All MIBs › DOCS-IF31-MIB › docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue
docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue
Module: DOCS-IF31-MIB
OID (symbolic): DOCS-IF31-MIB::docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue
OID (numeric): 1.3.6.1.4.1.4491.2.1.28.1.4.1.5
Node type: OBJECT-TYPE
Type: HundredthdB
Access: read-only
Description: This attribute is the RxMER value corresponding to the specified docsIf31CmtsCmUsOfdmaChannelRxMerThreshold percentile value. The CCAP sorts the subcarriers in ascending order of RxMER, resulting in a post-sorting subcarrier index ranging from 1 to the number of active subcarriers. If the percentile value corresponds to a non- integer post-sorting subcarrier index, the post-sorting index is truncated (floor function is applied); that is, the post-sorting index is selected which is the greatest integer less than or equal to the corresponding percentile value. For example, if there are 3677 active subcarriers and the 2nd percentile is specified, the CCAP computes floor(3677*0.02) = 73. That is, the RxMER value of the 73rd subcarrier in the sorted list is associated with the 2nd percentile. This is displayed in hundredth of a dB, but is only accurate to a quarter dB.
What is docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue?
Reports, in hundredths of a dB, the RxMER value corresponding to the configured percentile in docsIf31CmtsCmUsOfdmaChannelRxMerThreshold -- e.g. with the default 2nd-percentile setting and 3677 active subcarriers, this is the RxMER of the 73rd-worst subcarrier after sorting. Admins use this alongside the mean/std-dev RxMER to spot channels where a small subset of subcarriers is dragging down performance, which often points to specific-frequency ingress or micro-reflections.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.28.1.4.1.5 snmpwalk -v2c -c public <target> DOCS-IF31-MIB::docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.4491.2.1.28.1.4.1.5.1 snmpget -v2c -c public <target> DOCS-IF31-MIB::docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue.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 |
| 1.3.6.1.4.1.4491.2.1.28.1.4 | docsIf31CmtsCmUsOfdmaChannelStatusTable | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1.4.1 | docsIf31CmtsCmUsOfdmaChannelStatusEntry | DOCS-IF31-MIB |
| 1.3.6.1.4.1.4491.2.1.28.1.4.1.5 | docsIf31CmtsCmUsOfdmaChannelThresholdRxMerValue | DOCS-IF31-MIB |