Inter Converged System ELM scalability planning with multiple
physical data centers (vSphere 6.5U1)
Determine the maximum number of Converged System which can be configured with ELM with VMware
vSphere 6.5U1 in multiple physical data centers.
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Each ELM with VMware vSphere 6.5U1 configuration requires a minimum of two PSC servers per
physical data center. If a primary PSC outage occurs, each VMware vCenter can be repointed to
the secondary PSC in the same physical data center. This approach maintains a consistent level
of performance. A maximum of five physical data centers are supported with an ELM
configuration with VMware vSphere 6.5U1.
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A standard Converged System configuration with two PSCs supports a maximum of five
Converged Systems with multiple physical data centers. Each Converged System requires a
minimum of one VMware vCenter server. ELM has an upper limit of 15 VMware vCenter servers.
In this configuration, each of the four Converged Systems can support more than one VMware
vCenter servers. In this configuration, you must maintain the Dell EMC VMware vSphere software
Release Certification Matrix (RCM) consistently across all five Converged Systems distributed
across physical data centers. Periodically, you must monitor PSC replication sequence numbers
to verify PSC synchronization. A Dell EMC AMP-2S is easier to operate and support and still
provides single pane of glass management for the multiple Converged Systems.
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Deployment of more than one VMware vCenter server per Converged System requires the
deployment of a redundant AMP server with an external VNXe. Each AMP Server must be
appropriately scaled to support multiple VMware vCenter servers.
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You must appropriately scale all Converged System, AMP, network, storage, and compute
environment resources when deploying multiple VMware vCenter servers and the associated
resources in a Converged System.
VMware ELM deployment information (vSphere 6.5U1)
When deploying VMware ELM, replicate roles, permission, licenses, tags, and policies across linked
VMware vCenter servers.
For VMware vSphere 6.5U1, Dell EMC recommends no higher than 150 ms RTT
between a VMware PSC spanning physical data centers and no higher than 10 ms
RTT between VMware PSCs in a site.
The legacy VMware vSphere Client does not support Enhanced Linked Mode
With VMware vSphere 6.5U1, you cannot consolidate multiple SSO domains in each product line.
For VMware vSphere 6.5U1, Dell EMC does not recommend and does not support a mix of embedded
and external PSCs. A VMware vCenter server with an embedded VMware PSC is suitable for small
environments. You cannot join other VMware vCenter servers or VMware PSCs to this VMware vCenter
Single Sign-On domain.
Dell EMC has made no assumptions regarding VMware vMotion support between VMware vCenter
servers. Cold migration between VMware vCenter servers using a recommended L3 Provision network is
possible.
Migration between VMware vCenter servers must meet the VMware requirements.
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Configuring VMware Enhanced Linked Mode (vSphere 6.5U1)
