Here is the modem
llv7246vxr#sh cable modem 10.1.114.112 verbose
MAC Address : 044e.5a35.2270
IP Address : 10.1.114.112
IPv6 Address : ---
Dual IP : N
Prim Sid : 5247
Host Interface : C5/0/UB
MD-DS-SG / MD-US-SG : 1 / 5
MD-CM-SG : 0x200105
Primary Wideband Channel ID : 25 (Wi5/0:0)
Primary Downstream : In5/0:1 (RfId : 33)
Wideband Capable : Y
RCP Index : 3
RCP ID : 00 10 00 00 08
Downstream Channel DCID RF Channel : 18 5/0:1
Downstream Channel DCID RF Channel : 17 5/0:0
Downstream Channel DCID RF Channel : 19 5/0:2
Downstream Channel DCID RF Channel : 20 5/0:3
Downstream Channel DCID RF Channel : 21 5/1:0
Downstream Channel DCID RF Channel : 22 5/1:1
Downstream Channel DCID RF Channel : 23 5/1:2
Downstream Channel DCID RF Channel : 24 5/1:3
UDC Enabled : N
Extended Upstream Transmit Power : 54dB
Multi-Transmit Channel Mode : Y
Number of US in UBG : 2
Upstream Channel : US0 US1
Ranging Status : sta sta
Upstream SNR (dB) : 25.78 26.5
Upstream Data SNR (dB) : -- --
Received Power (dBmV) : 0.00 0.00
Reported Transmit Power (dBmV) : 49.75 49.75
Peak Transmit Power (dBmV) : 54.00 54.00
Phy Max Power (dBmV) : 54.00 54.00
Minimum Transmit Power (dBmV) : 20.00 20.00
Timing Offset (97.6 ns): 2828 2826
Initial Timing Offset : 2828 2572
Rng Timing Adj Moving Avg(0.381 ns): -512 3
Rng Timing Adj Lt Moving Avg : -396 1251
Rng Timing Adj Minimum : -512 0
Rng Timing Adj Maximum : 0 65024
Pre-EQ Good : 0 0
Pre-EQ Scaled : 33 10
Pre-EQ Impulse : 0 0
Pre-EQ Direct Loads : 0 0
Good Codewords rx : 71048 30704
Corrected Codewords rx : 133 15
Uncorrectable Codewords rx : 0 0
Phy Operating Mode : atdma* atdma*
sysDescr :
Downstream Power : 0.00 dBmV (SNR = ----- dB)
MAC Version : DOC3.0
QoS Provisioned Mode : DOC1.1
Enable DOCSIS2.0 Mode : Y
Modem Status : {Modem= w-online, Security=disabled}
Capabilities : {Frag=N, Concat=N, PHS=Y}
Security Capabilities : {Priv=, EAE=Y, Key_len=}
L2VPN Capabilities : {L2VPN=Y, eSAFE=N}
Sid/Said Limit : {Max US Sids=32, Max DS Saids=24}
Optional Filtering Support : {802.1P=N, 802.1Q=N, DUT=Y}
Transmit Equalizer Support : {Taps/Symbol= 1, Num of Taps= 24}
Number of CPE : 1(Max CPE = 8)
Number of CPE IPs : 1(Max CPE IPs = 16)
Number of CPE IPv6 : 0(Max CPE IPv6 = 16)
CFG Max-CPE : 8
Flaps : 1(Nov 20 07:52:34)
Errors : 0 CRCs, 0 HCSes
Stn Mtn Failures : 0 aborts, 1 exhausted
Total US Flows : 1(1 active)
Total DS Flows : 1(1 active)
Total US Data : 86364 packets, 20965249 bytes
Total US Throughput : 3199 bits/sec, 1 packets/sec
Total DS Data : 189039 packets, 270196687 bytes
Total DS Throughput : 1533 bits/sec, 0 packets/sec
LB group ID assigned (index) : 2149581061 (40960)
LB group ID in config file (index) : N/A (N/A)
LB policy ID : 0
LB policy ID in config file : 0
LB priority : 0
Tag :
Required DS Attribute Mask : 0x0
Forbidden DS Attribute Mask : 0x0
Required US Attribute Mask : 0x0
Forbidden US Attribute Mask : 0x0
Service Type ID :
Service Type ID in config file :
Ranging Class ID : 0x1
Active Classifiers : 0 (Max = NO LIMIT)
CM Upstream Filter Group : 0
CM Downstream Filter Group : 0
CPE Upstream Filter Group : 0
CPE Downstream Filter Group : 0
DSA/DSX messages : permit all
Voice Enabled : NO
DS Change Times : 0
Boolean Services : 2
CM Energy Management Capable : N
CM Enable Energy Management : N
CM Enter Energy Management : NO
Number of Multicast DSIDs Support : 24
MDF Capability Mode : 2
IGMP/MLD Version : IGMPv3
FCType10 Forwarding Support : Y
Features Bitmask : 0x0
Total Time Online : 06:53 (06:53 since last counter reset)
CM Initialization Reason : POWER_ON
CFG Max IPv6 CPE Prefix : 16 (-1 used)
llv7246vxr#
llv7246vxr#sh cable modem 10.1.114.112 service-flow
SUMMARY:
MAC Address IP Address Host MAC Prim Num Primary DS
Interface State Sid CPE Downstream RfId
044e.5a35.2270 10.1.114.112 C5/0/UB w-online 5247 1 In5/0:1 33
Sfid Dir Curr Sid Sched Prio MaxSusRate MaxBrst MinRsvRate Throughput
State Type
2957 US act 5247 BE 3 25000000 4000 0 2958
2958 DS act N/A N/A 7 85000000 4000 0 1355
CfrId SFID CM Mac Address Direction State Priority Matches
llv7246vxr#
What can I do to get US throughput higher.
llv7246vxr#sh cable fiber-node 1
---------------------------------------------------------------------------------
Fiber-Node 1
Description: Slot 5
Channel(s) : downstream Integrated-Cable 5/0: 0-3
Channel ID(s): 17, 18, 19, 20
Channel(s) : downstream Integrated-Cable 5/1: 0-3
Channel ID(s): 21, 22, 23, 24
upstream Cable 5: 0-3 (I have changed this value but does not reflect in config)
FN Config Status: Configured (status flags = 0x01)
MDD Status: Valid
llv7246vxr#
Any suggestions would be helpful.
