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 When a VLAN is added to a trunk and it does not appear on the vNIC of an associated server, it typically indicates that the vNIC template is not updating as it should to reflect changes. By changing the template type of Trunk-A to an updating template, any changes made to the trunk configuration, such as adding a new VLAN, will be dynamically applied to all vNICs associated with that template. This action will allow the newly added VLAN to be included in the vNIC configuration without the need to manually update each vNIC or recreate the templates.

References := This recommendation aligns with best practices for managing vNIC templates in Cisco UCS environments, where updating templates are used to ensure changes propagate automatically to all associated instances

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To achieve the most optimal on demand CPU performance while configuring the BIOS settings of a UCS C-series rack mount server, you should set the CPU Performance option to C0/C1 state. This option enables the CPU to operate in the highest performance state (C0) or the lowest power state (C1) depending on the workload demand. This allows the CPU to maximize its performance and efficiency without compromising its thermal and power limits. The other options (C6 Retention, C2 state, and C6 non-Retention) reduce the CPU performance by putting the CPU into deeper sleep states (C2 or C6) when idle, which can increase the latency and power consumption when resuming the CPU activity. References: For more details on how to configure the BIOS settings of a UCS C-series rack mount server, please refer to the following resources:

• Cisco UCS C-Series Servers Integrated Management Controller GUI Configuration Guide
• Cisco UCS C-Series Rack-Mount Server BIOS Settings

To enable port security on all Cisco MDS series switches in the fabric and avoid the extensive manual configuration of the switch ports, the network engineer must activate the CFS (Cisco Fabric Services) distribution and enable the auto-learning port security feature on a per-VSAN basis. CFS is a protocol that allows the switches to distribute and synchronize configuration information across the fabric. By activating the CFS distribution for port security, the network engineer can propagate the port security configuration to all the switches in the fabric automatically, without having to configure each switch individually. The auto-learning port security feature allows the switches to learn and store the port security information of the devices that are already logged in and authorized on the ports, and prevent any unauthorized devices from logging in. The auto-learning port security feature can be enabled on a per-VSAN basis, which means that the port security information is specific to each VSAN and does not affect other VSANs. This provides more flexibility and granularity for the port security configuration. References :=

• Implementing and Operating Cisco Data Center Core Technologies (DCCOR) v1.2, Module 7: Data Center Storage Connectivity, Lesson 7.3: Fibre Channel Protocol
• Cisco MDS 9000 Family NX-OS Security Configuration Guide, Chapter: Configuring Port Security