted to. The type/format of this object is determined by the value of dot1agCfmMepFaultAlarmDestDomain. If the dot1agCfmMepFaultAlarmDestDomain object has a value of 'zeroDotZero' (indicating 'Fault Alarms are not specified') then this object should have a value of a zero-length OCTET STRING. If 'Fault Alarms are not specified', the address used is that from the Maintenance Association managed object (12.14.6.1.3:e).
TRA dot1agCfmMepFaultAlarmDestDomain	1.0.8802.1.1.3.1.6.1.1.10	TransportDomain	read-create	The transportDomain for the address to which Fault Alarms are to be transmitted. Typical values will be one of (not all inclusive) list: transportDomainUdpIpv4 (from TRANSPORT-ADDRESS-MIB) transportDomainUdpIpv6 (from TRANSPORT-ADDRESS-MIB) snmpIeee802Domain (from SNMP-IEEE802-TM-MIB) The value 'zeroDotZero' indicates 'Fault Alarms are not to be transmitted', in which case the related object of SYNTAX transportAddress must have a zero-length OCTET STRING as a value.
NUM dot1agCfmMepFngAlarmTime	1.0.8802.1.1.3.1.6.1.1.13	TimeInterval	read-create	The time that defects must be present before a Fault Alarm is issued (fngAlarmTime. 20.33.3) (default 2.5s).
NUM dot1agCfmMepFngResetTime	1.0.8802.1.1.3.1.6.1.1.14	TimeInterval	read-create	The time that defects must be absent before re-enabling a Fault Alarm (fngResetTime, 20.33.4) (default 10s).
DOT dot1agCfmMepFngState	1.0.8802.1.1.3.1.6.1.1.6	Dot1agCfmFngState	read-only	Current state of the MEP Fault Notification Generator State Machine.
dot1agCfmMepGroup	1.0.8802.1.1.3.2.2.6			Objects for the MEP group.
DOT dot1agCfmMepHighestPrDefect	1.0.8802.1.1.3.1.6.1.1.15	Dot1agCfmHighestDefectPri	read-only	The highest priority defect that has been present since the MEPs Fault Notification Generator State Machine was last in the FNG_RESET state.
DOT dot1agCfmMepIdentifier	1.0.8802.1.1.3.1.6.1.1.1	Dot1agCfmMepId	not-accessible	Integer that is unique among all the MEPs in the same MA. Other definition is: a small integer, unique over a given Maintenance Association, identifying a specific Maintenance association End Point (3.19). MEP Identifier is also known as the MEPID.
NUM dot1agCfmMepIfIndex	1.0.8802.1.1.3.1.6.1.1.2	InterfaceIndex	read-create	This object is the interface index of the interface eiter a bridge port, or an aggregated IEEE 802.1 link within a bridge port, to which the MEP is attached.
C32 dot1agCfmMepLbrBadMsdu	1.0.8802.1.1.3.1.6.1.1.28	Counter32	read-only	(optional) The total number of LBRs received whose mac_service_data_unit did not match (except for the OpCode) that of the corresponding LBM (20.2.3).
C32 dot1agCfmMepLbrIn	1.0.8802.1.1.3.1.6.1.1.26	Counter32	read-only	Total number of valid, in-order Loopback Replies received.
C32 dot1agCfmMepLbrInOutOfOrder	1.0.8802.1.1.3.1.6.1.1.27	Counter32	read-only	The total number of valid, out-of-order Loopback Replies received.
C32 dot1agCfmMepLbrOut	1.0.8802.1.1.3.1.6.1.1.31	Counter32	read-only	Total number of Loopback Replies transmitted.
DOT dot1agCfmMepLowPrDef	1.0.8802.1.1.3.1.6.1.1.12	Dot1agCfmLowestAlarmPri	read-create	An integer value specifying the lowest priority defect that is allowed to generate fault alarm.
U32 dot1agCfmMepLtmNextSeqNumber	1.0.8802.1.1.3.1.6.1.1.29	Unsigned32	read-only	Next transaction identifier/sequence number to be sent in a Linktrace message. This sequence number can be zero because it wraps around.
MAC dot1agCfmMepMacAddress	1.0.8802.1.1.3.1.6.1.1.9	MacAddress	read-only	MAC address of the MEP.
U32 dot1agCfmMepNextLbmTransId	1.0.8802.1.1.3.1.6.1.1.25	Unsigned32	read-only	Next sequence number/transaction identifier to be sent in a Loopback message. This sequence number can be zero because it wraps around.
