HP StorageWorks 2/24 FW 07.00.00/HAFM SW 08.06.00 McDATA Products in a SAN Env - Page 168
TCP/IP-based Internet service provider ISP networks., iSAN Routing
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Implementing SAN Internetworking Solutions 4 Figure 4-6 iFCP WAN Extension iSAN Routing An internetworked SAN (iSAN) is a network composed of multiple Fibre Channel fabrics or mSANs, connected by one or more SAN routers, where at least one fabric is remotely located and connected through a WAN. The WAN connection is an iFCP IRL, characterized by high latency and ranging in bandwidth from Digital Service 1 (DS1) at 1.544 Mbps to GbE at 1000 Mbps. iFCP is optimized for TCP/IP-based Internet service provider (ISP) networks. Unlike conventional SAN extension, iSAN Routing terminates the stretched E_Port connection at each fabric edge. Fabric building and reconfiguration issues are isolated and restricted to each fabric because Fibre Channel Class F traffic is not transmitted across the TCP/IP network. Only authorized (zoned) connections between storage devices and servers are allowed across the network. By preserving the autonomy of each local fabric or mSAN, an iFCP SAN routing connection ensures disruptions at one site are isolated and not allowed to propagate to other locations. This configuration provides stability for distance-connected mSANs and promotes high availability for disaster recovery, consolidated tape backup, or other complex, multi-site storage applications. 4-24 McDATA Products in a SAN Environment - Planning Manual