EXTREME-CFM-MIB

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Organization: Extreme Networks, Inc.

Last Updated: 2015-05-18

Category: Standard: IEEE 802, Vendor: Extreme Networks

Description: Manages IEEE 802.1ag Connectivity Fault Management (CFM) domains and MEP instances on Extreme Networks equipment.

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What Is EXTREME-CFM-MIB?

EXTREME-CFM-MIB is an Extreme Networks extension to the standard IEEE8021-CFM-MIB, adding vendor-specific objects for IEEE 802.1ag Connectivity Fault Management (CFM), which detects and isolates Ethernet connectivity faults across a maintenance domain. It exposes CFM group tables (name, index, status) and per-group Maintenance End Point (MEP) associations, including remote MEPs and client relationships, along with notification objects for fault events. This MIB is fundamentally a fault-monitoring module: it lets an operator see which CFM groups/MEPs are configured and active, track remote MEP reachability, and receive traps when connectivity faults are detected between MEPs. It explicitly depends on and extends the standard IEEE8021-CFM-MIB, so it must be used together with that base MIB for full CFM object coverage. It is deployed on Extreme Networks switches in carrier Ethernet or enterprise networks using CFM for end-to-end Ethernet service assurance. Network engineers evaluating or troubleshooting this functionality can download the EXTREME-CFM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in EXTREME-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

Extreme Networks Ethernet switch

Monitoring Examples

An operator would check extremeCfmGroupTable, via extremeCfmGroupIndex, for each extremeCfmGroupName and confirm extremeCfmGroupStatus/extremeCfmGroupRowStatus show the CFM domain as active. Reviewing extremeCfmGroupRemoteMEPs against extremeCfmMepIfIndex reveals whether all expected remote maintenance endpoints are still reachable. A remote MEP dropping out of extremeCfmGroupRemoteMEPs, combined with an extremeCfmNotifications trap, would indicate an Ethernet connectivity fault on that CFM path requiring investigation.

What Can Be Monitored

CFM group name and status
CFM group row status
MEP interface association
remote MEP reachability
CFM fault notifications

Imported Objects

From EXTREME-BASE-MIB

extremeAgent

OBJECT-IDENTITY

From IEEE8021-CFM-MIB

Dot1afCfmIndexIntegerNextFree
Dot1agCfmMepId
dot1agCfmMaIndex	OBJECT-TYPE
dot1agCfmMdIndex	OBJECT-TYPE
dot1agCfmMepIdentifier	OBJECT-TYPE

