An administrator is configuring a stretched HA configuration and has HA errors on all of the hosts at
the remote site. What can be done to ensure virtual machines at one site can be restarted at the
remote site?
A.
Ensure any firewalls between the hosts are allowing port 8182
B.
Create separate HA clusters at each site and enable Stretch Cluster on each
C.
Ensure the latency between the sites is less than 5 milliseconds
D.
Ensure each site has no more than 4 primary hosts
Explanation:
TO make sure virtual machines can be restarted at the remote site, you need to allow port 8182
between the hosts.
opening port 8182 is falls under the heading “General Networking gGidelines” for HA (http://www.vmware.com/files/pdf/techpaper/vmw-vsphere-high-availability.pdf, pg6,7), but wouldn’t the specific Stretched Cluster requirement trump a guideline?:
https://www.vmware.com/files/pdf/techpaper/Stretched_Clusters_and_VMware_vCenter_Site_Recovery_Manage_USLTR_Regalix.pdf pg 9, Multisite Stretched Cluster :
Due to the technical constraints of an online migration of virtual machines, these datacenters have some requirements that must be met prior to consideration of a stretched cluster implementation: they must be closer than approximately 100 kilometers apart… they must have round-trip time latency of 5 milliseconds or less
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I think A (open firewall port 8182) is correct in that the question states that ALL hosts at remote site have HA errors and following Occam’s razor it’s the simplest solution. (I agree crappy question).
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