75 of 230 questions · Page 3/4 · Compute · Answers revealed
Which THREE components are part of a HyperFlex HX Data Platform (HXDP) cluster? (Choose three.)
Witness provides quorum.
Why this answer
HXDP cluster includes controller VMs, storage nodes, and a witness VM for quorum.
A service profile is configured to boot from local disk, but the blade server has no local storage. What will happen when the blade is associated with this service profile?
Without a boot device, the blade will not boot.
Why this answer
UCS Manager does not validate hardware capabilities at association time. The blade will boot and fail to find a boot device, resulting in a boot failure. The service profile can still be associated.
A data center engineer is using Cisco Intersight to manage a hybrid infrastructure that includes UCS servers and HyperFlex clusters. The engineer needs to deploy a new server profile to a UCS domain that is claimed in Intersight. The profile includes a firmware policy that specifies version 4.1(3c) for the motherboard and 5.0(3a) for the storage controller. The target server is a C-Series rack mount server currently running firmware version 4.0(2a) on the motherboard. After deploying the profile, the server goes into a 'Pending' state and does not become 'Selectable'. The engineer checks the UCS Manager and sees that the server is in 'Discovery Failed' state. The engineer has verified that network connectivity is fine and the CIMC is accessible. What should the engineer do to resolve this?
Manually updating the firmware to a version compatible with the UCS domain will allow the server to be discovered, after which the profile can be applied.
Why this answer
When a firmware policy in Intersight specifies a version that is not compatible with the current firmware on the server, the server may enter a 'Discovery Failed' state. In this scenario, the motherboard firmware must be updated to a version that supports the storage controller firmware 5.0(3a) before the profile can be applied. Manually updating the firmware via UCS Manager ensures the server meets the prerequisite firmware baseline, allowing Intersight to complete the deployment.
Exam trap
Cisco often tests the concept that firmware policies have dependency chains, and candidates mistakenly think that a simple re-claim or reset will fix a 'Discovery Failed' state, when in fact the root cause is an incompatible firmware version that must be manually updated first.
How to eliminate wrong answers
Option A is wrong because ensuring consistency between the firmware policy and the current firmware would defeat the purpose of the policy, which is to enforce a target version; the issue is not consistency but compatibility. Option B is wrong because removing and re-claiming the server would not resolve the underlying firmware incompatibility; it would only reset the inventory state without addressing the firmware version mismatch. Option C is wrong because resetting the CIMC to factory defaults would erase configuration but not change the firmware version; the server would still fail discovery due to the incompatible firmware.
A UCS C-series rack server is to be integrated into UCS Manager. The server will be managed by CIMC and must participate in compute pools. Which operating mode should be configured on the C-series server to allow UCS Manager to discover and manage it?
This mode allows UCS Manager to discover and manage the server.
Why this answer
C-series servers can operate in standalone mode (IMC only) or UCS-managed mode. To be managed by UCS Manager, the server must be in UCS-managed mode, which requires enabling UCSM (Cisco UCS Manager) mode in CIMC.
A company is deploying a multi-site UCS environment with UCS Central. Which three capabilities does UCS Central provide over individual UCS Manager instances? (Choose three.)
UCS Central provides a single view of all resources.
Why this answer
UCS Central offers global service profile templates, cross-domain policies, and centralized firmware management across multiple UCS domains.
Refer to the exhibit. The Fabric Interconnect cannot ping its default gateway. The management interface is configured and up. What is the most likely cause?
Without a default route, the FI cannot reach subnets beyond its own.
Why this answer
The Fabric Interconnect cannot ping its default gateway despite the management interface being up and configured, which indicates that the device lacks a route to reach the gateway subnet. A default route is required to forward traffic destined for networks not directly connected; without it, the Fabric Interconnect will drop packets to the gateway even if the interface is operational. This is the most likely cause because the exhibit shows no default route in the routing table, and the interface status confirms Layer 1 and Layer 2 connectivity.
Exam trap
Cisco often tests the distinction between interface-level connectivity (Layer 1/Layer 2) and routing (Layer 3), leading candidates to incorrectly blame VLAN pruning or IP conflicts when the real issue is a missing default route in the management VRF.
How to eliminate wrong answers
Option B is wrong because if the management VLAN were not allowed on the upstream switch, the interface would likely be in a down/down or err-disabled state, but the exhibit states the management interface is configured and up, indicating VLAN pruning is not the issue. Option C is wrong because the exhibit explicitly shows a static IP address configuration (e.g., IP address and subnet mask), so DHCP misconfiguration is not applicable. Option D is wrong because a duplicate IP address would cause intermittent connectivity or address conflict messages, but the interface would still be up and able to send ARP requests; the inability to ping the gateway points to a routing problem, not an IP conflict.
An engineer is deploying a new UCS chassis with two Fabric Interconnects. The design requires that server traffic can fail over to the secondary FI if the primary FI fails, without requiring any changes to the server's network configuration. Which technology must be enabled on the uplink ports of the Fabric Interconnects to the upstream switches to ensure transparent failover of server traffic?
Pin groups with failover mode allow the secondary FI to assume the primary's MAC and IP, enabling transparent failover.
Why this answer
Pin groups with 'failover' mode enable transparent server traffic failover by pinning server vNICs to a specific Fabric Interconnect (FI) and automatically repinning them to the secondary FI upon primary FI failure, without requiring any changes to the server's network configuration. This ensures that the server's MAC and IP addresses remain active on the secondary FI, maintaining connectivity without manual intervention.
Exam trap
Cisco often tests the distinction between upstream redundancy technologies (like vPC) and server-side failover mechanisms (like pin group failover mode), leading candidates to incorrectly choose vPC for transparent server failover when it only addresses link redundancy to the upstream network.
How to eliminate wrong answers
Option A is wrong because a virtual PortChannel (vPC) between Fabric Interconnects and upstream switches provides link-level redundancy and load balancing, but it does not handle server-side failover; vPC is an upstream switch technology, not a mechanism for transparent server failover between FIs. Option B is wrong because QoS policies prioritize traffic types but do not provide any failover mechanism; they are unrelated to transparent server failover. Option D is wrong because Private VLANs isolate traffic within a VLAN for security purposes and have no role in failover or repinning server traffic between Fabric Interconnects.
In a UCS B-series chassis, which component provides the management connectivity between the blades and the Fabric Interconnects?
IOM handles both data and management traffic to FIs.
Why this answer
The Input/Output Module (IOM) in a UCS B-series chassis provides the management connectivity between the blades and the Fabric Interconnects. It aggregates all blade traffic, including management traffic (such as CIMC communications), and forwards it to the Fabric Interconnects over the chassis backplane. Without the IOM, the blades would have no path to the Fabric Interconnects for management or data-plane operations.
Exam trap
Cisco often tests the distinction between the IOM (chassis-level connectivity) and the CIMC (blade-level management controller), leading candidates to mistakenly choose CIMC because they associate 'management connectivity' with the blade's own management processor.
How to eliminate wrong answers
Option A is wrong because the CIMC (Cisco Integrated Management Controller) is the management controller embedded on each blade or server, not a chassis-level component that provides connectivity between blades and Fabric Interconnects. Option C is wrong because UCS Manager is the centralized management software running on the Fabric Interconnects, not a hardware component within the chassis. Option D is wrong because the blade midplane is a passive backplane that provides electrical connectivity between blades and IOMs, but it does not actively manage or provide the management connectivity itself.
