F5 Content Switching

Hello,

I'm combining a couple of iRules but the below seems a possible solution. Anyone viewing, please feel free to make corrections. As I have not done this before, I am not sure how the F5 handles redirecting to the virtual, whether it's a 301/302 or transparent.

when HTTP_REQUEST { 
    switch -glob [string tolower [HTTP::host]] {
        "www.mycompany.com" { virtual virtual_server_A }
        "email.mycompany.com" { virtual virtual_server_B }
    } 
}