U32 dot1agCfmMepPrimaryVid	1.0.8802.1.1.3.1.6.1.1.4	Unsigned32	read-create	An integer indicating the Primary VID of the MEP, always one of the VIDs assigned to the MEP's MA. The value 0 indicates that either the Primary VID is that of the MEP's MA, or that the MEP's MA is associated with no VID.
C32 dot1agCfmMepRCcmSequenceErrorsEx	1.0.8802.1.1.3.1.6.1.1.23	Counter32	read-only	The total number of out-of-sequence CCMs received from all remote MEPs.
ROW dot1agCfmMepRowStatus	1.0.8802.1.1.3.1.6.1.1.51	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.
T/F dot1agCfmMepSomeRdiDefect	1.0.8802.1.1.3.1.6.1.1.16	TruthValue	read-only	A Boolean flag indicating that some other MEP in this MEP's MA is transmitting the RDI bit.
T/F dot1agCfmMepSomeRMepCcmDefect	1.0.8802.1.1.3.1.6.1.1.18	TruthValue	read-only	A Boolean flag indicating that CCMs are not being received from at least one of the configured remote MEPs.
dot1agCfmMepTable	1.0.8802.1.1.3.1.6.1		not-accessible	The Maintenance Association End Point (MEP) table. Each row in the table represents a different MEP. A MEP is an actively managed CFM entity, associated with a specific DSAP of a Service Instance, which can generate and receive CFM PDUs and track any responses. It is an end point of a single Maintenance Association, and is an endpoint of a separate Maintenance Entity for each of the other MEPs in the same Maintenance Association (802.1ag clause 3.18). This table uses three indices. The first two indices are the indices of the Maintenance Domain and MA tables, the reason being that a MEP is always related to an MA and Maintenance Domain. The Transmit Loopback table. Entries in this table are created/removed at the same time than entries in the MEP table are created/removed. The MEP table also stores all the managed objects for sending LBM and LTM. LBM Managed objects LBM Managed objects in the MEP table enables the management entity to initiate transmission of Loopback messages. It will signal the MEP that it should transmit some number of Loopback messages and detect the detection (or lack thereof) of the corresponding Loopback messages. Steps to use entries in this table: 1) Wait for dot1agCfmMepTransmitLbmStatus value to be 'ready'. To do this do this sequence: a. an SNMP GET for both SnmpSetSerialNo and dot1agCfmMepTransmitLbmStatus objects (in same SNMP PDU). b. Check if value for dot1agCfmMepTransmitLbmStatus is 'ready' - if not, wait x seconds, goto step a above. - if yes, save the value of SnmpSetSerialNo and go to step 2) below 2) Change dot1agCfmMepTransmitLbmStatus value from 'ready' to 'notReady' to ensure no other management entity will use the service. In order to not disturb a possible other NMS do this by sending an SNMP SET for both SnmpSetSerialNo and dot1agCfmMepTransmitLbmStatus objects (in same SNMP PDU, and make sure SNmpSetSerialNo is the first varBind). For the SnmpSetSerialNo varBind, use the value that you obtained in step 1)a.. This ensures that two cooperating NMSes will not step on each others toes. 3) Setup the different data to be sent (number of messages, optional TLVs,...). 4) Record the current values of dot1agCfmMepLbrIn, dot1agCfmMepLbrInOutOfOrder, and dot1agCfmMepLbrBadMsdu. 6) Change dot1agCfmMepTransmitLbmStatus value from 'notReady' to 'transmit' to initiate transmission of Loopback messages. 7) Check the value of dot1agCfmMepTransmitLbmResultOK to find out if the operation was sucessfully initiated or not. 8) Monitor the value of dot1agCfmMepTransmitLbmMessages. When it reaches 0, the last LBM has been transmitted. Wait an additional 5 seconds to ensure that all LBRs have been returned. 9) Compare dot1agCfmMepLbrIn, dot1agCfmMepLbrInOutOfOrder, and dot1agCfmMepLbrBadMsdu to their old values from step 4, above, to get the results of the test. 10) Change the dot1agCfmMepTransmitLbmStatus value back to 'ready' to allow other management entities to use the table. LTM Managed objects The LTM Managed objects in the MEP table are used in a manner similar to that described for LBM transmission, above. Upon successfully initiating the transmission, the variables dot1agCfmMepTransmitLtmSeqNumber and dot1agCfmMepTransmitLtmEgressIdentifier return the information required to recover the results of the LTM from the dot1agCfmLtrTable.
