NBS-OBA-MIB

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Organization: NBS

Last Updated: 2015-03-27

Category: Optical Networking

Description: Manages NBS optical booster amplifier gain, output power, and alarm thresholds.

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What Is NBS-OBA-MIB?

NBS-OBA-MIB is a vendor MIB for managing optical booster amplifiers (OBAs) used in cable/optical bandwidth allocation systems. It exposes configuration and status data about amplifier line interfaces, including per-line unit sizing, maximum bandwidth units, and per-client-port allocation limits, plus threshold-style definitions for gain, output power, and avails. Its monitoring value centers on hardware health and capacity status of the optical amplifier line cards, tracking available bandwidth units (nbsObaInfoAvails), maximum unit capacity, and per-port allocation so operators can detect over-subscription or amplifier capacity exhaustion. It is a self-contained proprietary MIB built on standard SNMPv2-SMI conventions with no apparent dependency on other functional MIB modules. It is typically deployed by cable/broadband operators managing optical line amplifier chassis in the HFC plant. Engineers can download the NBS-OBA-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NBS-OBA-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

Optical booster amplifier / HFC line amplifier

Monitoring Examples

An operator would poll nbsObaInfoTable/nbsObaInfoEntry rows indexed by nbsObaInfoLineIfIndex to check nbsObaInfoAvails against nbsObaInfoMaxUnits, flagging a line where available bandwidth units are approaching zero. The nbsObaDefineTable/nbsObaDefineEntry rows, keyed by nbsObaDefineLinePort, would be checked to confirm per-port allocation configuration matches provisioning intent. A line reporting nbsObaInfoUnitSize inconsistent with nbsObaInfoMaxUnitsPerClientPort would suggest a misconfigured or overloaded amplifier port.

What Can Be Monitored

available bandwidth units per line
maximum unit capacity
unit size
max units per client port
per-port allocation configuration

Imported Objects

From IF-MIB

InterfaceIndex

From NBS-MIB

NbsTcMHz
nbs	OBJECT-IDENTITY

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
RowStatus

How to Use in IPNetwork Monitor

Example using nbsObaDefineTableSize OID:

