It seems that MS support people are simply ignoring facts that state the obvious. All these error codes, disconnections and the amount of people affected should be obvious enough for any human being with average intelligence to conclude, that there is something wrong with some of the servers issuing updates.
I can confirm that not all people are affected. Some consoles are most definitely assigned to different update servers (like one of my mate's), therefore it's a first indication that our routers are not to be blamed for this.
Secondly, my system was starting to act weird with updates BEFORE the latest dashboard update was applied, so I don't think that the update itself broke the system, since I have successfully installed it from a DVD disc.
Thirdly, it's not just updates but the whole Xbox Live core functionality, like downloading a profile, marketplace and updates for games themselves and in-game marketplace.
To support people: I know that you have procedures and stuff, but if you could confirm with Xbox Live engineers what's with the servers, maybe we could all ease up on ya', because at the moment you should have already acknowledged that your suggestions are not working in this case.
What you don't seem to understand is the fact that it's not our fault what happened, nor our routers. Like somebody mentioned before me: nobody changes their router settings overnight, and they simply don't reset themselves just like that, because otherwise all connectivity would be affected. Especially torrents, though I can use them like before.
You wanted error codes, hey there is too many to type them here. But I have checked all of them with your support pages and they all tried to blame my connection. Now, I have completely switched off my firewall to see if that helps, but it didn't. I have tried every solution you have suggested on your support pages and other forum threads. Even though I have managed to manually install the latest dashboard update, this didn't resolve my problem with other connectivity problems, especially with downloading my profile and downloading other game updates, like for Battlefield 3.
At the moment, I am unable to use Xbox Live, or even my profile, cause I was supposed redownload it, but it kept failing. Because this is a paid service, I expect you to actually talk to your engineers and find out what the hell is going on, acknowledge your fault and display an announcement on a widely visible page about what is wrong, why is wrong and when we can expect it to be resolved.