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use upstream frequencies higher than 42 Mhz - CMTS C100G

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deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi

We have added nodes that support up to 85 Mhz, I have a C100G CMTS

Configure to test these frequencies on an upstream interface

interface upstream 10/2.0
frequency 80000000
channel-width 3200000

interface upstream 10/2.1
frequency 76000000
channel-width 3200000

interface upstream 10/2.2
frequency 72000000
channel-width 3200000

Interface upstream 10/2.3
frequency 68000000
channel-width 3200000

I have problems: Cable Modem do not go online

What do you recommend me to do, I would like to know if the Modem supports these frequencies higher than 42Mhz

I have tested with the SBG6580 and SBG6782-HH Cable Modem Models

Question:

something additional must be configured in the CMTS or in the docsis files

I am attentive to your help

regards

cmcaldas
modem file

I've found you have to add diplex change on the modem file as well as the docsis-mac

on the modem file
Diplexer band edge
Diplexer Upstream Upper Band Edge:Upstream Frequency Range up to 85 MHz (or 117 Mhz)

interface docsis-mac 6
description "Node_6"
no shutdown
no dhcp-authorization
initial-tech unicast-ranging
no early-authentication-encryption
upstream extended-frequency-range
no multicast-dsid-forward
tftp-enforce
no tftp-proxy
no cable privacy valid-period-check
ip bundle 1
upstream 1 interface upstream 10/10.0/0
upstream 2 interface upstream 10/10.1/0
upstream 3 interface upstream 10/10.2/0
upstream 4 interface upstream 10/10.3/0
upstream 5 interface ofdma 10/11.0
downstream 1 interface qam 1/5/0
downstream 2 interface qam 1/5/1
downstream 3 interface qam 1/5/2
downstream 4 interface qam 1/5/3
downstream 5 interface qam 1/5/4
downstream 6 interface qam 1/5/5
downstream 7 interface qam 1/5/6
downstream 8 interface qam 1/5/7
downstream 9 interface qam 1/5/8
downstream 10 interface qam 1/5/9
downstream 11 interface qam 1/5/10
downstream 12 interface qam 1/5/11
downstream 13 interface qam 1/5/12
downstream 14 interface qam 1/5/13
downstream 15 interface qam 1/5/14
downstream 16 interface qam 1/5/15
downstream 17 interface qam 1/5/16
downstream 18 interface qam 1/5/17
downstream 19 interface qam 1/5/18
downstream 20 interface qam 1/5/19
downstream 21 interface qam 1/5/20
downstream 22 interface qam 1/5/21
downstream 23 interface qam 1/5/22
downstream 24 interface qam 1/5/23
downstream 25 interface qam 1/5/24 secondary
downstream 26 interface qam 1/5/25 secondary
downstream 27 interface qam 1/5/26 secondary
downstream 28 interface qam 1/5/27 secondary
downstream 29 interface qam 1/5/28 secondary
downstream 30 interface qam 1/5/29 secondary
downstream 31 interface qam 1/5/30 secondary
downstream 32 interface qam 1/5/31 secondary
downstream 33 interface shared-ofdm 1/1 secondary
router-advertisement enable
router-advertisement managed-flag true
router-advertisement other-config-flag true
cable cm-status report event-list 1,2,3,4,5,6,7,8,9,10,11,16,17,18,20,21,22,23,24,25,26,27
cable diplexer upstream-upper-band-edge 2 <<<<<<<<<<<

deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi

Please help me indicating which lines to add in the docsis file

Reviewing I found these:

DiplexerBandEdge
{
DiplexerUpstreamUpperBandEdge 2;

}

Attached docsis file that I currently use

In the cmts configuration I understand that this line should only be added in the interface docsis-mac

cable diplexer upstream-upper-band-edge 2

I want to know if these cable modem models (SBG6580, CISCO DPC3825, SBG6782-HH) support frequencies higher than 42Mhz

I am attentive to comments and help

File attachments: 
cmcaldas
file attached

the modem file is attached for 85Mhz upstream diplex. as for the modem if they support it, you'll have to try on them to confirm.
I've not tried on those modems. test it and let the group know please

File attachments: 
deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi

I added this two lines in the configuration of the interface docsis-mac in the CMTS C100G

interface docsis-mac 1
upstream extended-frequency-range
cable diplexer upstream-upper-band-edge 2

I added these lines in the docsis file for the cable modem:

Diplexer band edge
Diplexer Upstream Upper Band Edge:Upstream Frequency Range up to 85 MHz

I attach the docsis file that I use in the test

doing these configurations does not work, the modems do not go online

How can I confirm that the Modem supports frequencies higher than 42Mhz, the modems are docsis 3.0

Attached the Configuration in the CMTS of: interface docsis-mac and interface upstream 4/0