Which UCS B-Series chassis component provides the physical slot for a blade server?
Correct. Blade servers install into slots.
Why this answer
The UCS 5108 blade chassis has 8 half-width slots or 4 full-width slots. Blades are inserted into these slots and connect to the midplane.
Which THREE factors should be considered when determining the number of upstream Ethernet uplinks from a UCS Fabric Interconnect to the core network? (Choose THREE.)
More vNICs may require more uplinks for queuing.
Why this answer
The number of vNICs per service profile and their bandwidth limits directly determine the aggregate traffic that must be carried by the upstream Ethernet uplinks. Each vNIC is assigned a specific bandwidth cap (e.g., via QoS policy or vNIC template), and the sum of these caps across all service profiles on a Fabric Interconnect dictates the minimum uplink capacity required to avoid oversubscription.
Exam trap
Cisco often tests the distinction between Layer 2 constructs (VLANs) and actual bandwidth consumption, leading candidates to incorrectly select the number of VLANs as a factor for uplink sizing.
An organization has deployed Cisco UCS Central to manage multiple UCS domains. A global service profile template is created in UCS Central. When a local UCS domain administrator tries to modify the service profile derived from this global template in UCS Manager, what happens?
Global profiles are locked locally.
Why this answer
Global service profiles from UCS Central are read-only in local UCS Manager. They can only be modified in UCS Central, ensuring consistency across domains.
Which management interface is used for out-of-band management of UCS C-Series rack servers, providing features like KVM, virtual media, and remote firmware upgrade?
CIMC provides direct out-of-band management for each C-Series server.
Why this answer
The Cisco Integrated Management Controller (CIMC) is the out-of-band management interface for UCS C-Series servers, offering KVM, virtual media, and remote firmware management.
A company is deploying a Cisco UCS Mini in a remote office. They need to support both VMware vSphere and Microsoft Hyper-V on the same UCS domain. What is the best practice for deploying compute resources for both hypervisors?
Separate templates enable boot order, firmware, and BIOS settings per hypervisor.
Why this answer
Separate service profile templates are required because VMware vSphere and Microsoft Hyper-V have different boot and storage configuration requirements. Each hypervisor needs its own boot policy (e.g., SAN boot vs. local disk), firmware settings, and potentially different vNIC/vHBA configurations. Using distinct templates ensures that each hypervisor's compute resources are correctly provisioned without conflicts.
Exam trap
Cisco often tests the misconception that VLANs or identity pools alone can differentiate hypervisor configurations, when in fact the core differences lie in boot and storage policies that require separate service profile templates.
How to eliminate wrong answers
Option B is wrong because a single service profile cannot accommodate the different boot policies, firmware versions, and storage configurations required by two distinct hypervisors; VLAN assignment for management traffic does not address these fundamental differences. Option C is wrong because UCS Organizations are used for administrative separation and RBAC, not to define different compute resource configurations within a single service profile template; a single template still applies the same policies to all servers. Option D is wrong because identity pools (e.g., UUID, MAC, WWN) only manage unique identifiers, not the boot order, firmware, or storage policies that differ between hypervisors; a single template with different pools still enforces the same configuration.
Refer to the exhibit. A server with vNIC eth0 is experiencing packet drops on its Ethernet interface. The server is sending jumbo frames (MTU 9000) on VLAN 100. The QoS system class 'Class-Platinum' has an MTU of 9216 and is configured with 'Drop'. The vNIC is not assigned to any QoS policy. What is the most likely reason for the drops?
Without a QoS policy, the default class (often Bronze) applies, which has MTU 1500.
Why this answer
When a vNIC is not assigned to a QoS policy, it defaults to the best-effair class, which typically has an MTU of 1500 bytes. Since the server is sending jumbo frames (MTU 9000) on VLAN 100, these frames exceed the default MTU and are dropped at the Ethernet interface. The 'Class-Platinum' system class with MTU 9216 is irrelevant because the vNIC is not mapped to it.
Exam trap
Cisco often tests the misconception that a system class with a higher MTU (like Class-Platinum) automatically applies to all traffic, when in fact the vNIC must be explicitly mapped to that QoS policy to use it.
How to eliminate wrong answers
Option B is wrong because a 'No Drop' policy (e.g., using pause frames or priority flow control) is not required for jumbo frames; the issue is the MTU mismatch, not the drop/no-drop setting. Option C is wrong because the server is sending frames of MTU 9000, which is less than the system class MTU of 9216, so the frames are not oversized for the system class. Option D is wrong because the native VLAN setting does not cause the QoS system class to be ignored; the vNIC's lack of a QoS policy assignment is the direct cause of defaulting to the best-effort class.
A storage administrator reports that a Cisco UCS domain is not booting from the Fibre Channel SAN. The boot policy is correctly configured and the vHBA is associated. Which two alignment issues could cause this problem? (Choose two.)
Proper WWPN zoning is critical for SAN boot.
Why this answer
If the WWPN of the vHBA is not properly zoned on the SAN fabric, the Fibre Channel switch will not allow the server to log in to the target storage. Even with a correct boot policy and vHBA association, without zoning, the initiator cannot discover or communicate with the boot LUN, causing the boot to fail.
Exam trap
The trap here is that candidates often focus only on the UCS-side configuration (boot policy, vHBA association) and forget that SAN fabric-level settings like zoning and VSAN assignment are equally critical for Fibre Channel boot to succeed.
A startup company is deploying a new web application on UCS B-Series blades. They want to use PXE boot for rapid provisioning. The network team has configured a DHCP server and a PXE server on the same VLAN as the UCS service profiles. The system administrator creates a service profile for a blade and sets the boot policy to 'PXE' as the first boot device, and local disk as second. However, when the blade powers on, it boots from the local disk instead of PXE. The PXE server logs show no request from the blade's MAC address. The DHCP server logs show no activity. The fabric interconnect is configured with a default VLAN. What is the most likely cause?
Native VLAN mismatch prevents DHCP from reaching the server
Why this answer
PXE boot requires the vNIC to have an untagged native VLAN that matches the PXE/DHCP subnet. If the native VLAN on the vNIC is different, DHCP requests are not forwarded. Option B wrong because PXE boot order is usually correct.
Option C wrong because it would cause different symptoms. Option D wrong because service profile association is fine.
An administrator needs to reset the CIMC password on a Cisco UCS C-Series server without physical access. Which method can be used?
Allows remote management commands, including password change.
Why this answer
The CIMC XML API allows remote management of Cisco UCS C-Series servers, including password resets, without physical access. This API provides a programmatic interface to CIMC functions, enabling administrators to send authenticated XML requests over HTTPS to reset the CIMC password. Physical access is not required because the API operates over the network, making it the correct method for this scenario.
Exam trap
Cisco often tests the distinction between UCS Manager (for B-Series and integrated environments) and CIMC (for C-Series standalone servers), leading candidates to incorrectly assume UCS Manager can manage C-Series servers directly.
