can anyone provide f5 script

If you want to perform a redirect (that is, respond to user-agent with a 302 and a Location header):

when HTTP_REQUEST {
    if { [getfield [HTTP::host] : 1] eq "x1y1z1.xyzglobal.local" } {
        HTTP::redirect "http://x2y2z2.x2y2z2global.local:8080[HTTP::uri]"
    }
}

If you care to redirect only when the uri-path is "/":

when HTTP_REQUEST {
    if { [HTTP::path] eq "/" and [getfield [HTTP::host] : 1] eq "x1y1z1.xyzglobal.local" } {
        HTTP::redirect "http://x2y2z2.x2y2z2global.local:8080[HTTP::uri]"
    }
}

This assumes that this iRule is attached to a Virtual Server listening on port 8080.

If you want to transparently transform the Request-URI (that is, change it before sending it to the pool member, but retain original URL for user-agent):

when HTTP_REQUEST {
    if { [getfield [HTTP::host] : 1] eq "x1y1z1.xyzglobal.local" } {
        HTTP::host "x2y2z2.x2y2z2global.local"
    }
}

Having said all of that, it actually looks like you want to perform a redirect such that if the request is for then the target is . If this is the case, then the trick is, of course, the extraction. Assuming that the pattern is strictly x1y1z1.xyzglobal.local (and x, y and z are exactly one digit each), then:

when HTTP_REQUEST {
    if { [scan [getfield [HTTP::host] : 1] "%1d1%1d1%1d1.%3dglobal.local" a1 a2 a3 b] == 4 } {
        if { "$a1$a2$a3" eq $b } {
            HTTP::redirect "http://${a1}2${a2}2${a3}2.${a1}2${a2}2${a3}2global.local:8080[HTTP::uri]"
        }
    }
}

Again, if you want transparent rewriting, then you must use

HTTP::host