Select an Optical booster amplifier / HFC line amplifier 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 nbsObaDefineTableSize into the Find box to locate it in the OID tree, then select it and click OK. The number of entries for the nbsObaDefineTable in this port. 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 an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the count changes from its expected baseline, since that would indicate the underlying set of items changed unexpectedly. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
nbsObaMib	1.3.6.1.4.1.629.240			Optical bandwidth allocation (OBA) information.
nbsObaInfoGrp	1.3.6.1.4.1.629.240.1			For users to know if OBA is accessible
nbsObaInfoTable	1.3.6.1.4.1.629.240.1.1		not-accessible	Optical bandwidth allocation (OBA) definition(s); table entries are expected to be configured and viewed from the port-level.
nbsObaInfoEntry	1.3.6.1.4.1.629.240.1.1.1		not-accessible	Optical bandwidth allocation (OBA) definition.
NUM nbsObaInfoLineIfIndex	1.3.6.1.4.1.629.240.1.1.1.1	InterfaceIndex	read-only	The trunk or line port ifindex.
STR nbsObaInfoAvails	1.3.6.1.4.1.629.240.1.1.1.2	DisplayString	read-only	The comma separated list of bandwidth units available to the user
NBS nbsObaInfoUnitSize	1.3.6.1.4.1.629.240.1.1.1.3	NbsTcMHz	read-only	Shows the unit size in MHz
INT nbsObaInfoMaxUnits	1.3.6.1.4.1.629.240.1.1.1.4	INTEGER	read-only	Shows the maximum number of OBA units allowed on this port
INT nbsObaInfoMaxUnitsPerClientPort	1.3.6.1.4.1.629.240.1.1.1.5	INTEGER	read-only	Shows the maximum number of OBA units allowed on client ports
nbsObaDefineGrp	1.3.6.1.4.1.629.240.2			For users to configure OBAs
INT nbsObaDefineTableSizeEx	1.3.6.1.4.1.629.240.2.1	INTEGER	read-only	The number of entries for the nbsObaDefineTable in this port
nbsObaDefineTable	1.3.6.1.4.1.629.240.2.2		not-accessible	Optical bandwidth allocation (OBA) definition(s); table entries are expected to be configured and viewed from the port-level.
nbsObaDefineEntry	1.3.6.1.4.1.629.240.2.2.1		not-accessible	Optical bandwidth allocation (OBA) definition.
NUM nbsObaDefineLinePort	1.3.6.1.4.1.629.240.2.2.1.1	InterfaceIndex	read-only	The line port (aka trunk port) associated with this entry.
INT nbsObaDefineOrdinalIndex	1.3.6.1.4.1.629.240.2.2.1.2	INTEGER	read-only	Ordinal index for this entry; arbitrarily picked, starting from 1. It is hidden from the CLI.
STR nbsObaDefineLabel	1.3.6.1.4.1.629.240.2.2.1.10	DisplayString	read-create	User defined label that uniquely identifies this OBA.
INT nbsObaDefineOduType	1.3.6.1.4.1.629.240.2.2.1.11	INTEGER	read-create	The information structure data unit (data rate): * ODU0 (1.24416 Gb/s)
STR nbsObaDefineOduList	1.3.6.1.4.1.629.240.2.2.1.12	DisplayString	read-create	A comma separated list of data unit identifiers assigned to this OBA; an identifier may be assigned to one OBA only. ODU0 identifiers are the letters a-h. The count of identifiers determines the maximum bandwidth available, based on nbsObaDefineOduType. Just enough should be assigned to convey the desired protocol; an overly generous assignment wastes a limited resource and reduces overall service capacity.
INT nbsObaDefineOduCount	1.3.6.1.4.1.629.240.2.2.1.13	INTEGER	read-only	The count of identifiers found in nbsObaDefineOduList.
INT nbsObaDefineMapType	1.3.6.1.4.1.629.240.2.2.1.20	INTEGER	read-create	Specifies the OBA traffic mapping type: * an express OBA passes from one line port to the other; * a standAlone OBA has no redundant backup; * a primary OBA is the first choice for redundant service; * a secondary OBA provides service when the primary OBA fails.
NUM nbsObaDefineClientPort	1.3.6.1.4.1.629.240.2.2.1.21	InterfaceIndex	read-create	The add/drop client port (aka user or access port) associated with this entry.
STR nbsObaDefineCoupledWith	1.3.6.1.4.1.629.240.2.2.1.22	DisplayString	read-create	This object's content depends on the 'nbsObaDefineMapType' value: * express -- the associated OBA on the other line port; * standAlone -- N/A * primary -- label of the associated secondary OBA; * secondary -- label of the associated primary OBA. Using an OBA's label instead of its ordinal index avoids unexpected and unintential associations after create/delete activities.
INT nbsObaDefinePresentState	1.3.6.1.4.1.629.240.2.2.1.29	INTEGER	read-only	Current OBA status.
INT nbsObaDefineAllocationInfo	1.3.6.1.4.1.629.240.2.2.1.30	INTEGER	read-only	Indicates if the number of units (ODUs) exceed, are under, or match the port protocol specifications.
ROW nbsObaDefineRowStatus	1.3.6.1.4.1.629.240.2.2.1.99	RowStatus	read-create	Used to create and delete OBAs
nbsObaAlsGrp	1.3.6.1.4.1.629.240.3			For users to configure the Automatic Laser Shut-down (ALS) feature
nbsObaAlsTable	1.3.6.1.4.1.629.240.3.1		not-accessible	The Automatic Laser Shutdown (ALS) setting for each port.
nbsObaAlsEntry	1.3.6.1.4.1.629.240.3.1.1		not-accessible	Optical bandwidth allocation (OBA) port.
NUM nbsObaAlsIfIndex	1.3.6.1.4.1.629.240.3.1.1.1	InterfaceIndex	read-only	The ifindex associated with this entry.
INT nbsObaAlsState	1.3.6.1.4.1.629.240.3.1.1.10	INTEGER	read-write	Defines whether the Automatic Laser Shut-down (ALS) feature is enabled or disabled.

RFC description

Network Building Blocks (NBS) vendor-private MIB for Object Bus Architecture defining management objects on enterprise network appliances.

Start monitoring Optical booster amplifier / HFC line amplifier 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 NBS-OBA-MIB