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Several users reported that IPv6 would work for 24 hours and then fail on v3.20. The latest firmware (builds ending in _20240911 or newer) resolve the DHCPv6 renewal issues with ISPs like Comcast, Jio, and BT.
TP-Link doesn't usually provide poetic release notes, but based on the latest builds (as of late 2024/early 2025), here is what the updates generally fix or add: tp link archer c6 v3.20 firmware
The burning question for enthusiasts: Can I install OpenWRT on the Archer C6 v3.20? Several users reported that IPv6 would work for
The short answer: Limited support, not recommended. Verdict: Stick to stock TP-Link firmware for v3
While the Archer C6 v2.x (Qualcomm) has excellent OpenWRT support, the v3.20 (Realtek) is a different beast. Realtek drivers are proprietary and harder for open-source communities to support.
Verdict: Stick to stock TP-Link firmware for v3.20. If you need OpenWRT, trade your router for a v2.x or buy a different model like the C6U or Xiaomi AX3000T.
