: foo.prod.svc.cluster.local
        subset: v2
  - name: &quot;default&quot;
    route:
    - destination:
        host: foo.prod.svc.cluster.local
        subset: v1
</code></pre><table class=message-fields><thead><tr><th>Field</th><th>Type</th><th>Description</th><th>Required</th></tr></thead><tbody><tr id=RequestAuthentication-selector><td><code>selector</code></td><td><code><a href=/v1.18/zh/docs/reference/config/type/workload-selector/#WorkloadSelector>WorkloadSelector</a></code></td><td><p>Optional. 