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10/06/2026 1:41 AM

CODA56 upload capped at ~40 Mbps on 300/100 plan — possible bootfile/provisioning issue

Hello,

I recently replaced my old Netgear CM500 with a Hitron CODA56. 

My Plans shows 300 / 100 Mbps, Broadband Facts label also shows: Typical download 352 Mbps/ upload 117 Mbps.

However, my actual speed is still approximately 340 Mbps down / 40 Mbps up, essentially the same upload speed I had on the old 300/35 profile.

I checked the CODA56 diagnostics:

  • DOCSIS 3.1 downstream OFDM: locked
  • DOCSIS 3.1 upstream OFDMA: OPERATE
  • OFDMA bandmargin: 0;">I have already power-cycled the CODA56 after my account began showing 300/100, but the upload remains capped around 40 Mbps.

    This appears very similar to this CODA56 case, where the upload was also capped around 40 Mbps and Xfinity found an incorrect bootfile/provisioning issue:

    https://forums.xfinity.com/conversations/your-home-network/upload-speed-capped-at-40-mbps/685ad093bc85175ef3fdb295

    Could an Xfinity employee please check:

    1. The actual bootfile assigned to my CODA56.
    2. The upstream service-flow/provisioning rate.
    3. Whether the modem is still receiving the legacy 300/35 profile instead of the current 300/100 profile.
    4. Reprovision the modem if necessary.

Best Regards,

Anastasia

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