| OID | 1.3.6.1.4.1.9.9.114.1.3.1.1.23 |
| Module | CISCO-CABLE-SPECTRUM-MIB (CISCO) |
| Nom | ccsUpSpecMgmtCriteria |
| Acces | readonly |
| Status | current |
| Description | Defines the criteria that trigger a change in
frequency hopping, modulation or channel width.
Depending on the type of linecards, the criteria
are slightly different:
For the linecards that have no Hardware
Based Spectrum Management capability like
the uBR-MC1xC, change in modulation or frequency
occurs in the following criteria:
1) Change from modulation profile 1 to
modulation profile 2 would occur when CMTS
detects the SNR that goes below the
threshold and either corr FEC or uncorr FEC
is above the threshold. In this case,
snrBelowThres and either corrFecAboveThres or
uncorrFecAboveThres bits will get set.
2) Change from modulation profile 2 to
modulation profile 1 would occur when CMTS
detects the SNR goes above the threshold+3
and both corr FEC and uncorr FEC are
below the threshold. In this case,
snrAboveThres and corrFecBelowThres
and uncorrFecBelowThres bits will get set.
3) Change in frequency or frequency hopping would
occur when CMTS detects no active modem on the link.
In this case, noActiveModem bit will get
set accordingly.
For the linecards that have the Hardware Based
Spectrum Management capability, change in
frequency, modulation or channel width occurs
in the following criteria:
1) when CMTS detects the SNR or CNR goes below the
threshold and either corr FEC or uncorr FEC is
above the threshold. In this case,
either snrBelowThres or cnrBelowThres and
either corrFecAboveThres or uncorrFecAboveThres
bits will get set.
2) when CMTS detects the SNR or CNR goes above the
threshold + 3 and both corr FEC and uncorr FEC are
below the threshold. In this case,
either snrAboveThres or cnrAboveThres and both
corrFecBelowThres and uncorrFecBelowThres bits
will get set.
3) when CMTS detects no active modem on the link or
uncorr FEC is above ccsUpSpecMgmtFecUnCorrectThres2.
In this case noActiveModem or
uncorrFecAboveSecondThres bit will get set
accordingly.
Note: The order of frequency, modulation or channel
width changes for the advanced spectrum management
linecards will be determined based on the selection of
the ccsUpSpecMgmtHopPriority. |
| Syntaxe | Bits (0-snrBelowThres, 1-cnrBelowThres, 2-corrFecAboveThres, 3-uncorrFecAboveThres, 4-snrAboveThres, 5-cnrAboveThres, 6-corrFecBelowThres, 7-uncorrFecBelowThres, 8-noActiveModem, 9-uncorrFecAboveSecondThres, 10-others) |