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Forum Discussion
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 just got off of the phone with support about my new CM1200 connected to a RAX80 router and was told that the additional ports on the CM1200 are useless and cannot be used if port aggregation is used. I am getting the same slowdown plus if you do not have multi-gig web service that the port aggregation will not work and that it is acting properly in choking off the internet speed because it is cheating to try to get a higher speed than for what you paid.
So Netgear WAN aggregation from router to modem is useless.
I really like this modem but with my ISP being Suddenlink I am not sure they will ever have an update for this modem. I will go get the Moto 8600 as it will do the aggrigation without issues.
I wish that you could update the firmware as we buy these our self.
Since I originally posted about my CM1200 link aggregation performance degradation I have found that performance can be restored without a power cycle or modem reset. Performance can be restored by a link disable / enable. This can be done by disconnecting and reconnecting one of the Ethernet cables or by disabling and enabling one of the switch ports that the CM1200 is connected to. When I take either of these actions full performance is immediately available. Then after another two to four hour time period performance will again be severely degraded. Repeating the change of port state will again restore performance. The change of port state to restore performance can be done on either of the connected ports.
From my testing a down/up of one of the connected ports has restored performance multiple times, but each time performance degrades after two to four hours. The only result of my testing that I did not expect was that when in degraded mode if I disabled one port and left it disabled, performance was restored to what one would expect in a non port aggregation mode. However, again after two to four hours performance degraded. I then had to down/up the port that was active to restore performance.
In terms of degradation my download speeds drop from 1150 Megabits to 20 to 25 Megabits. My upload speeds drop from 40 Megabits to 20 to 25 Megabits.
I have an open case with Netgear support on this problem.
Thanks for the quicker fix! Can confirm that this works, so you don't need to always reboot. I wish Netgear would acknowledge this or push out a firmware update. I'm considering returning this modem before my return window is up and buying one of the many other modems mentioned in this thread that work with WAN Aggregation and do not have slowdowns after 2-4 to 24-48 hours.
