All MIBs › CADANT-CMTS-DOWNCHANNEL-MIB
Organization: ARRIS Group, Inc.
Last Updated: 2015-10-27
Category: DOCSIS and Cable, Vendor: ARRIS
Description:
Manages DOCSIS downstream RF channel configuration and statistics on ARRIS/Cadant C4/E6000 CMTS equipment.
Imported Objects
From CADANT-PRODUCTS-MIB
| cadSpectrum | OBJECT-IDENTITY |
From CADANT-TC
| CardId |
From DOCS-IF-MIB
| TenthdBmV |
From IF-MIB
| InterfaceIndex |
From SNMPv2-SMI
| Counter64 | |
| Integer32 | |
| MODULE-IDENTITY | |
| OBJECT-TYPE | |
| TimeTicks | |
| Unsigned32 |
From SNMPv2-TC
| RowStatus | |
| TEXTUAL-CONVENTION | |
| TimeInterval | |
| TruthValue |
What Is CADANT-CMTS-DOWNCHANNEL-MIB?
CADANT-CMTS-DOWNCHANNEL-MIB is an ARRIS Group, Inc. (Cadant CMTS product line) proprietary MIB configuring DOCSIS downstream-channel parameters on a Cable Modem Termination System. Its downstream-channel table, keyed by channel ID, records frequency, width, modulation, interleave depth, power (and fine-adjustment), CMTS card number, three CAC (Call Admission Control) thresholds, max round-trip delay, DOCSIS annex, normal/emergency/total allowed and reserved bandwidth usage percentages, preemption-allowed flag, ifIndex, primary-capable flag, and spectral-inversion setting, plus a max-frequency constant. As a configuration MIB it lets an administrator confirm downstream RF channel parameters and admission-control thresholds on an ARRIS Cadant CMTS. It is deployed on ARRIS Group Cadant CMTS platforms. Engineers can download the CADANT-CMTS-DOWNCHANNEL-MIB file directly to load it into their MIB browser.
IPNetwork Monitor allows you to monitor SNMP objects defined in CADANT-CMTS-DOWNCHANNEL-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.
What Can Be Monitored
- DOCSIS downstream channel RF parameters and admission-control thresholds
Supported Devices
- ARRIS Group Cadant CMTS platforms
Monitoring Examples
An administrator checks cadIfDownChannelPower and cadIfDownChannelModulation to confirm downstream RF configuration on an ARRIS Cadant CMTS channel.
OIDs
| OID symbolic | OID numeric | Type | Access | Description |
|---|---|---|---|---|
| cadDownchannelMib | 1.3.6.1.4.1.4998.1.1.15.2 | ARRIS CMTS Downstream Channel Configuration and Constants | ||
| cadIfDownstreamChannelTable | 1.3.6.1.4.1.4998.1.1.15.2.1 | not-accessible | This table describes the attributes of downstream channels (frequency bands). | |
| cadIfDownstreamChannelEntry | 1.3.6.1.4.1.4998.1.1.15.2.1.1 | not-accessible | An entry provides a list of attributes for a single Downstream channel. An entry in this table exists for each ifEntry with an ifType of docsCableDownstream(128). | |
| I32 cadIfDownChannelId | 1.3.6.1.4.1.4998.1.1.15.2.1.1.1 | Integer32 | read-only | The Cable Modem Termination System (CMTS) identification of the downstream channel within this particular MAC interface. If the interface is down, the object returns the most current value. If the downstream channel ID is unknown on a DOCSIS channel, this object returns a value of 0. A video downstream channel will have a value of -1. |
| I32 cadIfDownChannelFrequency | 1.3.6.1.4.1.4998.1.1.15.2.1.1.2 | Integer32 | read-write | The center of the downstream frequency associated with this channel. This object will return the current tuner frequency. If this CMTS interface provides IF output only, this object will return 0 and will be treated as read-only. See the associated compliance object for a description of valid frequencies that may be written to this object. |
| I32 cadIfDownChannelWidth | 1.3.6.1.4.1.4998.1.1.15.2.1.1.3 | Integer32 | read-write | The bandwidth of this downstream channel. Most implementations are expected to support a channel width of 6 MHz (North America) and/or 8 MHz (Europe). See the associated compliance object for a description of the valid channel widths for this object. |
