anchor.diff:  
   Target the API endpoint of your deployment with `cf api` and log in with `cf login` before performing the procedures in this topic. <%= vars.api_endpoint_book %>
   
  +
   ## <a name='overview'></a> Overview
   <% if vars.platform_code == 'CF' %>
   
  
positive.code:       * Placement tag as `persistent_isolation_segment`
          <p class="note"><strong>Note:</strong> When you use the cf CLI, the name of the isolation segment corresponds to the placement tag you specify in the operations file. The commands throughout this topic use <code>SEGMENT-NAME</code> as an example isolation segment name.</p>
  
  1. Apply the custom operations file when you deploy <%= vars.app_runtime_abbr %>:
  
      ```
      bosh -e BOSH-ENVIRONMENT -d cf deploy cf-deployment/cf-deployment.yml \
  
negative.code:     ```
  
      Where:
        * `BOSH-ENVIRONMENT` is your BOSH environment alias. For more information about creating an environment alias for BOSH v2 or later, see [Environments](https://bosh.io/docs/cli-envs/) in the BOSH documentation.
        * `SYSTEM-DOMAIN` is the system domain of your <%= vars.app_runtime_abbr %> deployment.
        * `CUSTOM-OPS-FILE.yml` is your operations file.
  <% end %>
  
  
  ## <a name="register-an-is"></a> Register an Isolation Segment
  
  <%= vars.isolation_segments_create %>
  
  To register an isolation segment in the Cloud Controller database (CCDB), use the cf CLI. 
  
  <%= vars.isolation_segments_note %>
  
  To register an isolation segment in the CCDB:
  
  1. Log in to your deployment by running:
  
  