one forum 2 domains

[rose123]

I have domains
www.mysite.com and www.myysite.com

Forums are installed on mysite.com, and all other things are installed on myysite.com
You may be thinking I am fool to do this but the reason I did was to avoid server overloading. I have contest running on myysite.com and it is loaded towards the end of the contest. My forums are also busy towards the end of the month.
I am not looking for hosting solutions.
Can I run my forums on mysite.com and at the same time forward the URLS to myysite.com without doing any server or database changes.

[Brandon_R]

Yes you can as long as it's from one database ie one member system posts etc

[Marco van Herwaarden]

I don't really get what kind of URL's would need to be forwarded. Can you give some examples.

[rose123]

I have forums hosted on url www.a.com
Can I run forums on www.a.com and also forward forums to www.b.com
Users can access forums from both domains but accessing only one database.