Cookie Hash and HTTP Cookie Insert

 Cookie Hash

The Cookie Hash method consistently maps a cookie value to a specific node. When the client returns to the site, the BIG-IP system uses the cookie information to return the client to a given node. With this method, the web server must generate the cookie; the BIG-IP system does not create the cookie automatically as it does when you use the HTTP Cookie Insert method.

HTTP Cookie Insert

Using the HTTP Cookie Insert method, the information about the server to which the client connects is inserted in the HTTP header of the response from the server in the form of a cookie. By default, the cookie is named BIGipServer<pool_name> and includes the encoded address and port of the server handling the connection. The system sets the expiration date for the cookie based on the Expiration setting in the cookie persistence profile. HTTP Cookie Insert is the default value for the Cookie Method setting.

source:F5.com