Sr-iov – HP Virtual Connect 8Gb 20-port Fibre Channel Module for c-Class BladeSystem User Manual
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The total actual shareable bandwidth cannot exceed 10Gb; however, the preferred speed and maximum
bandwidth settings can exceed a total of 10Gb, allowing ports to take advantage of unused bandwidth
when available.
IMPORTANT:
In Flex-10 environments, four FlexNICs must share a single 10Gb link or 20Gb
link when using Flex-10/20 Adapters together with FlexFabric-20/40 F8 modules. Each FlexNIC
is allocated a guaranteed portion of that 10Gb or 20Gb link's bandwidth and can transmit up to
10Gb or 20Gb. The same rules for setting different bandwidths apply.
A Flex-10 capable NIC (embedded Ethernet or mezzanine card) is seen as four FlexNICs per 10Gb port if
that NIC is directly connected to an HP Virtual Connect Flex-10 or FlexFabric module. Four FlexNICs are
indicated when connected to an empty interconnect bay because it is assumed that an HP Virtual Connect
Flex-10 or FlexFabric module will be installed in that bay. If a Flex-10-capable NIC is connected to a Virtual
Connect interconnect module that does not support Flex-10 or a non-Virtual Connect interconnect module,
that NIC is seen as only one Ethernet device per physical port.
The following table shows an example of how a BL495c Flex-10 embedded dual port NIC would be
presented when connected to different interconnects. For more information about mapping between servers
and interconnect bays, see the HP BladeSystem c-Class enclosure documentation on the HP website
Connected to
Number of FlexNICs presented to
the host per port
HP Virtual Connect FlexFabric-20/40
F8 Module
4
HP Virtual Connect FlexFabric
10Gb/24-port Module
4
HP Virtual Connect Flex-10 10Gb
Ethernet Module
4
HP Virtual Connect Flex-10/10D
Module
4
HP GbE2c Ethernet Blade Switch
2
Cisco Catalyst Blade Switch 3120
2
HP 10GbE Pass-Thru Module
2
Empty interconnect bay
4
SR-IOV
Beginning with VC 4.10, VC supports SR-IOV by automatically allocating all Virtual Functions (VFs) to the
third Physical Function (PF) on each port of the server. VC enables SR-IOV on certain BLOMs, mezzanine
cards for Gen8 servers, and LOMs for G7 servers. SR-IOV is not enabled on Integrity servers. For a complete
list of adapters and operating systems VC supports, see the "Prerequisites" section of the HP Virtual Connect
Version 4.20 Release Notes.
When SR-IOV VFs are allocated to a connection, an event is logged to the VCM system log. The VCM system
log indicates that SR-IOV has been enabled. Example:
2012-11-07T09:33:21-06:00 VCEFXTW210600GN vcm_svr: [PRO::6043:Info] SR-IOV
Virtual Functions added : Profile: p_sriov, Enet connection: 5, Number VFs:
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