HP ProLiant BL495c HP BladeSystem c-Class SAN connectivity technology brief - Page 12

Port redundancy strategies, FC SAN configurations for the HP BladeSystem c7000 Enclosure

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The number of FC interconnect modules required for an HP BladeSystem c7000 Enclosure is determined by the number of FC ports per server blade (Table 2). HP recommends the use of redundant SANs. Redundancy for FC HBA mezzanine cards requires the following configurations: • One or more server blades with a dual-port FC HBA card require two FC interconnect modules. • One or more server blades with two dual-port FC HBA cards require four interconnect modules. • One or more full-height server blades with three dual-port FC HBA cards require the maximum of six FC interconnect modules. Table 2. FC SAN configurations for the HP BladeSystem c7000 Enclosure Server blades 16 half-height blades, each with 1 dual-port FC HBA 16 half-height blades, each with 2 dual-port FC HBAs 8 full-height blades, each with 1 dual-port FC HBA 8 full-height blades, each with 2 dual-port FC HBAs 8 full-height blades, each with 3 dual-port FC HBAs 4 full-height blades, each with 3 dual-port FC HBAs and 8 half-height blades, each with 2 dual-port FC HBAs Total # of HBA ports 32 64 16 32 48 56 # of interconnect modules required 2 4 2 4 6 6 Server aggregate bandwidth 256 Gb/s 512 Gb/s 128 Gb/s 256 Gb/s 384 Gb/s 448 Gb/s Port redundancy strategies The flexible HP BladeSystem c-Class architecture allows numerous configurations to achieve SAN availability and redundancy goals. Each FC HBA mezzanine card provides two FC ports. However, the infrastructure designer can choose to achieve redundancy by installing two mezzanine cards per server blade but using only one port per card. For example, if both mezzanine slots 1 and 2 are populated with FC HBA mezzanine cards but only port 1 is enabled for each mezzanine card, interconnect modules installed in interconnect bays 3 and 5 will provide redundant server blade connectivity. In the event that an FC card, interconnect module, or associated external SFP transceiver or optical cable should fail, the server blade would retain connectivity through the alternate port path provided by the second HBA mezzanine card. 12

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The number of FC interconnect modules required for an HP BladeSystem c7000 Enclosure is
determined by the number of FC ports per server blade (Table 2). HP recommends the use of
redundant SANs. Redundancy for FC HBA mezzanine cards requires the following configurations:
•
One or more server blades with a dual-port FC HBA card require two FC interconnect modules.
•
One or more server blades with two dual-port FC HBA cards require four interconnect modules.
•
One or more full-height server blades with three dual-port FC HBA cards require the maximum of six
FC interconnect modules.
Table 2.
FC SAN configurations for the HP BladeSystem c7000 Enclosure
Server blades
Total # of
HBA ports
# of interconnect
modules required
Server aggregate
bandwidth
16 half-height blades,
each with 1 dual-port FC HBA
32
2
256 Gb/s
16 half-height blades,
each with 2 dual-port FC HBAs
64
4
512 Gb/s
8 full-height blades,
each with 1 dual-port FC HBA
16
2
128 Gb/s
8 full-height blades,
each with 2 dual-port FC HBAs
32
4
256 Gb/s
8 full-height blades,
each with 3 dual-port FC HBAs
48
6
384 Gb/s
4 full-height blades,
each with 3 dual-port FC HBAs
and
8 half-height blades, each with 2
dual-port FC HBAs
56
6
448 Gb/s
Port redundancy strategies
The flexible HP BladeSystem c-Class architecture allows numerous configurations to achieve SAN
availability and redundancy goals. Each FC HBA mezzanine card provides two FC ports. However,
the infrastructure designer can choose to achieve redundancy by installing two mezzanine cards per
server blade but using only one port per card.
For example, if both mezzanine slots 1 and 2 are populated with FC HBA mezzanine cards but only
port 1 is enabled for each mezzanine card, interconnect modules installed in interconnect bays 3 and
5 will provide redundant server blade connectivity. In the event that an FC card, interconnect module,
or associated external SFP transceiver or optical cable should fail, the server blade would retain
connectivity through the alternate port path provided by the second HBA mezzanine card.
2