Instruct: Classify the given review into positive or negative sentiment.
Query: Crashed during configuration

I read the manual and was initially impressed with how much was included (the descriptions of how the internet works, the roles of routers and firewalls, etc.). I started the configuration process which seemed very easy through the web browser. When I attempted to save and restart the router (a necessary step), I lost all communication with the router. I tried everything (and at this point I found out how lacking the documenation really is-- How do you use the console port? How do you upgrade firmware if the ethernet connection doesn't work?). After talking with DLink tech support on my dime, I was told I would need to return the router for a new one.