CISCO-ATM-SWITCH-FR-RM-MIB

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Organization: Cisco Systems

Last Updated: 1998-07-20

Category: ATM, Frame Relay

Description: Manages resource management for Frame Relay to ATM interworking on Cisco switches.

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What Is CISCO-ATM-SWITCH-FR-RM-MIB?

CISCO-ATM-SWITCH-FR-RM-MIB is a Cisco module addressing Frame Relay/FUNI-to-ATM Interworking Function (IWF) resource management, specifically for Frame Relay Port Adapter Module (PAM) interfaces referencing the FRF.5, FRF.8, and ATM Forum FUNI standards. It exposes configuration objects for per-VC queue thresholds, VBR (Variable Bit Rate) service overflow handling, and general Frame Relay interface configuration on interworking adapters. This supports monitoring the health of Frame Relay-to-ATM interworking resource management, such as tracking discard and mark thresholds for input/output queues to detect congestion or buffer exhaustion on interworked circuits, and observing VBR overflow conditions that indicate the adapter is exceeding its provisioned service category. It is explicitly dependent on Frame Relay Forum (FRF.5, FRF.8) and ATM Forum FUNI specifications for the interworking model it manages. It is deployed on Cisco switches equipped with Frame Relay Port Adapter Modules performing FR/FUNI-to-ATM interworking, typically in carrier or enterprise WAN environments bridging Frame Relay and ATM networks. Engineers can download the CISCO-ATM-SWITCH-FR-RM-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-ATM-SWITCH-FR-RM-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 switches with Frame Relay Port Adapter Module (PAM)
Cisco ATM/Frame Relay interworking devices

Monitoring Examples

An admin would poll cfaAdapterIfVcQThresholdTable (via cfaAdapterIfVcQThresholdEntry) to check cfaAdapterIfVcQInqDiscThresh and cfaAdapterIfVcQOutqDiscThresh, the input/output queue discard thresholds for a given interworked VC, alongside the corresponding mark thresholds cfaAdapterIfVcQInqMarkThresh/cfaAdapterIfVcQOutqMarkThresh. Rising counts against cfaAdapterIfVbrServOflowTable's cfaAdapterIfVbrServOflow object would reveal that VBR traffic on that adapter is overflowing its configured service category, indicating congestion or a mismatch between provisioned and actual traffic. cfaAdapterIfFrConfigTable provides the underlying Frame Relay interface configuration context for those metrics.

What Can Be Monitored

per-VC input/output queue discard thresholds
per-VC queue mark thresholds
VBR service overflow counts
Frame Relay interface configuration on interworking adapters

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From RFC1213-MIB

ifIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using cfaInterworkIfRxAvailRate OID:

