HP 316095-B21 - StorageWorks Edge Switch 2/24 Release Note page 20

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Full-fabric capability for Edge Switch 2/12
Unlike other edge switch and director products, a product feature enablement
(PFE) key, controls Edge Switch 2/12 E_Port-to-E_Port connections. Once the
feature key is purchased and installed, the switch can be configured for E_Port
connections on any of the active ports.
The feature key includes distance support. With firmware 06.00.00 and later, the
Edge Switch 2/12 ships standard with five buffer-to-buffer (BB) credits allocated
to each port. After activation of the Full Fabric feature on a switch, every port has
12 BB Credits allocated to support up to 12 km links at 2Gb/s speeds.
Hard zoning for Edge Switch 2/12 and Edge Switch 2/24 switch loop ports
Firmware 06.00.00 and later extends Hard Zoning to loop (FL) ports on Edge
Switch 2/12 and Edge Switch 2/24. Previously, zoning on FL ports was regulated
in software.
20 HP StorageWorks Edge Switch release notes