# GL-MT6000 (Flint 2) – GRO on WAN corrupts forwarded TCP traffic (same driver issue as Beryl AX?)

**URL:** <https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-corrupts-forwarded-tcp-traffic-same-driver-issue-as-beryl-ax/72062>\
**Category:** Router\
**Created:** [October 14, 2026, 11:53am UTC](https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-corrupts-forwarded-tcp-traffic-same-driver-issue-as-beryl-ax/72062 "2026-10-14T11:53:32Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![will.qiu](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/w/b38774/32.png) [@will.qiu](https://forum.gl-inet.com/u/will.qiu)\
**Post date:** [October 15, 2026, 9:55am UTC](https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-corrupts-forwarded-tcp-traffic-same-driver-issue-as-beryl-ax/72062/3 "2026-10-15T09:55:10Z")

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Hi,

Thanks for your report. Please see the following post for our latest update on this issue:

> [@\[GL-MT6000 / Flint 2\] GRO on WAN silently corrupts forwarded TCP payloads above ~25 MB/s (fw 4.9.1)](https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-silently-corrupts-forwarded-tcp-payloads-above-25-mb-s-fw-4-9-1/70684/11):
>
> Hi, Thank you for the detailed report and testing. We have reproduced the issue locally, so we do not need your script at this time, although we appreciate the offer. Since the issue involves the mtk-eth driver, it may be difficult to fix. However, there appears to be a relevant upstream commit, and we are checking whether it can be integrated and whether it resolves the issue.

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_[View the full topic](https://forum.gl-inet.com/t/gl-mt6000-flint-2-gro-on-wan-corrupts-forwarded-tcp-traffic-same-driver-issue-as-beryl-ax/72062)._