Navigate to page with content displays page not found error
You need to have some sort of content assigned to the URL url1. The simplest way would be to create a new Basic page node and set its URL alias field to url1.

By the way, what you are seeing now is the "page that is displayed when no other content matches the requested document" (Administration &gt;&gt; Configuration &gt;&gt; System &gt;&gt; Site Information &gt;&gt; Default 404 (not found) page). You can have a specific page assigned as your Page not found page, or Drupal will build the content for it on the fly, and show it using the most appropriate template in your theme (most likely page.tpl.php).