anchor.diff:  
   ## <a name='gcp-implementation'></a> Additional GCP Information
   
  -For more information, see [Understanding backend services](https://cloud.google.com/compute/docs/load-balancing/http/backend-service) in the GCP documentation and the [bosh-google-cpi-release](https://github.com/cloudfoundry-incubator/bosh-google-cpi-release/tree/master/src/bosh-google-cpi) repository on GitHub.
  +For more information, see [Understanding backend services](https://cloud.google.com/compute/docs/load-balancing/http/backend-service) in the GCP documentation and the [BOSH Google CPI Release](https://github.com/cloudfoundry-incubator/bosh-google-cpi-release/tree/master/src/bosh-google-cpi) repository on GitHub.
   
   
   ## <a name='sharding-routers-isolation-segment'></a> Sharding Gorouters for Isolation Segments
  
positive.code: 
  The diagrams illustrate a topology with separate load balancers, but you could also use one load balancer with multiple interfaces. In this configuration:
  
  * Requests for system domain `*.cf-system.com` and the shared domain `*.shared-apps.com` are forwarded to the Gorouters for the <%= vars. app_runtime_abbr %> Diego Cells.
  
  * Requests for private domain `*.foo.private-domain.com` are forwarded to the Gorouters for IS1. Requests for private domain `*.private-domain.com` are forwarded to the Gorouters for IS2.
  
  
negative.code: 
  Isolation segments isolate the compute resources for one group of apps from another. However, these apps still share the same network resources. Requests for apps on all isolation segments, as well as for system components, transit the same load balancers and <%= vars.app_runtime_abbr %> Gorouters.
  
  When you use isolation segments, <%= vars.app_runtime_abbr %> designates its Diego Cells as belonging to an isolation segment called `shared`. This isolation segment is the default isolation segment assigned to every org and space. This can be overwritten by assigning an explicit default for an organization. <%= vars.install_isolation_segments %>
  
  The illustration below shows isolation segments sharing the same network resources.
  
  