| INT cadIfDownChannelModulation | 1.3.6.1.4.1.4998.1.1.15.2.1.1.4 | INTEGER | read-write | The modulation type associated with this downstream channel. If the interface is down, this object either returns the configured value (CMTS), the most current value (CM), or the value of unknown(1). See the associated conformance object for write conditions and limitations. See the reference for specifics on the modulation profiles implied by qam64 and qam256. |
| INT cadIfDownChannelInterleave | 1.3.6.1.4.1.4998.1.1.15.2.1.1.5 | INTEGER | read-write | The Forward Error Correction (FEC) interleaving used for this downstream channel. Values are defined as follows: taps8Increment16(3): protection 5.9/4.1 usec, latency .22/.15 msec taps16Increment8(4): protection 12/8.2 usec, latency .48/.33 msec taps32Increment4(5): protection 24/16 usec, latency .98/.68 msec taps64Increment2(6): protection 47/33 usec, latency 2/1.4 msec taps128Increment1(7): protection 95/66 usec, latency 4/2.8 msec taps12increment17(8): protection 18/14 usec, latency 0.43/0.32 msec If the interface is down, this object either returns the configured value (CMTS), the most current value (CM), or the value of unknown(1). The value of other(2) is returned if the interleave is known but not defined in the above list. See the associated conformance object for write conditions and limitations. See the reference for the FEC configuration described by the setting of this object. non RFC 2670 interleave modes are only available for annex B. |
| TEN cadIfDownChannelPower | 1.3.6.1.4.1.4998.1.1.15.2.1.1.6 | TenthdBmV | read-write | The CMTS operational transmit power. If this CMTS interface does not support output power control then this object will return 0 and be treated as read-only. If the interface is down, this object either returns the configured value or the value of 0. See the reference for recommended and required power levels. |
| I32 cadIfDownChannelPowerFineAdj | 1.3.6.1.4.1.4998.1.1.15.2.1.1.7 | Integer32 | read-write | At the CMTS, the fine power adjustments steps to increase or decrease the output power in incremental steps. |
| CAR cadIfCmtsCardNumber | 1.3.6.1.4.1.4998.1.1.15.2.1.1.19 | CardId | read-only | Card Number associated with this Channel. |
| I32 cadIfDownChannelCACL1Threshold | 1.3.6.1.4.1.4998.1.1.15.2.1.1.21 | Integer32 | read-write | Percentage of available bandwidth on the channel that can be reserved for admitted/active service flows before the channel goes into Level 1 Overload. When a channel goes into Level 1 Overload, a warning message will be logged. Service flow activation/admission will not be denied in Level 1 Overload. If the percentage is set to 0, the default value will be used and reading this object must return the the default L1 threshold. If a set operation tries to change the value of an existing instance of this object to any value that is higher than cadIfDownChannelCACL2Threshold or higher than cadIfDownChannelCACL3Threshold on the same row, then an 'inconsistentValue' error must be returned. |
| I32 cadIfDownChannelCACL2Threshold | 1.3.6.1.4.1.4998.1.1.15.2.1.1.22 | Integer32 | read-write | Percentage of available bandwidth on the channel that can be reserved for admitted/active service flows before the channel goes into Level 2 Overload. When a channel goes into Level 2 Overload, a warning message will be logged. Service flow activation/admission will not be denied in Level 2 Overload. A channel in Level 2 Overload is a good candidate for overload control or load balancing actions. If the percentage is set to 0, the default value will be used and reading this object must return the the default L2 threshold. If a set operation tries to change the value of an existing instance of this object to any value that is higher than cadIfDownChannelCACL3Threshold or lower than cadIfDownChannelCACL1Threshold on the same row, then an 'inconsistentValue' error must be returned. |
