CODA-4582 - Open Issues for Investigation

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I Plan to Stick Around
Posts: 18

Re: CODA-4582 - Open Issues for Investigation

I've been having ongoing speed issues since June 23rd when my modem stopped being able to lock all 32 downstream channels with "RCS Partial Service" being listed in the modem logs. The first Rogers rep had opened a ticket with the maintenance team to diagnose the issue. The 2nd rep I spoke with said that I required a tech visit, he came by and tested all the signals coming into the house as well as the signal going to the modem and said the signals were perfect and the modem needed to be replaced.

 

After replacing the modem the "RCS Partial Service" error went away but I am only receiving 400-500Mbps Download and 3Mbps upload with a ping of 5-25ms using various speedtest.net Toronto servers. I phoned back in after replacing the modem and the 3rd rep said that the signal looks perfect and that he said a  network ticket needed to be created to diagnose this issue since everyone else is the area is not experiencing this issue.

Modem DOCSIS WAN Stats:


IP Address   xxxxxx
Subnet Mask    255.255.252.0
Gateway IP Address    7.1.200.1
DHCP Lease Time    D: 07 H: 00 M: 00 S: 00
Downstream Overview
Port ID    Frequency (MHz)    Modulation    Signal strength (dBmV)    Channel ID    Signal noise ratio (dB)
1    591000000    256QAM    1.600    7    38.605
2    855000000    256QAM    -2.200    3    36.610
3    861000000    256QAM    -3.400    4    35.780
4    579000000    256QAM    1.700    5    38.983
5    585000000    256QAM    1.300    6    38.605
6    849000000    256QAM    -1.500    2    36.610
7    597000000    256QAM    1.100    8    38.605
8    603000000    256QAM    1.100    9    37.356
9    609000000    256QAM    1.400    10    38.605
10    615000000    256QAM    1.300    11    38.605
11    621000000    256QAM    1.400    12    37.636
12    633000000    256QAM    1.900    13    37.636
13    639000000    256QAM    2.300    14    38.605
14    645000000    256QAM    2.500    15    37.636
15    651000000    256QAM    2.700    16    37.636
16    657000000    256QAM    3.000    17    38.605
17    663000000    256QAM    3.300    18    38.605
18    669000000    256QAM    3.400    19    38.605
19    675000000    256QAM    3.600    20    38.605
20    681000000    256QAM    3.300    21    37.636
21    687000000    256QAM    3.400    22    38.605
22    693000000    256QAM    3.300    23    38.605
23    699000000    256QAM    3.400    24    37.636
24    705000000    256QAM    3.400    25    38.605
25    711000000    256QAM    3.400    26    38.983
26    717000000    256QAM    3.200    27    38.983
27    723000000    256QAM    2.900    28    38.605
28    825000000    256QAM    0.700    29    37.356
29    831000000    256QAM    0.500    30    37.356
30    837000000    256QAM    0.000    31    37.356
31    843000000    256QAM    -0.600    32    36.610
32    303000000    256QAM    3.700    1    38.983
OFDM Downstream Overview
Receiver    FFT type    Subcarr 0 Frequency(MHz)    PLC locked    NCP locked    MDC1 locked    PLC power(dBmv)
0    4K    275600000    YES    YES    YES    3.799999
1    NA    NA    NO    NO    NO    NA
Upstream Overview
Port ID    Frequency (MHz)    Modulation    Signal strength (dBmV)    Channel ID    Bandwidth
1    38595824    ATDMA - 64QAM    39.000    3    3200000
2    30596000    ATDMA - 64QAM    35.250    1    6400000
3    23700000    ATDMA - 64QAM    34.500    2    6400000
OFDM/OFDMA Overview
Channel Index    State    lin Digital Att    Digital Att    BW (sc's*fft)    Report Power     Report Power1_6    FFT Size
0    DISABLED    0.5000    0.0000    0.0000    -inf    -1.0000    4K
1    DISABLED    0.5000    0.0000    0.0000    -inf    -1.0000    4K

 

DOCSIS Event:

