Inter Converged System ELM scalability planning with multiple
physical data centers
Determine the maximum number of Converged System which can be configured with ELM with VMware
vSphere 6.0 in multiple physical data centers.
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Each ELM with VMware vSphere 6.0 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 datacenter. This approach maintains a consistent level
of performance, which may not be achievable when SSO authentication must traverse a WAN. A
maximum of four physical data centers are supported with an ELM configuration with VMware
vSphere 6.0.
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A standard Converged System configuration with two PSCs supports a maximum of four
Converged Systems with multiple physical data centers. Each Converged System requires a
minimum of one VMware vCenter server. ELM has an upper limit of ten 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 Code Matrix (RCM) consistently across all four Converged Systems distributed across
two 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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Dell EMC recommends a maximum of two Converged Systems in an ELM configuration with
VMware vSphere 6.0 and multiple physical data centers. Dell EMC does not recommend such a
large fault tolerant and data protection and recovery domain for an ELM configuration with
VMware vSphere 6.0 with four Converged Systems across two physical data centers. Each
physical data center supports one Converged System with two PSCs and a maximum of two
VMware vCenter servers. In this scenario, a Dell EMC AMP-2S solution is easier to maintain 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 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 the entire 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
When deploying VMware ELM, replicate roles, permission, licenses, tags, and policies across linked
VMware vCenter servers.
For VMware vSphere 6.0, Dell EMC recommends no higher than 100 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 6.0, you cannot consolidate multiple SSO domains in each product line.
VMware vSphere 6.0 supports both VMware vCenter Windows and VCSA in Enhanced Linked Mode.
See the following link for VMware vSphere 6.0:
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Configuring VMware Enhanced Linked Mode (vSphere 6.0)
