All MIBs › DOCS-DRF-MIB › docsDrfDownstreamPhyDependencies
docsDrfDownstreamPhyDependencies
Module: DOCS-DRF-MIB
OID (symbolic): DOCS-DRF-MIB::docsDrfDownstreamPhyDependencies
OID (numeric): 1.3.6.1.4.1.4491.2.1.23.1.2.1.1
Node type: OBJECT-TYPE
Type: Bits
Access: read-only
Description: The summary of the Downstream Interface dependencies based on the constraints of docsDrfGroupDependencyEntry. A BIT position set to '1' indicates the PHY parameter belongs to a dependency group. A BIT position set to '0', indicates the PHY parameter does not belong to a dependency group.
For Interfaces configured via DEPI this information is reflected in the DEPI session as DEPI TSID group dependencies.
If this object value is the zero-length string, it indicates this interface is configurable via DEPI but no session is currently active.
What is docsDrfDownstreamPhyDependencies?
This BITS value on a DOCSIS M-CMTS downstream QAM channel interface flags which PHY parameters (frequency, bandwidth, power, modulation, interleaver, J.83 Annex, symbol rate, mute) are shared with other channels in a dependency group. A cable operator or NMS checks this before changing one QAM channel's settings, since a bit set to 1 means altering that parameter on this channel can silently change it on the other channels in the same DEPI TSID group. For example, if the modulation(3) and j83Annex(5) bits are both set, changing modulation on this channel will also change modulation on every other QAM channel in its dependency group.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.23.1.2.1.1 snmpwalk -v2c -c public <target> DOCS-DRF-MIB::docsDrfDownstreamPhyDependencies
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.23.1.2.1.1.1 snmpget -v2c -c public <target> DOCS-DRF-MIB::docsDrfDownstreamPhyDependencies.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::docsDrfDownstreamPhyDependencies 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 OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.4491 | cableLabs | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2 | clabProject | CLAB-DEF-MIB |
| 1.3.6.1.4.1.4491.2.1 | clabProjDocsis | CLAB-DEF-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.4491.2.1.23 | docsDrfMib | DOCS-DRF-MIB |
| 1.3.6.1.4.1.4491.2.1.23.1 | docsDrfObjects | DOCS-DRF-MIB |
| 1.3.6.1.4.1.4491.2.1.23.1.2 | docsDrfDownstreamTable | DOCS-DRF-MIB |
| 1.3.6.1.4.1.4491.2.1.23.1.2.1 | docsDrfDownstreamEntry | DOCS-DRF-MIB |
| 1.3.6.1.4.1.4491.2.1.23.1.2.1.1 | docsDrfDownstreamPhyDependencies | DOCS-DRF-MIB |