I have a ubr7246vxr with mc28u setup where modems lock on, but i am limited to 10Mb down and 2Mb up. Single modem using ftp across the connection to test throughput.
Cable Modem Moto SB6141-RB
LLV-cmts-VXR#sh cable modem
MAC Address IP Address I/F MAC Prim RxPwr Timing Num BPI
State Sid (dBmv) Offset CPE Enb
f80b.bede.61aa 10.1.114.23 C5/0/U0 online(pt) 27 0.00 1492 1 Y
LLV-cmts-VXR#sh cable modem mac
MAC Address MAC Prim Ver QoS Frag Concat PHS Priv DS US
State Sid Prov Saids Sids
f80b.bede.61aa online(pt) 27 DOC2.0 DOC1.1 yes yes yes BPI+ 24 32
interface Cable5/0
no ip address
no cable packet-cache
cable bundle 1
cable downstream channel-id 123
cable downstream annex B
cable downstream modulation 256qam
cable downstream interleave-depth 64
cable downstream frequency 789000000
no cable downstream rf-shutdown
cable downstream rf-power 60
cable upstream max-ports 4
cable upstream 0 connector 0
cable upstream 0 frequency 31000000
cable upstream 0 ingress-noise-cancellation 200
cable upstream 0 docsis-mode atdma
cable upstream 0 channel-width 6400000 6400000
cable upstream 0 minislot-size 1
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 241
no cable upstream 0 shutdown
docsis file
Network Access Control:on
Maximum Number of CPEs:8
Upstream Service Flow Encodings
Service Flow Reference:1
Quality of Service Parameter Set:provisioned admitted active
Traffic Priority:7
Upstream Maximum Sustained Traffic Rate:0
Downstream Service Flow Encodings
Service Flow Reference:2
Quality of Service Parameter Set:provisioned admitted active
Traffic Priority:7
Downstream Maximum Sustained Traffic Rate:0
Any ideas what i might be doing wrong here would be helpful.
Scot
10M down is suspicious, you should be able to get 30M easily. What sort of power levels is the modem showing?
2M up is pretty standard unless you make some tweaks like shown below :
on the cmts,
interface Cable5/0
cable default-phy-burst 0
cable upstream 0 minislot-size 2
in the cm config file
for the US service flow, set max-burst to 4000 and max-concat-burst to 4000
I finally read some more documentation on the modulation profiles and got to around 30 down. Thank you for the comments on upload will try that.
This profile got the upstream to where i was expecting it.
cable modulation-profile 249 request 0 16 0 8 64qam scrambler 152 no-diff 96 fixed qpsk1 1 2048
cable modulation-profile 249 initial 9 34 0 48 64qam scrambler 152 no-diff 130 fixed qpsk1 1 2048
cable modulation-profile 249 station 9 34 0 48 64qam scrambler 152 no-diff 130 fixed qpsk1 1 2048
cable modulation-profile 249 a-short 9 78 14 14 64qam scrambler 152 no-diff 100 shortened qpsk1 1 2048
cable modulation-profile 249 a-long 11 232 96 56 64qam scrambler 152 no-diff 160 shortened qpsk1 1 2048
cable modulation-profile 249 a-ugs 11 232 96 56 64qam scrambler 152 no-diff 160 shortened qpsk1 1 2048
I will reply with my results on the downstream tweaks.
Thanks
Scot