CISCO-FABRIC-MCAST-APPL-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 2002-12-18

Category: Cisco Devices, Routing Protocols

Description: Provides management objects for multicast application-layer forwarding across the fabric on Cisco switching platforms.

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What Is CISCO-FABRIC-MCAST-APPL-MIB?

CISCO-FABRIC-MCAST-APPL-MIB tracks multicast resource usage within the switch fabric of Cisco data center and switching platforms, specifically Fabric Multicast Group Identifiers (FGIDs) allocated to applications sharing the fabric. It exposes a table of application entries describing which software applications are consuming FGID pools and how many are in use versus available. The MIB supports monitoring software-level resource status by exposing in-use and high-water-mark FGID counts per application, letting administrators detect multicast resource exhaustion that could degrade multicast forwarding. It is Cisco proprietary and is tightly coupled to the platform's broader fabric multicast architecture, typically used alongside other fabric-related Cisco MIBs. It is deployed on Cisco switches with fabric-based multicast forwarding, such as data center switching platforms. Engineers can download the CISCO-FABRIC-MCAST-APPL-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-FABRIC-MCAST-APPL-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 data center switches with fabric-based multicast forwarding

Monitoring Examples

An administrator could poll cfmaApplTable, keyed by cfmaApplId, reading cfmaApplName alongside cfmaApplInuseFgids and cfmaApplHighWaterInuseFGIDs to see how close a given application (identified by cfmaApplPoolId) is to exhausting its allocated multicast group identifiers. A cfmaApplInuseFgids value approaching the historical cfmaApplHighWaterInuseFGIDs or the pool's capacity would warn of impending FGID pool exhaustion, which could block new multicast group creation.

What Can Be Monitored

FGID pool usage per application
in-use FGID count
high-water FGID mark
application pool identifier
application name

Imported Objects

From CISCO-FABRIC-MCAST-MIB

CfmPoolIndex

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From ENTITY-MIB

entLogicalIndex

OBJECT-TYPE

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

How to Use in IPNetwork Monitor

Example using cfmaApplInuseFgids OID:

Select a Cisco data center switches with fabric-based multicast forwarding 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 cfmaApplInuseFgids 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 FGIDs that are currently in use by this application. 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 counter increases sharply between polls relative to its normal baseline (in fgid), 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
ciscoFabricMcastApplMIB	1.3.6.1.4.1.9.9.256			Fabric multicast resource MIB module. This MIB module is used for managing/tracking the fabric multicast resource application related information. Acronyms and terms: FGID - Fabric Multicast Group Identifier.
ciscoFabricMcastApplMIBObjects	1.3.6.1.4.1.9.9.256.1
cfmaAppl	1.3.6.1.4.1.9.9.256.1.1
cfmaApplTable	1.3.6.1.4.1.9.9.256.1.1.1		not-accessible	This table contains fabric multicast resource usage for a particular fabric multicast client application.
cfmaApplEntry	1.3.6.1.4.1.9.9.256.1.1.1.1		not-accessible	The information regarding a single application that uses fabric multicast resource in a logical router. An entry of this table is created when a fabric multicast client application is registered to fabric software for the use of fabric multicast resource from a logical router. A logical router is identified by the value of mib-2 in entLogicalType object of ENTITY-MIB. An entry of this table is deleted when a fabric multicast client application unregistered the use of fabric multicast resource.
U32 cfmaApplId	1.3.6.1.4.1.9.9.256.1.1.1.1.1	Unsigned32	not-accessible	An unique value, greater than zero, for each fabric client application that uses fabric multicast resource.
STR cfmaApplName	1.3.6.1.4.1.9.9.256.1.1.1.1.2	SnmpAdminString	read-only	The name of this fabric multicast client application.
G32 cfmaApplInuseFgidsEx	1.3.6.1.4.1.9.9.256.1.1.1.1.3	Gauge32	read-only	The number of FGIDs that are currently in use by this application.
G32 cfmaApplHighWaterInuseFGIDs	1.3.6.1.4.1.9.9.256.1.1.1.1.4	Gauge32	read-only	The highest number of FGIDs that was in use by this application.
CFM cfmaApplPoolId	1.3.6.1.4.1.9.9.256.1.1.1.1.5	CfmPoolIndex	read-only	The fabric multicast resource pool id for the resource pool which is used by this application.
cfmaMIBNotificationPrefix	1.3.6.1.4.1.9.9.256.2
cfmaMIBNotifications	1.3.6.1.4.1.9.9.256.2.0
cfmaMIBConformance	1.3.6.1.4.1.9.9.256.3
cfmaMIBCompliances	1.3.6.1.4.1.9.9.256.3.1
cfmaMIBCompliance	1.3.6.1.4.1.9.9.256.3.1.1			The compliance statement for entities which implement the CISCO-FABRIC-MCAST-APPL-MIB
cfmaMIBGroups	1.3.6.1.4.1.9.9.256.3.2
cfmaApplGroup	1.3.6.1.4.1.9.9.256.3.2.1			A collection of objects providing information for the applications that use the fabric multicast resource.

RFC description

Manages fabric multicast resource allocation and FGID (Fabric Group ID) tracking on Cisco switches.

Start monitoring Cisco data center switches with fabric-based multicast forwarding 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 CISCO-FABRIC-MCAST-APPL-MIB