gure proxies to send trace spans to them automatically.
See <a href=../zipkin/>Zipkin</a>, <a href=../jaeger/>Jaeger</a> and <a href=/v1.14/docs/tasks/observability/distributed-tracing/lightstep/>Lightstep</a> task docs about how Istio works with those tracing systems.</p><h2 id=trace-context-propagation>Trace context propagation</h2><p>Although Istio proxies are able to automatically send spans, they need some hints to tie together the entire trace.
Applications need to propagate the appropriate HTTP heade