| I32 cadIfDownChannelCACL3Threshold | 1.3.6.1.4.1.4998.1.1.15.2.1.1.23 | Integer32 | read-write | Percentage of available bandwidth on the channel that can be reserved for admitted/active service flows. A Registration Request, DSA Request or DSC Request will be denied due to temporary resource limitations if it would result in an active or admitted service flow whose mininum reserved bandwidth would cause this threshold to be exceeded on the downstream channel. If the percentage is set to 0, the default value will be used and reading this object must return the the default L3 threshold. If a set operation tries to change the value of an existing instance of this object to any value that is lower than cadIfDownChannelCACL1Threshold or lower than cadIfDownChannelCACL2Threshold on the same row, then an 'inconsistentValue' error must be returned. |
| I32 cadIfDownChannelMaxRoundTripDelay | 1.3.6.1.4.1.4998.1.1.15.2.1.1.24 | Integer32 | read-write | Maximum round-trip propagation delay for cable plant in Microseconds. Should be configured for the furthest CM in all cable groups containing this DownChannel. Default of 1600 Microseconds is approxiamately 100 miles between the CMTS and the furthest CM. |
| INT cadIfDownChannelAnnex | 1.3.6.1.4.1.4998.1.1.15.2.1.1.26 | INTEGER | read-write | The value of this object indicates the conformance of the implementation to important regional cable standards. annexA : Annex A from ITU-J83 is used. annexB : Annex B from ITU-J83 is used. annexC : Annex C from ITU-J83 is used. |
| I32 cadIfDownChannelPCNormAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.1.1.27 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by non-emergency telephony services. This is also the maximum amount of resources non-exclusively allocated to sessions of this type. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDownChannelPCNormResUsage | 1.3.6.1.4.1.4998.1.1.15.2.1.1.28 | Integer32 | read-write | Minimum percentage of downstream resources that may be used by non-emergency telephony services. This is also the maximum amount of resources exclusively allocated to sessions of this type. If the value of this object is non-zero, then a portion of the downstream bandwidth will be set aside for normal telephony use only - reducing the bandwidth that is available for normal data. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDownChannelPCEmerAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.1.1.29 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by emergency telephony services. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDownChannelPCEmerResUsage | 1.3.6.1.4.1.4998.1.1.15.2.1.1.30 | Integer32 | read-write | Minimum percentage of downstream resources that may be used by emergency telephony services. If the value of this object is non-zero, then a portion of the downstream bandwidth will be set aside for normal telephony use only - reducing the bandwidth that is available for normal data. The default is set from the globals in CadPCMIbBase. |
| I32 cadIfDownChannelPCTotalAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.1.1.31 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by both normal and emergency telephony services. The default is set from the globals in CadPCMibBase. |
| T/F cadIfDownChannelPCPreemptionAllowed | 1.3.6.1.4.1.4998.1.1.15.2.1.1.32 | TruthValue | read-write | Indicates whether the system will preempt another session for an emergency call. The default is set from the globals in CadPCMibBase. |
| NUM cadIfDownChannelIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.1.1.37 | InterfaceIndex | read-only | the ifIndex of this downstream channel. |
