.Part 4 SAN Extension and Bridging HP SAN Design Reference Guide 785354-001

The following sections describe network requirements for replication products with qualified
gateways:
• “SAN extension best practices for HP P6000 Continuous Access” (page 296)
• “ HP P6000 Continuous Access with XCS 11x, XCS 10x, or XCS 09x” (page 296)
• “HP P6000 Continuous Access with XCS 6.x” (page 298)
• “HP P6000 Continuous Access with VCS 4.x” (page 301)
• “HP P9000 (XP) Continuous Access” (page 304)
• “OpenVMS host-based volume shadowing” (page 316)
SAN extension best practices for HP P6000 Continuous Access
HP recommends you consider the following best practices when implementing SAN extension using
FCIP with HP P6000 Continuous Access:
• Separate host traffic from replication traffic in environments that employ FCIP gateways. This
decouples the host I/O from throughput on the inter-site link. This can be achieved in the
following ways:
◦ Use separate switches and separate fabrics for host and replication I/O (preferred
solution).
◦ Replication zones can be set up through fabric zoning. Using standard fabric zoning,
the host traffic is separated from the replication traffic.
• For high availability and no single point of failure, the best practice is to deploy a 6-fabric
solution, where there are two inter-site links. This solution uses separate switches for the
replication and host fabrics. At least one of the EVAs must be an EVA8x00. Two fabrics that
are dedicated to replication and four fabrics are dedicated to host I/O traffic.
• If only a single ISL is available, then a 5-fabric configuration can be used. This solution requires
using separate switches for the host and replication fabrics. Only one fabric would be dedicated
to replication traffic.
• Use a 2-fabric (dual fabric) configuration only if the host traffic cannot be separated from the
replication traffic. This is recommended only when the customer business requirements permit
it. Take care when designing a 2-fabric configuration over FCIP links, as host port blocking
can occur.
For information on the different fabric configurations or on the HP SCSI Fibre Channel protocol
option, see the HP P6000 Continuous Access Implementation Guide.
HP P6000 Continuous Access with XCS 11x, XCS 10x, or XCS 09x
This section describes the HP P6000 Continuous Access with P6350/P6550 EVA XCS 11x,
P6300/P6500 EVA XCS 10x, and EVA4400/6400/8400 10x or XCS 09x data replication
specifications and the supported minimum and maximum transmission rates for qualified switch
and gateway pairs. Table 145 (page 297) lists the network requirements for long-distance gateways
when using XCS 11x, XCS 10x, and XCS 09x.
296 SAN extension