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Forum Discussion
TONEHZ
Jul 27, 2021Guide
CM1200, Asus AX-86U & Comcast 1.2Gb internet
Issue: I've got comcast 1.2GB speed, provisioned 1400Mbps and I want to take full advantage of what is paid for. Currently getting 940mbps.
Equipment:
CM1200 modem.
Asus AX-86u router.
Currently 1Gb intel ethernet chipset on pc motherboard, upgrading to 2.5Gb Asus Ethernet lan card.
Cat6a patch cables.
Question: How can I get this to work or is it already working?
Method: I've got Ethernet Port Aggregation turned on the CM1200 and have 2 cat6a cables going into my Asus router from its 1 & 2 ports... The asus router has WAN aggregation turned on and instructs to plug the cables into the 1Gb wan port and Lan port 4.
I would then use the 1 mixed 2.5G wan/lan port and plug that into my 2.5Gb asus ethernet card and get the full speed.
Notes: The network card is currently in the mail, wont be afraid to return if this experiment doesn't work. I do not get anything more than 940mbps currently as I think its limited do to my motherboards lan chipset.
Anything else wrong here, do I just need the network card? Or am I forced to get a new modem with 2.5G ports or even a new router as well?
- ^ for sure, rest assured the modem was restarted many times and so was the router, being left off for periods of 10 minutes or more. I want to point that out so the issue isn’t downplayed into me just not letting the modem lose power. I also got a new CM2000 modem and that should have been correctly configured with the provisioned speeds but still limited bandwidth to 940mbps, nothing was changed on the router. I’ve had gigabit service for years and the 1200mbps has been available in my area for months now while I’ve been receiving 940mbps, of course I didn’t have aggregation turned on so I wouldn’t have noticed but even when I did it didn’t work until the main tap cable lines were messed with. Of course it could also have been during that downtime when the line was messed with it was the sufficient time needed to reprovision the modem but I highly doubt that to be the case, a new modem rules that out, so do the numerous power outages that would have reprovisioned the modem during the months I’ve had the 1200mbps service. Such an odd issue. If anyone struggles, definitely leave modem and router devices unplugged for atleast 5 minutes to rule them out and to check your main cable lines directly from the tap. In the very end it’s most likely I just wasn’t provisioned correctly and the Comcast reps couldn’t tell otherwise.
12 Replies
- FURRYe38Guru - Experienced User
Techincally the CM1200 max rate is 1000Mbps on all RJ45 ports. So WAN to LAN you'll not see much over 900Mpbs. I've seen 950Mpbs on occasion with mine.
IF LAG is enabled on the CM, then you may get over 1000Mpbs however you'll need a router with LAG support on it's WAN and have LAN ports with 2.5Gb or higher speeds on it's RJ45 LAN ports. If the router Supports WiFi 1733Mpbs on 5Ghz AC or 5Ghz AX modes, then wireless could see over 1000Mbps if your client wifi devices support those rates as well. 4x4 devices are needed for most anything over 600Mbps on wifi.
- TONEHZGuide
Right so, LAG is enabled on the CM and the Asus AX-86U does support wan aggregation. it uses its 1Gb wan port and 1Gb lan port 4, combined to make that happen. It also has a 2.5G lan port which can be used to connect to my 2.5G ethernet card and thus, in theory I should have over 1000mbps. Disregarding wifi as I have no devices capable of more than 700mbps. I guess I will truely know if this will work tomorrow but I am looking for anyone with direct experience with this who can tell me to potentially stop wasting my time and just get a router & modem that directly supports it.. otherwise this is MUCH more cost effective.
otherwise, I'm just looking for a "in theory, that should work fine" kind of answer.
- FURRYe38Guru - Experienced User
Yes if the Asus router has a 2.5Gb LAN port and LAG enabled on both...Let us know what you find out.
My ASUS GT-AX11000 has same. I use it as a wireless client and connect my 2.5Gb supporting PC to it's 2.5Gb port.