1    01/01/1970 00:02:06    84000500    critical    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=xxxxxx0;CMTS-MAC=00:17:10:00:ec:6f;CM-QOS=1.1;CM-VER=3.1;
2    01/01/1970 00:01:10    82000200    critical    No Ranging Response received - T3 time-out;CM-MAC=xxxxx0;CMTS-MAC=xxxxa;CM-QOS=1.1;CM-VER=3.1;
3    07/03/2017 20:24:03    90000000    warning    MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxxx0;CMTS-MAC=xxxx;CM-QOS=1.1;CM-VER=3.1;
4    07/03/2017 20:24:13    69010200    notice    SW Download INIT - Via Config file bac108000106ac202e04ac10
5    07/03/2017 20:25:03    69011200    notice    SW download Successful - Via Config file
6    07/03/2017 20:33:30    90000000    warning    MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=xxx;CMTS-MAC=xxx2a;CM-QOS=1.1;CM-VER=3.1;
7    07/03/2017 20:55:04    82000200    critical    No Ranging Response received - T3 time-out;CM-MACxxxxx0;CMTS-MAC=0xxxx;CM-QOS=1.1;CM-VER=3.1;
8    07/03/2017 20:58:43    68010300    error    DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=xxxx0;CMTS-MAC=xxxx;CM-QOS=1.1;CM-VER=3.1;
9    07/03/2017 21:56:05    82000200    critical    No Ranging Response received - T3 time-out;CM-MACxxxxxx;CMTS-MAC=xxx;CM-QOS=1.1;CM-VER=3.1;

 

Speedtests:

Teksavvy Server

 

Rogers Server

 

Beanfield Metroconnect

 

DSLReports

 

Ping is also very unstable while gaming, modem is in bridge mode on Gigabit plan.

I'm a Reliable Contributor
Posts: 338

Re: CODA-4582 - Open Issues for Investigation

@Max24

 

I had issues with modems and speed in the past and here are some suggestions I can pass along:

 

Verify your speed profile:

 

Verify that you are on the correct speed profile.  You can send a private message to  @CommunityHelps and they can confirm that you are on the proper profile.  No amount of speed tests will give you the right speeds if you are not setup correctly.  Please keep in mind that in the early stages of the Gigabit deployment, many areas were just provisioned to 500 Mbps speeds. When the area was confirmed for Gigabit speeds, most accounts were automatically bumped up to 1 Gbps but some customers profiles were not upgraded due to various factors.

 

Try These Speed Test Sites:

 

Try running your speed tests from the following servers:

 

Rogers:  http://speedcheck.rogers.com/en.html

 

Digital Ocean:  http://speedtest-tor1.digitalocean.com/

 

Make sure you are testing with a WIRED CAT 6 Cable

 

I am not sure if you are using a wired Cat 6 cable or wifi as this makes a HUGE difference.  Most AC based wifi adapters would max out around 550 Mbps in real world tests so your current speeds are not too far from this value.

 

Check your network card settings:

 

This article which deals with MS SQL Server Optimization has several suggestions that one can use to tweak the settings on their network card:  https://msdn.microsoft.com/en-us/library/cc558565(v=bts.10).aspx

 

The points that I would look at adjusting are the following.  Please note that you should be comfortable making these changes and some of the options may not be present for your network card.

 

 

Power Option – Configure the network adapter driver to prevent power management functionality from turning off the network adapter to save power. This functionality may be useful for client computers but should seldom, if ever, be used on a BizTalk Server or SQL Server computer.

 

Fixed Speed/Duplex (do not use AUTO) - It is very important that the network speed, duplex, and flow control parameters are set to correspond to the settings on the switch to which they are connected. This will mitigate the occurrence of periodic “auto-synchronization” which may temporarily take connections off-line.

 

Max Coalesce Buffers - Map registers are system resources used to convert physical addresses to virtual addresses for network adapters that support bus mastering. Coalesce buffers are available to the network driver if the driver runs out of map registers. Set this value as high as possible for maximum performance. On servers with limited physical memory, this may have a negative impact as coalesce buffers consume system memory. On most systems however, the maximum setting can be applied without significantly reducing available memory.

 

Max Transmit/Send Descriptors and Send Buffers - This setting specifies how many transmit control buffers the driver allocates for use by the network interface. This directly reflects the number of outstanding packets the driver can have in its “send” queue. Set this value as high as possible for maximum performance. On servers with limited physical memory, this may have a negative impact as send buffers consume system memory. On most systems however, the maximum setting can be applied without significantly reducing available memory.

