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Forum Discussion

Pokemaniac's avatar
Pokemaniac
Aspirant
Jul 12, 2019

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...
Troubleshooting
Pokemaniac's avatar
Pokemaniac
Aspirant
Jul 13, 2019

It's pretty consitently reproducible to me.  I had to turn off link aggregation so I wouldn't have to reboot the modem every other day or so.

 

My ISP is RCN.

 

I'm fairly certain that rebooting the router did not help, only rebooting the modem fixed it.

 

I'm not 100% sure how long it takes to manifest, since it would frequently start happening while I was asleep or at work, but it is definitely greater than 24 hours, and less than 48 hours.

 

vkdelta's avatar
vkdelta
NETGEAR Employee Retired
Jul 13, 2019

and you just let the modem run as-is with regular internet use.. Nothing special.. Is that correct?..

 

will check it on our side.

  • Pokemaniac's avatar
    Pokemaniac
    Aspirant
    Jul 13, 2019
    I may have brought up the Connection Status and Event Log pages once or twice, but that was mostly after it had slown down to see if I could find any obvious problems (I couldn't). Definitely at most I may have looked at the a few of the pages in the modem's browser UI without changing any settings.

    Also while I'm thinking about it, I think I checked the Link Aggregation setting while it was slow once, and it reported Link Aggregation as disabled even though it was seemingly active. That may be related.
    • schumaku's avatar
      schumaku
      Guru - Experienced User
      Jul 15, 2019

      vkdelta ... have asked AbhayB in another thread already: 

       

      Is there a common aggregation mode "standard" agreed between the makers of cable modems and routers? Asking because when we check Asus that they talk of dynamic 802.3ad/LACP for WAN port aggregation - while Netgear does not show any trace on the aggregation mode implemented - neither on the cable modems, nor on the routers supporting WAN aggregation. More than poor and non-professional documentation, poor KB entries, ...