Upgraded to 2gb service

@user_noname​

@va2124 - Do you actually have an Arris branded device or an Xfinity's XFI ADVANCED GATEWAY (XB7) ?

The Arris TG4482A is not on The List of approved BYOM devices for the "Next Gen Speed Tier", and it looks like it's not on their list at all.

https://www.xfinity.com/support/devices/

Well, it was supplied by Xfinity, but that's how the modem identifies itself when you log in to it.

I don't know how you got to the web page you specified … AFAICT, CGM4331COM isn't on the list of approved modems either.

The picture of the XB7 is what my modem looks like - is it capable of connecting to Xfinity's network at 2 mbps - I mean on the DOCSIS side, not the ethernet side (which I know is capable of 2.5 mbps). I think calling this thing capable of 2.5 gbps because it has a 2.5 gbps ethernet port is a bit disingenuous - the real speed bottleneck is probably on the Xfinity network side.

It's currently in bridge mode connected via 2.5 mbps ports to my Netgear Orbi RBR850's WAN port on a high speed ethernet cable. When I speed test out of the RBR850 I get 1480.76Mbps/92.46Mbps after a modem reboot - this eliminates my network as the speed bottleneck.

This tells me that the provisioning has already gone through (see the uplink speed), but the modem can't handle above 1.5 gbps speed on the connection to the Xfinity network.

What do you think?

-- Thanks, Verne

@va2124 - Sounds like you have Xfinity provided XB7 Gateway, (and the list of approved modems is for BYOD or what Xfinity calls COAM),

based on their information page XB7 has "Maximum Data Throughput: 2.5 Gbps", and if you think its not good enough for your service, you could try exchanging it at the local Xfinity Store for an XB8. 

Please keep in mind that they don't assign your Cable Modem dedicated bandwidth, it's all shared with your neighbors, but the fact that you are getting the speeds you are getting, I would be happy! 

@BruceW​

Several customers have posted that their gateways don't provide full speed in bridge mode. To check the speed your gateway is getting I'd suggest dropping it out of bridge mode long enough to run their Xfinity app "speed to gateway" test (see https://www.xfinity.com/support/articles/test-speed-to-gateway-xfinity-app).

If that doesn't pan out then you have a provisioning or signal problem. If it reports the expected speed then you'll have to decide whether you're willing to tolerate substandard speeds while in bridge mode.

Well, I finally figured out they're forcing me to do this through my iPhone and I disabled bridge mode and the gateway speed was 1427.8 mbps - and according to Xfinity 118% of my 1200 mbps plan speed.

I suppose this means that the provisioning on my gateway hasn't cleared administrative hurdles yet, but I can't explain why my upload speed has improved from 60 mbps to 92 mbps if that were the case.

Note, however, that the Xfinity speed to gateway almost exactly matches the speed reported by the speed test from the RBR850.

Are you sure that this modem supports a full 2.5 gbps on the DOCSIS side? I find it suspicious that the max speed supported simply matches the speed of its fastest ethernet port.

When I look at the supported devices PDF and the wired download speed column, I don't see any modem which supports more than 2.37 gbps.

Addendum: Never mind - the gateway test from Xfinity shows my current plan as being 1200 mbps/200 mbps. Not sure when, but Xfinity must've changed the upload speed from 60 to 200 mbps somewhere along the line (though why the upload speed is now 92 instead of 200 is a mystery to me).

You'd think that if Xfinity did that somewhere along the line they'd trumpet it from the towers instead of doing it invisibly.

But I guess that means that the administrative hurdle of moving to 2 gbps hasn't completed yet.

@va2124 - just a couple comments:

Xfinity keeps publishing their new/updated Internet tiers in the Network Management Articles

You could see your currently provisioned Internet Plan/Tier after you login into your account [via the website] and click on the Internet link,
or via the Xfinity App under Services (also via the Xfinity App under Account -> Your plan -> Xfinity Plan Details)

@user_noname​

@va2124 - just a couple comments:

Xfinity keeps publishing their new/updated Internet tiers in the Network Management Articles

You could see your currently provisioned Internet Plan/Tier after you login into your account [via the website] and click on the Internet link,
or via the Xfinity App under Services (also via the Xfinity App under Account -> Your plan -> Xfinity Plan Details)

Turns out the order I entered and the customer service rep I talked to didn't put the x2 order through.

Spoke to a another customer service rep and went through a verification process and finally got my plan updated and modem provisioned to the x2 plan (which is actually $6 cheaper than my old 1200 Mbps plan).

Latest speed test from my RBR850 comes in at 2326.57Mbps/78.38Mbps with the Xfinity modem in bridge mode.

Speeds at my computer in my upstairs office haven't really improved, but we are talking about a Wifi 6 mesh system with a dedicated Wifi 6 backhaul radio - I expect that when it gets upgraded to a 6e or 7 system the throughput will increase due to better use of 5ghz spectrum on the backhaul radios and an additional frequency band.

I AM limiting radio power because it was assumed that my home isn't large enough - maybe I'll play with that to see if I can improve router <-> satellite speeds.

@va2124 - just for your information the XB8 is wifi 6E, so you might wanna consider swapping for it at the local Xfinity store.