How to eliminate wrong answers
Option A is wrong because the front panel reset button requires physical access to the server, which the administrator does not have. Option B is wrong because UCS Manager manages UCS B-Series blade servers and fabric interconnects, not C-Series standalone servers; C-Series servers are managed directly via CIMC, not through UCS Manager. Option D is wrong because connecting via serial console during boot requires physical access to the server's serial port or a remote console solution that is not available without physical presence.
An organization is deploying UCS Central to manage multiple UCS domains. Which THREE benefits does UCS Central provide over using individual UCS Managers?
UCS Central coordinates firmware upgrades for multiple domains.
Why this answer
UCS Central offers global policy management, centralized monitoring, and multi-domain firmware upgrades.
What is the purpose of a cluster witness VM in a HyperFlex cluster?
The witness VM helps maintain quorum when there are an even number of nodes.
Why this answer
The witness VM is used to achieve quorum in a two-node cluster (or to maintain quorum in case of network partitions). It is a lightweight VM that participates in cluster decision-making.
When configuring a UCS service profile for a blade server that needs to boot from the local disk, which boot order setting is appropriate?
Correct. Local disk is first and only boot device.
Why this answer
To boot from local disk, the boot policy should list the local disk as the first boot device. Other devices can be secondary or disabled.
In a UCS B-Series environment, where are vNICs and vHBAs defined to provide network and storage connectivity to a blade server?
Service profiles define the identity and policies for the server, including vNICs and vHBAs.
Why this answer
vNICs and vHBAs are defined in a service profile, which is then applied to a blade server to abstract the hardware identity.
A network engineer is configuring a UCS service profile for a B-series blade server that will boot from SAN. Which WWPN assignment method should be used to ensure the boot LUN remains accessible if the blade is replaced with another blade of the same type?
WWPNs from a pool are persistent and not tied to the physical hardware; the service profile retains the same WWPNs even if the blade is replaced.
Why this answer
Stateless computing in UCS relies on persistent WWPNs assigned from a WWPN pool, so when a blade is replaced, the new blade inherits the same WWPNs and can access the same storage LUNs without reconfiguration.
A HyperFlex cluster is being designed with 4 nodes using RF2. Which three statements are true about the cluster's data availability and management? (Choose three.)
Correct. The witness provides the tie-breaking vote to maintain cluster quorum.
Why this answer
With 4-node RF2, the cluster can tolerate one node failure. The witness VM provides quorum. A degraded cluster can still serve data until repaired.
A UCS administrator is planning to deploy stateless computing using service profiles. Which three components are abstracted from the physical hardware and defined in the service profile? (Choose three.)
Boot order is defined in the boot policy within the service profile.
Why this answer
Service profiles abstract the server identity, including UUID, MAC addresses, WWPNs, and boot order, allowing the profile to be applied to any compatible blade.
A HyperFlex cluster requires a cluster witness VM for quorum. The cluster is deployed with 5 nodes using RF2. If one node fails, the cluster remains operational. However, if a second node fails simultaneously, what determines whether the cluster remains available?
The witness VM is essential for quorum when multiple nodes fail.
Why this answer
The witness VM provides a tie-breaking vote. With RF2, if two nodes fail, the cluster can still maintain quorum if the witness is available. The witness is critical for clusters with even number of nodes or after failures.
An engineer is deploying a HyperFlex cluster with all-flash nodes and replication factor 3. What is the minimum number of converged nodes required for the cluster to be fully operational?
Correct. Three converged nodes are the minimum for RF3.
Why this answer
HyperFlex clusters require at least three converged nodes for RF3 to maintain data redundancy and quorum.
An engineer is configuring a Cisco UCS Manager deployment. The goal is to enforce the organization's security policy by limiting administrative access based on job roles. Which two actions should the engineer take? (Select two.)
Integrating with LDAP allows centralized management of user groups and roles, simplifying administration and security.
Why this answer
C is correct because integrating LDAP groups with RBAC allows the organization to enforce security policies by mapping directory groups to UCS roles, centralizing authentication and authorization. This approach ensures that administrative access is limited based on job roles without managing local users, aligning with the goal of role-based access control.
Exam trap
The trap here is that candidates often confuse RBAC with local user management or maintenance policies, assuming that disabling password defaults or using default policies somehow restricts access, when in fact RBAC requires explicit role definitions and user-to-role mappings.
During a capacity planning review, an engineer notices that a UCS domain with 8 blades (each with 16 cores) is using 70% CPU average. The environment runs VDI workloads. Each VM requires 2 vCPUs and 4 GB RAM. The hypervisor uses 1:1 CPU oversubscription. How many additional VMs can be deployed before reaching 100% CPU utilization?
38 remaining vCPUs / 2 per VM = 19.
Why this answer
The UCS domain has 8 blades × 16 cores = 128 cores. With 1:1 CPU oversubscription, the hypervisor can allocate 128 vCPUs. Each VM requires 2 vCPUs, so the maximum VMs are 128 / 2 = 64.
Currently at 70% CPU, 0.70 × 128 = 89.6 vCPUs are used, meaning 89.6 / 2 = 44.8 VMs (round to 45 VMs). The remaining vCPUs are 128 - 89.6 = 38.4, allowing 38.4 / 2 = 19.2 additional VMs, so 19 VMs can be deployed before hitting 100% CPU utilization.
Exam trap
Cisco often tests the trap of confusing CPU utilization percentage with the number of vCPUs already allocated, leading candidates to incorrectly calculate remaining capacity by applying the percentage to the total VM count rather than to the total vCPU count.
How to eliminate wrong answers
Option B (23) is wrong because it incorrectly assumes a higher oversubscription ratio (e.g., 1.5:1) or miscalculates the remaining vCPUs. Option C (17) is wrong because it likely uses a lower total core count (e.g., 112 cores) or misapplies the 70% utilization to total VMs instead of vCPUs. Option D (21) is wrong because it might result from rounding errors or using 75% utilization instead of 70%.
In a Cisco UCS B-Series environment, which component provides the physical connectivity between blade chassis and Fabric Interconnects?
IOMs provide uplink ports to Fabric Interconnects.
Why this answer
The I/O Module (IOM) in the 5108 blade chassis connects to Fabric Interconnects via server ports, handling data traffic from blades to the FIs.
Which component in a UCS B-series chassis provides the connectivity between blade servers and the Fabric Interconnects?
Correct. IOMs provide uplinks from the chassis to the FIs.
Why this answer
I/O Modules (IOMs) in the chassis connect blades to the Fabric Interconnects via server ports.
What is the purpose of a witness VM in a HyperFlex cluster?
Witness ensures quorum in failure scenarios.
Why this answer
In a HyperFlex cluster, the witness VM provides a tie-breaking vote for cluster quorum decisions when the cluster experiences a network partition or node failure. It ensures that the surviving side can maintain a majority and continue operating, preventing split-brain scenarios where both sides would independently write data.
Exam trap
Cisco often tests the distinction between the witness VM's quorum role and the management or storage functions of other components, leading candidates to confuse it with the HyperFlex Management Controller or a storage node.
How to eliminate wrong answers
Option B is wrong because the management node in a HyperFlex cluster is the HyperFlex Management Controller (HXMC), not the witness VM; the witness VM is solely for quorum. Option C is wrong because the witness VM does not provide storage capacity; it is a lightweight VM that consumes minimal resources and does not participate in the data plane. Option D is wrong because data replication across sites is handled by HyperFlex stretch clusters using synchronous replication, not by the witness VM, which only provides quorum in a single-site or stretched-cluster scenario.
