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Forum Discussion

4estOC's avatar
4estOC
Guide
Jan 08, 2020

CM1200 to Rax200 WAN aggregation slows down (requires reboot)

I have a CM1200 modem and RAX200 Router with WAN agreggation (2Gig). My internet speeds slow down to 25Mb after approx 24 hours. Rebooting the router fixes the issue for another 24 hours and then the...
NVRSAWM3CMNG's avatar
NVRSAWM3CMNG
Tutor
Jan 16, 2020
Same problem here. Disable link agg and speeds return to normal with consistency.
It’s apparently going to be an issue until the next firmware upgrade.
branchbiker's avatar
branchbiker
Apprentice
Feb 09, 2020

I have a RAX80 with the CM1200.  Same issue, it slows down to 30Mbps after sometime and have ot reboot.  In addition when link aggregation is setup, xfinity speed tester reports lower speeds than when it is disabled.

  • Topology's avatar
    Topology
    Virtuoso
    Feb 09, 2020

    I too am seeing a decrease in download speeds when WAN Aggregation is enabled between a RAX120 router (1.0.1.114) and a CM1200 modem (1.02.02) with 1000Mbps service from Xfinity, as measured by the Internet Speed test on the Nighthawk App (2.4.19.1).

      • behshad's avatar
        behshad
        Tutor
        Sep 25, 2020

        Still roubleshooting the issue (3 months now). Don't use Link Aggregation basically changed everything (coax cable, ethernet cable, etc.etc.)

         

        However, I did notice the firmware on CM1200 (Comcast) got upgraded to V3.02.01 this morning.  Looking for release notes for V3.02.01 and not published on NetGear yet. 

  • Christian_R's avatar
    Christian_R
    NETGEAR Employee Retired
    Feb 12, 2020

    Hello,

     

    For those experiencing issues with WAN aggregation and is interested in helping us look into this further, please send me a message. Please provide me with your contact information such as name, email, phone, and contact time along with your serial number. 


    Thanks,

    Christian 

    • plemans's avatar
      plemans
      Guru - Experienced User
      Feb 12, 2020
      I've got the RAX200 but not the CM1200 or I'd help out.
      Good luck! Christian_R
      • sherri1963's avatar
        sherri1963
        Star
        Feb 25, 2020

        Mine did the same, 20-25mbps until I ran speedcheck couple of times... These routers have great internals but without alof of firmware work their going to fail market wise.  I'm contemplating taking this back for the GT-AX11000 right now...

    • branchbiker's avatar
      branchbiker
      Apprentice
      Feb 12, 2020

      I will PM you now.

    • branchbiker's avatar
      branchbiker
      Apprentice
      Feb 16, 2020

      Case #42302140 was created and escalated to engineering.  I ran a multitude of tests.  Once thing I can't figure out is how to acces the hidden debug logs on the CM1200.  That might gleem some light on why speeds slow down after a few ours.

       

      Another intresting thing to not is that without aggregation, speeds are 930Mbps.  Immediately after setting up LACP, speeds drop to 650Mbps.  Then as everyone notes, speeds can drop to as low as 20Mbsec after 24 hours.

      • 4estOC's avatar
        4estOC
        Guide
        Feb 16, 2020
        I actually get up to 1,200mbps (xfinity gigabit) with WAN aggregation immediately after reboot. This lasts for a few hours, until it drops to about 25 mbps. I get only 700mbps with a single WAN port . But, if repurposes then 2.5gb lan Port as a wan port, I get around 960mbps and it’s stable. And QoS works too (best option so far)
        WAN LAG = 1,200mbps (but decays over 24 hours)
        1gig Wan ≈ 700mbps (stable but underperforms)
        2.5gig LAN configured as WAN = 960mbps (best option so far)