HP StorageWorks 2.64 Core Switch - Manual (Page 64)

Zoning Concepts and Guidelines
64 Zoning Version 3.1.x/4.1.x User Guide
Deviations from Single HBA Zoning
Certainly there are cases when the need will arise to deviate from the single HBA
zoning. Such cases include clustered systems, SAN Management appliances, and
when initiators must communicate with each other because another protocol like
IP is being utilized. When this need arises, proper consideration of all
ramifications of the deviation must be understood. Testing in a non-production
environment is strongly recommended.