F5 URL to Different URL irule

yogipd I believe the following is what you're looking for. Your first statement about abc.com changing to xyz.com seems a bit off. Did you mean to say that anything going to abc.com you want to redirect to xyz.com or is it only a specific path? Assuming the answer to my questions isn't yes, then the iRule below should work.

when HTTP_REQUEST priority 500 {

    if {[HTTP::host] == "abc.com"}{
        if {[string tolower [HTTP::uri]] == "/<PATH>"} {
            HTTP::redirect "https://xyz.com[HTTP::uri]"
        } elseif {[string tolower [HTTP::uri]] == "/ibsc/rrr/logon/login.jsp"}{
            HTTP::redirect "https://xyz.com[HTTP::uri]"
        }
    }

}