HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 297

FC-SONET Local SONET FC-SONET Remote 25150a Figure 86 FC-SONET dual-link configuration . In a dual-link configuration, HP recommends that you limit the maximum sustained I/O load to 40% of the maximum available bandwidth for each link. This allows for instantaneous bursts of I/O activity and minimizes the effect of a link failure on performance. FC-SONET shared-link configuration A shared-link configuration uses only one ISL between fabrics (Figure 87). FC-SONET Local SONET FC-SONET Remote Figure 87 FC-SONET shared-link configuration . 25151a NOTE: Do not use the shared-link configuration if you require high availability because it does not provide redundancy between fabrics. It can also decrease performance because the total bandwidth available for storage is shared by the two fabrics. FC-SONET network considerations Implementing FC-SONET with your existing network depends on the expected storage replication application load and existing network traffic. The key consideration is whether you have enough unused or available bandwidth from your network to support the current network load, accommodate future growth, and handle replication load demands. HP supports the use of SONET with XP Continuous Access (see ATM and SONET/SDH on page 344). Third-party SONET gateways For a list of HP-certified third-party SONET gateways, see "Certified third-party WDM, iFCP, and SONET products" on page 352. Fibre Channel over ATM Direct FC-to-ATM conversion is supported by the Fibre Channel standards. However, currently, no vendors sell direct FC-to-ATM gateways. If you have an ATM-based network, consider using FC-to-GbE SAN Design Reference Guide 297