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CM1100 Throttle?
Alright, so this has been puzzling me for nearly 6 months now. And for the fifth time I had a Field Tech come to my home to test all of the cables I have already tested at least four times before.
He and I traced it out to be a possible issue in the CM1100 Modem. For whatever reason, his tester (He's an independent contractor working with Xfinity and has some fancy hi-speed tester that was able to look at a whole ton of different features, I watched the screen, pretty nifty.) could not test the speeds coming out of the CM1100. However, we were able to get up to approx. 1398Mbps from the Coax out of the wall.
At my Wireless router -connected to the modem mentioned above - (Nighthawk X6 R8000) we are seeing roughly 300Mbps out of one of the LAN ports as well as through Ookla/Speedtest from my hardlined ( 3ft CAT6 UTP ) desktop (10Gigabit port on motherboard).
The first modem has shown concerning logs and I am unsure how to decipher them, though I can get a general idea about it. I just don't know how to fix the issue. The current modem only shows what I'd assume are only critical issues during the short period it took Xfinity to permit it transmit.
Cables are new. We exchanged the modem at Costco earlier today, it's new. The Router is new (Less than a year old). The coax cables were tested by myself (Used a Klien Tools VDV Scout Pro 3 that I normally used for work) and by whatever tester the Xfinity guy used.
The first modem has shown concerning logs and I am unsure how to decipher them, though I can get a general idea about it. I just don't know how to fix the issue. The current modem only shows what I'd assume are only critical issues during the short period it took Xfinity to permit it transmit.
I'm at my wits end. We pay for Gig speed, yet seem to get barely a quarter of that. Any ideas what to check next? What to do next?
-SynfulPing
The laptop I do have has issues with it's image. So I just went and looked in the Router's settings, disabled the only one I found to be enabled (Access Control), rebooted the router. Ran a Speedtest on my Desktop, getting roughly 800-900Mbps (Within tolerance I do believe.) Oddly, when running the built-in optional speed test on the R8000 itself, it only gets around 300Mbps. Is that normal?
9 Replies
Most likely WRONG PROVISIONING FILE (CM BOOT FILE) sent by Comcast.
Call them and ask if they are sending correct CM BOOT FILE (gigabit one).
Cable modem is plain bridge L2 device and all the speed tier configs are sent by ISP and they control it.
Called Xfinity. Asked the gentleman about this, he verified that it was a correct certificate/file. He rewrote the file and restarted the modem. No positive result with the same issue.
Is may be possible from what I am seeing in the forums here that the CM1100 may just be faulty overall as a model.
My anticipated next steps will be to test the connection results with an Xfinity Modem, if there's a difference in the speeds, I will look into upgrading to a CM2000 and see if that changes anything.
You put what your speeds are coming out of the router but what speeds do you get with your pc directly connected to the modem?
And how are you testing? (sites/apps/etc)
We (The tech and I) tested the speeds from the coax coming out of the wall (Approximately 1398Mbps), his test device (Dunno what the testing device was, but it was similar to my VDV scout, barring likely more technical) couldn't pull data or anything from the modem, at all. However he could pull roughly 300Mbps from a LAN port on my Router.
My computer has similar results (Testing using Ookla (Speedtest.net), as mentioned above.) 200-300Mbps
SynfulPing wrote:
We (The tech and I) tested the speeds from the coax coming out of the wall (Approximately 1398Mbps), his test device (Dunno what the testing device was, but it was similar to my VDV scout, barring likely more technical) couldn't pull data or anything from the modem, at all. However he could pull roughly 300Mbps from a LAN port on my Router.
My computer has similar results (Testing using Ookla (Speedtest.net), as mentioned above.) 200-300MbpsI'm wanting to know the speeds directly from the modem. The CM1100 has 2 ethernet ports but with the way xfinity provisions, only 1 device can be connected at a time. So unhook everything from the cm1100. power it off and wait 2 minutes. Then connect a pc/laptop (powered off) directly to port 1 on the modem. power on the modem and give it a couple minutes to fully boot. Then power on the pc.
Then test the speeds directly from the modem without a router connected.
What speeds do you get.
