irule redirection question

I'm sorry. I'm crossing my realities.

For normal browsing (without the LTM or any iRules) then the case does not matter for what the LTM picks up as [HTTP::host].

When you are processing the [HTTP::host] value through an iRule then the case IS sensitive and needs to be put in a known comparative state, so you should use the "string tolower". I apologize for the mistake and confusion.

when HTTP_REQUEST {
    switch -glob [string tolower [HTTP::host]] {
        "www.website1.com" { HTTP::respond 301 Location "http://www.google.com" }
        "www.website2.com" { HTTP::redirect "http://www.yahoo.com" }
        "www.website3.com" { pool website3pool }
    }
}