BRCM-CABLEDATA-PRIVATE-MIB

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Organization: Broadcom Corporation

Last Updated: 2002-06-04

Category: Cable/DOCSIS

Description: Defines private vendor-specific management extensions for Broadcom cable data products.

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What Is BRCM-CABLEDATA-PRIVATE-MIB?

BRCM-CABLEDATA-PRIVATE-MIB is a Broadcom vendor-specific MIB used across Broadcom's cable-data chipset platform, found in DOCSIS cable modems and related devices, to gate access to Broadcom's other private/proprietary MIB extensions. Rather than exposing operational counters or environmental sensors, it defines a private-MIB "enable key" mechanism — a table of keys that must be set correctly to unlock visibility into other Broadcom-private MIB trees on the device. It is therefore primarily a software/configuration-status MIB: its key objects reveal whether vendor-private diagnostic or factory MIBs are currently accessible on the device, rather than exposing direct hardware health metrics such as temperature or CPU load. It underlies and gates access to other Broadcom private MIBs, such as BRCM-HOMEPLUG-FACTORY-MIB, that build on the same private tree. It's typically found in DOCSIS cable modems, gateways, and set-top devices built on Broadcom cable-data system-on-chip platforms. Engineers can download the BRCM-CABLEDATA-PRIVATE-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in BRCM-CABLEDATA-PRIVATE-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

Broadcom cable-data chipset-based cable modem
DOCSIS gateway/set-top device (Broadcom SoC)

Monitoring Examples

A technician would set cdPrivateMibEnableKeyTable entries, keyed by cdPvtMibEnableKeyIndex and holding cdPvtMibEnableKeyValue, and check cdPvtMibEnableKeyStatus to confirm whether the correct unlock key has been accepted, which determines whether Broadcom's other private MIB objects become visible for deeper diagnostics. cdPrivateMibEnable acts as a master switch/flag indicating whether private-MIB access is currently enabled on the device. This is used less for ongoing performance monitoring than for controlling access during factory test or advanced field troubleshooting sessions.

What Can Be Monitored

private-MIB enable/unlock status
private-MIB access key value and validation state
master private-MIB enable flag

Imported Objects

From BRCM-CABLEDATA-SMI

cableDataPrivate

OBJECT-IDENTITY

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
cableDataPrivateMIB	1.3.6.1.4.1.4413.50.1.2.1			Broadcom cabledata private MIB
cableDataPrivateMIBObjects	1.3.6.1.4.1.4413.50.1.2.1.1
cableDataPrivateBase	1.3.6.1.4.1.4413.50.1.2.1.1.1
INT cdPrivateMibEnable	1.3.6.1.4.1.4413.50.1.2.1.1.1.1	INTEGER	read-write	Setting this object to disabled(0) causes the entire cableDataPrivate branch of the MIB to permanently disappear. Once all private operations are complete, this object should be set to disabled(0). Setting this object to factory(1) will expose the cableDataPrivateFactory branch, but will hide the cableDataPrivateEngineering branch. Setting this object to engineering(2) will expose the cableDataPrivateEngineering branch in addition to the cableDataPrivateFactory branch. Initial value for this object is factory(1).
cdPrivateMibEnableKeyTable	1.3.6.1.4.1.4413.50.1.2.1.1.1.2		not-accessible	A table which may be used to re-enable the private MIB after privateMibEnable is set to false. This table contains a list of keys, all of which must be set to their current values in a single SNMP-SET PDU in order to set privateMibEnable back to manufacturing. If the table is empty, then this mechanism is disabled and the private MIB cannot be re-enabled. The number of keys required to re-enable the private MIB is controlled at configuration time by the number of entries created in the table. Although there is no theoretical maximum to the number of keys which may be required, a particular device is likely to have non-volatile storage constraints which will limit the maximum number of entries. If an attempt is made to create more rows than the device can support, an error code of NO CREATION will be returned.
cdPrivateMibEnableKeyEntry	1.3.6.1.4.1.4413.50.1.2.1.1.1.2.1		not-accessible	An entry identifying a single key value used to re-enable the private MIB once it has been disabled.
I32 cdPvtMibEnableKeyIndex	1.3.6.1.4.1.4413.50.1.2.1.1.1.2.1.1	Integer32	not-accessible	A unique value used to identify this key instance. Note that the indices need not be sequential, although they must be positive. Also note that a particular device may have non-volatile storage constraints which limit the value of this object. If an attempt is made to create a row which has an index that is not valid for the particular device, an error code of NO CREATION will be returned.
OCT cdPvtMibEnableKeyValue	1.3.6.1.4.1.4413.50.1.2.1.1.1.2.1.2	OCTET STRING	read-create	A value used to control re-enabling of the private MIB once it has been disabled. If the private MIB is disabled, the only value which may be successfully set to this object is its current value. If the MIB is enabled, then this value may be set to any value in order to configure the table. Note that there is no theoretical limit to the size of this string, although a particular device is likely to have non-volatile storage constraints which will limit the size of the value. If an attempt is made to set this value to too large of a string, an error code of WRONG LENGTH will be returned. Also note that this value may contain hex values as well as ASCII printable ones.
ROW cdPvtMibEnableKeyStatus	1.3.6.1.4.1.4413.50.1.2.1.1.1.2.1.3	RowStatus	read-create	Controls and reflects the status of rows in this table. Rows in this table may be created by either the create-and-go or create-and-wait paradigms. There is no restriction on changing values in a row of this table while the row is active. Setting the value of this object to active (either directly or indirectly via create-and-go) will cause the row to be written to non-volatile storage. Changing the value of cdPrivateEnableKeyValue while the row is active will also cause the row to be written to non-volatile storage.

RFC description

Broadcom private MIB for cabledata products providing vendor-specific management and configuration options for cable equipment.

Start monitoring Broadcom-chipset DOCSIS cable modems/gateways 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 BRCM-CABLEDATA-PRIVATE-MIB

What Is BRCM-CABLEDATA-PRIVATE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description