Clustering Allaire Application Servers Behind Cisco's Content Services Switch (Formerly Arrowpoint)
This article provides general guidance for setting up a ColdFusion or JRun cluster behind a CSS 11000. It also deals with the specific requirements for running the CSS WebNS 4.0 keepalives HTTP HEAD and HTTP GET with ColdFusion servers:
Clustering Allaire Application Servers Behind Cisco's Content Services Switch (Formerly Arrowpoint) (Allaire/Macromedia Knowledge Base Article, Updated March 29, 2001)