@David-TP Thanks for the escalation. I have received an e-mail about TKID240234885. I will wait response from your engineers.

@Alexandre. Thanks for the reply. Ookla speed test result only shows ipv6 speed. My issue is only for Ipv4 download speed.

@David-TP Thanks for the reply. Yes. the issue is still occurring... After downgraded to 1.6.2, IPV4 download speed is still slow. 1.6.2 result is as follows; IPV4 Download 1.90Mbps Upload 102.87Mbps...

Hi All, After updating Deco M9Plus firmware from 1.6.2 to latest 1.6.3, IPv4 download speed is extremely slow.. Configuration diagram is as follows. NTT optic fiber ONU |(Cat6 wired) Deco M9Plus...