Cisco Collaboration Servers and Appliances Free Sample Questions

Intel Virtualization Technology (VT-x) or AMD-V for AMD processors is the hardware-assisted virtualization feature that must be enabled in the BIOS. This feature allows the hypervisor to create and manage virtual machines efficiently. While Hyper-Threading, Turbo Boost, and C-States affect performance, the hypervisor will not function without VT-x/AMD-V enabled.

Cisco does not support Physical-to-Virtual (P2V) migration tools like VMware Converter for its real-time UC applications due to potential timing and driver issues. The only supported method is to perform a full backup of the source server using the built-in Disaster Recovery System (DRS), deploy a new VM from the correct OVA template, and then restore the DRS backup to the new VM.

The BE6000H (High Density) is designed for deployments of up to 1000 users and supports multiple co-resident applications, including CUCM, CUC, IM&P, and Expressway. The BE4000 is for much smaller deployments. The BE6000S is for small deployments up to 150 users. The BE7000H is for larger deployments (over 1000 users) and would be oversized for this scenario.

Cisco UC applications handle real-time voice and video traffic, which is highly sensitive to latency and jitter. By using reservations, the hypervisor guarantees that the specified amount of CPU and memory is always available to the VM, preventing resource contention and ensuring consistent performance. Setting a limit could throttle the application, while not setting a reservation could lead to resource starvation in a busy environment.

Processor C-States and other power-saving technologies (often labeled as Power Technology, SpeedStep, or similar) can cause latency for real-time applications by dynamically adjusting CPU frequency and core states. For optimal performance of UC applications, Cisco recommends disabling these power-saving features in the BIOS and setting the power profile to 'Maximum Performance' or 'OS Control'. VT-x is required for virtualization and should be enabled. Demand Scrubbing is a memory feature and is less likely to cause this type of latency.

In a 'Specs-based' third-party server deployment, the customer assumes full responsibility for the hardware and the hypervisor layer. Cisco's support responsibility (via TAC) is limited to the Cisco Unified Communications applications themselves. The customer must work with their hardware vendor for any server-related issues and with VMware for any hypervisor-related issues.

Cisco Business Edition 6000/7000 appliances are purpose-built and tested for Cisco Collaboration applications only. Installing third-party applications on the same ESXi host (co-residency) is not a supported configuration and can void the support agreement. All virtual machines on a BE6000/7000 must be approved Cisco applications.

The best practice for security and reliability is to connect the CIMC to a dedicated out-of-band (OOB) management network. This isolates the critical hardware management interface from the production data and ESXi management networks, preventing potential security breaches and ensuring management access even if the production network is down.

Installing VMware Tools is a critical step after the guest OS installation. VMware Tools provides essential drivers for video, networking (VMXNET3), and memory management (balloon driver), which significantly improve the performance and manageability of the virtual machine. Without VMware Tools, the VM will have poor performance and limited functionality.

The main advantage of a Tested Reference Configuration (TRC) or Cisco Validated Design (CVD) is that the entire stack—hardware, firmware, hypervisor version, and application versions—has been tested and validated by Cisco. This ensures compatibility and performance, reduces deployment risks, and provides a clear path for support from Cisco TAC.