All MIBs › DOCS-IF31-MIB › docsIf31CmtsDsOfdmChanNcpModulation
docsIf31CmtsDsOfdmChanNcpModulation
Module: DOCS-IF31-MIB
OID (symbolic): DOCS-IF31-MIB::docsIf31CmtsDsOfdmChanNcpModulation
OID (numeric): 1.3.6.1.4.1.4491.2.1.28.1.19.1.19
Node type: OBJECT-TYPE
Type: DsOfdmModulationType
Access: read-only
Description: This attribute represents the modulation of all subcarriers in the NCP channel. Valid values are qpsk, qam16 and qam64.
What is docsIf31CmtsDsOfdmChanNcpModulation?
Reports the modulation scheme (QPSK, 16-QAM, or 64-QAM) used for all subcarriers carrying the NCP (Next Codeword Pointer) on this OFDM downstream channel. Since the NCP tells receivers where MAC frame codewords begin, a lower/more robust modulation here (e.g. QPSK) generally reflects a channel provisioned for a noisier plant, and admins can check this when troubleshooting why modems on a given channel are more or less resilient to signal degradation.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.28.1.19.1.19 snmpwalk -v2c -c public <target> DOCS-IF31-MIB::docsIf31CmtsDsOfdmChanNcpModulation
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.28.1.19.1.19.1 snmpget -v2c -c public <target> DOCS-IF31-MIB::docsIf31CmtsDsOfdmChanNcpModulation.1
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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 |
|---|---|---|
| 1.3.6.1.4.1.4491.2.1.28 | docsIf31Mib | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1 | docsIf31MibObjects | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1.19 | docsIf31CmtsDsOfdmChanTable | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1.19.1 | docsIf31CmtsDsOfdmChanEntry | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1.19.1.19 | docsIf31CmtsDsOfdmChanNcpModulation | DOCS-IF31-MIB |