Scenario
In this scenario, we have a
high-availability pair of Compellent SC8000 controllers, and need to integrate with
a Dell M1000e Blade Enclosure. Each SC8000 controller has two dual-port 10 GbE
I/O cards. The Blade enclosure has 4 x PowerConnect M8024-k (10 GbE) Blade
Switches installed in Fabrics A and C. The blades being used are PowerEdge M620
Half-Height blades, with dual-port 10 GbE Network Daughter Cards (NDC) and
dual-port 10 GbE Mezzanine cards in Fabric C. The M620 blades will have VMware ESXi 5.0 installed.
Fig. 1: Cabinet
Diagram (Front and Back) showing SC8000 controllers with SC220 disk shelves and
M1000e Blade Chassis with PowerConnect M8024-k blade switches.
In the diagram above we have placed the disk shelves
either side of the SC8000 controllers, this has advantages regards cabling
(especially length of cabling required) and will allow for future expansion in
the empty spaces above and below.
iSCSI Cabling Design
The iSCSI cabling design below provides a dual fabric
design (completely independent iSCSI fabrics A and B) with complete resilience
to a blade switch failure, or a blade network card failure.
Fig. 2: iSCSI
Cabling Design with dual fabrics and resilient to blade switch or network card failure.
The uplinks to the top-of-rack switches serve for adding
in additional external physical hosts if required.
VMware ESXi Host VMNIC to vSwitch Network Design
With the above cabling design, the VMware host networking
is as below:
Fig. 3: VMware Host
vSwitch Networking Design with two dual-port 10 GbE network cards.
The above vSwitch networking design has a dedicated 10
GbE NIC for iSCSI Fabric A, and another dedicated 10 GbE NIC for iSCSI Fabric
B; and these are on separate network cards. The Management VMkernel, VM
Networks, and vMotion VMkernel, all share the same vSwitch which has two
physical 10 GbE NICs and is connected to stacked M8024-k Blade Switches.
Other Cabling
For reference, the below diagram highlights some of the
other cabling considerations involved.
Fig. 4: Cabling for
non-iSCSI networks, and other SC8000 connections.
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