The Cable Modem only detects 5 frequencies in Dowstream, now when I look at my monitoring system, the graphs show that the balance is being made with 8 Dowstreams.
2) At this second point I have a question, it shows me the cable modem that is DOCSIS version 3 but that the QOS is 1.1, do I need to assign a DOCSIS 3.0 file or am I wrong?
CMTS01#show cable modem docsis version | in 1111.1111.0000
1111.1111.0000 C7/0/0/UB w-online 240 3.0 1.1 atdma* WB
=====================================================================================
3) Here you can see my configuration
controller Integrated-Cable 7/0/0
rf-channel 0 cable downstream channel-id 25
rf-channel 0 frequency 537000000 annex B modulation 256qam interleave 64
rf-channel 0 rf-power 52.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 26
rf-channel 1 frequency 543000000 annex B modulation 256qam interleave 64
rf-channel 1 rf-power 52.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 27
rf-channel 2 frequency 549000000 annex B modulation 256qam interleave 64
rf-channel 2 rf-power 52.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 28
rf-channel 3 frequency 555000000 annex B modulation 256qam interleave 64
rf-channel 3 rf-power 52.0
no rf-channel 3 rf-shutdown
!
!
controller Integrated-Cable 7/0/1
rf-channel 0 cable downstream channel-id 29
rf-channel 0 frequency 627000000 annex B modulation 256qam interleave 64
rf-channel 0 rf-power 52.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 30
rf-channel 1 frequency 633000000 annex B modulation 256qam interleave 64
rf-channel 1 rf-power 52.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 31
rf-channel 2 frequency 639000000 annex B modulation 256qam interleave 64
rf-channel 2 rf-power 52.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 32
rf-channel 3 frequency 645000000 annex B modulation 256qam interleave 64
rf-channel 3 rf-power 52.0
no rf-channel 3 rf-shutdown
Most 8x4 modems require the 8 channels to be within a 60MHz window.
Your channels aren't setup like this, you have 4 channels (24MHz), then 72MHz gap, then another 4 channels (24MHz).
16/24/32 channel modems don't have this same limitation. Their tuner is powerful and can lock to channels with any spacing.
Solutions :
1. Move the 8 channels to be an adjacent/contiguous 48MHz block. Or at least within 60MHz (10 channel) window.
or
2. Use 4X DS bonding groups only (this is not ideal)
or
3. Dont use 8x4 modems, use 16x4 or better (may not be possible if you have tons of 8x4 deployed)
And with regards to the QoS, there are only 2 x types : 1.0 and 1.1
QoS 1.1 is the correct type for DOCSIS 1.1, 2.0 and 3.0 modems
Hi what are your suppliers ? Cm and cmts
Also if you can share configuration to understand your situation
Hi
I have I-CMTS Cisco uBR10K with MC20x20V and Cable modem Motorolla, Cisco, Arris for DOCSIS 3.0
What frequencies are your 8 channels ?
Ideally they will all be adjacent / contiguous.
1) Here the example where the cable modem only detects 5 download frequencies
#show cable modem wideband channel | in 1.1.1.1
1111.1111.0000 1.1.1.1 C7/0/0/UB w-online 5x4 Wi7/0/0:2
2) At this second point I have a question, it shows me the cable modem that is DOCSIS version 3 but that the QOS is 1.1, do I need to assign a DOCSIS 3.0 file or am I wrong?
CMTS01#show cable modem docsis version | in 1111.1111.0000
1111.1111.0000 C7/0/0/UB w-online 240 3.0 1.1 atdma* WB
=====================================================================================
3) Here you can see my configuration
controller Integrated-Cable 7/0/0
rf-channel 0 cable downstream channel-id 25
rf-channel 0 frequency 537000000 annex B modulation 256qam interleave 64
rf-channel 0 rf-power 52.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 26
rf-channel 1 frequency 543000000 annex B modulation 256qam interleave 64
rf-channel 1 rf-power 52.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 27
rf-channel 2 frequency 549000000 annex B modulation 256qam interleave 64
rf-channel 2 rf-power 52.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 28
rf-channel 3 frequency 555000000 annex B modulation 256qam interleave 64
rf-channel 3 rf-power 52.0
no rf-channel 3 rf-shutdown
!
!
controller Integrated-Cable 7/0/1
rf-channel 0 cable downstream channel-id 29
rf-channel 0 frequency 627000000 annex B modulation 256qam interleave 64
rf-channel 0 rf-power 52.0
no rf-channel 0 rf-shutdown
rf-channel 1 cable downstream channel-id 30
rf-channel 1 frequency 633000000 annex B modulation 256qam interleave 64
rf-channel 1 rf-power 52.0
no rf-channel 1 rf-shutdown
rf-channel 2 cable downstream channel-id 31
rf-channel 2 frequency 639000000 annex B modulation 256qam interleave 64
rf-channel 2 rf-power 52.0
no rf-channel 2 rf-shutdown
rf-channel 3 cable downstream channel-id 32
rf-channel 3 frequency 645000000 annex B modulation 256qam interleave 64
rf-channel 3 rf-power 52.0
no rf-channel 3 rf-shutdown
=====================================================================================
interface Cable7/0/0
downstream Integrated-Cable 7/0/0 rf-channel 0-3
downstream Integrated-Cable 7/0/1 rf-channel 0-3
cable tftp-enforce
cable mtc-mode
no cable packet-cache
cable default-phy-burst 4096
cable insertion-interval 500
cable bundle 1
cable upstream max-ports 8
cable upstream bonding-group 10
upstream 0
upstream 1
upstream 2
upstream 3
attributes 80000000
cable upstream bonding-group 11
upstream 4
upstream 5
upstream 6
upstream 7
attributes 80000000
!
!
interface Cable7/0/1
cable mtc-mode
no cable packet-cache
cable upstream max-ports 0
no keepalive
!
=========================================================================================
Most 8x4 modems require the 8 channels to be within a 60MHz window.
Your channels aren't setup like this, you have 4 channels (24MHz), then 72MHz gap, then another 4 channels (24MHz).
16/24/32 channel modems don't have this same limitation. Their tuner is powerful and can lock to channels with any spacing.
Solutions :
1. Move the 8 channels to be an adjacent/contiguous 48MHz block. Or at least within 60MHz (10 channel) window.
or
2. Use 4X DS bonding groups only (this is not ideal)
or
3. Dont use 8x4 modems, use 16x4 or better (may not be possible if you have tons of 8x4 deployed)
And with regards to the QoS, there are only 2 x types : 1.0 and 1.1
QoS 1.1 is the correct type for DOCSIS 1.1, 2.0 and 3.0 modems
Thank you very much for your quick support, I will work on your recommendations,
Slds