How can I find what clients are using TLS 1.0

I use a different iRule that provides some further information in diagnosing issues like this. The other iRule is just as good but depends on the information you want to collect 🙂

when HTTP_REQUEST {

    if { [info exists logged] && $logged == 1 }{
         Do nothing. Already logged for this connection
    } else {
        set logged 1
        log "Rule DEV_CIPHER_logging fired, from [IP::remote_addr] to vip [IP::local_addr] Cipher [SSL::cipher name]:[SSL::cipher version]:[SSL::cipher bits] Client:[HTTP::header "User-Agent"]:[HTTP::host]"
    }
}