| T/F cadIfDownChannelPrimaryCapable | 1.3.6.1.4.1.4998.1.1.15.2.1.1.38 | TruthValue | read-write | When a row's cadIfDownChannelPrimaryCapable column is set to true(1) then DOCSIS SYNC message generation is enabled on the downstream channel. Otherwise, DOCSIS SYNC message generation is disabled. |
| T/F cadIfDownSpectralInversion | 1.3.6.1.4.1.4998.1.1.15.2.1.1.39 | TruthValue | read-write | When a row's cadIfDownSpectralInversion column is set to true(1), then spectral inversion is enabled. Otherwise, spectral inversion is disabled. Note that spectral inversion is a video PHY parameter not used with DOCSIS channels; it is only used for channels of type VOD and video-replica. |
| cadDownChannelParams | 1.3.6.1.4.1.4998.1.1.15.2.2 | |||
| INT cadDownChannelMaxFrequency | 1.3.6.1.4.1.4998.1.1.15.2.2.1 | INTEGER | read-write | This object is used to configure the C4 CMTS to accept maximum downstream frequency limit that conform with the EuroDOCSIS specifications (starndard range 112 MHz to 858 MHz), (extended 85 MHz to 999MHz) or to the DOCSIS specifications (standard 91 to 867 MHz), (extended range 57 MHz to 999 MHz). Changes to downstream frequency and width are verified against this object to ensure the C4 CMTS does not exceed the downstream spectrum limits imposed by this object. Attempting to decrease the downstream frequency spectrum implied by this object will fail if at least a single downstream is configured outside of the range for the new value. It is recommended this object be set during initial system setup. |
| INT cadDownChannelMinFrequency | 1.3.6.1.4.1.4998.1.1.15.2.2.2 | INTEGER | read-write | This object is used to configure the C4 CMTS to accept minimum downstream frequency limit that conform with the EuroDOCSIS specifications (starndard range 112 MHz to 858 MHz), (extended 85 MHz to 999MHz) or to the DOCSIS specifications (standard 91 to 867 MHz), (extended range 57 MHz to 999 MHz). Changes to downstream frequency and width are verified against this object to ensure the C4 CMTS does not exceed the downstream spectrum limits imposed by this object. Attempting to increase the minimum downstream frequency limit implied by this object will fail if at least a single downstream is configured outside of the range for the new value. It is recommended this object be set during initial system setup. |
| T/F cadDownChannelAgcEnable | 1.3.6.1.4.1.4998.1.1.15.2.2.3 | TruthValue | read-write | Enable Automatic Gain Control on DCAMs. |
| T/F cadDownChannelOorRecoveryEnable | 1.3.6.1.4.1.4998.1.1.15.2.2.4 | TruthValue | read-write | True to enable toggling the Sequence Change Count for a DSID in response to a CM-STATUS sequence number Out-Of-Range message. |
| INT cadDsOfdmOcdDpdPlcInterval | 1.3.6.1.4.1.4998.1.1.15.2.2.5 | INTEGER | read-write | How often to send the OCD and DPD messages on a channel over the PLC. |
| INT cadDsOfdmDpdProfAInterval | 1.3.6.1.4.1.4998.1.1.15.2.2.6 | INTEGER | read-write | How often to send the DPD messages on a channel using profile A. |
| INT cadDownChannelLsredMinThresh | 1.3.6.1.4.1.4998.1.1.15.2.2.7 | INTEGER | read-write | This parameter defines the start of the downstream latency region where packets are randomly dropped. This value must be less than or equal to cadDownChannelLsredMaxThresh. |
| INT cadDownChannelLsredMaxThresh | 1.3.6.1.4.1.4998.1.1.15.2.2.8 | INTEGER | read-write | This parameter defines the end of the downstream latency region where packets are randomly dropped. This value must be greater than or equal to cadDownChannelLsredMinThresh. |
| INT cadDownChannelLsredMaxProb | 1.3.6.1.4.1.4998.1.1.15.2.2.9 | INTEGER | read-write | This parameter defines the drop probability of a packet when its downstream latency is equal to cadDownChannelLsredMaxThresh. The probability of dropping a packet varies linearly from 0% at a latency of cadDownChannelLsredMinThresh and the value of this parameter at cadDownChannelLsredMaxThresh. |
