Irule to redirect all URI from old site to a new site with matching URI

There are lots of redirect examples on DevCentral, but here is a simple iRule that should work.

when HTTP_REQUEST {
    if { [HTTP::host] equals "www.universitysite.com" } {
        HTTP::redirect "https://newsite.com[HTTP::uri]"
    }
}

This can also be done more efficiently with a Local Traffic Policy than with an iRule. The condition would look something like this:

HTTP Host full string is any of at request time

The action would look something like this:

Redirect to location tcl:https://newsite.com[HTTP::uri]

See this answer for more details.

You could also do it this way:

when HTTP_REQUEST {
     if { [HTTP::host] equals "www.universitysite.com" } {
        HTTP::respond 301 Location "new-site.com[HTTP::uri]"
    }
}

Just modify the if statement to cover the scenarios you want to perform the redirect on.