From IF-MIB

InterfaceIndexOrZero

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

DisplayString
RowStatus
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
extremeCfm	1.3.6.1.4.1.1916.1.47			Connectivity Fault Management Extreme Objects MIB. This is an extension to IEEE8021-CFM-MIB for all extreme specific CFM objects.
extremeCfmNotifications	1.3.6.1.4.1.1916.1.47.0
NTF extremeCfmGroupStatusDownUpAlarm	1.3.6.1.4.1.1916.1.47.0.1			A Group status is changed. A notification (DownUpAlarm) is sent to the management entity with the OID of the Group that has detected the status change. The management entity receiving the notification can identify the system from the network source address of the notification, and can identify the Group reporting the status by the indices in the OID of the extremeCfmGroupStatus variable in the notification: dot1agCfmMdIndex - Also the index of the MEP's Maintenance Domain table entry (dot1agCfmMdTable). dot1agCfmMaIndex - Also an index (with the MD table index) of the MEP's Maintenance Association network table entry (dot1agCfmMaNetTable), and (with the MD table index and component ID) of the MEP's MA component table entry (dot1agCfmMaCompTable). dot1agCfmMepIdentifier - MEP Identifier and final index into the MEP table (dot1agCfmMepTable). extremeCfmGroupIndex -Group Identifier and final index into the Group table (extremeCfmGroupTable).
extremeCfmMibObjects	1.3.6.1.4.1.1916.1.47.1
extremeCfmGroup	1.3.6.1.4.1.1916.1.47.1.1
extremeCfmGroupNextIndexTable	1.3.6.1.4.1.1916.1.47.1.1.1		not-accessible	This object contains an unused value for extremeCfmGroupIndex in the extremeCfmGroupTable, or a zero to indicate that none exist.
extremeCfmGroupNextIndexEntry	1.3.6.1.4.1.1916.1.47.1.1.1.1		not-accessible	The conceptual row of extremeCfmGroupNextIndexTable.
NUM extremeCfmGroupNextIndex	1.3.6.1.4.1.1916.1.47.1.1.1.1.1	Dot1afCfmIndexIntegerNextFree	read-only	Value to be used as the index of the Group table entries, for this Maintenance association End Point Identifier when the management entity wants to create a new row in that table.
extremeCfmGroupTable	1.3.6.1.4.1.1916.1.47.1.1.2		not-accessible	This table includes configuration objects and operations for the Group function, mainly used by the registered clients like ERPS,EAPS to know link detection failure through CFM. Each row in the table represents a Group for the defined MEP. This table uses four indices. The first three indices are the indices of the Maintenance Domain, MaNet, and MEP tables. The fourth index is the specific Group on the selected MEP. A Group is created on an existing MEP using extremeCfmGroupIndex in the row creation. Only few objects are writable in this table. The writable objects in this table need to be persistent upon reboot or restart of a device.
extremeCfmGroupEntry	1.3.6.1.4.1.1916.1.47.1.1.2.1		not-accessible	The conceptual row of extremeCfmGroupTable.
U32 extremeCfmGroupIndex	1.3.6.1.4.1.1916.1.47.1.1.2.1.1	Unsigned32	not-accessible	An index to the CFM Groups configuration table which indicates the specific group associated with a MEP. extremeCfmGroupTableNextIndex needs to be inspected to find an available index for row-creation. Referential integrity is necessary, i.e., the index needs to be persistent upon a reboot or restart of a device. The index is never reused for other groups on the same MEP while this group is active. The index value keeps increasing until it wraps to 0. This is to facilitate access control based on a fixed index for an EMS, since the index is not reused.
STR extremeCfmGroupName	1.3.6.1.4.1.1916.1.47.1.1.2.1.2	DisplayString	read-create	The name of a CFM group. Group name can have alpha-numeric, '-' and '_'. It should start with alphabet.
EXT extremeCfmGroupStatus	1.3.6.1.4.1.1916.1.47.1.1.2.1.3	ExtremeCfmGroupOperStatus	read-only	Whether the group is operational or not. The status is set based on associated MEP status and is informed to registered clients. It is set to 'Up' when the group is operational. It is set to 'Down' when the group is non-operational.
NUM extremeCfmMepIfIndex	1.3.6.1.4.1.1916.1.47.1.1.2.1.4	InterfaceIndexOrZero	read-only	This object is the interface index of the interface either a bridge port, or an aggregated IEEE 802.1 link within a bridge port, to which the MEP and hence the group is attached. Upon a restart of the system, the system SHALL, if necessary, change the value of this variable so that it indexes the entry in the interface table with the same value of ifAlias that it indexed before the system restart. If no such entry exists, then the system SHALL set this variable to 0.
STR extremeCfmGroupRemoteMEPs	1.3.6.1.4.1.1916.1.47.1.1.2.1.5	DisplayString	read-only	Lists the Remote MEPs associated with a group. Not all Remote MEPs of an MA may be associated with a group.
STR extremeCfmGroupClients	1.3.6.1.4.1.1916.1.47.1.1.2.1.6	DisplayString	read-only	Lists all the registered clients with a group. The clients are informed with link failure or recovery through group status notifications.
ROW extremeCfmGroupRowStatus	1.3.6.1.4.1.1916.1.47.1.1.2.1.7	RowStatus	read-create	The status of the row. All columns must have a valid value before a row can be activated.
extremeCfmGroupMepDbTable	1.3.6.1.4.1.1916.1.47.1.1.3		not-accessible	The group Remote MEP Database. A database, maintained by every group, that maintains information about other MEPs in that group.
extremeCfmGroupMepDbEntry	1.3.6.1.4.1.1916.1.47.1.1.3.1		not-accessible	The Group Remote MEP Database table entry.
DOT extremeCfmGroupMepDbRMepId	1.3.6.1.4.1.1916.1.47.1.1.3.1.1	Dot1agCfmMepId	not-accessible	Maintenance association End Point Identifier of a remote MEP whose information from the group MEP Database is to be returned.
ROW extremeCfmGroupMepDbRowStatus	1.3.6.1.4.1.1916.1.47.1.1.3.1.2	RowStatus	read-create	The status of the row. All columns must have a valid value before a row can be activated.
extremeCfmMibConformance	1.3.6.1.4.1.1916.1.47.2
extremeCfmMibCompliances	1.3.6.1.4.1.1916.1.47.2.1
extremeCfmCompliance	1.3.6.1.4.1.1916.1.47.2.1.1			The compliance statement for support of the Extreme CFM MIB module.
extremeCfmMibGroups	1.3.6.1.4.1.1916.1.47.2.2
extremeCfmMepGroup	1.3.6.1.4.1.1916.1.47.2.2.1			Objects for the cfm group.
extremeCfmMepDbGroup	1.3.6.1.4.1.1916.1.47.2.2.2			Objects for the cfm group Remote MEP.
extremeCfmNotificationsGroup	1.3.6.1.4.1.1916.1.47.2.2.3			Objects for the Notifications group.

RFC description

Connectivity Fault Management (CFM) extension providing Extreme-specific CFM objects for IEEE 802.1ag.

Start monitoring Extreme Networks Ethernet switch (802.1ag Connectivity Fault Management extensions) 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 EXTREME-CFM-MIB

What Is EXTREME-CFM-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description