An engineer is troubleshooting a UCS blade server that fails to boot from SAN. The server is associated with a service profile that includes a SAN connectivity policy. Which two items should be verified to ensure the boot from SAN works? (Choose two.)
If local disk is first, it may attempt to boot from there.
Why this answer
For boot from SAN, the WWPNs must be correctly assigned and the boot policy must list the SAN path as the first boot device. Also, zoning on the SAN switch is required but that is external.
A UCS administrator is deploying a 3-node HyperFlex cluster with vSphere. Each node has a single vNIC for management and two vNICs for storage data traffic. During the cluster creation, the storage vNIC MTU must be configured. What is the recommended MTU value for the storage data vNICs in HyperFlex?
Recommended for HyperFlex storage data.
Why this answer
C is correct because HyperFlex storage data vNICs require jumbo frame support to optimize storage traffic performance. The recommended MTU value for these vNICs is 9000, which allows larger packet sizes and reduces CPU overhead for storage I/O operations. This value is consistent with Cisco's best practices for HyperFlex cluster deployments.
Exam trap
Cisco often tests the specific recommended MTU value of 9000 for HyperFlex storage vNICs, and the trap here is that candidates may confuse it with the maximum jumbo frame size of 9216 supported by some switches, or assume the standard 1500 MTU is sufficient for storage traffic.
How to eliminate wrong answers
Option A is wrong because an MTU of 1500 is the standard Ethernet MTU and does not support jumbo frames, which are necessary for efficient storage traffic in HyperFlex. Option B is wrong because 9216 is a common jumbo frame MTU value for some Cisco switches, but HyperFlex specifically recommends 9000, not 9216, for storage vNICs. Option D is wrong because 4096 is not a standard jumbo frame MTU value; it is too small to provide the benefits of jumbo frames and is not recommended by Cisco for HyperFlex storage data traffic.
An engineer has configured a service profile with a WWPN pool that has exhausted its assigned range. The server boots from SAN. What happens when the server is associated?
Correct behavior.
Why this answer
When a WWPN pool is exhausted, Cisco UCS automatically assigns a temporary WWPN from the conflict-free range (00:00:00:00:00:00 to 00:00:00:00:00:FF) to allow the server to associate and boot from SAN. This temporary WWPN is used only until a permanent WWPN becomes available from the pool, ensuring the server can still access storage during the interim period.
Exam trap
Cisco often tests the misconception that pool exhaustion causes association failure, but the correct behavior is that UCS uses a temporary WWPN from the conflict-free range to maintain boot-from-SAN functionality.
How to eliminate wrong answers
Option A is wrong because the server does associate and boot successfully using a temporary WWPN from the conflict-free range, not fail due to no WWPN assignment. Option B is wrong because Cisco UCS does not prompt for manual entry; it automatically assigns a temporary WWPN from the conflict-free range. Option C is wrong because the association does not fail; it proceeds with a temporary WWPN, and new WWPNs can be added to the pool later without disrupting the association.
A UCS administrator needs to update the firmware on a UCS 5108 chassis that contains eight B-Series blades. The firmware update must be performed with minimal downtime. Which update method should be used?
This method allows the administrator to control when blades reboot, minimizing downtime by staggering reboots.
Why this answer
The User Acknowledged update method, combined with a maintenance policy that reboots blades sequentially, allows the firmware update to proceed blade by blade with minimal downtime. This approach ensures that only one blade is offline at a time, while the remaining blades continue to serve traffic, making it ideal for a chassis with eight B-Series blades where service continuity is critical.
Exam trap
Cisco often tests the distinction between 'User Acknowledged' and 'Non-Impactful' updates, trapping candidates who mistakenly think that a non-impactful update can include a forced reboot, when in fact any reboot makes the update impactful.
How to eliminate wrong answers
Option A is wrong because Fast-Impact update is designed for scenarios where immediate, disruptive updates are acceptable, not for minimizing downtime. Option B is wrong because Non-Impactful update with a forced reboot contradicts the definition of a non-impactful update, which should not require a reboot; a forced reboot would cause unnecessary downtime. Option D is wrong because System-Impactful update with a single reboot would take the entire chassis or all blades offline simultaneously, resulting in maximum downtime, which is the opposite of the requirement.
An engineer is configuring a UCS service profile for a blade that will boot from local disk. The blade has two SAS drives configured as a RAID 1 mirror. Which policy is required to specify the local disk boot order?
Boot policy specifies the boot order including local disk.
Why this answer
The boot policy in a service profile defines the boot order and boot devices. For local disk boot, the boot policy must list the local disk as the primary boot device.
In a Cisco HyperFlex cluster, which component is responsible for ensuring data redundancy and consistency across nodes, and typically requires a separate VM for proper operation?
The witness VM provides arbitration for cluster membership.
Why this answer
The cluster witness VM (arbiter) is used in HyperFlex for quorum decisions and to prevent split-brain scenarios, especially with RF2.
Which TWO statements accurately describe Cisco UCS service profiles? (Choose two.)
Templates provide standard configurations.
Why this answer
Service profiles abstract hardware and are template-based for consistency.
A UCS blade server has two vHBAs configured. The storage array is connected to both Fabric Interconnects. Which multipathing configuration should be used on the host to provide path redundancy without needing additional storage ports?
Active/active allows both paths to be used concurrently.
Why this answer
With two vHBAs connected to two separate FIs, the host can use active/active multipathing (e.g., ALUA or symmetric) to utilize both paths simultaneously for redundancy and load balancing.
Which of the following correctly describes the role of Fabric Interconnects A and B in a UCS domain?
Correct. They provide redundant connectivity and management.
Why this answer
Fabric Interconnects A and B operate in an active-active or active-standby configuration to provide redundancy for both management and data traffic. Each FI connects to all IOMs, but each IOM is associated with one FI (fabric A or B) for failover.
Which TWO methods can be used to manage Cisco UCS C-series rack servers out-of-band? (Choose two.)
IMC Supervisor provides centralized management for multiple C-series.
Why this answer
CIMC and IMC Supervisor are out-of-band management tools for C-series.
A UCS administrator needs to ensure that server boot order always starts from the local disk if available, and falls back to a SAN LUN if local disk fails. Which boot policy setting should be used?
Matches the requirement.
Why this answer
The UCS boot policy allows you to specify a boot order where the local disk is attempted first. If the local disk is unavailable or fails, the system automatically falls back to the next boot device in the list, which is the SAN LUN. This ensures high availability and aligns with the requirement to prefer local boot while providing a failover path.
Exam trap
Cisco often tests the misconception that 'SAN first, then Local Disk' provides a fallback to local disk, but the trap is that the order is reversed, causing the server to always boot from SAN first, which does not satisfy the requirement to prefer local disk when available.
How to eliminate wrong answers
Option A is wrong because 'Local Disk alone' provides no fallback if the local disk fails, leaving the server unable to boot. Option B is wrong because 'SAN first, then Local Disk' reverses the required order, causing the server to always attempt SAN boot before local disk, which does not meet the requirement to start from local disk if available. Option C is wrong because 'SAN Boot Only' forces boot exclusively from the SAN LUN with no option to boot from local disk, even if the local disk is functional.
