# \[GL-MT6000 / Flint 2\] GRO on WAN silently corrupts forwarded TCP payloads above ~25 MB/s (fw 4.9.1)

**URL:** <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>\
**Category:** Router\
**Created:** [August 20, 2026, 1:25am UTC](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 "2026-08-20T01:25:53Z")\
**Posts on this page:** 1\
**Showing post:** 11

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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 13, 2026, 9:36am UTC](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 "2026-10-13T09:36:16Z")

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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-silently-corrupts-forwarded-tcp-payloads-above-25-mb-s-fw-4-9-1/70684)._