SharePoint sites redirect

I have only one sharepoint 2007 site collection https://abc.com/sites/sitecoll1 . we upgrade the site to a different 2010 webserver and the site collection url ishttps://xyz.com/sites/sitecoll1 Iwant to redirect users who type inhttps://abc.com/sites/sitecoll1 to https://xyz.com/sites/sitecoll1 also any users going to old subsites https://abc.com/sites/sitecoll1/subsite1 should be redirected to https://xyz.com/sites/sitecoll1/subsite1. Any ideas?