| T/F cadDownChannelVoiceShaping | 1.3.6.1.4.1.4998.1.1.15.2.2.10 | TruthValue | read-write | This parameter defines whether downstream voice packets should be shaped or not. When this this parameter is set to false, voice packets that do not conform to the policing parameters are dropped instead of being delayed. |
| cadIfDsOfdmPowerTable | 1.3.6.1.4.1.4998.1.1.15.2.3 | not-accessible | This status table contains the power parameters for a DS OFDM channel. | |
| cadIfDsOfdmPowerEntry | 1.3.6.1.4.1.4998.1.1.15.2.3.1 | not-accessible | An entry shows the power setting and measured power for one of the frequencies within an OFDM channel. | |
| NUM cadIfDsOfdmPowerIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.3.1.1 | InterfaceIndex | not-accessible | The ifIndex of this downstream OFDM channel. |
| I32 cadIfDsOfdmPowerFrequency | 1.3.6.1.4.1.4998.1.1.15.2.3.1.2 | Integer32 | not-accessible | A relative frequency within the OFDM channel for power control/status, in 6 MHz increments(i.e., legal values are 3, 9, 15, etc). |
| TEN cadIfDsOfdmPowerFineAdjustment | 1.3.6.1.4.1.4998.1.1.15.2.3.1.3 | TenthdBmV | read-write | The configured power for this OFDM channel frequency. This consists of the base RF port power per channel plus any configured tilt adjustment. |
| TEN cadIfDsOfdmPowerCurrLevel | 1.3.6.1.4.1.4998.1.1.15.2.3.1.4 | TenthdBmV | read-only | The latest downstream power level reported by the port for this frequency. |
| TEN cadIfDsOfdmPowerMinLevel | 1.3.6.1.4.1.4998.1.1.15.2.3.1.5 | TenthdBmV | read-only | The minimum downstream power level read on the port for this frequency. |
| TEN cadIfDsOfdmPowerMaxLevel | 1.3.6.1.4.1.4998.1.1.15.2.3.1.6 | TenthdBmV | read-only | The minimum downstream power level reported by the port for this frequency. |
| cadIfDsOfdmChlTable | 1.3.6.1.4.1.4998.1.1.15.2.5 | not-accessible | This table describes the attributes of downstream OFDM channels. | |
| cadIfDsOfdmChlEntry | 1.3.6.1.4.1.4998.1.1.15.2.5.1 | not-accessible | An entry provides a list of attributes for a single OFDM Downstream channel. An entry in this table exists for each ifEntry with an ifType of docsOfdmDownstream (277). | |
| NUM cadIfDsOfdmChlIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.5.1.1 | InterfaceIndex | not-accessible | The ifIndex of this OFDM downstream channel. |
| I32 cadIfDsOfdmChlLowFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.2 | Integer32 | read-write | The lowest subcarrier center frequency of the low guard band just below the encompassed spectrum. While this is the center frequency of a subcarrier, it is the low edge frequency of the OFDM channel. The center frequency of subcarrier zero is 6.4 MHz less than this value. Zero means not configured. Must be configured to go in-service. |
| I32 cadIfDsOfdmChlHighFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.3 | Integer32 | read-write | The highest subcarrier center frequency of the high guard band just above the encompassed spectrum. While this is the center frequency of a subcarrier, it is the high edge frequency of the OFDM channel. Zero means not configured. 24 MHz <= (HighFreqEdge - LowFreqEdge) <= 192 MHz. Must be configured to go in-service. |
| I32 cadIfDsOfdmChlPlcBlkLowSubcCentFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.4 | Integer32 | read-write | The center frequency of the lowest frequency subcarrier of the 6 MHz encompassed spectrum containing the PLC. Must be an integral number of Megahertz. Zero means not configured. Must be configured to go in-service. |
| I32 cadIfDsOfdmChlCyclicPrefix | 1.3.6.1.4.1.4998.1.1.15.2.5.1.5 | Integer32 | read-write | The cyclic-prefix, converted into samples using the sample rate of 204.8 Million samples/second. |
