Let me start by saying that I have already read the sticky on DNS errors, and the microsoft technical page! However, after going through all the suggested fixes I believe it is probably something else (though I have no idea what)
This problem started a couple of weeks ago, the Xbox would sign out of LIVE - I'd go through the network test as usual, but now it gets stuck between connecting to the router and connecting to the internet, citing a "DNS Error". No matter how many times I reset the router, Xbox, connection settings, manually entering DNS server setting from other computers connected to the same router, it would not work. But a few days later, it magically starts working again with no input from me whatsoever.
This has happened about 5 times now, and being shut out of xbox LIVE for days at a time is seriously annoying!
Xbox: Slim 250gb.
My ISP is Virgin Media, using a standard NETGEAR router they provided. This house has a lot of devices connected to the router simultaneously, other consoles, phones and laptops mainly.
Xbox is right next to the router, problem still persists even with an ethernet cable plugged in, only started happening in the last month or so.
ERROR STATUS REPORT:
W: 0000 - 0021
X: 0000 - F001
Y: 0000 - 0000
Z: 8015 - 1904
ID 0002 - 0002
L: 8015 - 1000
Q: 8007 - 0435
D: 18.104.22.168, 22.214.171.124