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Question 221. What is a primary benefit of an MDS Fibre Channel port channel
- Creates server UUIDs
- Replaces VSANs
- Increases bandwidth and redundancy
- Disables FSPF
Correct Answer: 3. Increases bandwidth and redundancy
Explanation:
A Cisco MDS port channel combines multiple physical Fibre Channel interfaces into one logical interface. This provides greater aggregate bandwidth, load balancing, and link redundancy. Traffic can be distributed across operational member links rather than depending on one physical connection. If one member link fails, traffic can continue through the remaining links without causing the entire logical port channel to fail. Cisco also recommends spreading member links across switching modules where possible so a module failure does not remove every physical path in the port channel.
Question 222. What is the default MDS port channel mode in current releases
- Active
- Passive
- Disabled
- Monitor
Correct Answer: 1. Active
Explanation:
Cisco changed the default MDS port channel mode to Active beginning with NX OS Release 8.4.1. Active mode uses port channel protocol negotiation between peer interfaces and supports automatic recovery when operational links return. It can also detect configuration mismatches that would be harder to identify when no negotiation protocol is exchanged. Cisco documentation contrasts Active mode with the older On mode and recommends Active behavior for supported port channel designs. The mode improves consistency checking and synchronized startup of member interfaces between the connected Fibre Channel switches.
Question 223. Which mode is required for an MDS F Port Channel
- On
- Static
- Passive
- Active
Correct Answer: 4. Active
Explanation:
Cisco supports F Port Channels only in Active mode. F Port Channels aggregate Fibre Channel interfaces used for endpoint facing connectivity while allowing multiple physical links to operate as one logical interface. Active mode provides protocol negotiation and helps both ends identify compatible interfaces before they become operational members. Cisco also requires Active operation for supported TF and NP port channel scenarios. This requirement differs from some traditional E Port Channel configurations where other modes have historically existed. Designers should verify the port type and supported mode before implementing Fibre Channel aggregation.
Question 224. How many physical links can an MDS port channel contain
- 4
- 16
- 32
- 64
Correct Answer: 2. 16
Explanation:
Cisco MDS port channels can contain up to sixteen physical Fibre Channel links. These member links operate together as one logical interface and can be distributed across supported switching modules for improved resilience. If one physical member fails, the port channel remains available as long as other operational members continue forwarding. The total available bandwidth decreases when a member fails, but the upper protocols continue to see the logical port channel rather than a complete path failure. This architecture provides both bandwidth aggregation and higher availability for SAN interswitch connectivity.
Question 225. Which value is added for exchange based MDS port channel load balancing
- Exchange ID
- VLAN ID
- Server UUID
- IP TTL
Correct Answer: 1. Exchange ID
Explanation:
Cisco MDS supports both flow based and exchange based port channel load balancing. Flow based load balancing uses the source ID and destination ID of Fibre Channel traffic. Exchange based load balancing adds the exchange identifier, commonly referred to as the OX ID, to the calculation. Including the exchange ID can distribute separate Fibre Channel exchanges between the same source and destination across different operational member links. This helps make better use of the aggregate bandwidth available in a multi link port channel while still maintaining correct ordering requirements for individual exchanges.
Question 226. What happens when one MDS port channel member fails
- FSPF is disabled
- Every member shuts down
- Traffic uses the remaining members
- The VSAN is deleted
Correct Answer: 3. Traffic uses the remaining members
Explanation:
When a physical member of an MDS port channel fails, traffic that previously used that interface can continue through the remaining operational members. The logical port channel remains available, although its total bandwidth is reduced. Cisco notes that the failure of one member does not normally affect the routing tables or the FSPF cost associated with the logical port channel. This makes port channels useful for resilient SAN design because a single cable, transceiver, or interface failure does not automatically cause the entire interswitch connection to disappear.
