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Cisco Broadband Cable Command Reference Guide

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cable upstream threshold<br />

<strong>Command</strong> History<br />

2-248<br />

<strong>Cisco</strong> <strong>Broadband</strong> <strong>Cable</strong> <strong>Command</strong> <strong>Reference</strong> <strong>Guide</strong><br />

Chapter 2 <strong>Cisco</strong> <strong>Cable</strong> Modem Termination System <strong>Command</strong>s<br />

Usage <strong>Guide</strong>lines Separate CNR thresholds are assigned to the primary and secondary modulation profiles. Both profiles,<br />

however, are assigned the same correctable and uncorrectable FEC values.<br />

Note The uncorrectable FEC error count includes packets that have header checksum errors and “no unique<br />

word detected” errors.<br />

Examples The following example shows upstream 5 configured with the CNR threshold for the primary modulation<br />

profile set to 20 dB, the CNR threshold for the secondary modulation profile set to 10 dB, the correctable<br />

FEC error rate set to 5 percent of total packets received on the upstream, and the uncorrectable FEC error<br />

rate set to 1 percent of total packets received on the upstream:<br />

Related <strong>Command</strong>s<br />

Release Modification<br />

12.1(7)CX1 This command was introduced for <strong>Cisco</strong> CMTS routers using the<br />

<strong>Cisco</strong> uBR-MC16S cable interface line card.<br />

12.2(8)BC2 Support was added for the <strong>Cisco</strong> uBR10012 router and the<br />

<strong>Cisco</strong> uBR-LCP2-MC16S cable interface line card. Also, the ranges<br />

and defaults for the correctable and uncorrectable FEC error<br />

thresholds were changed.<br />

Router(config)# interface cable 3/0<br />

Router(config-if)# cable upstream 5 threshold cnr-profile1 20 cnr-profile2 10 corr-fec 5<br />

uncorr-fec 1<br />

Router(config-if)#<br />

<strong>Command</strong> Description<br />

cable modulation-profile Creates a cable modulation profile.<br />

cable upstream<br />

Determines the order of the corrective actions to be taken when ingress<br />

hop-priority<br />

noise exceeds the allowable value for an upstream.<br />

cable upstream<br />

Configures an upstream for one modulation profile (static profile) or two<br />

modulation-profile modulation profiles (Dynamic Upstream Modulation).<br />

show cable hop Displays the current hop period and threshold for an upstream, along with<br />

other statistics.<br />

show cable<br />

modulation-profile<br />

Displays the cable modulation profiles that have been created.<br />

OL-1581-05

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