REDSTONE-FRACTIONAL-T1-MIB

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Organization: Redstone Communications, Inc.

Last Updated: 1999-07-14

Category: DSL and Broadband Access

Description: Manages fractional T1 channel-group configuration and bandwidth allocation on Redstone routers.

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What Is REDSTONE-FRACTIONAL-T1-MIB?

REDSTONE-FRACTIONAL-T1-MIB is a private MIB from Redstone Communications for managing fractional T1 (channelized DS1) configuration on its routers/access equipment, where only a subset of a T1's 24 timeslots is allocated to a given logical interface. It exposes configuration objects for building and indexing fractional T1 interfaces, including the timeslot map/bitmask, per-timeslot data rate, the underlying physical DS1 interface it rides on, data polarity, and loopback settings. This module is primarily used to verify software/configuration correctness of fractional T1 channel groups -- confirming the timeslot allocation, rate, and loopback state match the intended circuit configuration -- and a loopback left enabled or a wrong timeslot map would explain a fractional T1 link that isn't passing expected traffic. It layers fractional-channel objects on top of a lower-layer DS1 interface, implying dependence on the standard DS1-MIB or an equivalent physical-layer T1 MIB for the underlying line. It is typically deployed on Redstone WAN access routers providing sub-rate (fractional) T1 circuits to branch or customer sites. Engineers can download the REDSTONE-FRACTIONAL-T1-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in REDSTONE-FRACTIONAL-T1-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

Redstone Communications WAN access router

Monitoring Examples

An operator would walk rsFt1IfTable/rsFt1IfEntry indexed by rsFt1IfIndex to check rsFt1IfTimeSlotMap and rsFt1IfTimeSlotRate against the provisioned circuit, and confirm rsFt1IfLowerIfIndex correctly references the physical DS1 port carrying the fractional channel. Checking rsFt1IfLoopbackConfig would reveal whether a loopback was inadvertently left active, which would explain a fractional T1 circuit passing no real traffic even though the physical DS1 line shows up. rsFt1IfDataPolarity mismatches could also explain bit errors on a fractional T1 channel connected to certain carrier equipment.

What Can Be Monitored

fractional T1 timeslot map
timeslot data rate
channel-group interface status
data polarity setting
loopback configuration

Imported Objects

From IF-MIB

InterfaceIndex
InterfaceIndexOrZero

From REDSTONE-SMI

rsMgmt

OBJECT-IDENTITY

From REDSTONE-TC

RsNextIfIndex
RsTimeSlotMap

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
rsFt1MIB	1.3.6.1.4.1.2773.2.6			The Fractional T1 MIB for the Redstone Communications Inc. enterprise.
rsFt1Objects	1.3.6.1.4.1.2773.2.6.1
RSN rsFt1NextIfIndex	1.3.6.1.4.1.2773.2.6.1.1	RsNextIfIndex	read-only	Coordinate ifIndex value allocation for entries in rsFt1IfTable. A GET of this object returns the next available ifIndex value to be used to create an entry in the associated interface table; or zero, if no valid ifIndex value is available. This object also returns a value of zero when it is the lexicographic successor of a varbind presented in an SNMP GETNEXT or GETBULK request, for which circumstance it is assumed that ifIndex allocation is unintended. Successive GETs will typically return different values, thus avoiding collisions among cooperating management clients seeking to create table entries simultaneously.
rsFt1IfTable	1.3.6.1.4.1.2773.2.6.1.2		not-accessible	This table contains entries for FT1 interfaces present in the system.
rsFt1IfEntry	1.3.6.1.4.1.2773.2.6.1.2.1		not-accessible	Each entry describes the characteristics of an FT1 interface. Creating/deleting entries in this table causes corresponding entries for be created /deleted in ifTable/ifXTable/rsIfTable.
NUM rsFt1IfIndex	1.3.6.1.4.1.2773.2.6.1.2.1.1	InterfaceIndex	not-accessible	The ifIndex of the FT1 interface. When creating entries in this table, suitable values for this object are determined by reading rsFt1NextIfIndex.
ROW rsFt1IfRowStatus	1.3.6.1.4.1.2773.2.6.1.2.1.2	RowStatus	read-create	Controls creation/deletion of entries in this table according to the RowStatus textual convention, constrained to support the following values only: createAndGo destroy To create an entry in this table, the following entry objects MUST be explicitly configured: rsFt1IfRowStatus rsFt1IfLowerIfIndex rsFt1IfTimeSlotMap In addition, when creating an entry the following conditions must hold: A value for rsFt1IfIndex must have been determined previously, by reading rsFt1NextIfIndex. The DS1 interface identified by rsFt1IfLowerIfIndex must exist. The DS0s specified in rsFt1IfTimeSlotMap must be available (unallocated) on the DS1 interface identified by rsFt1IfLowerIfIndex. A corresponding entry in ifTable/ifXTable/rsIfTable is created/destroyed as a result of creating/destroying an entry in this table.
NUM rsFt1IfLowerIfIndex	1.3.6.1.4.1.2773.2.6.1.2.1.3	InterfaceIndexOrZero	read-create	The ifIndex of a DS1 interface over which this FT1 interface is to be layered. A value of zero indicates no layering. An implementation may choose to require that a nonzero value be configured at entry creation.
RST rsFt1IfTimeSlotMap	1.3.6.1.4.1.2773.2.6.1.2.1.4	RsTimeSlotMap	read-create	A bitmap representing the DS0s on the underlying DS1 interface that have been allocated to this FT1 interface.
INT rsFt1IfTimeSlotRate	1.3.6.1.4.1.2773.2.6.1.2.1.5	INTEGER	read-create	Data rate per time slot allocated to this FT1 interface.
INT rsFt1IfDataPolarity	1.3.6.1.4.1.2773.2.6.1.2.1.6	INTEGER	read-create	Polarity of data transmitted on this FT1 interface. Inverted data is used for certain line coding configurations to ensure sufficient one's density for timing recovery by the remote end.
INT rsFt1IfLoopbackConfig	1.3.6.1.4.1.2773.2.6.1.2.1.7	INTEGER	read-create	Selects loopback configuration. loop(1) causes received data to be looped back out the transmitter.
rsFt1Conformance	1.3.6.1.4.1.2773.2.6.4
rsFt1Compliances	1.3.6.1.4.1.2773.2.6.4.1
rsFt1Compliance	1.3.6.1.4.1.2773.2.6.4.1.1			The compliance statement for entities which implement the Redstone FT1 MIB.
rsFt1Compliance2	1.3.6.1.4.1.2773.2.6.4.1.2			The compliance statement for entities which implement the Redstone FT1 MIB.
rsFt1Groups	1.3.6.1.4.1.2773.2.6.4.2
rsFt1Group	1.3.6.1.4.1.2773.2.6.4.2.1			A collection of objects providing management of FT1 interfaces in a Redstone product.
rsFt1Group2	1.3.6.1.4.1.2773.2.6.4.2.2			A collection of objects providing management of FT1 interfaces in a Redstone product.

RFC description

Manages fractional T1 interface configuration and time slot allocation for Redstone communications.

Start monitoring Redstone Communications WAN access router (fractional/channelized T1 configuration) 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 REDSTONE-FRACTIONAL-T1-MIB

What Is REDSTONE-FRACTIONAL-T1-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description