DOCS-DRF-MIB :: docsDrfDownstreamCapabFrequency

MIB Reference — IPNetwork Monitor · Updated September 21, 2026

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docsDrfDownstreamCapabFrequency

Module: DOCS-DRF-MIB

OID (symbolic): DOCS-DRF-MIB::docsDrfDownstreamCapabFrequency

OID (numeric): 1.3.6.1.4.1.4491.2.1.23.1.3.1.1

Node type: OBJECT-TYPE

Type: Bits

Access: read-only

Description: The QAM channel frequency capabilities. 'qamDependency' BIT set to '1' indicates the QAM channel frequency value has dependencies with other QAM channels and an entry that includes this QAM channel is in in docsDrfGroupDependencyTable for the PHY parameter 'frequency'.

'adjacentChannel' BIT set to '1' indicates the QAM channel frequencies in the dependency group (DEPI TSID group) are adjacent and constrained in a frequency range based on the number of QAM channels in the dependency group.

'adjacentChannelOrder' BIT set to '1' indicates the QAM channel frequency adjacency is based in the QAM channel sequence like entPhysicalParentRelPos in EntPhysicalTable or other vendor sequence.

e.g., a dependency group of four QAM channels with 'adjacentChannelOrder' BIT set to '1': The 4th QAM channel in the sequence gets a frequency assignment f + 1*bandwidth when the frequency value of the 3rd QAM channel in the sequence is set to f. Similarly the 1st QAM channel in the sequence gets a frequency assignment of f - 2*bandwidth and the 2nd QAM channels gets a frequency of f -1*bandwidth.

'adjacentChannel' 'adjacentChannelOrder' BITs may be set to '1' when a dependency group includes the QAM channel of this M-CMTS Downstream interface and the value of the object docsDrfGroupDependencyType is docsDrfPhyParamAdjacentValues.

'adjacentChannel' BIT may be set to '1' if 'qamDependency' BIT is set to '1'. The same way, 'adjacentChannelOrder' BIT may be set to '1' and implies 'adjacentChannel' BIT is set to '1'.

What is docsDrfDownstreamCapabFrequency?

This BITS value reports the QAM channel's frequency-related capabilities: whether frequency has dependencies with other channels (qamDependency), whether dependent channels must sit at adjacent frequencies (adjacentChannel), and whether that adjacency follows a fixed sequence order (adjacentChannelOrder). An operator planning downstream frequency plans on an M-CMTS uses this to know whether retuning one QAM channel will force adjacent channels in the same dependency group to shift too. For instance, with adjacentChannelOrder set, moving the 3rd channel in a 4-channel group to frequency f causes the 4th channel to become f + 1*bandwidth automatically.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.23.1.3.1.1
snmpwalk -v2c -c public <target> DOCS-DRF-MIB::docsDrfDownstreamCapabFrequency

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.23.1.3.1.1.1
snmpget -v2c -c public <target> DOCS-DRF-MIB::docsDrfDownstreamCapabFrequency.1

SNMPv3 example:

snmpget -v3 -l authPriv -u snmpv3-user -a SHA -A "AuthPassword1" -x AES -X "PrivPassword1" <target> docsDrfDownstreamCapabFrequency.1

Start monitoring CMTS/cable headend edge device (Downstream RF Interface, vendor-neutral CableLabs standard) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the DOCS-DRF-MIB::docsDrfDownstreamCapabFrequency OID value, configure state conditions and alerts, and monitor any CMTS/cable headend edge device (Downstream RF Interface, vendor-neutral CableLabs standard) from a single console.

OID Breakdown

Upper-level ancestors (9 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.4491cableLabsCLAB-DEF-MIB
1.3.6.1.4.1.4491.2clabProjectCLAB-DEF-MIB
1.3.6.1.4.1.4491.2.1clabProjDocsisCLAB-DEF-MIB
Numeric OIDNameModule
1.3.6.1.4.1.4491.2.1.23docsDrfMibDOCS-DRF-MIB
1.3.6.1.4.1.4491.2.1.23.1docsDrfObjectsDOCS-DRF-MIB
1.3.6.1.4.1.4491.2.1.23.1.3docsDrfDownstreamCapabilitiesTableDOCS-DRF-MIB
1.3.6.1.4.1.4491.2.1.23.1.3.1docsDrfDownstreamCapabilitiesEntryDOCS-DRF-MIB
1.3.6.1.4.1.4491.2.1.23.1.3.1.1docsDrfDownstreamCapabFrequencyDOCS-DRF-MIB