OCT dot1agCfmMepTransmitLbmDataTlv	1.0.8802.1.1.3.1.6.1.1.37	OCTET STRING	read-create	An arbitrary amount of data to be included in the Data TLV, if the Data TLV is selected to be sent.
T/F dot1agCfmMepTransmitLbmDestIsMepId	1.0.8802.1.1.3.1.6.1.1.35	TruthValue	read-create	True indicates that MepID of the target MEP is used for Loopback transmission. False indicates that unicast destination MAC address of the target MEP is used for Loopback transmission.
MAC dot1agCfmMepTransmitLbmDestMacAddress	1.0.8802.1.1.3.1.6.1.1.33	MacAddress	read-create	The Target MAC Address Field to be transmitted: A unicast destination MAC address. This address will be used if the value of the column dot1agCfmMepTransmitLbmDestIsMepId is 'false'.
DOT dot1agCfmMepTransmitLbmDestMepId	1.0.8802.1.1.3.1.6.1.1.34	Dot1agCfmMepIdOrZero	read-create	The Maintenance association End Point Identifier of another MEP in the same Maintenance Association to which the LBM is to be sent. This address will be used if the value of the column dot1agCfmMepTransmitLbmDestIsMepId is 'true'.
I32 dot1agCfmMepTransmitLbmMessages	1.0.8802.1.1.3.1.6.1.1.36	Integer32	read-create	The number of Loopback messages to be transmitted.
T/F dot1agCfmMepTransmitLbmResultOK	1.0.8802.1.1.3.1.6.1.1.40	TruthValue	read-only	Indicates the result of the operation: - true The Loopback Message(s) will be (or hasbeen) sent. - false The Loopback Message(s) will not be sent.
U32 dot1agCfmMepTransmitLbmSeqNumber	1.0.8802.1.1.3.1.6.1.1.41	Unsigned32	read-only	The Loopback Transaction Identifier (dot1agCfmMepNextLbmTransId) of the first LBM (to be) sent. The value returned is undefined if dot1agCfmMepTransmitLbmResultOK is false.
T/F dot1agCfmMepTransmitLbmStatus	1.0.8802.1.1.3.1.6.1.1.32	TruthValue	read-write	A Boolean flag set to true by the bridge port to indicate that another LBM may be transmitted. Reset to false by the MEP Loopback Initiator State Machine.
T/F dot1agCfmMepTransmitLbmVlanDropEnable	1.0.8802.1.1.3.1.6.1.1.39	TruthValue	read-create	Drop Enable bit value to be used in the VLAN tag, if present in the transmitted frame. For more information about VLAN Drop Enable, please check IEEE 802.1ad.
I32 dot1agCfmMepTransmitLbmVlanPriority	1.0.8802.1.1.3.1.6.1.1.38	Integer32	read-create	Priority. 3 bit value to be used in the VLAN tag, if present in the transmitted frame. The default value is CCM priority.
OCT dot1agCfmMepTransmitLtmEgressIdentifier	1.0.8802.1.1.3.1.6.1.1.50	OCTET STRING	read-create	Identifies the MEP Linktrace Initiator that is originating, or the Linktrace Responder that is forwarding, this LTM. The low-order six octets contain a 48-bit IEEE MAC address unique to the system in which the MEP Linktrace Initiator or Linktrace Responder resides. The high-order two octets contain a value sufficient to uniquely identify the MEP Linktrace Initiator or Linktrace Responder within that system. For most Bridges, the address of any MAC attached to the Bridge will suffice for the low-order six octets, and 0 for the high-order octets. In some situations, e.g. if multiple virtual Bridges utilizing emulated LANs are implemented in a single physical system, the high-order two octets can be used to differentiate among the transmitting entities. The value returned is undefined if dot1agCfmMepTransmitLtmResult is false.
BIT dot1agCfmMepTransmitLtmFlags	1.0.8802.1.1.3.1.6.1.1.43	Bits	read-create	The flags field for LTMs transmitted by the MEP.
T/F dot1agCfmMepTransmitLtmResult	1.0.8802.1.1.3.1.6.1.1.48	TruthValue	read-only	Indicates the result of the operation: - true The Linktrace Message will be (or has been) sent. - false The Linktrace Message will not be sent
U32 dot1agCfmMepTransmitLtmSeqNumber	1.0.8802.1.1.3.1.6.1.1.49	Unsigned32	read-only	The LTM Transaction Identifier (dot1agCfmMepLtmNextSeqNumber) of the LTM sent. The value returned is undefined if dot1agCfmMepTransmitLtmResult is false.
