Currently today, GSLB is available via FQDN and anycast IP on Internet advertised virtual hosts only.

CE hosted virtual hosts should also have DNS delegated domain support to CE hosted DNS services which support various GSLB policies.

At a minimum, topology based resolution should be available, where the resolver source IP can be checked against a topology policy map and specific services hosted in specific CE or RE sites resolved for a TTL if they are currently available via probes. In enterprise data services, resolver IPs are a adequate means of determining client site location. This type of preferred location based service resolution is the currently preferred method of creating globally resilient applications for many established ISV applications in the enterprise market.

Other GLSB policy mechanism are available in BIG-IP DNS services. Use cases can be drawn from the existing customer base.