Scot
Need to see your upstream configurations. Please provide output from "sh run int cable 5/0"
But general tips for fast uploads would be :
* Set the US channel-width as wide as possible, eg 6.4 with fallback to 3.2
* Set the US modulation-profile as high as possible, eg 64QAM with fallback to 16QAM
* Double the default US minislot-size (eg 6.4 width defaults to 1, so change it to 2)
* Increase the US max-burst of the modem to something large like 28000
interface Cable5/0
downstream Integrated-Cable 5/0 rf-channel 0-3
downstream Integrated-Cable 5/1 rf-channel 0-3
cable mtc-mode
no cable packet-cache
cable default-phy-burst 0
cable bundle 1
cable upstream max-ports 2
cable upstream bonding-group 1
upstream 0
upstream 1
attributes 80000000
cable upstream 0 connector 0
cable upstream 0 frequency 29000000
cable upstream 0 channel-width 3200000 3200000
cable upstream 0 docsis-mode atdma
cable upstream 0 minislot-size 2
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 225
cable upstream 0 equalization-coefficient
no cable upstream 0 shutdown
cable upstream 1 connector 1
cable upstream 1 frequency 37000000
cable upstream 1 channel-width 3200000 3200000
cable upstream 1 docsis-mode atdma
cable upstream 1 minislot-size 2
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 225
cable upstream 1 equalization-coefficient
no cable upstream 1 shutdown
end
Thinking the problem was US SNR. I backed off from this mod profile to the second. I saw no change. This unit is in production. Was using 224 then backed off to 16qam only in 225.
224 request 16qam 36 no 0x0 0x10 0x152 0 22 no yes 0 qpsk1 no
224 initial 16qam 384 no 0x5 0x22 0x152 0 48 no yes 0 qpsk1 no
224 station 16qam 384 no 0x5 0x22 0x152 0 48 no yes 0 qpsk1 no
224 a-short 64qam 64 no 0x6 0x4C 0x152 6 22 yes yes 0 qpsk1 yes
224 a-long 64qam 64 no 0x9 0xE8 0x152 0 22 yes yes 0 qpsk1 yes
224 a-ugs 16qam 64 no 0x9 0xE8 0x152 0 22 yes yes 0 qpsk1 no
225 request 16qam 36 no 0x0 0x10 0x152 0 22 no yes 0 qpsk1 no
225 initial 16qam 384 no 0x5 0x22 0x152 0 48 no yes 0 qpsk1 no
225 station 16qam 384 no 0x5 0x22 0x152 0 48 no yes 0 qpsk1 no
225 a-short 16qam 64 no 0x6 0x4C 0x152 6 22 yes yes 0 qpsk1 yes
225 a-long 16qam 64 no 0x9 0xE8 0x152 0 22 yes yes 0 qpsk1 yes
225 a-ugs 16qam 64 no 0x9 0xE8 0x152 0 22 yes yes 0 qpsk1 no
* Try setting the modulation-profile to 224 225
* If you are running 3.2 width, change the default minislot-size from 2 to 4
* Increase the service-flow max-burst from 4000 to something large like 28000
The one post that showed an SNR of 25.x, but it changes and varies from one port to another. check the uncorrectables 3 or 4 times and see how much the value changes. good indicator the mod profile should be changed
my golden run for SNR and mod profile is
qpsk snr 18 and higher
16qam snr 21 and higher
32qam snr 25 and higher
64qam snr 28 and higher
Hope this helps
Carl
I now have better uploads I switched back to mod profile 224 and adjusted minislots. The key i think is the burst rate from 4000 to 28000. Correct me if i am wrong the mod profile is negotiated based on signal quality. Can i not build a profile that will check up to 64Qam and set a modem to a level that works for it. So on the same US i can have modems at different compression rates? I have US 3 and 4 wired but the levels were below 25 24.xx will adding these US with a lower level of compression still expand the upload rate. Right now i am ok with what i have now. Test at 19mbs for upload. Thanks.
> Can i not build a profile that will check up to 64Qam and set a modem to a level that works for it.
> So on the same US i can have modems at different compression rates?
No the modulation is per-upstream, not per-modem
You can set the upstream to have multiple profiles/widths, and the CMTS will apply rules and dynamically switch if conditions are poor
eg
cable upstream X modulation-profile 224 225 226
cable upstream X channel-width 6400000 3200000
Or if you don't want to use dynamic switching, you could examine your levels and manually set different upstreams to different width/modulations. For example noise is usually worse at lower frequencies, so you could set your lower upstreams to 16QAM and the higher frequency ones to 64QAM. Best bet is to use a graphing app like MRTG to monitor the USSNR, correctables, uncorrectables etc
Very good info this has helped immensely I am going to let the current setting settle in to make sure it will stay in place.Thanks -Scot
Oh, and one other tip...
If you start playing with 3x and 4x US bonding, to get best speeds you will likely need to add following commands to the mac domain (interface cable 5/0) :
cable sid-cluster-group num-of-cluster 2
cable sid-cluster-switching max-request 4