T/F dot1agCfmMepTransmitLtmStatus	1.0.8802.1.1.3.1.6.1.1.42	TruthValue	read-write	A Boolean flag set to true by the bridge port to indicate that another LTM may be transmitted. Reset to false by the MEP Linktrace Initiator State Machine.
T/F dot1agCfmMepTransmitLtmTargetIsMepId	1.0.8802.1.1.3.1.6.1.1.46	TruthValue	read-create	True indicates that MepID of the target MEP is used for Linktrace transmission. False indicates that unicast destination MAC address of the target MEP is used for Loopback transmission.
MAC dot1agCfmMepTransmitLtmTargetMacAddress	1.0.8802.1.1.3.1.6.1.1.44	MacAddress	read-create	The Target MAC Address Field to be transmitted: A unicast destination MAC address. This address will be used if the value of the column dot1agCfmMepTransmitLtmTargetIsMepId is 'false'.
DOT dot1agCfmMepTransmitLtmTargetMepId	1.0.8802.1.1.3.1.6.1.1.45	Dot1agCfmMepIdOrZero	read-create	An indication of the Target MAC Address Field to be transmitted: The Maintenance association End Point Identifier of another MEP in the same Maintenance Association This address will be used if the value of the column dot1agCfmMepTransmitLtmTargetIsMepId is 'true'.
U32 dot1agCfmMepTransmitLtmTtl	1.0.8802.1.1.3.1.6.1.1.47	Unsigned32	read-create	The LTM TTL field. Default value, if not specified, is 64. The TTL field indicates the number of hops remaining to the LTM. Decremented by 1 by each Linktrace Responder that handles the LTM. The decremented value is returned in the LTR. If 0 on input, the LTM is discarded. If 0 on output, the LTM is not transmitted to the next hop.
C32 dot1agCfmMepUnexpLtrIn	1.0.8802.1.1.3.1.6.1.1.30	Counter32	read-only	The total number of unexpected LTRs received (20.39.1).
T/F dot1agCfmMepXconCcmDefect	1.0.8802.1.1.3.1.6.1.1.20	TruthValue	read-only	A Boolean flag indicating that a stream of CCMs is being received from a MEP that may be in some other MA.
OCT dot1agCfmMepXconCcmLastFailure	1.0.8802.1.1.3.1.6.1.1.22	OCTET STRING	read-only	The last-received CCM that triggered a DefXconCCM fault.
dot1agCfmNotificationsGroup	1.0.8802.1.1.3.2.2.8			Objects for the Notifications group.
dot1agCfmStack	1.0.8802.1.1.3.1.1
DOT dot1agCfmStackDirection	1.0.8802.1.1.3.1.1.1.1.2	Dot1agCfmMpDirection	not-accessible	Direction in which the MP faces on the Bridge Port
dot1agCfmStackEntry	1.0.8802.1.1.3.1.1.1.1		not-accessible	The Stack table entry
dot1agCfmStackGroup	1.0.8802.1.1.3.2.2.1			Objects for the Stack group.
NUM dot1agCfmStackifIndex	1.0.8802.1.1.3.1.1.1.1.1	InterfaceIndex	not-accessible	This object represents the Bridge Port or aggregated port on which MEPs or MHFs might be configured.
MAC dot1agCfmStackMacAddress	1.0.8802.1.1.3.1.1.1.1.4	MacAddress	read-only	MAC address of the MP.
DOT dot1agCfmStackMepId	1.0.8802.1.1.3.1.1.1.1.3	Dot1agCfmMepIdOrZero	read-only	If an MEP is configured, the MEPID, else 0
dot1agCfmStackTable	1.0.8802.1.1.3.1.1.1		not-accessible	There is one CFM Stack Managed object per bridge. It permits the retrieval of information about the maintenance Points configured on any given interface.
dot1agMIBObjects	1.0.8802.1.1.3.1
dot1agNotifications	1.0.8802.1.1.3.0
ieee8021cfmMIB	1.0.8802.1.1.3			Conectivity Fault Management module for managing IEEE 802.1ag

RFC description

Implements IEEE 802.1ag Connectivity Fault Management for Ethernet networks. Manages maintenance domains, association levels, and link fault detection.

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Download IEEE802171-CFM-MIB