| I32 cadIfDsOfdmChlRolloffPeriod | 1.3.6.1.4.1.4998.1.1.15.2.5.1.6 | Integer32 | read-write | The roll-off period used in windowing, converted into samples using the sample rate of 204.8 Million samples/second. |
| I32 cadIfDsOfdmChlTimeIntlvrDepth | 1.3.6.1.4.1.4998.1.1.15.2.5.1.7 | Integer32 | read-write | The number of symbols in the time domain for interleaving. The range is 1..32 for 50 KHz subcarrier spacing, and 1..16 for 25 KHz spacing. A value of one means no time interleaving. |
| I32 cadIfDsOfdmChlSubcSpacing | 1.3.6.1.4.1.4998.1.1.15.2.5.1.8 | Integer32 | read-write | The subcarrier frequency width for this OFDM channel. |
| I32 cadIfDsOfdmChlContPilotScaleFactor | 1.3.6.1.4.1.4998.1.1.15.2.5.1.9 | Integer32 | read-write | The scale factor M used to calculate the total number of continuous pilots defined using the PLC. The number of continuous pilots also depends on the encompassed bandwidth. |
| I32 cadIfDsOfdmChlMaxRoundTripDelay | 1.3.6.1.4.1.4998.1.1.15.2.5.1.10 | Integer32 | read-write | Maximum round-trip propagation delay for cable plant in Microseconds. Should be configured for the furthest CM in all cable groups containing this DownChannel. Default of 800 Microseconds is approxiamately 50 miles between the CMTS and the furthest CM. |
| I32 cadIfDsOfdmChlPCNormAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.5.1.11 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by non-emergency telephony services. This is also the maximum amount of resources non-exclusively allocated to sessions of this type. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDsOfdmChlPCNormResUsage | 1.3.6.1.4.1.4998.1.1.15.2.5.1.12 | Integer32 | read-write | Minimum percentage of downstream resources that may be used by non-emergency telephony services. This is also the maximum amount of resources exclusively allocated to sessions of this type. If the value of this object is non-zero, then a portion of the downstream bandwidth will be set aside for normal telephony use only - reducing the bandwidth that is available for normal data. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDsOfdmChlPCEmerAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.5.1.13 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by emergency telephony services. The default is set from the globals in CadPCMibBase. |
| I32 cadIfDsOfdmChlPCEmerResUsage | 1.3.6.1.4.1.4998.1.1.15.2.5.1.14 | Integer32 | read-write | Minimum percentage of downstream resources that may be used by emergency telephony services. If the value of this object is non-zero, then a portion of the downstream bandwidth will be set aside for normal telephony use only - reducing the bandwidth that is available for normal data. The default is set from the globals in CadPCMIbBase. |
| I32 cadIfDsOfdmChlPCTotalAllowedUsage | 1.3.6.1.4.1.4998.1.1.15.2.5.1.15 | Integer32 | read-write | Maximum percentage of downstream resources that may be used by both normal and emergency telephony services. The default is set from the globals in CadPCMibBase. |
| T/F cadIfDsOfdmChlPCPreemptionAllowed | 1.3.6.1.4.1.4998.1.1.15.2.5.1.16 | TruthValue | read-write | Indicates whether the system will preempt another session for an emergency call. The default is set from the globals in CadPCMibBase. |
| TEN cadIfDsOfdmChlRfPortBasePower | 1.3.6.1.4.1.4998.1.1.15.2.5.1.17 | TenthdBmV | read-write | The CCAP operational transmit power. See the reference for recommended and required power levels for the equivalent total number of 6 MHz channels on the RF port. The default is the DRFI maximum for 48 6 MHz SC channels plus one 96 MHz OFDM channel equaling 16 equivalent channels, for a total of 64 equivalent 6 Mhz channels. |
