If you want the original page (the page containing the redirect link) to be refreshed (that is, not cached) you can use a few meta headers:
<meta http-equiv="cache-control" content="max-age=0" />
<meta http-equiv="cache-control" content="no-cache" />
<meta http-equiv="expires" content="0" />
<meta http-equiv="expires" content="Tue, 01 Jan 1980 1:00:00 GMT" />
<meta http-equiv="pragma" content="no-cache" />
If you want the original page to automatically redirect to index2, try inserting the following at the beginning of your <body>: <script type="text/javascript">window.location.href="index2.html";</script>
But that's an ugly way to do it. I suggest looking up 503 redirects for a properly-done (nice to SEO) way.