Order the steps to configure FCoE on a Cisco Nexus switch with NPV mode.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Why this order
FCoE requires feature fcoe, VSAN mapping, VLAN config, NPV mode, and fabric login.
A network engineer needs to replace a failed UCS B-Series blade server with a new blade of the same model. The original blade had a custom service profile with specific vNIC and vHBA settings. What is the most efficient method to apply the same configuration to the new blade without manual reconfiguration?
Correct. This applies all settings automatically.
Why this answer
UCS service profiles abstract hardware configuration. By disassociating the profile from the failed blade and associating it with the new blade, all settings (vNICs, vHBAs, policies) are automatically applied, supporting stateless computing.
Which TWO are important considerations when using Cisco UCS Central for multi-domain management? (Select TWO.)
This is a key feature of UCS Central.
Why this answer
Cisco UCS Central allows administrators to define global policies that can be applied across multiple UCS domains, while still permitting local overrides at the UCS Manager level. This hierarchical policy model provides centralized control without sacrificing the flexibility needed for domain-specific configurations, such as unique VLANs or boot policies.
Exam trap
Cisco often tests the misconception that UCS Central enforces strict homogeneity across domains, but the correct understanding is that it supports heterogeneous environments with flexible policy inheritance and local overrides.
A HyperFlex cluster uses replication factor 3 (RF3) and consists of 4 all-flash nodes. One node fails permanently. After replacing the node, the cluster re-replicates data. What is the minimum number of additional node failures that can be tolerated without data loss after re-replication completes?
With RF3, two simultaneous failures are tolerable without data loss.
Why this answer
With RF3 (three copies of data), the cluster can tolerate up to two simultaneous failures (quorum requires at least two copies). After replacing the failed node, the cluster returns to full health, so again can tolerate two failures. However, if the cluster originally had 4 nodes and one fails, only 3 remain; if another fails during re-replication, data could be at risk.
But after re-replication, 4 nodes exist, so two failures are tolerable.
Refer to the exhibit. An administrator notices the blade firmware is outdated. What is the recommended first step to update the blade firmware?
Allows orchestrated update across all blades with minimal disruption.
Why this answer
Cisco UCS Manager uses firmware management policies to stage firmware updates across blades in a controlled, non-disruptive manner. Staging the update allows the administrator to schedule the activation during a maintenance window, ensuring all blades receive the same firmware version consistently without immediate impact on production traffic.
Exam trap
The trap here is that candidates often assume a direct, immediate action like rebooting or manual updates is required, but Cisco tests the understanding that UCS Manager provides a policy-based staging mechanism to safely orchestrate firmware updates across multiple blades.
How to eliminate wrong answers
Option A is wrong because upgrading fabric interconnects first is not the recommended first step for blade firmware; fabric interconnect firmware updates are independent and should be coordinated but not necessarily performed before blade updates. Option B is wrong because updating each blade individually using the CIMC is inefficient, error-prone, and bypasses the centralized management capabilities of UCS Manager, which can automate and validate the update process. Option C is wrong because rebooting all blades immediately without staging the firmware could cause unexpected downtime and service disruption, and it does not address the need to actually update the firmware.
In a Cisco HyperFlex cluster, a new ESXi host is being added. The host is discovered, but the cluster health status shows 'Degraded'. What should be the first troubleshooting step?
Firmware consistency is critical for cluster stability.
Why this answer
When adding a new ESXi host to a Cisco HyperFlex cluster, the controller VM (CVM) firmware version must match the cluster's version. A mismatch causes the cluster health status to show 'Degraded' because the CVMs cannot properly synchronize storage operations. Verifying and aligning the firmware version is the first troubleshooting step, as it directly impacts cluster stability.
Exam trap
Cisco often tests the misconception that a 'Degraded' cluster health status is due to network or vCenter issues, when in fact it frequently stems from firmware or software version mismatches in the HyperFlex storage layer.
How to eliminate wrong answers
Option A is wrong because rebooting the new ESXi host will not resolve a firmware version mismatch; it only restarts services without addressing the root cause. Option C is wrong because vCenter Server maintenance mode affects vCenter operations, not HyperFlex cluster health; a host in maintenance mode would not cause a 'Degraded' status due to firmware mismatch. Option D is wrong because deleting and re-creating the cluster is an extreme, unnecessary step that would disrupt operations; the issue is isolated to the new host's CVM firmware, not the cluster configuration.
An engineer is configuring a HyperFlex cluster with three nodes. Which three components are required for a functional cluster? (Choose three.)
HyperFlex runs on a hypervisor; vSphere is the most common.
Why this answer
HyperFlex requires at least three storage nodes for RF2, a vSphere cluster, and the HX Data Platform. A witness is needed for clusters with even number of nodes or for RF3? Actually for 3 nodes, witness is optional if RF2? Standard deployment: 3 nodes form a cluster; the witness is optional for 3 nodes but often recommended. The question expects the core components: storage nodes, vSphere, and HXDP.
Witness is not mandatory for 3-node RF2 clusters.
An engineer is configuring a UCS service profile for PXE boot. The server must obtain an IP address from a DHCP server and then download the OS image from a TFTP server. Which boot policy parameters must be configured?
The LAN boot entry enables PXE boot on the specified vNIC.
Why this answer
PXE boot requires specifying the LAN boot option with the appropriate vNIC. In UCS, the boot policy can include a PXE boot entry that references a vNIC. DHCP and TFTP servers are configured externally; the boot policy just needs to enable PXE on the correct interface.
A company is deploying a new Cisco UCS Mini. They need to ensure that the chassis can be managed from either fabric interconnect. What configuration is required to achieve this?
This allows the chassis to be reachable from both FIs for management purposes.
Why this answer
Cisco UCS Mini requires a dedicated management VLAN to be configured on both fabric interconnects, and chassis management must be enabled on that VLAN. This allows the chassis management controller (CMC) to be reachable from either FI, enabling active/standby management redundancy without relying on a single point of control.
Exam trap
The trap here is that candidates often confuse in-band management (Option B) with the required out-of-band management VLAN configuration, mistakenly thinking that using the data path is sufficient for redundant chassis management.
How to eliminate wrong answers
Option A is wrong because private VLANs are used to isolate traffic within a VLAN (e.g., for multi-tenant environments) and are not required for chassis management redundancy in UCS Mini. Option B is wrong because in-band management mode is used for managing the chassis through the data path (e.g., via a server's vNIC), not for enabling management from either fabric interconnect; the correct approach is out-of-band management via a dedicated management VLAN. Option C is wrong because FC-Zoning is a Fibre Channel storage networking concept used to control access in a SAN fabric and has no role in enabling chassis management from either FI.
A UCS administrator needs to perform a firmware upgrade on a UCS B-Series blade server. Which management interface should be used to perform the upgrade remotely?
Correct. UCS Manager manages firmware for all components.
Why this answer
UCS Manager provides centralized firmware management for all blades and FIs. The administrator can initiate firmware updates through UCS Manager GUI or CLI, which handles the upgrade process across the domain.
An engineer is configuring a UCS service profile for a blade server that will boot from SAN. The storage is connected via FC SAN. Which policy must be included in the service profile to define the WWPNs for the HBAs?
SAN connectivity policy specifies the vHBA configuration, including WWPN assignment.
