HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 291

• FCIP bandwidth considerations, page 293 • FCIP gateways, page 295 • Third-party QoS and data encryption FCIP products, page 296 FCIP mechanisms FCIP gateways encapsulate Fibre Channel frames into IP packets and transmit them through a tunnel in an existing IP network infrastructure. The IP tunnel is a dedicated link that transmits the Fibre Channel data stream over the IP network. On the receiving end, the FCIP gateway extracts the original Fibre Channel frames from the received IP packets and then retransmits them to the destination Fibre Channel node. The gateways also handle IP-level error recovery. NOTE: You must use the same gateway model at both ends to ensure interoperability. To connect to FCIP gateways, B-series and M-series switches connect through an E_Port, while C-series switches use plug-in modules. Figure 83, Figure 84, and Figure 85 show IP link configurations. FCIP link configurations Using FCIP, you can configure the SAN ISL through a single link, dual links, or shared links. FCIP single-link configuration The simplest FCIP configuration comprises one link (Figure 83). Fabric 1 Fabric 1 Local IP Remote Figure 83 FCIP single-link configuration . 25146a FCIP dual-link configuration A dual-link configuration provides redundancy (Figure 84). If one link fails, the other link temporarily handles all data replication. For enhanced fault tolerance, you can use two IP providers. Fabric A1 Local IP Fabric A1 Remote Fabric B1 Local IP Figure 84 FCIP dual-link configuration . Fabric B1 Remote 25147b SAN Design Reference Guide 291