 

Max Receive Buffers - This setting specifies the amount of memory buffer used by the network interface driver when copying data to the protocol memory. It is normally set by default to a relatively low value. Set this value as high as possible for maximum performance. On servers with limited physical memory, this may have a negative impact as receive buffers consume system memory. On most systems however, the maximum setting can be applied without significantly reducing available memory.

 

All offload options ON - In almost all cases performance is improved when enabling network interface offload features. Some network adapters provide separate parameters to enable or disable offloading for send and receive traffic. Offloading tasks from the CPU to the network adapter can help lower CPU usage on the server which will improve overall system performance. The Microsoft TCP/IP transport can offload one or more of the following tasks to a network adapter that has the appropriate capabilities:

 

Wake On LAN disabled (unless being used) – Configure the network adapter driver to disable wake-on lan functionality. This functionality may be useful for client computers but should seldom if ever be used on a BizTalk Server or SQL Server computer.

 

Registry Tweaks

 

If you are comfortable with registry tweaks, TCP optimizer 4 can be helpful to get you to squeeze the maximum performance from your network card.  Again, this is only recommended to those who know what they are getting into and is not something I can suggest to the avg. user.

 

https://www.speedguide.net/downloads.php

 

As an aside, I had my 9 year old desktop PC running an Q9300 CPU and a Gigbit network adapter not getting past 300 Mbps in speed tests.  After performing the above suggestions, I can get close to 900 Mbps.  

 

Hope this helps

 

Thanks

 

 

I Plan to Stick Around
Posts: 154

Re: CODA-4582 - Open Issues for Investigation

Great post, but one small clarification:

 

@mahomed wrote:

 

Make sure you are testing with a WIRED CAT 6 Cable


Being on WiFi absolutely will kill your performance, good point, but the CAT 6 isn't necessary -- CAT 5e works perfectly fine for gigabit.

 

It's strange that you had an old computer that only got 300mbit, pretty much any computer should, out of the box, be able to get gigabit speeds (or close to it) on their gigabit port. I have a laptop from 2005 which, OOTB Windows 7, gets the full ~930mbit on speedtest (when my internet connection permits) and 120MB/sec sustained copy between computers (from SSD to SSD). It was true back in Windows XP days that tweaks were needed, especially for poor drivers or cards, but these days OOTB everything should be fine.

 

One easy way to test, if you have multiple devices, is to just copy a file from one computer to another. If you get near gigabit speeds there, you can skip all of that tweaking as the problem lies elsewhere. You can also run the speed tests on the other computer and compare.

 

I had an issue before on my new laptop where there is built-in QoS software which auto-detected my connection speed at 250mbit, and thus limited my internet speed to the same. It was very frustrating for a while as I was SURE that Rogers had me on the wrong profile (since I could computer-to-computer copy files at gigabit speeds), only to find from another computer that the internet speeds were full. Took me a while to find the QoS software setting.

I Plan to Stick Around
Posts: 18

Re: CODA-4582 - Open Issues for Investigation

@mahomed

 

Thanks for the detailed response. I've sent a message to @CommunityHelps to verify that I am on the correct speed profile. I should mention that this issue only recently started happening and before June 23rd I was able to get max speed consistently throughout the day averaging: ~900-950Mbps Download and 40-53Mbps Upload speeds. So it sounds to me that they've decided to throttle my connection since no other customers in the area have reported any speed issues or anything related.

 

The Digital Ocean results were 643.62Mbps Download and 4.07Mbps Upload using the TOR1 server. I don't use flash player anymore so I've skipped the rogers speed test. As for your network optimization tweaks I've already implemented them when I upgraded my computer in January but thank you.

I Plan to Stick Around
Posts: 32

Re: CODA-4582 - Open Issues for Investigation

Just another update @RogersDave: It appears that reverting back to .27 has had no impact on improving my latency issue. I'll continue to troubleshoot on my end but it seems this isn't related Smiley Sad

 

Feel free to toss me back onto the .29 if you're able.

I'm a Reliable Contributor
Posts: 338

Re: CODA-4582 - Open Issues for Investigation

@Telek

 

Thanks for your reply and the info.

 

I mentioned CAT6 as the cable tends to offer better shielding than CAT5e.  I have had to setup some routers/switches for many friends and offices and the first thing we used to try was swapping a cable before tinkering with a number of items.  Many stores sell inexpensive cables and some places (believe or not) have taken CAT 5 cabling and mislabeled it as CAT 5e. Given the pricing of CAT 6 cables these days, I opted towards having a margin of safely.  I do agree with you that a good quality CAT 5e cable should be able to get Gigabit speed.