Why this answer
To boot from SAN, the service profile must include a SAN connectivity policy that defines the WWPNs (World Wide Port Names) for the vHBAs. This policy assigns WWPNs from a pool or statically.
A UCS domain is experiencing intermittent storage connectivity. The storage admin confirms the SAN is properly zoned and the VSANs are configured. The UCS admin finds that the host interface (HBAs) are showing 'Link Down' intermittently. Which of the following is a likely cause?
Physical layer issues often cause intermittent link flapping.
Why this answer
Intermittent 'Link Down' on HBAs, despite correct SAN zoning and VSAN configuration, strongly points to a physical-layer issue. Faulty SFPs or damaged cables cause intermittent link flaps, which manifest as sporadic HBA link-down events. This is the most common cause of such symptoms in UCS environments.
Exam trap
Cisco often tests the distinction between physical-layer issues (SFP/cable) and configuration or policy errors, tempting candidates to overthink with fabric failover or interface mode when the symptom is a simple link flap.
How to eliminate wrong answers
Option A is wrong because incompatible HBA firmware typically causes persistent driver errors or failure to log in to the fabric, not intermittent link flaps. Option B is wrong because mismatched fabric failover policy affects how traffic is redirected during a failure, not the physical link state of the HBA. Option C is wrong because incorrect Fibre Channel interface mode on the FI (e.g., End Host vs.
Switching mode) impacts upstream FLOGI behavior and zoning, not the point-to-point link status between the HBA and the FI.
A UCS domain has two fabric interconnects in end-host mode. The engineer needs to implement a policy that ensures all traffic from a specific vNIC is load-balanced across both uplinks to the upstream switches. Which type of policy should be used?
Allows pinning a vNIC to specific uplinks or 'no-pin' for load balancing across all.
Why this answer
In a UCS domain with fabric interconnects in end-host mode, a Pin Group policy is used to explicitly map a vNIC's traffic to specific uplink ports, ensuring load balancing across the upstream switches. This policy overrides the default MAC-based hashing and allows the engineer to control traffic distribution, which is critical for consistent performance and redundancy.
Exam trap
Cisco often tests the distinction between Pin Group policies (which control per-vNIC traffic distribution) and Link Aggregation policies (which bundle ports), leading candidates to mistakenly choose the latter when the question emphasizes load balancing across individual uplinks rather than aggregated bandwidth.
How to eliminate wrong answers
Option A is wrong because a Link Aggregation policy (LACP) bundles multiple uplinks into a single logical link for increased bandwidth and redundancy, but it does not control per-vNIC traffic distribution across individual uplinks; it operates at the port-channel level. Option C is wrong because a QoS policy manages traffic prioritization and bandwidth allocation, not load balancing or path selection for a specific vNIC. Option D is wrong because a Network Control policy defines Layer 2 features like STP or LLDP, but it does not influence how vNIC traffic is pinned or load-balanced across uplinks.
A company recently deployed Cisco UCS B-Series blades with a single Fabric Interconnect. During a maintenance window, the Fabric Interconnect must be upgraded. Which action ensures minimal disruption to running workloads?
Gracefully shutting down the blades ensures workloads are safely stopped. After the FI upgrade, powering on the blades restores service. This is the correct procedure for a single FI.
Why this answer
In a single Fabric Interconnect domain, there is no redundancy. Disassociating service profiles while blades are running causes loss of management connectivity and potential network disruption. The only way to perform the upgrade without risking data corruption is to schedule a maintenance window: gracefully shut down all blades, upgrade the Fabric Interconnect, then power on the blades.
This ensures workloads are safely stopped and restarted after the upgrade.
Exam trap
A common trap is to assume that disassociating service profiles allows a non-disruptive upgrade. In reality, for a single FI, this causes loss of connectivity and service disruption. The correct procedure requires a maintenance window with blade shutdown.
How to eliminate wrong answers
Option B is wrong because migrating service profiles to a second Fabric Interconnect requires a second Fabric Interconnect to be present, but the scenario specifies a single Fabric Interconnect, making this option technically impossible. Option C is wrong because shutting down all blades gracefully causes a complete outage for all running workloads, which is not minimal disruption. Option D is wrong because changing the boot order to boot from an NFS image does not address the Fabric Interconnect upgrade; the blades still rely on the Fabric Interconnect for network connectivity, and the upgrade would disrupt that connectivity.
An engineer is designing a UCS Mini deployment for a remote office. The chassis will contain four blade servers. Each server needs two 10GbE connections for data and one 1GbE for management. What is the minimum number of fabric interconnects required?
UCS Mini can operate with a single FI for up to four blades, meeting the requirement.
Why this answer
A single UCS Mini fabric interconnect (FI) can provide both data and management connectivity for up to eight blade servers in a single chassis. Each blade server requires two 10GbE data connections (from the integrated VIC) and one 1GbE management connection (from the Cisco Integrated Management Controller, or CIMC). The FI aggregates these connections internally, so one FI is sufficient for a four-server deployment, as UCS Mini supports a single FI configuration for non-redundant setups.
Exam trap
Cisco often tests the misconception that each blade server's management connection requires a separate physical port or that two FIs are always needed for any UCS deployment, but UCS Mini's integrated architecture allows a single FI to handle both data and management for up to eight blades.
How to eliminate wrong answers
Option B is wrong because three fabric interconnects are not supported in UCS Mini; the architecture only supports one or two FIs for redundancy. Option C is wrong because four fabric interconnects exceed the maximum supported in any UCS Mini configuration (max two). Option D is wrong because two fabric interconnects are only required for redundancy (e.g., for high availability or dual-homing), not for meeting the minimum connectivity needs of four blade servers; the question asks for the minimum number.
Which TWO statements about Cisco UCS service profiles are correct? (Choose TWO.)
Firmware policies can be included.
Why this answer
Cisco UCS service profiles can include firmware management policies that specify the firmware versions to be applied to the associated server components, such as adaptors, BIOS, and storage controllers. This allows administrators to enforce consistent firmware levels across the infrastructure without manual intervention.
Exam trap
Cisco often tests the misconception that service profiles are hardware-specific or only apply to B-Series blades, when in fact they are designed to be hardware-agnostic and support both blade and rack server form factors.
A network engineer is configuring a UCS service profile for a new blade server. The requirement is that if the blade fails, it can be replaced with any blade of the same model without reconfiguration. Which UCS feature enables this capability?
Stateless computing decouples the server identity from the hardware, enabling swap without reconfiguration.
Why this answer
Stateless computing in UCS abstracts the hardware identity and configuration via service profiles, allowing a replacement blade to inherit the same configuration without manual reconfiguration.
A UCS domain has two Fabric Interconnects (FI-A and FI-B) in a redundant configuration. A blade server is configured with two vNICs: one for FI-A and one for FI-B. What happens if FI-A fails?
The NIC teaming or failover mechanism (e.g., active-backup) will use the second vNIC.
Why this answer
When FI-A fails, the blade server's vNIC connected to FI-A becomes unavailable. However, because the vNICs are configured in a redundant pair (active/standby or active/active with failover), the operating system or the Cisco UCS Manager's NIC teaming policy automatically fails over traffic to the vNIC connected to FI-B. This is achieved through the use of MAC address pinning and the failover mechanism inherent in the Cisco UCS fabric interconnect architecture, ensuring continuous network connectivity without manual intervention.
