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CM1200 slows down after 24-48 hours of uptime when using link aggregation
If I hook up my CM1200 to my router (an Asus RT-AX88U) in Link Aggregation mode, it seems to be consistenly slow down to only around 66-ish% of the full connection speed after somewhere between 24 an...
I can confirm that your ISP is not the issue. After several days of bouncing around with NETGEAR support (I kept getting bounced between the switch and cable modem teams since both devices are NETGEAR) and hitting up NETGEAR on Twitter, it was clear that they don't consider this a high priority issue. Even IF they do eventually fix this problem, it may take months to roll out a firmware update since your ISP has to push that to your cable modem. Long story short, if you're going to do LACP don't even bother with the CM1200. The fact that a NETGEAR employee hasn't even replied to this thread in a long time confirms to me that they just don't care. I've had great luck with the Motorola MB8600 and I've heard good things about the SB8200 as well. I'm getting around 1.2Gbps with my MB8600 and it's been up so far for almost 10 days. See attached screenshot for evidence.
The thing that gets me is that I assume the CM1200 is just running Linux; the Linux bonding driver has supported 802.3ad link aggregation / LACP for a very long time and is very, very mature. I'm not sure what NETGEAR has done with this firmware to introduce this issue.
- Kenny
kvanals wrote:I can confirm that your ISP is not the issue. After several days of bouncing around with NETGEAR support (I kept getting bounced between the switch and cable modem teams since both devices are NETGEAR) and hitting up NETGEAR on Twitter, it was clear that they don't consider this a high priority issue. Even IF they do eventually fix this problem, it may take months to roll out a firmware update since your ISP has to push that to your cable modem. Long story short, if you're going to do LACP don't even bother with the CM1200. The fact that a NETGEAR employee hasn't even replied to this thread in a long time confirms to me that they just don't care. I've had great luck with the Motorola MB8600 and I've heard good things about the SB8200 as well. I'm getting around 1.2Gbps with my MB8600 and it's been up so far for almost 10 days. See attached screenshot for evidence.
The thing that gets me is that I assume the CM1200 is just running Linux; the Linux bonding driver has supported 802.3ad link aggregation / LACP for a very long time and is very, very mature. I'm not sure what NETGEAR has done with this firmware to introduce this issue.
- Kenny
Good to know!
I'm not writing off the CM1200 just yet; if nothing else I would like to help figure out what the problem is.
It is probably running a paired down version of the linux kernel but just because the driver is mature in x86/x64 does not mean that it is simple plug and play with their hardware. I am sure there is a significant amount of optimization that is required to get it to run on their hardware. I would venture a guess that their CM is using an ARM processor or it is running a RTOS (Real-Time OS) that while it does use a lot of the code they can't just dump the entire linux kernel and drivers on the CM.
Well, after two support tickets (since both my switch and modem are/were under warranty and had online and email support still) and getting bounced around, I lost faith in trying to solve the issue with NETGEAR. And honestly, that's your only hope since you can't fetch the firmware binary blobs yourself and even if you could AND had the means to unpack them, there's no way to load the image onto the device yourself if you or someone else was able to figure out what the issue is. As far as the OS on the device, it is certainly only conjecture at this point, but if it indeed is Linux I'm not sure what permutation of hardware configuration would lead them to develop their own LACP driver, even on a non-x86/x86_64 architecture like ARM/AARCH64/MIPS/etc.
To be honest, the only reason I'm still replying to this thread is that I'm salty that nobody at NETGEAR has even acknowledged that this is clearly an issue with an advertised feature and I'm hoping that keeping the thread alive will get it noticed. (Which would definitely help you if you're staying on the CM1200 bandwagon.)
- Kenny
- You know this thread is pretty funny. I gave my suggestion and what to do to get the situation fixed and nobody has yet to reach out and try mine solution. I've done it my ship works I get one gig download speed constant no problems ask in no issues or resetting every 12 hours or every day. Quit thinkin it's your modem and router and try the simple fix I did simple enough
CGASTON: The simple fix of calling Comcast and yelling at them for no reason? You've yet to provide at least a screenshot showing the uptime of >48 hours, the firmware version is what everyone else is on, and showing that LACP is indeed active. It's not even clear what Comcast actually did for you. With multiple ISPs across multiple locations at play, I'm not sure why you're so quick to blame the ISP and not hold NETGEAR accountable. Trust me, I would have liked to have actually fixed the issue myself rather than swap hardware, which resolved my issue finally.
- Kenny