A Storage Administrator wants to use all available bandwidth to connect a VMware ESXi host to a
VNX. They decide to use the CNAs as well as some NICs. They do this so they can utilize FCoE
for some VMs and iSCSI for other VMs. They notice that the VMs using FCoE do not have access
to their LUNs.
What is most likely causing this issue?
A.
Jumbo frames are not configured on the Ethernet SAN.
B.
FCoE and iSCSI are not allowed to be used at the same time by the same physical host or its
VMs.
C.
Multiple FC frames are being aggregated together.
D.
FCoE is already being used for SAN Copy.
I thought a single server cannot connect to A VNX through both FCoE and iSCSI. Can someone confirm?
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You can configure ESXi hosts with multiple SCSI transports, such as Fibre Channel
HBAs, and iSCSI software adapters, but accessing the same LUN with multiple SCSI
transport types is not supported. For example, a host can access LUN 0 using FC and LUN 1
using iSCSI, but it cannot access LUN 2 using iSCSI and FC.
(Using EMC VNX Storage with VMware vSphere
Version 4.0
TechBook P/N H8229 REV 05 ® ®)
I think the answer is B
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From EMC’s VNX-VMware techbook (available on Powerlink, document no. h8229, page 32):
“VNX and ESXi support one SCSI transport type at a time. An ESXi host can access a LUN using an FCoE, FC, or iSCSI interface. However, accessing the same device [e.g. a single LUN] using different SCSI transport protocols is unsupported.”
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