Exam trap
The trap here is that candidates often assume a single vNIC failure causes total connectivity loss (Option B) or that UCS automatically re-pins vNICs to the surviving fabric (Option C), when in fact the failover is handled by the server's NIC teaming software, not by the fabric interconnects themselves.
How to eliminate wrong answers
Option B is wrong because the blade does not lose all network connectivity; the redundant vNIC on FI-B takes over the traffic seamlessly. Option C is wrong because the vNIC connected to FI-A is not reconnected to FI-B; it remains associated with the failed FI-A and is simply taken out of service, while the vNIC on FI-B continues to operate independently. Option D is wrong because the blade does not continue to use the vNIC on FI-A after its fabric interconnect fails; that vNIC becomes non-functional, and traffic is failed over to the vNIC on FI-B, which then handles all traffic without redundancy until FI-A is restored.
A UCS B-Series blade server shows high CPU latency when processing network I/O. The engineer suspects a bottleneck in the I/O subsystem. Which metric in UCS Manager should be examined first?
Errors cause retransmissions and latency
Why this answer
Fabric port error counts directly reflect physical-layer issues (e.g., CRC errors, alignment errors, link flaps) that cause retransmissions and backpressure, leading to high CPU latency on the blade server. In UCS Manager, these counters are the first place to check when suspecting an I/O subsystem bottleneck because they pinpoint problems in the fabric interconnect or cabling before examining higher-layer metrics.
Exam trap
Cisco often tests the distinction between utilization metrics (which show load) and error metrics (which show health), so candidates mistakenly pick vNIC utilization thinking high usage equals a bottleneck, when the real issue is physical-layer errors causing retransmissions.
How to eliminate wrong answers
Option A is wrong because vNIC utilization percentage measures throughput usage, not errors or latency; high utilization alone does not cause CPU latency unless accompanied by errors or congestion. Option C is wrong because memory usage statistics indicate system memory pressure, which can affect overall performance but is not specific to the I/O subsystem or network latency. Option D is wrong because power consumption per server relates to thermal or power capacity issues, not to network I/O latency or fabric errors.
An engineer is configuring a UCS server profile for a database application that requires low latency. The server will use a Cisco UCS VIC 1340 adapter. Which vNIC placement policy should be selected to minimize latency?
Assigned placement pins the vNIC to a specific adapter port, reducing latency.
Why this answer
The Assigned vNIC placement policy binds each vNIC to a specific physical port on the Cisco UCS VIC 1340 adapter, ensuring deterministic traffic flow and predictable latency. For low-latency database applications, this eliminates the variability introduced by dynamic placement, allowing the engineer to align vNICs with the most direct PCIe path to the CPU or memory.
Exam trap
Cisco often tests the misconception that Round-Robin provides load balancing for low latency, but the trap here is that Round-Robin optimizes for bandwidth distribution, not latency minimization, and the Assigned policy is the only one that guarantees fixed path placement for deterministic performance.
How to eliminate wrong answers
Option B (Any) is wrong because it allows the system to dynamically assign vNICs to any available physical port, which can introduce latency variation and suboptimal traffic distribution. Option C (Default) is wrong because it typically applies a system-defined policy that may not guarantee the deterministic placement required for low-latency workloads. Option D (Round-Robin) is wrong because it distributes vNICs sequentially across ports without considering latency sensitivity, potentially causing mismatched traffic patterns and increased jitter.
Which type of I/O module (IOM) is installed in a UCS 5108 blade chassis to provide connectivity between blade servers and the fabric interconnects?
The IOMs in UCS chassis are essentially fabric extenders that extend the FI fabric to the blades.
Why this answer
The IOMs in a 5108 chassis connect the blade midplane to the fabric interconnects via server ports. There are typically two IOMs for redundancy.
Refer to the exhibit. A UCS B-Series blade shows a failed power supply. The blade is currently running. Which action should the engineer take to replace the power supply without causing service disruption?
The blade has redundant power supplies; hot-swap is supported.
Why this answer
UCS B-Series blades use a shared chassis power infrastructure with N+1 redundancy. The failed power supply can be hot-swapped while the blade remains powered on, as the remaining power supplies in the chassis will continue to provide power without interruption. No blade isolation or shutdown is required, as the chassis power subsystem is designed for concurrent maintenance.
Exam trap
Cisco often tests the misconception that a blade must be shut down or isolated before replacing a chassis-level component, but the key is understanding that UCS chassis power supplies are hot-swappable and redundant, so no blade-level action is needed.
How to eliminate wrong answers
Option A is wrong because isolating the blade from the fabric (disconnecting its virtual interfaces) is unnecessary for power supply replacement; the blade's power is independent of fabric connectivity. Option B is wrong because it implies the power supply can be replaced without any effect on the blade, but the correct procedure is to replace it while the blade is powered on, not just 'without affecting the blade' — the phrasing is misleading as the blade remains powered on during replacement. Option C is wrong because shutting down the blade is not required; the chassis power redundancy allows hot-swap of the power supply without powering down any blade.
Which component connects a UCS 5108 blade chassis to the Fabric Interconnects?
IOMs link the chassis to Fabric Interconnects.
Why this answer
IOMs (Input/Output Modules) in the chassis provide connectivity to the FIs.
You manage a UCS domain with two fabric interconnects (FI-A and FI-B) in an cluster. The domain contains 8 blade servers. After a power failure, both FIs come back online, but the cluster experiences a split-brain situation where both FIs claim to be primary. The subordinate FI (FI-B) shows all blades as 'Discovery' state. You suspect configuration mismatch. You have console access to both FIs. Which recovery procedure should be performed to restore a stable cluster?
Standard UCS split-brain recovery procedure
Why this answer
In a UCS split-brain scenario where the subordinate FI (FI-B) shows blades in 'Discovery' state due to a configuration mismatch, the proper recovery is to boot FI-B into recovery mode (using the 'recovery' boot option or pressing Ctrl+R at the appropriate prompt) and force a re-initialization, which resets its configuration to match the primary FI (FI-A). After re-initialization, resetting the cluster (via the 'cluster reset' command or equivalent) re-establishes the primary-subordinate relationship and synchronizes the configuration, restoring stable operation without affecting the primary FI's data or requiring a full factory reset.
Exam trap
Cisco often tests the misconception that a split-brain scenario requires a full factory reset or flash clearing, when in fact the targeted recovery of the subordinate FI via recovery mode and cluster reset is the correct, less destructive procedure.
How to eliminate wrong answers
Option A is wrong because resetting both FIs to factory defaults is overly destructive and unnecessary; it would lose all configuration on the primary FI (FI-A) and require a full backup restore, whereas the issue is isolated to the subordinate FI's configuration mismatch. Option B is wrong because booting into the EFI shell and clearing the flash is a low-level hardware recovery method typically used for unbootable FIs or firmware corruption, not for resolving a split-brain cluster state caused by configuration mismatch; it would erase all firmware and configuration, requiring a complete reimage. Option C is wrong because performing a stateful switchover (SSO) on both FIs is designed for planned maintenance or failover in a stable cluster, not for recovery from a split-brain scenario; SSO assumes both FIs are synchronized and operational, which they are not in this case.