Please help me to solve this

cmcaldas
went back and checked a few things

so the oid for the diplex isn't the same for all vendors. original sent was the default, but Arris uses a different string as well does Netgear. myself, I'm not a fan a Arris and between the two, prefer the Netgear. key is having updated firmware.
attached the snmp info for Netgear. won't work for Arris, it'll take a couple of days to find the arris snmp string to change the diplex to 85Mhz

File attachments: 
deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi
reviewing the data sheet of these cable modem models:

Contains this information:

Model: SBG6782-HH
Frequency Range
5–42 MHz (edge to edge)

Model: SBG6582
Frequency Range
DOCSIS 5-42 MHz (edge to edge)

Model: CISCO DPC3825
Operating Frequency Range
5 to 42 MHz, 5 to 65 MHz or 5 to 85 MHz

Operating Frequency Range
5 to 42 MHz, 5 to 65 MHz or 5 to 85 MHz

With this information I want to confirm if I can use the CISCO DPC3825 with frequencies higher than 42Mhz
What line should I add to the docsis file to make it work with this model, I did tests with the DPC3525 model but it did not work for me

I attach the data sheet of these cable modem models

please help me

deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi

I have a CMTS C100G casa systems with these two types of upstream modules:

UPS_16x8 Running (16 ports, 8 phy chans/port, 2 log chans/phy chan,scdma map 00)

UPS_16x8 Running (32 ports, 4 phy chans/port, 2 log chans/phy chan,scdma map 00)

Module 11 UPS_16x8 Running (16 ports, 8 phy chans/port, 2 log chans/phy chan,scdma map 00)
Docsis channel: 64
Major rev 5, Minor rev 9
Serial_No: US15CJ3S0376 CFE version 12.9.15
Uptime: 11 d, 4 h, 40 m, 16 s

Module 12 UPS_16x8 Running (32 ports, 4 phy chans/port, 2 log chans/phy chan,scdma map 00)
Docsis channel: 72
Major rev 5, Minor rev 8
Serial_No: US15CG9S0875 CFE version 12.9.15
Uptime: 11 d, 4 h, 39 m, 27 s

Please confirm if these modules support frequencies higher than 42 Mhz, between 5 to 85Mhz

Please help me

kwesibrunee
yes those modules support 5

yes those modules support 5-85 MHz.

With those modems Cisco EPC, you will need to apply the vendor specific mib that switches the modem from 5-42 MHz to 5-85 MHz. This will need to be added to the modem config. Because it is applied from config you need an upstream between 5-42 MHz for the modem to log on to in the first place.

Most people use ATDMA from 5-42 MHz and OFDMA between 42-85MHz.

deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi kwesibrunee

Thank you very much for your help

I am new to this topic of using frequencies above 42Mhz

In the docsis file add these Lines

Diplexer band edge
Diplexer Upstream Upper Band Edge:Upstream Frequency Range up to 85 MHz

This is the Configuration of interface docsis-mac in the CMTS where I add these two lines
upstream extended-frequency-range
cable diplexer upstream-upper-band-edge 2

I want to know if I need something different of apply the vendor specific mib that switches the modem from 5-42 MHz to 5-85 MHz

