overs how to take advantage of this enhancement as the metrics
and labels emitted are conditional on whether the virtual outbound or explicit port/protocol
listener is being hit.</p><h2 id=using-the-augmented-metrics>Using the augmented metrics</h2><p>To capture all external service traffic in either of the cases (BlackHole or
Passthrough), you will need to monitor <code>istio_requests_total</code> and
<code>istio_tcp_connections_closed_total</code> metrics. Depending upon the Envoy listener
type i.e. TCP p