I had connected Deco M5 directly to the ONT box and all was working fine for several months.  Then the internet connection had a problem and I had to reconnect to Vodafone router to resolve the issue.  After it was sorted, I connected directly to the oNT box but Deco no longer seems to get the internet connection (all works fine if I use Deco with Vodafone router). 

Looks like some settings may not be correct but I am not sure what to try.  Would appreciate your help in getting this resolved as I do not want to use Vodafone router.