CISCO-WAN-FR-SIGNALING-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2003-03-24

Category: Frame Relay, Vendor: Cisco Devices

Description: Manages Cisco WAN Frame Relay signaling (LMI) configuration and status for PVC management.

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What Is CISCO-WAN-FR-SIGNALING-MIB?

CISCO-WAN-FR-SIGNALING-MIB manages LMI (Local Management Interface) and CLLM (Consolidated Link Layer Management) signaling configuration and statistics for Frame Relay logical ports on Cisco WAN switching platforms. LMI is the signaling protocol that communicates PVC status between a Frame Relay switch and attached devices, using periodic polling timers and error thresholds to detect link problems. The MIB exposes timer/counter configuration such as t391LinkIntegrityTimer, t392PollingVerificationTimer, n391FullStatusPollingCounter, and n392ErrorThreshold, plus per-port status, making it a software/protocol-signaling health monitor: rising signaling errors against n392ErrorThreshold or missed polls indicate a Frame Relay PVC link is degrading or a peer device is not responding correctly to LMI keepalives. It implements the Frame Relay Forum FRF.1.2 LMI extensions (portFRF1Dot2Support) alongside Cisco-proprietary CLLM signaling, tying it to Frame Relay Forum standards. It is deployed in legacy Cisco WAN switch (MGX/BPX) Frame Relay networks for PVC signaling and status monitoring. Engineers can download the CISCO-WAN-FR-SIGNALING-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-WAN-FR-SIGNALING-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

Cisco MGX/BPX WAN Frame Relay switches

Monitoring Examples

An operator would poll frPortCnfSigLMIGrpTable by lmiCnfPortNum to check t391LinkIntegrityTimer and t392PollingVerificationTimer settings match the expected values, then watch n393MonitoredEventCount against n392ErrorThreshold to detect a Frame Relay port accumulating LMI errors. A port with asynchronousUpdates disabled but signallingProtocolType set to a standard requiring them would show delayed PVC status reporting, masking real link failures.

What Can Be Monitored

LMI timer configuration
polling verification counters
signaling error thresholds and event counts
CLLM configuration
FRF.1.2 compliance support

Imported Objects

From BASIS-MIB

frPortCnfSig	OBJECT-IDENTITY
frPortCntSig	OBJECT-IDENTITY

From CISCOWAN-SMI

ciscoWan

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

How to Use in IPNetwork Monitor

Example using rcvStatusInquiry OID:

