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Configuration for 120mbps or upper

ali.ashoury
Beginner
Beginner

hello everyone 

I have CMTS cisco uBR7246VXR (UBR7200-NPE-G1)

and now it works fine 

but the Downstream is 24mbps and upstream 1.4mbps 

I have to configure this CMTS that able to test the modem TC4300 Docsis 3.0 for service 120mbps / 20mbps 

could you please let me know witch parameters have to change for this speed

you can find on the attached Text file Show run and show version of my CMTS

yours truly 

1 Reply 1

keithsauer507
Contributor
Contributor

Interfaces cable6/0 and  6/1 are both running 64qam.  Only two bonded channels down at 64 qam, the most you would get is maybe 54mbps down.  You won't get anywhere close to 120.  You need more downstream channels or better yet move them to 256qam.

Your upstream's are only 1.6 Mhz wide.  That's very small.  Have you tried 3.2 or  6.4 Mhz wide upstreams?  A good mix would be two 3.2 16 QAM and two 6.4 64 QAM upstreams and at least 4 256 QAM downstream.  4 256QAM downstream gets you closer to 152 Mbps capacity.   The more frequency you can spare the better.  See if your plant can support higher order modulations.

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