An administrator needs to replace a faulty UCS B200 M5 blade with a new blade of the same model. The original blade had a service profile associated. What is the minimum required action to allow the new blade to take over the workload with the same configuration?
This applies the same configuration to the new blade.
Why this answer
UCS service profiles provide hardware abstraction, making blades stateless. Simply inserting the new blade will not automatically associate the profile; the administrator must re-associate the service profile with the new blade. No other reconfiguration is needed if the new blade is identical.
Which TWO components are required in a HyperFlex cluster to provide both compute and storage functionality?
SCVM provides the storage data plane.
Why this answer
HyperFlex converged nodes provide both compute and storage. The controller VM (SCVM) manages storage, and the hypervisor (e.g., ESXi) runs workloads.
A UCS B-Series blade server (blade 5) has been running a database application for months. Recently, the storage team upgraded the SAN firmware. Since then, the blade experiences intermittent 'SCSI command timeout' errors in the system logs. The application performance degrades periodically. You check the UCS Manager performance data and see that the vHBA statistics show a high number of 'Link Reset' events. The storage array logs show no errors. The fibre channel cables are new. Which step should you take to resolve the issue?
Firmware mismatch after SAN upgrade is a common cause
Why this answer
The SAN firmware upgrade likely introduced a change in the Fibre Channel protocol behavior (e.g., link initialization or error recovery) that is incompatible with the current HBA firmware on the blade. The high 'Link Reset' events indicate that the vHBA is repeatedly reinitializing the link, which directly causes SCSI command timeouts. Updating the HBA firmware to match the SAN compatibility matrix ensures the HBA can properly negotiate and interoperate with the upgraded SAN fabric, resolving the intermittent timeouts.
Exam trap
The trap here is that candidates assume physical cabling or zoning is the cause of link resets, but Cisco often tests the concept that firmware mismatches after a SAN upgrade can cause intermittent FC link issues without any physical layer faults.
How to eliminate wrong answers
Option A is wrong because deleting and recreating the vHBA would not address the underlying firmware incompatibility; it would only reset the vHBA configuration, which would likely result in the same link reset behavior. Option B is wrong because the fibre channel cables are new and the storage array logs show no errors, indicating the physical layer is not the issue. Option D is wrong because rezoning the SAN fabric to use a different target port would not fix the HBA-to-switch link reset problem; the issue is at the HBA level, not the zoning or target port selection.
A data center engineer notices that a UCS B-Series blade server is failing to boot from a SAN LUN that is correctly mapped to the server's WWPN. The SAN switch shows that the LUN is accessible and the zone is configured correctly. The UCS Manager shows the server's vNIC is associated with a vHBA that has the correct WWPN, but the server's BIOS does not list the Fibre Channel boot target. Which configuration is most likely missing?
UCS B-Series requires a boot policy to specify the boot order and target LUN.
Why this answer
The boot policy defines the boot order and parameters (such as the SAN LUN target WWPN and LUN ID) for the server. If the boot policy is not defined or not attached to the service profile, the UCS Manager will not program the BIOS with the Fibre Channel boot target information, even though the SAN zoning and vHBA WWPN are correct. Without this policy, the server's BIOS has no instruction to attempt a SAN boot, resulting in the failure described.
Exam trap
Cisco often tests the distinction between SAN connectivity (zoning, WWPN) and the boot policy configuration, trapping candidates who assume that correct zoning and vHBA setup alone are sufficient for SAN boot.
How to eliminate wrong answers
Option A is wrong because the SAN connectivity policy with Fibre Channel uplink pinning controls how uplinks are mapped to fabric interconnects for load balancing or failover, not the boot target configuration. Option B is wrong because the vNIC/vHBA placement policy set to 'Express' mode affects how virtual interfaces are placed on the mezzanine cards or adapters, but does not prevent the BIOS from seeing a Fibre Channel boot target. Option C is wrong because a QoS policy applied to a vHBA manages traffic prioritization and bandwidth limits, not the presence or absence of a boot LUN in the BIOS boot list.
Refer to the exhibit. An engineer notices intermittent packet loss on interface Ethernet 1/1 of the Fabric Interconnect. Based on the transceiver statistics shown, which condition is the most likely cause?
The receive power is -16.3 dBm, which is below the low warning threshold of -13.3 dBm, indicating a weak optical signal causing packet loss.
Why this answer
The exhibit shows that the receive power is -16.3 dBm, which is below the low warning threshold of -13.3 dBm. This indicates the incoming optical signal is too weak, causing intermittent packet loss due to bit errors or link flaps. The transceiver statistics confirm that the receive power is the only parameter breaching its threshold, making it the most likely cause.
Exam trap
Cisco often tests the distinction between warning and alarm thresholds, and candidates mistakenly assume any parameter outside a threshold causes the issue, but here only the receive power is below its warning threshold, while the other values are within normal ranges.
How to eliminate wrong answers
Option B is wrong because the supply voltage is 3.29 V, which is within the normal operating range (typically 3.1 V to 3.5 V for SFP+ optics), so it is not out of range. Option C is wrong because the transmit power is -2.4 dBm, which is above the low warning threshold of -5.3 dBm, indicating the transmitter is functioning correctly. Option D is wrong because the transceiver temperature is 42.5°C, which is well below the high warning threshold of 75°C, so overheating is not an issue.
Order the steps for troubleshooting a Fibre Channel link that is not coming up.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Why this order
Troubleshooting FC link starts with physical, then interface, VSAN/zoning, FLOGI, and logs.
Which component in a UCS 5108 blade chassis provides the connectivity between the blade servers and the Fabric Interconnects?
IOMs provide the network connectivity between blades and FIs.
Why this answer
The I/O Module (IOM) in the UCS 5108 chassis provides the uplink ports that connect to the Fabric Interconnects and the downlink ports that connect to the blade servers.
In a UCS service profile, which construct is used to abstract the network interface configuration so that the same profile can be used with different blade models?
vNIC templates provide standardized network interface configurations.
Why this answer
vNIC templates define network interface properties (MAC address, VLANs, fabric assignment) and can be policy-based, allowing hardware abstraction.
A network engineer is configuring a new UCS B-series blade server. The engineer wants the server to automatically inherit network and storage settings without manual configuration when replaced. Which UCS technology enables this capability?
Service profiles and templates provide hardware abstraction, enabling stateless computing.
Why this answer
Service profile templates in Cisco UCS Manager allow administrators to define a reusable configuration for network and storage settings. When a server fails or is replaced, the template is applied to the new blade, automatically inheriting all settings without manual intervention. This capability is central to UCS's stateless computing model, where hardware identity and policies are abstracted from the physical server.
Exam trap
Cisco often tests the distinction between the management platform (UCS Manager) and the specific feature (service profile template) that enables stateless computing and automatic configuration inheritance.
How to eliminate wrong answers
Option B is wrong because Fabric Interconnect failover provides high availability for the UCS fabric, not automatic server configuration inheritance upon replacement. Option C is wrong because Cisco IMC Supervisor is a management tool for standalone (non-UCS) servers, not for B-series blades in a UCS domain. Option D is wrong because Cisco UCS Manager is the overall management platform, but the specific feature that enables automatic inheritance of settings on server replacement is the service profile template, not the manager itself.
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