HP StorageWorks 4000/6000/8000 .HP StorageWorks SAN Design Reference Guide, Pa - Page 193

Server Bay 1, fc1/16 Server Bay 2, fc1/15 Server Bay 3, fc1/11 Server Bay 4, fc1/9 Server Bay 5, fc1/4 Server Bay 6, fc1/2 Server Bay 7, fc1/8 Server Bay 8, fc1/22 Server Bay 9, fc1/19 Server Bay 10, fc1/17 Server Bay 11, fc1/12 Server Bay 12, fc1/13 Server Bay 13, fc1/3 Server Bay 14, fc1/6 Server Bay 15, fc1/7 Server Bay 16, fc1/21 N_Port (host) Server HBA ports, N_Ports c-Class BladeSystem N_Port Virtualization F_Port (virtual) c-Class BladeSystem N_Port Virtualization (NPV) FLOGI/FDISC on all available NP links is load balanced using round-robin. If there are multiple uplinks, then the server logins are distributed equally among them. ext1, fc1/10 NP_Port ext2, fc1/14 NP_Port ext3, fc1/18 NP_Port ext4, fc1/20 NP_Port ext5, fc1/24 NP_Port ext6, fc1/23 NP_Port ext7, fc1/5 NP_Port ext8, fc1/1 NP_Port F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) F_Port (NPIV) Blade enclosure with 16 servers NPV Core Switch 25345a Figure 51 Cisco MDS 9124e Fabric Switch for HP c-Class BladeSystem in NPV mode . NOTE: The NP_Ports in Figure 51 are on the NPV devices, not the hosts. Failover policy The failover policy enables automatic remapping of hosts if NP_Ports go offline. It evenly distributes the hosts among the available NP_Ports. This policy ensures a smooth transition with minimal traffic disruption when a link fails between an NP_Port on the NPV devices and an F_Port on the external fabric. To avoid disruption when an NP_Port goes online, the logins are not redistributed. NPV mode considerations Consider the following: • Nondisruptive upgrades are supported. • Grouping devices into different VSANs is supported. • A load-balancing algorithm automatically assigns end devices in a VSAN to one of the NPV core switch links (in the same VSAN) at initial login. • You can connect B-, C-, and M-series fabrics without interoperability constraints (see the release notes for support information). • A flexible licensing option is available (12 or 24 ports, with a 12-port upgrade option on the 12- port model). • You can select to use either switch mode or NPV mode. SAN Design Reference Guide 193