The Hierarchy panel lets you configure the appliance to participate in ICP and CERN hierarchies.
ICP caches cooperate in finding URLs, thereby generating packet traffic on the network. CERN uses static routing without queries, offering less flexibility and power but generating much less network traffic.
If you define both ICP and CERN hierarchical relationships, the ICP hierarchy takes precedence.
The caching system does not support CARP.
For a brief explanation of how hierarchies function, see Overview.
For tips and guidelines on setting up hierarchies, see CERN Hierarchy Setup and ICP Hierarchy Setup.
For more information on caching hierarchies, see one of the TCP/IP references available at any bookstore carrying computer reference manuals.