5 minute test focus ALL
5 minute test 30 second focus
Here are the 2 images you requested I hope I did everything correctly. I'm guessing I shoud run the same test again when my internet decides to fail correct? or was I only to do this test when I was experencing internet issues.
Thanks again
P.S. I'm not sure how to tell if the tech was contracted or a real Rogers tech
@Bromoran, reviewing your image posts, I see what you mean when you indicated a difference between the lower and higher frequencies. When your modem is operating on the lower frequencies, your signal levels are good. The downstream signal levels are within a 2 to 3 dBmV range which is what I would expect. When the CMTS shifts the modem up into the upper frequencies, the highest frequencies exhibit a signal level roll-off and drop about 13 dBmV. The DOCSIS 3.0 limit for a signal slope is 12 dBmV, so that limit is broken. Rogers might use a different limit, not sure at this point.
The other item to note is that when the frequency shift upwards occurs, your signal levels which start at 615 Mhz drop by about 1.5 dBmV. As the frequency increases, those signal levels do pick up to previous levels, and then drop right off at the end, dropping 13 dBmV. For some reason the CMTS is forcing your modem to operate at the higher frequencies, and my guess is some type of noise on the network or a cable condition is causing the CMTS to react. I suspect that your modem isn't the only one forced up into the higher frequencies. That upwards shift would be an automatic reaction and there isn't anything that you can to prevent that. The CMTS is most likely reacting to that noise or cable condition and simply moving the connected modems to some frequency set where both CMTS and modem are reasonably happy and can continue to operate. The roll-off at the higher level is somewhat mystifying as both CMTS and modem are capable of operating at those frequencies.
So, don't change modems. This isn't a modem issue from what I can see.
When the modem is operating in the upper frequency range, what do you see at your end that tells you that? Are you seeing a slowdown in data rates, or other effects, and if you have Rogers Cable or Home phone, do you see any effects on those as well?
You pingplotter images are actually pretty good. The high MAX times are most likely due to the Casa CMTS - Hitron modem issue that the engineering staff are working on. Were those plots taken when the signal conditions were good, or bad? Just want be clear on that.
To narrow down the display on pingplotter, when its up and running, right click on the line 2 IP address and select the 2nd choice in the pop-up menu to copy the IP address. Paste that into the address bar, then select the down arrow on the right hand side of the address bar to bring up the drop down menu, select "Reset and Restart". Now you're pinging the CMTS only, so the bottom display will display only the data to and from the CMTS, which is what we're concerned about. Select 5 seconds for the Focus time and right click on the bottom display to select the time frame of your choice. You can scroll back and forth on the bottom if you select a time like 5 or 10 minutes and have left pingplotter running beyond the selected time. If you do have any packet loss occurring when you notice the high frequencies in use, that should show up in the bottom display. Unless its an ongoing condition, it would not remain indicated at the top as you have 5 seconds selected for the Focus time.
I would encourage anyone using pingplotter for the first time to play around with it and explore the right click menu choices.
If I remember correctly you have 100 Mb/s unlimited. If thats correct you could just leave pingplotter running so that you can scroll back thru the history on the bottom display. If you have no packet loss, what you will see should resemble the images in the first two to three rows of my image library, which illustrate the Casa CMTS to Hitron modem latency issue. In my case I don't have any packet loss, just an ongoing series of high time pings to the CMTS.
http://communityforums.rogers.com/t5/media/gallerypage/user-id/829158
What you could do for starters is call tech support and ask the CSR to look at the noise history for your modem and your neighbors. Explain what your seeing in terms of a frequency shift between the lower and upper frequencies and also indicate what you are seeing in terms of effects on your internet, cable and / or home phone services. You never know what will turn up unless you ask the question. Then, if and when you see that your modem is back on the upper frequencies, and you see the same signal levels as you have posted, start pingplotter if isn't already started so that you can see the modem to CMTS path displayed and call tech support. Advise the CSR what is going on, (it might not be indicated in the notes on file) and ask him or her to run a modem signal check, and look for packet loss and noise, and check your neighbors as well. If you have packet loss indicated on pingplotter, the CSR should be able to detect that as well I'd be interested in knowing if you see any packet loss with pingplotter.
Ok, that should do it for now. Please keep posting.....
Not sure if you wanted me to post this
Here is the Pinging CMTS 10 minute Focus 5 seconds Aug 21st (modem using lower frequencies good internet)
I will post more pingplotter data when and if my modem decides to switch back to the higher frequencies and my internet starts failing.
