With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
xdsl2LConfProfRaDsNrmDs
xdsl2 L Config Prof Ra Ds Nrm Ds
1.3.6.1.4.1.2011.2.25.251.1.5.1.2.1.12
The Downstream Down-Shift Noise Margin value, to be used when xdsl2LConfProfRaModeDs is set to 'dynamicRa'. If the downstream noise margin is below this value and stays below that value, for more than the time specified by the xdsl2LConfProfRaDsTimeDs, the xTU-R shall attempt to decrease the downstream net data rate. The Downstream Down-Shift Noise Margin ranges from 0 to 310 units of 0.1 dB (physical values are 0 to 31 dB).
Back to VDSL2-LINE-MIB MIB page.
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