An administrator is configuring software iSCSI multipathing. Which of the following is
the minimum required configuration for Round Robin multipathing?
A.
Configure 2 VMkernel ports. Bind each port to a different uplink on the same virtual
switch. Choose the Round Robin Path Selection Plugin (PSP)
B.
Configure 2 VMkernel ports. Connect each port to a unique virtual switch with
uplinks on separate subnets. Choose the Round Robin Path Selection Plugin (PSP)
C.
Configure 1 VMkernel port. Bind the port to multiple uplinks on the same virtual
switch. Choose the Round Robin Path Selection Plugin (PSP)
D.
Configure 1 VMkernel port. Connect the port to a switch with multiple uplinks.
Choose the Round Robin Path Selection Plugin (PSP)
Explanation:
A "Multivendor Post" on using iSCSI with VMware vSphere
So – setup in 4 easy steps:
Step 1 – configure multiple vmkNICs
Ok, the first obvious (but we’re not making any assumptions) is that you will need to
configure multiple physical Ethernet interfaces, and multiple vmkernel NIC (vmkNIC)
ports.
Step 2 – configure explicit vmkNIC-to-vmNIC binding.
To make sure the vmkNICs used by the iSCSI initiator are actual paths to storage, ESX
configuration requires the vmkNIC is connected to a portgroup that only has one active
uplink and no standby uplinks. This way, if the uplink is unavailable, the storage path is
down and the storage multipathing code can choose a different path.
Step 3 – configuring the iSCSI initiator to use the multiple vmkNICs
Then the final step requires command line configuration. This step is where you assign,
or bind, the vmkNICs to the ESX iSCSI initiator. Once the vmkNICs are assigned, the
iSCSI initiator uses these specific vmkNICs as outbound ports, rather than the vmkernel
routing table.
Step 4 – Enabling Multipathing via the Pluggable Storage Architecture
VMware ships with a set of native SATPs, and 3 PSPs: Fixed, Most Recently Used
(MRU), & Round Robin (RR). Fixed and MRU options were available in VI3.x and
should be familiar to readers. Round Robin was experimental in VI3.5, and is supported
for production use in vSphere (all versions)
Configuring NMP to use a specific PSP (such as Round Robin) is simple and easy. You
can do it in the vSphere Client under configuration, storage adapter, select the devices,
and right click for properties.