Category Archives: General

vSphere Distributed Resource Scheduler can balance workloads across cluster hosts, but many environments need placement rules that are stronger than pure resource optimization. Licensing boundaries, fault-domain separation, application dependencies, hardware characteristics, and compliance requirements can all require some virtual machines to run together, apart, on a defined host group, or away from a host group. […]

vSphere High Availability can restart virtual machines after an ESXi host failure only if the surviving cluster has enough usable capacity. Admission control exists to protect that capacity before the failure occurs. It can block new power-ons or other operations when accepting them would reduce the cluster below the configured failover target. For 2V0-17-25 candidates […]

vCenter Single Sign-On sits on the critical path for administrators, automation, and integrations that need to authenticate to vCenter Server. When login becomes slow or unreliable, the problem may be inside vCenter, but it may also be in Active Directory or LDAP, DNS, certificates, time synchronization, external identity providers, group expansion, or network paths between […]

vSphere virtual machine encryption protects VM data through policies and keys managed by vCenter and a configured key provider. The cryptography is important, but the operational control plane is the key-management relationship. If the required key provider is unavailable or incompatible with a host, encrypted workloads can become difficult or impossible to power on, migrate, […]

A vSphere Distributed Switch solves a coordination problem that becomes painful as a virtual environment grows: the same network intent has to exist on many ESXi hosts, yet a per-host switch model makes every host another place for VLANs, teaming policies, MTU settings, and port-group names to drift. A distributed switch moves that configuration into […]

The Architecture Development Method is often drawn as a circular sequence of phases, which can tempt teams to interpret TOGAF as a large waterfall. The method is more flexible than that picture suggests. The ADM is iterative across the whole cycle, between phases, and within phases. Scope, level of detail, time horizon, and use of […]

An enterprise can own the TOGAF Standard, train architects, buy a repository tool, and still have a weak architecture function. Architecture capability is the organizational ability to develop, govern, communicate, and sustain enterprise architecture in a way that influences real decisions. It depends on people, roles, governance, skills, methods, information, tooling, stakeholder relationships, and integration […]

Aruba Central groups look simple because the interface presents them as containers for devices. In practice, a group is a configuration and administrative boundary. Devices placed in the same group can inherit common configuration behavior, and the group can define whether different device categories are managed with UI-based workflows or configuration templates. A poor grouping […]

Aruba ClearPass Policy Manager is most useful when access decisions are based on context rather than on one static VLAN or one universal authentication rule. ClearPass can combine authentication methods, identity sources, authorization attributes, role mapping, posture or device context, and enforcement profiles to decide what a user or device should be allowed to do. […]

Aruba Virtual Switching Extension, or VSX, is a resilience design built around two independent AOS-CX switches that cooperate closely without becoming one control plane. That distinction is the first design principle to understand. The pair can present multi-chassis link aggregation to downstream or upstream devices, synchronize selected configuration, and coordinate forwarding, yet each peer retains […]

Enhanced due diligence is what happens when ordinary customer due diligence is not enough to understand or control the risk of a relationship. The word “enhanced” can make EDD sound like a fixed package of extra documents, but risk-based guidance points in a different direction: the additional work should respond to the specific risks presented […]

Aruba Dynamic Segmentation changes the campus design question from “which VLAN is this port in?” to “what role should this endpoint receive?” The feature combines authentication, client roles, VLAN or tunnel behavior, and centralized policy so that access can be based on identity or device context rather than on the physical jack alone. That is […]

Sanctions screening creates a difficult operating problem because names are not unique. A legitimate customer can share a name, transliteration, spelling variant, or partial descriptor with a sanctioned person. If every similarity is treated as a confirmed match, operations can freeze under alert volume. If thresholds are loosened too far, true matches can be missed. […]

MetroCluster is not simply a replication feature. It is a site-resilience architecture that combines ONTAP clustering with synchronous data mirroring so workloads can continue when a storage site or major site dependency is lost. That makes its design much closer to a disaster-recovery operating model than to a normal backup schedule. A useful starting point […]

Suspicious activity programs fail in two opposite ways. One path sends nearly every unusual event to the highest level, overwhelming investigators and producing noise. The other path leaves important signals in front-line queues because nobody is sure who has authority to escalate them. A strong escalation model separates unusual activity from potentially reportable suspicion through […]