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Docsis 2.0 US speed problems

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Wodec
Docsis 2.0 US speed problems

hi all,

in test setup my docsis 2.0 speeds are : DS --> 37Mbits/s and US --> 305kbits/s

DS i'm satisfied, but US is a disaster...

Anyone an idee ??

Here my CM config file (CM = Scientific Atlanta Webstar)

Main
{
NetworkAccess 1;
MaxCPE 2;
UsServiceFlow
{
UsServiceFlowRef 2;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 30000000;
MaxTrafficBurst 65224;
MinReservedRate 25000000;
}
DsServiceFlow
{
DsServiceFlowRef 1;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 50000000;
MaxTrafficBurst 65224;
MinReservedRate 5000000;
}
GlobalPrivacyEnable 1;
DocsisTwoEnable 1;
}

And CMTS = Cisco ubr10012 setup:
...
cable modulation-profile 230 initial 5 34 0 48 64qam scrambler 152 no-diff 128 fixed qpsk1 1 2048
cable modulation-profile 230 station 5 34 0 48 64qam scrambler 152 no-diff 128 fixed qpsk1 1 2048
cable modulation-profile 230 a-short 6 76 6 22 64qam scrambler 152 no-diff 64 shortened qpsk1 1 2048
cable modulation-profile 230 a-long 8 231 0 22 64qam scrambler 152 no-diff 64 shortened qpsk1 1 2048
cable modulation-profile 230 a-ugs 8 231 0 22 64qam scrambler 152 no-diff 64 shortened qpsk1 1 2048
...
interface Cablex/x/x
no ip address
cable dynamic-secret reject nocrypt
no cable packet-cache
cable bundle 1
cable downstream annex A
cable downstream modulation 256qam
cable downstream frequency xxx
cable downstream channel-id 0
no cable downstream rf-shutdown
...
cable upstream 2 connector 2
cable upstream 2 spectrum-group 1
cable upstream 2 docsis-mode atdma
cable upstream 2 channel-width 6400000 3200000
cable upstream 2 minislot-size 1
cable upstream 2 power-level 0
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 230
no cable upstream 2 shutdown
....

Thanks in advance W.

briskola
Try loosing both the

Try loosing both the MinReservedRate options and just for starters try lowering the US MaxRateSustained down to for example 12000000 (12 megs). Try inserting "SchedulingType 2;" and "MaxTrafficBurst 3044;" into the US SF. I'm not familiar with the config of modulation on a UBR, but from other CMTS's viewpoint I'd say it looks peculiar. Also, if you enable privacy (GlobalPrivacyEnable 1) you should provide the privacy config, something along the lines of:

BaselinePrivacy
{
AuthTimeout 2;
AuthRejectTimeout 60;
SAMapMaxRetries 4;
SAMapWaitTimeout 1;
TEKGraceTime 60;
ReKeyTimeout 2;
OperTimeout 2;
AuthGraceTime 60;
ReAuthTimeout 2;
}

Best regards,
Neven

Wodec
test results still bad

First of all, thanks for your reply!

I've tried to rewrite the config file as sugested:

Main
{
NetworkAccess 1;
MaxCPE 2;
UsServiceFlow
{
UsServiceFlowRef 2;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 12000000;
MaxTrafficBurst 3044;
MinReservedRate 0;
SchedulingType 2;
}
DsServiceFlow
{
DsServiceFlowRef 1;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 50000000;
MaxTrafficBurst 65224;
MinReservedRate 0;
}
GlobalPrivacyEnable 1;
DocsisTwoEnable 1;
BaselinePrivacy
{
AuthTimeout 2;
AuthRejectTimeout 60;
SAMapMaxRetries 4;
SAMapWaitTimeout 1;
TEKGraceTime 60;
ReKeyTimeout 2;
OperTimeout 2;
AuthGraceTime 2;
ReAuthTimeout 2;
}
}

My test results are:

DS = 36Mbit/s
US = 2.4Mbit/s

Best regards,
W.

cmcaldas
up and down speeds

my modem file is below. on the upstream I get 20.4 Mbps and 30.1 on my downstream.

FileVersion = Version 6.0

03 (Net Access Control) = 1

17 (Baseline Privacy Configuration Settings Block)

S01 Author Wait Timeout = 10

S02 Re-auth Wait Timeout = 10

S03 Author Grace Timeout = 600

S04 Oper Wait Timeout = 10

S05 Re-key Wait Timeout = 10

S06 TEK Grace Time = 3600

S07 Auth Rej Wait Timeout = 60

18 (Maximum Number of CPE) = 6

24 (Upstream Service Flow Encodings)

S01 Service Flow Reference = 115

S06 QoS Parameter Set Type = 7

S07 Traffic Priority = 0

S08 Max Sustained Traffic Rate = 0

S09 Max Traffic Burst = 0

S14 Max Concatenated Burst = 0

S15 Service Flow Scheduling Type = 2

25 (Downstream Service Flow Encodings)

S01 Service Flow Reference = 15

S06 QoS Parameter Set Type = 7

S07 Traffic Priority = 0

S08 Max Sustained Traffic Rate = 40000000

29 (Privacy Enable) = 1

32 (Manufacturer's CVC)

Organization Name: Motorola Corporation

Validity NotBefore: 010925000000Z

Validity NotAfter: 130924235959Z

Serial Number: 4d 4e 27 2d ad 34 be de 0c a1 8e 48 7c 7f 82 ca

NOTE: Informational only.

Actual file must be specified as source for giconfig.

39 (DOCSIS 2.0 Enable) = 1

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