 

As for my old desktop, transferring files between systems I would get around 990 Mbps and downloads were about a 1/3 of that.  I didn't think that I would have to resort to tweaking the NIC settings to get the faster speed but this is exactly what I did and it seemed to do the trick.  

 

I am pretty sure I disabled the QOS on the systems as I know that will suck as much as 20% of the Internet speed.  For Windows 10, I believe the steps are as follows:

 

You can follow the steps below to disable QOS packet scheduler however it is not recommended:

 

NOTE:  Make sure you have ADMIN privileges to make these changes.  

 

  1. Press Windows + R key from your keyboard.
  2. Type gpedit.msc on the run box.
  3. Expand the "local computer policy" branch.
  4. Expand the "administrative templates" branch.
  5. Expand the "network branch".
  6. Highlight the "QOS Packet Scheduler" in left window.
  7. In right window double click the "Bandwidth Limit" setting.
  8. On setting tab check the "enabled" item.
  9. Where it says "Bandwidth limit %" change it to read 0.
  10. Reboot the PC

 

I Plan to Stick Around
Posts: 18

Re: CODA-4582 - Open Issues for Investigation

UPDATE

 

Just got off the phone with Rogers to check on the status of the Network ticket they created to try and troubleshoot and diagnose the ongoing speed issues I've been having the were unable to find the problem or anything wrong. So to recap I've been receiving ~400-500Mbps download and 2-4Mbps upload since June 23rd and I've replaced the modem, had a technician come out check the signal coming into the house as well as the signal to the modem and both were "perfect", had phone support repush the speed profile and had @CommunityHelps verify the speed profile (it's correct 1000Mbps/50Mbps),  tried the reverting the modem back to gateway mode, opened 3 network tickets and the issue is still on-going.

 

@RogersDavecare to shed some light on this? Is Rogers back to throttling users as I don't see any other explanation for this issue.

Resident Expert
Resident Expert
Posts: 1,067

Re: CODA-4582 - Open Issues for Investigation


@Max24 wrote:

UPDATE

 

Just got off the phone with Rogers to check on the status of the Network ticket they created to try and troubleshoot and diagnose the ongoing speed issues I've been having the were unable to find the problem or anything wrong. So to recap I've been receiving ~400-500Mbps download and 2-4Mbps upload since June 23rd and I've replaced the modem, had a technician come out check the signal coming into the house as well as the signal to the modem and both were "perfect", had phone support repush the speed profile and had @CommunityHelps verify the speed profile (it's correct 1000Mbps/50Mbps),  tried the reverting the modem back to gateway mode, opened 3 network tickets and the issue is still on-going.

 

@RogersDavecare to shed some light on this? Is Rogers back to throttling users as I don't see any other explanation for this issue.


Rogers is not throttling users, I can get full speeds. Have you tried using multiple wired devices to test? It will help us rule out if this is a single device issue.

Do the speeds ever improve or change depending on the time of day? Can you log in to the modem and post the DOCSIS WAN line stats/signal please.

 



Highlighted
I Plan to Stick Around
Posts: 18

Re: CODA-4582 - Open Issues for Investigation

I've tested it wired with my MBP speed is the same regardless of the device connected. Speed is consistent throughout the day and I'ved tested it during the morning, afternoon, evening and at night always the between the same range I mentioned in the previous posts. I've posted the modem stats in my first post at the top of the page Message #2201.

I'm a Reliable Contributor
Posts: 338

Re: CODA-4582 - Open Issues for Investigation

@Max24

 

I would suggest doing a speedtest in the wee hours of the morning to see if the speed increases.  If there is big difference, then it is a capacity issue.  If the speed is the same, we need to do more investigation.

 

Can you also try the following:

 

- Disconnect all other devices (wired, wireless) from the router

 

- Turn off the 2.4 Ghz band on the modem (this band had interference issues on this modem in the early days which I discovered) 

 

- Plug in a CAT 6 cable from the modem to your computer (make sure not to use port 1)

- If you have another Ethernet cable, use that to rule out cable problems. 

 

Run a speedtest from http://speedtest-tor1.digitalocean.com/ and see what you get.

 

Thanks

 

Mahomed