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Only 1 downstream channels: My modem supports at min 4

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derytelecom
Only 1 downstream channels: My modem supports at min 4

Hi,

We have several 4 channel Docisis 3.0 modem who are not able to bond on the 4 channel
any idea ?

thanks
=====================================================

#sh cable modem cable 5/1/0 wideband registered-traditional-docsis
exemple ( I have many modems like that)
0025.f257.4029 C5/1/0/U2 online 54 0 1 / N/A
001d.cd89.0d72 C5/1/0/U1 online 375 0 1 / N/A
e483.9975.3422 C5/1/0/U3 online 307 0 1 / N/A
001d.cd38.5688 C5/1/0/U2 online 663 0 1 / N/A

===========================
freq: 579 to 693Mhz
interface Cable5/1/0
downstream Modular-Cable 5/1/0 rf-channel 0-19 upstream 0-3
===========================

sh cable mac-domain cable 5/1/0 rcc
RCC-ID RCP RCs MD-DS-SG CMs WB/RCC-TMPL
1 00 00 00 00 00 8 0 67 WB (Wi5/1/0:0)
2 00 00 00 00 00 8 0 39 WB (Wi5/1/0:1)
3 00 00 00 00 00 4 0 2 WB (Wi5/1/0:2)
4 00 00 00 00 00 8 0 33 WB (Wi5/1/0:3)
5 00 00 00 00 00 8 0 36 WB (Wi5/1/0:4)
6 00 00 00 00 00 8 0 66 WB (Wi5/1/0:5)

==========================

cable fiber-node 55
downstream Modular-Cable 5/1/0 rf-channel 0-19
upstream Cable 5/1 connector 0-1

========================
interface Wideband-Cable5/1/0:0
description group 8x8-1
load-interval 30
cable bundle 1
cable rf-channel 0 bandwidth-percent 1
cable rf-channel 1 bandwidth-percent 1
cable rf-channel 2 bandwidth-percent 1
cable rf-channel 3 bandwidth-percent 1
cable rf-channel 4 bandwidth-percent 1
cable rf-channel 5 bandwidth-percent 1
cable rf-channel 6 bandwidth-percent 1
cable rf-channel 7 bandwidth-percent 1
!
interface Wideband-Cable5/1/0:1
description group 8x8-2
load-interval 30
cable bundle 1
cable rf-channel 8 bandwidth-percent 1
cable rf-channel 9 bandwidth-percent 1
cable rf-channel 10 bandwidth-percent 1
cable rf-channel 11 bandwidth-percent 1
cable rf-channel 12 bandwidth-percent 1
cable rf-channel 13 bandwidth-percent 1
cable rf-channel 14 bandwidth-percent 1
cable rf-channel 15 bandwidth-percent 1
!
interface Wideband-Cable5/1/0:2
description group 4x4-1
load-interval 30
cable bundle 1
cable rf-channel 0 bandwidth-percent 1
cable rf-channel 1 bandwidth-percent 1
cable rf-channel 2 bandwidth-percent 1
cable rf-channel 3 bandwidth-percent 1
!
interface Wideband-Cable5/1/0:3
description group 8x4-3
load-interval 30
cable bundle 1
cable rf-channel 12 bandwidth-percent 1
cable rf-channel 13 bandwidth-percent 1
cable rf-channel 14 bandwidth-percent 1
cable rf-channel 15 bandwidth-percent 1
cable rf-channel 16 bandwidth-percent 1
cable rf-channel 17 bandwidth-percent 1
cable rf-channel 18 bandwidth-percent 1
cable rf-channel 19 bandwidth-percent 1
!
interface Wideband-Cable5/1/0:4
cable bundle 1
cable rf-channel 4 bandwidth-percent 1
cable rf-channel 5 bandwidth-percent 1
cable rf-channel 6 bandwidth-percent 1
cable rf-channel 7 bandwidth-percent 1
cable rf-channel 8 bandwidth-percent 1
cable rf-channel 9 bandwidth-percent 1
cable rf-channel 10 bandwidth-percent 1
cable rf-channel 11 bandwidth-percent 1
!
interface Wideband-Cable5/1/0:5
cable bundle 1
cable rf-channel 0 bandwidth-percent 1
cable rf-channel 1 bandwidth-percent 1
cable rf-channel 2 bandwidth-percent 1
cable rf-channel 3 bandwidth-percent 1
cable rf-channel 16 bandwidth-percent 1
cable rf-channel 17 bandwidth-percent 1
cable rf-channel 18 bandwidth-percent 1
cable rf-channel 19 bandwidth-percent 1

mbowe
1/ For each primary DS, you

1/ For each primary DS, you need at least 1 x 4way and 1 x 8way bonding group that "covers" that channel.
In your case, you already have 8 way groups covering every channel (good), but you are only covering ch0-3 with 4way group (bad).
If every channel, or every 2nd channel, or every 4th channel is primary, you should create additional 4 way groups for ch 4-7, 8-11, 12-15, 16-19.Or i
Or if every 8th channel is primary, you would create additional 4 way groups for 8-11, 16-19

2/ With your 8 way bonding groups, it is safest to only ever use contiguous channels.
This is because many 8x4 modems have a 60MHz capture window.
So I would not recommend having your wideband5/1/0:5 (covers 0-3,16-19) because that exceeds the 60MHz window.

Killa200
Levels

What are the levels looking like at the modems that only bond to a single upstream channel?