Select a Cisco MGX/BPX Frame Relay switch 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 rcvStatusInquiry 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 number of Status Inquiry messages received. 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
INT asynchronousUpdates	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.3	INTEGER	read-write	This object is used for configuring asynchronous updates. The possible values are : disable(1) : disable Asynchronous Status Updates & Unsolicited Full Status enable(2) : enable Asynchronous Status Updates fsenable(3) : enable Unsolicited Full Status updfsenable(4) : enable Asynchronous Status Updates & Unsolicited Full Status.
ciscoWanFrCllmGroup	1.3.6.1.4.1.351.150.46.2.1.3			A collection of objects providing information on CLLM applicable to Frame Relay Ports.
ciscoWanFrCllmStatsGroup	1.3.6.1.4.1.351.150.46.2.1.4			A collection of objects providing information applicable to CLLMI statistics on Frame Relay Ports.
ciscoWanFrLmiConfigGroup	1.3.6.1.4.1.351.150.46.2.1.1			A collection of objects providing information applicable to Frame Relay Logical Ports (Frame Relay Ports).
ciscoWanFrLmiStatsGroup	1.3.6.1.4.1.351.150.46.2.1.2			A collection of objects providing information applicable to LMI statistics on Frame Relay Ports.
ciscoWanFrSignalingMIB	1.3.6.1.4.1.351.150.46			The MIB module to configure LMI and CLLM on a frame relay ports. This mib module also contains objects to represent LMI and CLLM statistics information. The frame relay logical port is referred to as 'frame relay port' in this mib. The 'logical port' refers to frame relay port. LMI : Local Management Interface. The Frame Relay LMI is a set of enhancements to the basic Frame Relay Specification. The Key Frame Relay LMI extensions include global addressing, virtual circuit status messages and multicasting. The LMI includes support for a keepalive mechanism, which verifies that data is flowing, and a status mechanism, which provides an on-going status report on the DLCIs known to the switch. The LMI Global Addressing extension gives Frame Relay DLCI values global rather than local significance. The global addressing extension adds functionality and manageability to Frame Relay internetworks. The LMI virtual circuit messages provide communication and synchronization between Frame Relay DTE and DCE devices. These messages are periodically report on the status of PVCs, which prevents data from being sent into black holes(that, over PVCs that no longer exist). LMI UNI signaling enables subscribers to find out about the PVC status of the network, thus inhibiting the use of an unavailable PVC and supplies procedures for detecting and modifying following events: * deletion of a PVC * addition of a PVC * availability of a configured PVC * unavailability of a configured PVC * error due to LMI message sequencing ELMI : Enhanced LMI ELMI allows the router to learn QoS(Quality of Service) parameters from the switch and use them for traffic shaping, configuration or management purposes. CLLM : Consolidated Link Layer Management. The CLLM is an out-of-band mechanism to transport congestion-related information to the far end. The CLLM enables the Frame Relay network to more efficiently relay congestion notifications to the DTE(router). The CLLM congestion notification is sent on the reserved data link connection identifier(DLCI) 1023. Frame Forwarding Port: Frame Forwarding Ports are identified by portType = frame-forward(3). The signaling parameters are not applicable to these ports.
I32 cllmCnfPortNum	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1.1.1	Integer32	read-only	The value of this object identifies the frame relay port. The value of this object must be same as the value of 'portNum' from frPortCnfPortGrpTable. The Frame Forwarding Port value is not valid for this object.
INT cllmEnable	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1.1.2	INTEGER	read-write	This object is used for enabling/disabling CLLM on frame relay port. When set to 'disabled', CLLM is disabled. When set to 'enabled', CLLM is enabled.
C32 cllmFailures	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.6	Counter32	read-only	The number of times an expected CLLM message was not received.
I32 cllmSigPortNum	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.1	Integer32	read-only	The value of this object identifies the frame relay port. The value of this object must be same as the value of 'portNum' from frPortCnfPortGrpTable. The Frame Forwarding Port value is not valid for this object.
cwfSignalingMIBCompliance	1.3.6.1.4.1.351.150.46.2.2.1			The compliance statement for SNMP entities which have network interfaces.
cwfSignalingMIBCompliances	1.3.6.1.4.1.351.150.46.2.2
cwfSignalingMIBConformance	1.3.6.1.4.1.351.150.46.2
cwfSignalingMIBGroups	1.3.6.1.4.1.351.150.46.2.1
INT enhancedLmi	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.9	INTEGER	read-write	This object enables/disables the Enhanced LMI (ELMI) on the frame relay port.
frPortCnfSigCLLMGrp	1.3.6.1.4.1.351.110.5.1.1.1.2.2
frPortCnfSigCLLMGrpEntry	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1.1		not-accessible	An entry for each frame relay port. The entries are applicable only for following ports: portType = frame-relay(1), portType = frFUNI(2). This table is not applicable for Frame Forwarding ports,i.e portType = frame-forward(3).
frPortCnfSigCLLMGrpTable	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1		not-accessible	This table is configuring the CLLM on frame relay ports. This table is not applicable for Frame Forwarding ports.
frPortCnfSigLMIGrp	1.3.6.1.4.1.351.110.5.1.1.1.2.1
frPortCnfSigLMIGrpEntry	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1		not-accessible	An entry for each frame relay port. The entries are applicable only for following ports: portType = frame-relay(1), portType = frFUNI(2). This table is not applicable for Frame Forwarding ports,i.e portType = frame-forward(3).
frPortCnfSigLMIGrpTable	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1		not-accessible	This table is for configuration of singaling(LMI) on frame relay ports.
frPortCntSigCLLMGrp	1.3.6.1.4.1.351.110.5.1.1.2.2.2
frPortCntSigCLLMGrpEntry	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1		not-accessible	An entry for frame relay port. The entries are applicable only for following ports: portType = frame-relay(1), portType = frFUNI(2). This table is not applicable for Frame Forwarding ports,i.e portType = frame-forward(3).
frPortCntSigCLLMGrpTable	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1		not-accessible	This table is for CLLM statistics for frame relay ports.