Please help me find the necessary oid

This is the configuration that I am using in interface docsis-mac

interface docsis-mac 1
no shutdown
sync-interval 10
insertion-interval 20
ucd-interval 1000
no dhcp-authorization
invited-ranging-attempts 16
initial-tech broadcast-ranging
initial-tech ofdma broadcast-ranging
no energy management
no battery backup
ip-provisioning-mode ipv4-only
no early-authentication-encryption
upstream extended-frequency-range
cm-status event report
no multicast-dsid-forward
downstream channel bonding
upstream channel bonding
no tftp-enforce
no tftp-enforce src-interface
no tftp-proxy
no cable privacy valid-period-check
no upstream drop classifier
no send udc rules
no dhcp-giaddr-primary
no dhcpv6-link-address-primary
no dhcp-insert
mdd interval 2000
sid-cluster max-requests 0
sid-cluster max-outstanding-bytes 0
sid-cluster max-total-bytes 0
sid-cluster max-time 0
max sid-cluster per-service-flow 2
ip bundle 1
upstream 1 interface upstream 4/0.0/0
upstream 2 interface upstream 4/0.1/0
upstream 3 interface upstream 4/0.2/0
upstream 4 interface upstream 4/0.3/0
upstream 5 interface upstream 4/1.0/0
upstream 6 interface upstream 4/1.1/0
upstream 7 interface upstream 4/1.2/0
upstream 8 interface upstream 4/1.3/0
downstream 1 interface qam 0/0/0
downstream 2 interface qam 0/0/1
downstream 3 interface qam 0/0/2
downstream 4 interface qam 0/0/3
downstream 5 interface qam 0/0/4
downstream 6 interface qam 0/0/5
downstream 7 interface qam 0/0/6
downstream 8 interface qam 0/0/7
downstream 9 interface qam 0/0/8
downstream 10 interface qam 0/0/9
downstream 11 interface qam 0/0/10
downstream 12 interface qam 0/0/11
downstream 13 interface qam 0/0/12
downstream 14 interface qam 0/0/13
downstream 15 interface qam 0/0/14
downstream 16 interface qam 0/0/15
downstream 17 interface qam 0/0/16
downstream 18 interface qam 0/0/17
downstream 19 interface qam 0/0/18
downstream 20 interface qam 0/0/19
downstream 21 interface qam 0/0/20
downstream 22 interface qam 0/0/21
downstream 23 interface qam 0/0/22
mgmd ipv4 query-interval 125
mgmd ipv4 version 3
mgmd ipv4 max-query-response-time 100
mgmd ipv4 proxy-interface gige 6/0
mgmd ipv4 robustness 2
mgmd ipv4 last-member-query-interval 10
mgmd ipv4 shutdown
mgmd ipv6 query-interval 125
mgmd ipv6 version 2
mgmd ipv6 max-query-response-time 100
mgmd ipv6 proxy-interface gige 6/0
mgmd ipv6 robustness 2
mgmd ipv6 last-member-query-interval 10
mgmd ipv6 shutdown
privacy kek life-time 604800
privacy tek life-time 43200
no cable cm-status report event-list 1,2,3,4,5,6,7,8,9,10,11,16,17,18,20,21,22,23,24,25,26,27
cable cm-status event 1 max-timer 2.00 max-number 8
cable cm-status event 2 max-timer 2.00 max-number 8
cable cm-status event 3 max-timer 2.00 max-number 8
cable cm-status event 4 max-timer 2.00 max-number 8
cable cm-status event 5 max-timer 2.00 max-number 8
cable cm-status event 6 max-timer 2.00 max-number 8
cable cm-status event 7 max-timer 2.00 max-number 8
cable cm-status event 8 max-timer 2.00 max-number 8
cable cm-status event 9 max-timer 2.00 max-number 8
cable cm-status event 10 max-timer 2.00 max-number 8
cable cm-status event 11 max-timer 2.00 max-number 8
cable cm-status event 12 max-timer 2.00 max-number 8
cable cm-status event 13 max-timer 2.00 max-number 8
cable cm-status event 14 max-timer 2.00 max-number 8
cable cm-status event 15 max-timer 2.00 max-number 8
cable cm-status event 16 max-timer 2.00 max-number 8
cable cm-status event 17 max-timer 2.00 max-number 8
cable cm-status event 18 max-timer 2.00 max-number 8
cable cm-status event 19 max-timer 2.00 max-number 8
cable cm-status event 20 max-timer 2.00 max-number 8
cable cm-status event 21 max-timer 2.00 max-number 8
cable cm-status event 22 max-timer 2.00 max-number 8
cable cm-status event 23 max-timer 2.00 max-number 8
cable cm-status event 24 max-timer 2.00 max-number 8
cable cm-status event 25 max-timer 2.00 max-number 8
cable cm-status event 26 max-timer 2.00 max-number 8
cable cm-status event 27 max-timer 2.00 max-number 8
no cm trap
cm trap interval 600
cable diplexer upstream-upper-band-edge 2

regards

deividfiguer
use upstream frequencies higher than 42 Mhz - CMTS C100G

Hi

Any help to find the vendor specific mib that switches the modem from 5-42 MHz to 5-85 MHz, Cable Modem CISCO DPC3825

regards

kwesibrunee
A little quick research, and

A little quick research, and it looks like different versions of DPC3825 were made for different diplexer combinations, but it does not look like they are software switchable.

you can use this readonly oid to see what kind you have
Name: saHwDescrDiplexer
Type: OBJECT-TYPE
OID: 1.3.6.1.4.1.1429.78.4.1.7
Full path: iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).sa(1429).saVoip(78).saHardware(4).saHwDescr(1).saHwDescrDiplexer(7)
Module: SA-HARDWARE-MIB

Parent: saHwDescr
Prev sibling: saHwDescrPowerSupply
Next sibling: saHwDescrMainProcessor

Numerical syntax: Integer (32 bit)
Base syntax: INTEGER
Composed syntax: INTEGER
Status: current
Max access: read-only [r--]
Value list: 1: none(0)
2: north-america-5-42(1)
3: europe-5-65(2)
4: japan(3)
5: korea(4)
6: north-america-85-108(5)
7: europe-5-85(6)

or you can use this data sheet to look up the part number and see what diplexer it came with.
https://www.multicominc.com/wp-content/uploads/Cisco-%E2%80%93-DPC3825.pdf

looks like part # 4039640 is your closest bet but it is 5-65 MHz.

It is possible they made 5-85MHz and that it is switchable, but it does not seem to be via SNMP, perhaps there is different firmware builds.

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