| I32 cadIfDsOfdmChlSubcZeroCentFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.18 | Integer32 | read-only | The center frequency of subcarrier 0. This is 102.4 MHz less than (cadIfDsOfdmChlLowFreq + cadIfDsOfdmChlHighFreq)/2 if cadIfDsOfdmChlLowFreq is divisible by 250 KHz. Otherwise, it is 102.525 MHz less than (cadIfDsOfdmChlLowFreq + cadIfDsOfdmChlHighFreq)/2. |
| I32 cadIfDsOfdmChlLowActSubcCentFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.19 | Integer32 | read-only | The low center frequency of the lowest active subcarrier in the OFDM channel. The low edge of the encompassed spectrum is half a subcarrier less than this value. |
| I32 cadIfDsOfdmChlHighActSubcCentFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.20 | Integer32 | read-only | The high center frequency of the highest active subcarrier in the the OFDM channel. The high edge of the encompassed spectrum is half a subcarrier more than this value. |
| I32 cadIfDsOfdmChlPlcLowSubcCentFreq | 1.3.6.1.4.1.4998.1.1.15.2.5.1.21 | Integer32 | read-only | The center frequency of the lowest frequency subcarrier of the PLC itself. By definition, this is 2.8 MHz higher than cadIfDsOfdmChlPlcBlkLowSubcCentFreq (i.e., the PLC block is 6 MHz, and the 400 KHz PLC is centered in that block). |
| I32 cadIfDsOfdmChlNumActSubc | 1.3.6.1.4.1.4998.1.1.15.2.5.1.22 | Integer32 | read-only | The configured number of subcarriers based on the high and low center frequencies of the active subcarriers in the the OFDM channel. |
| cadIfDsOfdmChlDataTable | 1.3.6.1.4.1.4998.1.1.15.2.6 | not-accessible | This table describes the read-only attributes of downstream OFDM channels (frequency bands). | |
| cadIfDsOfdmChlDataEntry | 1.3.6.1.4.1.4998.1.1.15.2.6.1 | not-accessible | An entry provides a list of read-only attributes for a single OFDM downstream channel. An entry in this table exists for each ifEntry with an ifType of docsOfdmDownstream (277). | |
| I32 cadIfDsOfdmChlDataNumActSubcarriers | 1.3.6.1.4.1.4998.1.1.15.2.6.1.1 | Integer32 | read-only | The number of non-excluded subcarriers in the OFDM channel. 7600 is the maximum allowed for a 190 MHz of active Spectrum. 350 would be the worst case for 22 MHz of Active spectrum with 50 KHz subcarriers, with 20 percent exclusions. |
| I32 cadIfDsOfdmChlDataNumContPilots | 1.3.6.1.4.1.4998.1.1.15.2.6.1.2 | Integer32 | read-only | The total number of continuous pilots. The total number of of continuous pilots is the number defined by the PLC plus the 8 pre-defined ones positioned around the PLC. |
| cadDsOfdmProfileTable | 1.3.6.1.4.1.4998.1.1.15.2.8 | not-accessible | This table defines the profiles assigned to an OFDM channel. | |
| cadDsOfdmProfileEntry | 1.3.6.1.4.1.4998.1.1.15.2.8.1 | not-accessible | An entry defines one profile on one channel. | |
| NUM cadDsOfdmProfileIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.8.1.1 | InterfaceIndex | not-accessible | The ifIndex of the channel using this profile. |
| OFD cadDsOfdmProfileId | 1.3.6.1.4.1.4998.1.1.15.2.8.1.2 | OfdmProfileId | not-accessible | The ID of a profile plus one. |
| CER cadDsOfdmProfileDefBitload | 1.3.6.1.4.1.4998.1.1.15.2.8.1.3 | CerOfdmModType | read-create | The default bit-loading (modulation) for this profile. If cadDsOfdmProfileId is 256, only qpsk, qam16, and qam64 are legal. Otherwise, all but qpsk and qam0 are legal. |
| ROW cadDsOfdmProfileRowStatus | 1.3.6.1.4.1.4998.1.1.15.2.8.1.4 | RowStatus | read-create | The RowStatus for controlling entries in this table. |
| cadDsOfdmProfStatTable | 1.3.6.1.4.1.4998.1.1.15.2.9 | not-accessible | This table provides counts and the average bits per Hertz per OFDM channel per profile. | |
| cadDsOfdmProfStatEntry | 1.3.6.1.4.1.4998.1.1.15.2.9.1 | not-accessible | An entry provides the values for one profile on one channel. | |
| NUM cadDsOfdmProfStatIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.9.1.1 | InterfaceIndex | not-accessible | The ifIndex of this OFDM downstream channel. |