Select a Cisco ATM/Frame Relay interworking 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 cfaInterworkIfRxAvailRate 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 available bit rate for traffic received on the Frame Relay interface. 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 Gauge32-type OID, Value bounds is the most useful condition here — trigger an alert if the value drifts significantly from its normal baseline (in bits-per-second), since an unexpected change often points to a real underlying issue. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoAtmSwitchFrRmMIB	1.3.6.1.4.1.9.9.110			This MIB module describes a set of objects used for switch Resource Management (RM) for Frame Relay/Frame based User-to-Network (FUNI) to ATM interworking function (IWF) connections. Please refer to the Frame Relay Forum documents FRF.5 and FRF.8 for details on the Frame Relay to ATM Interworking Functions. For details on FUNI, please refer to the ATM Forum FUNI Specification document. These objects are applicable to Frame Relay and FUNI interfaces present on the Frame Relay Port Adapter Module (PAM). Initial version of this MIB module.
ciscoAtmSwitchFrRmMIBObjects	1.3.6.1.4.1.9.9.110.1
cfaAdapter	1.3.6.1.4.1.9.9.110.1.1
cfaAdapterIfVcQThresholdTable	1.3.6.1.4.1.9.9.110.1.1.1		not-accessible	A table of per-VC queue threshold parameters that are used for congestion control for Frame Relay/FUNI to ATM Interworking Function connections, on the Frame Relay Port Adapter Module. These objects become available as each Frame Relay and FUNI interface is defined on the device. The corresponding ifTypes are frameRelayService(44) and atmFuni(106) respectively. An unique set of threshold parameters are available for every supported Interworking Function service category, and would be applied to all connections belonging to that particular service category, on that Frame Relay or FUNI interface.
cfaAdapterIfVcQThresholdEntry	1.3.6.1.4.1.9.9.110.1.1.1.1		not-accessible	A set of per-VC queue threshold parameters that are used for congestion control for Frame Relay/FUNI to ATM Interworking Function connections, on the Frame Relay Port Adapter Module. The ifIndex in the index clause refers to MIB-II's ifIndex corresponding to frame-based ATM PAM ports, i.e., Frame Relay and FUNI.
NUM cfaAdapterIfVcQService	1.3.6.1.4.1.9.9.110.1.1.1.1.1	CfaInterworkServiceCategory	not-accessible	The service category of the connection to which this entry applies.
INT cfaAdapterIfVcQInqDiscThresh	1.3.6.1.4.1.9.9.110.1.1.1.1.2	INTEGER	read-write	This object defines the Discard Eligible threshold applied to the Frame Relay - ATM interworking virtual circuit input queue, on the Frame Relay PAM. The input queue is in the direction of Frame Relay/FUNI interface to the ATM switch fabric. If the fill level of the input queue for the Frame Relay - ATM interworking virtual circuit exceeds this threshold, all frames arriving on this virtual circuit from the Frame Relay side will be discarded at the interface if the arriving frame has its Discard Eligible bit set. The threshold value is expressed as a percent-of-full. Setting this object to 100 effectively turns off the threshold.
INT cfaAdapterIfVcQOutqDiscThresh	1.3.6.1.4.1.9.9.110.1.1.1.1.3	INTEGER	read-write	This object defines the Discard Eligible threshold applied to the Frame Relay - ATM interworking virtual circuit output queue, on the Frame Relay PAM. The output queue is in the direction of the ATM switch fabric to the Frame Relay/FUNI interface. If the fill level of the output queue for the Frame Relay - ATM interworking virtual circuit exceeds this threshold, all frames arriving on this virtual circuit from the ATM switch fabric side will be discarded if the arriving frame has its Discard Eligible bit set. The threshold value is expressed as a percent-of-full. Setting this object to 100 effectively turns off the threshold.
INT cfaAdapterIfVcQInqMarkThresh	1.3.6.1.4.1.9.9.110.1.1.1.1.4	INTEGER	read-write	This object defines the Marking threshold applied to the Frame Relay - ATM interworking virtual circuit input queue, on the Frame Relay PAM. The input queue is in the direction of Frame Relay/FUNI interface to the ATM switch fabric. If the fill level of the input queue for the Frame Relay - ATM interworking virtual circuit exceeds this threshold, the following will happen: 1. For frames coming into the Frame Relay - ATM interworking virtual circuit from the Frame Relay side, the corresponding cells will have the Explicit Forward Congestion Indication (EFCI) bit set in the ATM cell header, on entry into the ATM switch fabric. 2. For cells arriving from the ATM switch fabric side for this Frame Relay - ATM interworking virtual circuit, the corresponding frames will have the Backward Explicit Congestion Notification (BECN) bit set upon exiting the Frame Relay interface. The threshold value is expressed as a percent-of-full. Setting this object to 100 effectively turns off the threshold.
INT cfaAdapterIfVcQOutqMarkThresh	1.3.6.1.4.1.9.9.110.1.1.1.1.5	INTEGER	read-write	This object defines the Marking threshold applied to the Frame Relay - ATM interworking virtual circuit output queue, on the Frame Relay PAM. The output queue is in the direction of the ATM switch fabric to the Frame Relay/FUNI interface. If the fill level of the output queue for the Frame Relay - ATM interworking virtual circuit exceeds this threshold, the following will happen: 1. For frames coming into the Frame Relay - ATM interworking virtual circuit from the Frame Relay side, the frame will have the BECN bit set in the Frame Relay header before getting converted to cells and entering the ATM switch fabric. 2. For cells arriving from the ATM switch fabric side for this Frame Relay - ATM interworking virtual circuit, the corresponding frames will have the Forward Explicit Congestion Notification (FECN) bit set in the Frame Relay header upon exiting the Frame Relay interface. For FUNI - ATM interworking connections, the Congestion Notification (CN) bit gets set in the FUNI header. The threshold value is expressed as a percent-of-full. Setting this object to 100 effectively turns off the threshold.
