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VMware 2V0-13.25 Exam - Topic 2 Question 18 Discussion
Topic #: 2
A large financial institution is designing a VMware Cloud Foundation (VCF) solution. During the initial discovery meetings, the customer detailed the following requirements:
* Management of the physical network environment is handled by an outsourced team.
* The VMware Administration team cannot re-configure the physical network.
* All hosts must use Link Aggregation.
* The storage environment is disaggregated.
* NFS will be used as principal storage.
The customer provided the bill-of-materials for the physical servers being purchased. Each server will have four 25 GbE physical NICs: two connected to the network fabric for Management, vMotion, and virtual machine traffic; and two connected to the storage fabric hosting the NFS server.
How does the information provided impact the overall design?
VCF networking guidance emphasizes independent uplinks and notes that while LACP is supported, it is not recommended and introduces additional operational considerations. Specifically: ''Link aggregation to the host is supported but not recommended---the default switch-independent load-based teaming (LBT) provides benefits similar to those of LACP without added configuration complexity.'' It further states: ''Use of LACP... requires specific LACP configuration and switch setup... Not all vSphere features are supported with LACP... [and is] API only.'' The design recommendation is: ''Ensure each connection between the fabric switch and host operates as an independent uplink.''
Given the customer constraint that the VMware Administration team cannot re-configure the physical network, the prerequisite physical switch port-channel configuration for LACP cannot be performed. During bring-up and life-cycle operations, the Management Domain must follow VCF's standardized, automated patterns and therefore cannot rely on fabric changes the team cannot make. As a result, LAG cannot be used in the Management Domain, and the design must adopt independent uplinks (LBT) for management, vMotion, and VM traffic while using NFS as principal storage per the NFS Storage Model.
Reference (VMware Cloud Foundation documents):
* VCF 9.0.1 Design -- Network Link Aggregation: support, ''not recommended,'' API-only, and independent uplink recommendation.
* VCF 9.0.1 Design -- Link Aggregation Design Recommendations (independent uplinks).
* VCF 9.0.1 Design -- NFS Storage Model (principal NFS usage context).
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