ScratchMonkey's profile

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42 Messages

Wed, Aug 4, 2021 5:28 PM

Does my modem have Active Queue Management (AQM) for low latency?

According to my account page, I have an ARRIS Group, Inc. TG1682G. Xfinity is testing AQM firmware (supporting DOCSIS-PIE) on more recent modems and found a huge improvement in latency, which is critical for responsive gaming and other interactive apps. Is my modem in this group or do I need an upgrade? I'm told an XB6 or XB7 would work, but I can't figure out how to determine if I have that. 

Here's the research paper with the testing: https://arxiv.org/abs/2107.13968

From the paper:

10. Latency Measurement Results
As explained earlier, for two variants of XB6 cable modem gateway, upstream DOCSIS-PIE AQM was enabled on the CGM4140COM (experiment) variant but was not available on the TG3482G (control) variant during the measurement period. The TG3482G variant used a buffer control configuration that predated AQM in DOCSIS.

See also here: https://lists.bufferbloat.net/pipermail/bloat/2021-July/016566.html

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EG

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89.1K Messages

1 m ago

FWIW, the 1682G is an XB3 model.

Contributor

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42 Messages

1 m ago

Thanks! How can I get that upgraded to an XB6 or XB7?

For lurkers, I found this feature comparison: https://internet-access-guide.com/xb3-vs-xb6/

EG

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89.1K Messages

@ScratchMonkey

The fastest way would be to swap it out at your local Comcast store. 

I am not a Comcast Employee.
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Contributor

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42 Messages

1 m ago

I found a better comparison: https://www.xfinity.com/support/articles/broadband-gateways-userguides

Note that my speed is fine. I want the latency-controlling capability of the later firmware. The smaller number of ports is fine as I'm using an external switch.

EG

Expert

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89.1K Messages

@ScratchMonkey

I was going to post that earlier but I didn't think that it was necessary since you had already mentioned the XB6 & the XB7.

I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.

Was your question answered? Please mark an Accepted Answer!tick

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