1. AR/DAT (Autonomous Regions with Domain Address Translation) Native FC Solution LightSand Communications

2. Why thinking AR? It Resolves –Scalability Issue Number of switches in the fabric Number of devices in the fabric Recourses: NS, Zoning database size –Traffic disruption Fabric reconfiguration Node join / leave –SAN over WAN? Latency, bandwidth and more AR are already in standard, just needs to be more precisely defined Utilizes existing routing mechanisms and services Absolutely backward compatible Brings the same functionality as other approaches

3. Media Independent Backbone BB: FSPF, NS, … FC-PH. FC Emulation. Physical media AR0 - Backbone AR1AR2 BSW1 – Boarder Switch1 BSW2 – Boarder Switch2 AR1,AR2 – are Fabrics absolutely compliant with FC-SWx, FC-GSx The main functionality absorbed by BSW and optional for implementation

4. Who cares – what’s outside? FC Switch Director FC Switch Server Storage Server BSW 0xFFFF Virtual devices In xx Domain Space E-Port ARx DID = xx

5. BSW – Termination Point ARx AR0 Backbone DID = xDID = y Fabric Services BB Services FSPF AR FSPF BB Address Mapper (DAT) Zoning NS BB NS

6. Local and Remote Topologies WAN AR2 Department 2 AR1 Department 1 AR0 BB AR3 Backup Facility

7. AR/DAT Advantages Native FC Architecture based on current standards No changes in FC-PH or FC-FS AR are independent full function FC Fabrics 100% backward compatibility BSW takes care of all inter-AR communications BSW is optional functionality Virtually endless scalability Improved security, manageability and performance