@SrDarkWarrior It's better wait for TPLink to realise it for everyone. I just send them an email to inform everything is OK.

Hi guys, I was in easter holidays. Tplink support send me a m9 plus firmware version 1.6.1 and everything is OK. Tested now. I get full bandwidth from my ISP.

@xQuantum Support call me by mail They suggest to change cables, I did that, no success, and also to give a try changing the main deco with new cables, also with no success. After that I downgrade...

@David-TP Hi David, E-mail sent to support with my configuration. I use vlan tag 12, MEO Portugal ISP. I don't downgrade for now and wait for support email feedback. Thanks in advance

@pvdven Yes. But upgrade again today, the oficial 1.6 0 and tomorrow I will downgrade again.

Hi I will downgrade again to fw 1.5.6 . I lost half of bandwidth with fw 1.6.0 Thank you guys for everything