cfaAdapterIfVbrServOflowTable	1.3.6.1.4.1.9.9.110.1.1.2		not-accessible	A table of Resource Management parameters that are used for VBR Overflow Servicing for Frame Relay/FUNI to ATM Interworking Function connections, on the Frame Relay Port Adapter Module. This object becomes available as each Frame Relay and FUNI interface is defined on the device. The corresponding ifTypes are frameRelayService(44) and atmFuni(106) respectively.
cfaAdapterIfVbrServOflowEntry	1.3.6.1.4.1.9.9.110.1.1.2.1		not-accessible	A set of Resource Management parameters that are used for VBR Overflow Servicing for Frame Relay/FUNI to ATM Interworking Function connections, on the Frame Relay Port Adapter Module.
T/F cfaAdapterIfVbrServOflow	1.3.6.1.4.1.9.9.110.1.1.2.1.1	TruthValue	read-write	Configuration to enable the overflow feature for VBR-NRT connections on the interface. When the PAM services VBR-NRT VC input queues, sending ATM traffic to the switch fabric, it can strictly limit the rate at which the data is sent to contracted sustained cell rate (SCR) for the connection (overflow disabled), or allow data transfer over SCR (overflow enabled). Setting the value to true enables overflow.
cfaAdapterIfFrConfigTable	1.3.6.1.4.1.9.9.110.1.1.3		not-accessible	A table of resource management parameters for the Frame Relay interface on the FR/FUNI Port Adapter Module.
cfaAdapterIfFrConfigEntry	1.3.6.1.4.1.9.9.110.1.1.3.1		not-accessible	An entry in the table, containing information about Resource Management of an Interface with Frame Relay encapsulation.
INT cfaAdapterIfOverbooking	1.3.6.1.4.1.9.9.110.1.1.3.1.1	INTEGER	read-write	This object defines overbooking of CIR on an acess link/port in percent of access rate. The total of all CIR's for all frame-relay pvc's and frame-relay soft-vc's cannot exceed CIR overbooking factor times access rate. For example, overbooking of 200% means the total of all CIR's can be configured up to twice of the access rate. The default is 100% - no overbooking is set.
cfaInterwork	1.3.6.1.4.1.9.9.110.1.2
cfaInterworkIfResourceTable	1.3.6.1.4.1.9.9.110.1.2.1		not-accessible	A table of objects that can be used to view available and allocated resources on Frame Relay and FUNI interfaces defined on a Frame Relay Port Adapter Module (PAM). An unique set of available and allocated resources are available for the transmit direction (going out of the interface to the external world), and receive direction (coming into the interface from the external world). These available and allocated resources are available for every supported Interworking Function service category. These objects become available as each Frame Relay and FUNI interface is defined on the device. The corresponding ifTypes are frameRelayService(44) and atmFuni(106) respectively.
cfaInterworkIfResourceEntry	1.3.6.1.4.1.9.9.110.1.2.1.1		not-accessible	A set of objects that can be used to view available and allocated resources on Frame Relay and FUNI interfaces defined on a Frame Relay Port Adapter Module (PAM).
NUM cfaInterworkIfVcQService	1.3.6.1.4.1.9.9.110.1.2.1.1.1	CfaInterworkServiceCategory	not-accessible	The service category of the connection to which this entry applies.
G32 cfaInterworkIfRxAvailRateEx	1.3.6.1.4.1.9.9.110.1.2.1.1.2	Gauge32	read-only	The available bit rate for traffic received on the Frame Relay interface. This is the bandwidth available for connections. This value decreases as a result of setup of a connection requesting non-zero Committed Information Rate (CIR) in the receive direction, and increases as a result of the release of such a connection.
G32 cfaInterworkIfTxAvailRate	1.3.6.1.4.1.9.9.110.1.2.1.1.3	Gauge32	read-only	The available bit rate for traffic sent out the Frame Relay interface. This is the bandwidth available for connections. This value decreases as a result of setup of a connection requesting non-zero CIR in the transmit direction, and increases as a result of the release of such a connection.
G32 cfaInterworkIfRxAllocRate	1.3.6.1.4.1.9.9.110.1.2.1.1.4	Gauge32	read-only	The allocated bit rate for traffic received on the Frame Relay interface. This is the bandwidth allocated to connections. This value increases as a result of setup of a connection requesting non-zero CIR in the receive direction, and decreases as a result of the release of such a connection.
G32 cfaInterworkIfTxAllocRate	1.3.6.1.4.1.9.9.110.1.2.1.1.5	Gauge32	read-only	The allocated bit rate for traffic sent out the Frame Relay interface. This is the bandwidth allocated to connections. This value increases as a result of setup of a connection requesting non-zero CIR in the transmit direction, and decreases as a result of the release of such a connection.
ciscoAtmSwitchFrRmMIBNotifications	1.3.6.1.4.1.9.9.110.2
ciscoAtmSwitchFrRmMIBConformance	1.3.6.1.4.1.9.9.110.3
ciscoAtmSwitchFrRmMIBCompliances	1.3.6.1.4.1.9.9.110.3.1
ciscoAtmSwitchFrRmMIBCompliance	1.3.6.1.4.1.9.9.110.3.1.1			The compliance statement for the Cisco Frame Relay/FUNI to ATM Interworking Function Resource Management MIB.
ciscoAtmSwitchFrRmMIBGroups	1.3.6.1.4.1.9.9.110.3.2
cfaAdapterGroup	1.3.6.1.4.1.9.9.110.3.2.1			A collection of objects which manage resources for Cisco Frame Relay/FUNI to ATM Interworking Function connections.
cfaInterworkGroup	1.3.6.1.4.1.9.9.110.3.2.2			A collection of objects which manage resources for Cisco Frame Relay/FUNI to ATM Interworking Function connections.

RFC description

ATM resource management for Frame Relay/FUNI interworking on Cisco switch port adapters.

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Download CISCO-ATM-SWITCH-FR-RM-MIB