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Chatter about DOCSIS, provisioning, networks, and CMTS gear.

Multiplexing two downstreams

Forums: 

Hi,

I am using DOCSIS 1.0. .Since downstream modulation is 256QAM.
This way I can get Max 37 mbps throughput.Now i have added new downstream card with New downstream frequency (different from previous one).Now can i multiplex both the downstream and feed to single transmitter?

cmts laboratory environment

Forums: 

Hi everyone,

i would like to know if you have any idea about how to "build" kind of simple CMTS environment for using in laboratory. something
like a card (ethernet -> coax? pci? usb?)... do you know if have any product like that?

because in my project, i need to provide internet access for cable modem like a SVG1202[1]

DOCSIS packet classifier options

Forums: 

Hi,

Did some body already "play" with the DOCSIS options 24 with 22 and 25 with 23?

I try and try to fix somes priorisation and I got many problem to tweak the options and finished by having 3 definitions:

Problem with epc2425

Forums: 

Hi,

i have problem with config file on epc2425.

SnmpMibObject saRgDot11BssSecurityMode.32 Integer 7; /* wpaWpa2Psk */
SnmpMibObject saRgDot11WpaAlgorithm.32 Integer 2; /* tkipPlusAes */
SnmpMibObject saRgDot11WpaPreSharedKey.32 String "qwerty1234567890" ;
SnmpMibObject saRgDot11ApplySettings.0 Integer 1; /* true */

If i set this mibs in config file to upload to epc2425 - modem don't change this part. But if i gave it by snmpset:

Example of CM Reset

Forums: 

I am using a linux box to reset some promlematic modems using http://www.net-snmp.org/wiki/index.php/TUT:snmpset but i keep getting need value when i use the docsisdevresetnow. Is there anyone on the forum that has an e?amle for me to review.?

Help me Understand This Cfg File

Forums: 

Hello, The file is from Arris modem.

Just wanted to know about the Download and Upload Value and Info about this file and how can i change it to the bigger or lower value.
[code]

How to Prohibit Static Address Assignments on CPE

Forums: 

I reserve a small number of addresses in each of my DHCP public subnet pools for static assignments to businesses, etc. How do I prohibit a user from hijacking one of these unused addresses and simply plugging it into their setup? I presume it's a very simple class definition/designation and then applied to the host entry?

Could also use some help with a migration path to a third uBR and D2 from our humble little D1 setup using a pair of uBR's currently. D3 won't be in the cards for me until next year, so I need to make do with what I have for now.

Arris C3 fan question

Forums: 

Hello All,

I have some Arris C3's in some pretty remote locataions and need to know if the fans are dying. I've found this:

SNR Question.

Forums: 

I have a node that has a SNR issue. The SNR never peaks 26dB but always holds steady at 25-26dB while my other nodes hold 34-36dB. We use all SA/Cisco Gainmaker 870 gear. Checking the Port codeword errors and corrects it is our lowest error rate % port "Peaks 1.04% correct / 0.01% uncorrect" and thats only for a matter of a few minutes. This strikes me odd, so we hooked up our meter to the return and you couldn't ask for a more ingress clear return. The entire span from 5-55Mhz looked like this......

(See Attached SNR-spec Picture)

Cacti graphing cable interfaces to include wideband usage

Forums: 

I just deployed a new Cisco 7225VXR D3 enabled CMTS to a new market(no existing service). We've only deployed D3 modems so all are registered wideband. Now we outsource our "CPE monitoring" to an outside company. They present us with nice red light/green light of SNR, utilization, etc.. But I have my own internal Cacti server that will graph the same data, just not as easy on the eyeballs as red=bad and green=good. Now, when I use Cacti to build graphs one would assume that each cable 3/0*(example). would include Integrated Cable 3/0:0-3 AND Wideband3/0:0.

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