frPortCntSigLMIGrp	1.3.6.1.4.1.351.110.5.1.1.2.2.1
frPortCntSigLMIGrpEntry	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1		not-accessible	An entry for each frame relay port. Each entry identifies the LMI statistics supported on a frame relay port. The entries are applicable only for following ports: portType = frame-relay(1), portType = frFUNI(2). This table is not applicable for Frame Forwarding ports,i.e portType = frame-forward(3).
frPortCntSigLMIGrpTable	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1		not-accessible	This table contains the LMI statistics of frame relay ports.
I32 lmiCnfPortNum	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.1	Integer32	read-only	The value of this object identifies the frame relay port. The value of this object must be same as the value of 'portNum' from frPortCnfPortGrpTable. The Frame Forwarding Port value is not valid for this object.
I32 lmiSigPortNum	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.1	Integer32	read-only	The value of this object refers to the frame relay port. The value for this object must be same as the 'portNum' object defined in frPortCnfPortGrpTable. The frame forwarding port value is not valid for this object.
I32 n391FullStatusPollingCounter	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.6	Integer32	read-write	The value of this object identifies the User-Side 391 full status polling cycle value for this UNI/NNI logical port.
I32 n392ErrorThreshold	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.7	Integer32	read-write	The value of this object identifies the desired User-side/Network-side N392 error threshold value for this UNI/NNI logical port.
I32 n393MonitoredEventCount	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.8	Integer32	read-write	The value of this object identifies the desired User-side/Network-side N393 monitored events count value for this UNI/NNI logical port.
C32 nniSignalingTimeout	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.12	Counter32	read-only	The number of times NNI Status requests were not received.
INT portFRF1Dot2Support	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.10	INTEGER	read-write	This object enables/disables the FRF 1.2 feature. This object is added for FRSM12. This object is not applicable to MGX Release 1.x
INT portLmiSigConfMethod	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.11	INTEGER	read-write	This object enables/disables the port LMI signalling autosense. Setting this object to autosense(2) enables the port to autodetect and configure port LMI signalling type. signallingProtocolType mib should be set to noSignalling while this object is being set to autosense(2). If signallingProtocolType mib is set to a value other than noSignalling while this object is being set to autosense(2), the set request fails. When this object is set to manual(1), user needs to manually configure the port LMI signalling type using the signallingProtocolType mib. signallingProtocolType can be configured to any valid value including noSignalling when this object is set to manual(1).
C32 rcvAsynchUpdate	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.10	Counter32	read-only	The number of times Asynch Status messages received
C32 rcvBytesCLLM	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.3	Counter32	read-only	The number of CLLM bytes received.
INT rcvCLLMStatusTimer	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1.1.4	INTEGER	read-only	Timeout value for receiving CLLM updates.
C32 rcvFramesCLLM	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.2	Counter32	read-only	The number of CLLM frames received.
C32 rcvInvalidRequest	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.3	Counter32	read-only	The number of Invalid Request messages received.
C32 rcvNNISeqMismatch	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.11	Counter32	read-only	The number of times NNI messages with sequence number mismatches were received.
C32 rcvStatus	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.9	Counter32	read-only	The number of times Status response messages received.
C32 rcvStatusInquiryEx	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.2	Counter32	read-only	The number of Status Inquiry messages received.
C32 rcvUNISeqMismatch	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.4	Counter32	read-only	The number of times UNI messages with sequence number mismatches were received.
INT signallingProtocolType	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.2	INTEGER	read-write	The value of this object is used for configuring the LMI signaling protocol type. 1 - other. Not a valid value for SET request. 2 - noSignalling 3 - strataLMI 4 - annexAUNI 5 - annexDUNI 6 - annexANNI 7 - annexDNNI The ports with portType = frame-forward(3) can be set to noSingalling(2) only. The value strataLMI(3) is not supported for portHeaderLen = fourOctets(2).
I32 t391LinkIntegrityTimer	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.4	Integer32	read-write	The value of this object identifies the desired User-side T391 link integrity verification polling timer value for this UNI/NNI logical port.
I32 t392PollingVerificationTimer	1.3.6.1.4.1.351.110.5.1.1.1.2.1.1.1.5	Integer32	read-write	The value of this object identifies the desired Network-side T392 polling verification timer value (nT2 for LMI) for this UNI/NNI logical port. This is the length of time the network should wait between Status Inquiry Messages.
C32 uniSignalingTimeout	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.7	Counter32	read-only	The number of times UNI Status requests were not received.
C32 xmtAsynchUpdate	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.6	Counter32	read-only	The number of times Asynch Status messages transmitted.
C32 xmtBytesCLLM	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.5	Counter32	read-only	The number of CLLM bytes transmitted.
I32 xmtCLLMStatusTimer	1.3.6.1.4.1.351.110.5.1.1.1.2.2.1.1.3	Integer32	read-write	Interval in milliseconds for CLLM to send CLLM updates.
C32 xmtFramesCLLM	1.3.6.1.4.1.351.110.5.1.1.2.2.2.1.1.4	Counter32	read-only	The number of CLLM frames transmitted.
C32 xmtStatus	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.5	Counter32	read-only	The number of times Status response messages transmitted.
C32 xmtStatusInquiry	1.3.6.1.4.1.351.110.5.1.1.2.2.1.1.1.8	Counter32	read-only	The number of Status Inquiry messages transmitted.

RFC description

Cisco Frame Relay WAN signaling MIB for managing LMI and CLLM protocols on Frame Relay ports.

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Download CISCO-WAN-FR-SIGNALING-MIB