| OFD cadDsOfdmProfStatProfId | 1.3.6.1.4.1.4998.1.1.15.2.9.1.2 | OfdmProfileId | not-accessible | The profile number plus one of this profile on this channel. |
| U32 cadDsOfdmProfStatAvgBitsPerSubc | 1.3.6.1.4.1.4998.1.1.15.2.9.1.3 | Unsigned32 | read-only | The average number of bits per subcarrier times 100 across all active subcarriers on the channel, rounded to nearest hundredth. Continuous pilots and subcarriers in the PLC are not included in this calculation, even though they are active. NCP subcarriers are counted as if they could carry data, because it is too difficult to factor them out, given their variability. |
| CER cadDsOfdmProfStatReqMods | 1.3.6.1.4.1.4998.1.1.15.2.9.1.4 | CerOfdmModBitsType | read-only | The modulations used by this profile and any exceptions to this profile. |
| C64 cadDsOfdmProfStatEtherFrameBytes | 1.3.6.1.4.1.4998.1.1.15.2.9.1.5 | Counter64 | read-only | The count of Layer 2 Ethernet frame bytes that have been sent on this channel using this specific profile. |
| C64 cadDsOfdmProfStatTotalCodewords | 1.3.6.1.4.1.4998.1.1.15.2.9.1.6 | Counter64 | read-only | The number of codewords sent on this channel using this specific profile. |
| U32 cadDsOfdmProfStat30SecCwUtil | 1.3.6.1.4.1.4998.1.1.15.2.9.1.7 | Unsigned32 | read-only | The codeword utilization percentage of this profile on this channel. The utilization is measured over the last 30 seconds. |
| U32 cadDsOfdmProfStat30SecCwEff | 1.3.6.1.4.1.4998.1.1.15.2.9.1.8 | Unsigned32 | read-only | The Efficiency percentage of this profile on this channel over the last 30 seconds (i.e,. the average number of data bits per codeword used by this profile, divided by the size of a codeword). |
| cadDsOfdmProfExceptionTable | 1.3.6.1.4.1.4998.1.1.15.2.11 | not-accessible | This table defines exceptions to profiles on an OFDM channel. | |
| cadDsOfdmProfExceptionEntry | 1.3.6.1.4.1.4998.1.1.15.2.11.1 | not-accessible | An entry defines one profile exception. | |
| NUM cadDsOfdmProfExceptionIfIndex | 1.3.6.1.4.1.4998.1.1.15.2.11.1.1 | InterfaceIndex | not-accessible | The ifIndex of the channel using this profile. |
| OFD cadDsOfdmProfExceptionProfId | 1.3.6.1.4.1.4998.1.1.15.2.11.1.2 | OfdmProfileId | not-accessible | The Id of a profile plus one. |
| I32 cadDsOfdmProfExceptionLowFreq | 1.3.6.1.4.1.4998.1.1.15.2.11.1.3 | Integer32 | not-accessible | The low edge frequency of a frequency range being assigned a different bit-loading type from the default for the profile. |
| I32 cadDsOfdmProfExceptionHighFreq | 1.3.6.1.4.1.4998.1.1.15.2.11.1.4 | Integer32 | read-create | The high edge frequency of a frequency range being assigned a different bit-loading type from the default for the profile. |
| T/F cadDsOfdmProfExceptionSkip | 1.3.6.1.4.1.4998.1.1.15.2.11.1.5 | TruthValue | read-create | True if using different bit-loading for odd and even numbered subcarriers in this frequency range. False if all subcarriers in the range use the single bit-loading type given by cadDsOfdmProfExceptionMainBitload. |
| CER cadDsOfdmProfExceptionMainBitload | 1.3.6.1.4.1.4998.1.1.15.2.11.1.6 | CerOfdmModType | read-create | The main bit-loading (modulation) for this frequency range. If skip is true, this is the bit-loading for only the even numbered subcarriers. If false, it is for all subcarriers. |
| CER cadDsOfdmProfExceptionOddBitload | 1.3.6.1.4.1.4998.1.1.15.2.11.1.7 | CerOfdmModType | read-create | The bit-loading (modulation) for the odd numbered subcarriers when skip is true. Ignored if skip is false. |
| ROW cadDsOfdmProfExceptionRowStatus | 1.3.6.1.4.1.4998.1.1.15.2.11.1.8 | RowStatus | read-create | The RowStatus for controlling entries in this table. |
RFC description
ARRIS CMTS downstream channel configuration MIB for cable modem system RF channel management and OFDM profile control.
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