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jimlenz's avatar
jimlenz
Aspirant
Apr 13, 2019
Solved

Netgear AX12 and CM1100 Port Aggregation

Hello,

 

I just received my new AX12 and so far find it an excellent upgrade.  I also have the CM11100 modem and see that both have Ethernet Port Aggregation.  I have 1 gig service with comcast.  Is there a benefit to using the port aggregation on the 2 devices if I only have 1 gig service?  Thanks,

  • I'll dumb it down a bit more for you.

     

    Running a speed test, on a single device, directly connected to your RAX120 can only yield a max speed throughput of ~960Mbps (1Gbps minus overhead).

     

    Running another speed test, on another device, at the same time, directly connected to your RAX120, can yet again, only yield a max speed throughput of ~960Mbps (again 1Gbps minus overhead).

     

    Add the two results together and you should at least achieve 1000Mbps (full 1Gbps Internet connection). If your Internet has been over provisioned, you could see aggregated (pun intended) speeds in excess of 1Gbps. I would expect you'd achieve 1100-1200Mbps.

     

    No matter the results above, if LACP LAG has been optimally implemented in both the RAX120 and CM1100, I'd continue to use LAG between them. You never know if your ISP overprovisions in the future, LAG provides load balancing, failover, etc, etc, etc.

     

    Hopes this helps.

57 Replies

  • some area's do get a bit of overprovisioning. You could run a before speedtest and an after speedtest. If you're seeing a speed increase, leave it. If you don't, I'd run it regular to free up that extra port. The only difference would be if they over provisioned you. Some people have reported they see up to 1.2gbps and some report zero change in speeds. 

    • avtella's avatar
      avtella
      Prodigy
      Link aggregation won’t boost speeds for single clients or streams. It’s cumulative as in multiple streams/devices or connections can take adavantage of the total available bandwidth. So if you are just doing a speed test on a single device you won’t see any gains.
      • jimlenz's avatar
        jimlenz
        Aspirant

        Thanks so much for the responses.  

         

        I have 1 gig and it isnt over-provisioned.  The best I can get on ethernet connected directly to the modem is 968mb.  

         

        Since I cannot get over 1 gig is there a benefit to doing this?  Honestly, I dont understand link aggregation and if there is even a slight benefit would use it.  Thanks.