Thanks so much for your help @Datalink you're the real MVP
My Internet was acting up yesterday so I took some screenshots / pingplotter data for you to look at
First image is modem still using the lower frequencies signal strengh numbers much higher then they normally are as well as lower signal to noise ratios accross all frequencies (usually all 37 on lower frequencies) http://i.imgur.com/KPdswUm.jpg
Shortly after modem switched to the higher level frequencies. Still had high signal strength numbers but signal to noise numbers were more in line with what im used to seeing on those frequencies http://i.imgur.com/frfkm8f.jpg
Here is pingplotter image Pinging Google.ca 6 hour test 30 second focus ( modom using high frequencies)
I'm still not 100% sure on how to read this but i'm guessing the red lines throughout the graph are bad. Are the red lines packet loss?
Thanks again
Hi @Bromoran
I think we should troubleshoot this one further. Please PM us @CommunityHelps and we will troubleshoot!
RogersCorey
Yup, the red lines are packet loss. Given the problems that you're having, can you do this. Instead of pinging google or somewhere else, ping the CMTS so that we can see the performance of the modem to CMTS path. To do that, right click on the IP address in line 2. Select the 2nd option to copy the IP address and then paste that into the address bar and restart the ping test. Now you're pinging the CMTS only. So, the question at this point is whether or not you see any packet loss occur between the modem and the CMTS. Running pingplotter in this fashion will separate any downstream network issues and keep the data focused on the modem to CMTS path for now.
Your signal level images are pretty odd. There is either something wrong with the CMTS or there is a fault somewhere between the CMTS and the modem. The signal levels shouldn't be bouncing up and down 10 dBmV. They should be flat, across the board and grouped around 0 dBmV.
Hopefully @RogersCorey can do some meaningful troubleshooting and get the ball rolling. In the mean time, if you can run the pingplots between the modem and CMTS that would be useful to see.
Here is a 2 plus hour test pinging the CMTS only
Packet loss occued 2 times from what I can tell
Yup, exactly. Thats not looking too bad at this point. I'd be interested in what it looks like when you have problems on the go.
Very good !! This is a perfect example of what I'm looking for, a two hop plot, modem (IPV6 address removed) and CMTS, looking for any signs of packet loss, and, voila, here it is, as shown on the bottom portion of the plot. Very good indeed. This is a great example of packet loss on the modem to CMTS path which is caused by either cable noise or cable condition of some type. That packet loss will kill any traffic that has to go beyond the CMTS or return back to the modem.
The trick at this point is to get on the phone with tech support when you see that it has started (speed dial plus option 2 for tech support I believe), and have tech support ping the CMTS from the modem and just stay on the line for a few minutes when that runs. If you can see the packet loss with Pingplotter running, then tech support should be able to see it as well. The question at this point is, "Is this a singular line issue, as in your cable feed, or, is it an issue for your neighbors as well" If its a neighborhood issue, that points towards a noise issue or a cable issue between the neighborhood node and the local tap which sits very near your home. Ask the tech to check the current line noise and noise history to see what turns up.
Is this occurring when the CMTS is using the higher frequencies?
Good morning @Bromoran,
Once the work order for maintenance in your area has been completed, this issue should be resolved.
I apologize for any inconvenience but we are aware of the issues in the area.
RogersCorey
Unfortunately I don't have a date that I can share at this time. Once again, I do apologize.
RogersCorey
Hi @scratchieepants,
Customer Relations doesn't have a direct number. You have to request to be transferred to them.
Rogerscorey
@346 that first hop time is pretty ugly. Are you on an unlimited plan? If so, what I would suggest is to download pingplotter and set it to run a 1 sec intervals, maybe even 0.5 sec intervals, pinging the CMTS which your modem connects to. Pingplotter will run in Pro mode for 14 days before it kicks down into freebie mode. You can buy a standard, or even Pro licence if you choose. Standard is fine as it allows you to see data over 48 hours although it will collect data over 7 day periods (?). Not sure if it goes beyond 7 days. In any event, what you're looking for is excessive latency, when it occurs and for how long. If you get into a time period where the latency is excessive, call tech support and after advising the CSR what the problem is, ask him or her to ping the modem from the CMTS or ping the CMTS from the modem while you are doing the same with pingplotter. When you see a huge ping time with pingplotter, the CSR should see that as well. From there the CSR should be able to look at other modems connected to the same tap to see if this is a common problem or if its only your modem that is suffering from the problem. Hopefully, being able to cue the CSR to look at this when its occuring will start the ball rolling to resolve the issue.
Is this seen via ethernet, or are you seeing this via wifi? If its via wifi, make sure that you run the test via ethernet.
Here's a link to a post explaining how to set up Pingplotter to monitor the Modem to CMTS path:
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