Question 227. What is the main scalability benefit of NPV
- Adds more VLANs
- Reduces Fibre Channel domain IDs
- Creates additional VSANs
- Increases GPU memory
Correct Answer: 2. Reduces Fibre Channel domain IDs
Explanation:
N Port Virtualization reduces the number of Fibre Channel domain IDs required in a core edge SAN design. An NPV switch does not join the Fibre Channel fabric as a normal full fabric switch. Instead, it appears as a host toward the upstream core while providing switch connectivity toward attached servers. Multiple NPV devices can therefore share the domain ID of the upstream core switch rather than consuming unique domain IDs individually. This improves scalability in environments containing many edge switches or blade chassis and reduces pressure on Fibre Channel fabric domain limits.
Question 228. What happens when NPV mode is enabled on an MDS switch
- Nothing changes until the next login
- Only the VSAN database is cleared
- The switch becomes an NPIV core
- The configuration is erased and the switch reboots
Correct Answer: 4. The configuration is erased and the switch reboots
Explanation:
Cisco states that enabling NPV mode causes the existing system configuration to be erased and the switch to reboot into NPV mode. This is a major operational change and should not be treated like enabling an ordinary feature on a production switch. Cisco recommends saving the existing configuration to bootflash or another supported location before enabling NPV if that configuration might be needed later. After the reboot, the device behaves as an NPV switch and uses NP links toward the upstream NPIV capable core rather than functioning as a normal fabric switch.
Question 229. What does NPIV assign to a single physical N Port
- Multiple VSANs only
- Multiple VLANs
- Multiple Fibre Channel IDs
- Multiple routing tables
Correct Answer: 3. Multiple Fibre Channel IDs
Explanation:
N Port Identifier Virtualization allows multiple Fibre Channel IDs to be assigned through one physical N Port. This enables several virtual machines, applications, or logical server interfaces sharing one physical Fibre Channel connection to maintain distinct fabric identities. Cisco notes that NPIV also enables zoning, access control, and port security to be applied at the individual application or virtual endpoint level. NPV relies on NPIV capability in the upstream core so multiple devices connected behind an NPV edge switch can log in through shared upstream connections while retaining unique Fibre Channel identities.
Question 230. From which MDS NX OS release is NPIV enabled by default
- 8.4.2
- 7.0.1
- 9.4.1
- 6.2.1
Correct Answer: 1. 8.4.2
Explanation:
Cisco documentation states that NPIV is enabled by default beginning with MDS NX OS Release 8.4.2. NPIV provides multiple Fibre Channel identifiers through a single physical N Port and is an important requirement for NPV based designs. Earlier software releases may require administrators to enable the NPIV feature explicitly. Designers should therefore verify the actual software release and feature state when integrating NPV edge switches or virtualized server environments with the Fibre Channel core. Correct NPIV operation is necessary for the upstream fabric to recognize multiple logical Fibre Channel endpoints sharing one physical connection.
Question 231. Which two main categories does Cisco Intersight use for pools
- SAN and LAN
- Static and dynamic
- Local and global
- Resource and Identity
Correct Answer: 4. Resource and Identity
Explanation:
Cisco Intersight classifies pools into Resource Pools and Identity Pools. Resource Pools group physical compute resources that can later be selected for profile assignment or operational use. Identity Pools provide unique identifiers used by servers and interfaces, including IP addresses, MAC addresses, UUID values, World Wide Names, and iSCSI Qualified Names. This pool based model supports stateless computing because a server profile can obtain identities from centralized pools rather than depending permanently on values embedded in one physical server. Pool utilization can also be monitored centrally through Intersight.
Question 232. What does an Intersight IP Pool provide
- Fibre Channel port names
- Dynamically assigned IP addresses
- Server UUIDs
- iSCSI names only
Correct Answer: 2. Dynamically assigned IP addresses
Explanation:
An Intersight IP Pool provides a managed collection of IP addresses that can be dynamically assigned to services running on supported network or compute elements. Centralized IP allocation reduces the need to enter management or service addresses manually for every server or infrastructure component. Intersight tracks which addresses are available, reserved, or used so administrators can monitor pool capacity and avoid duplicate assignments. IP Pools are one class of Identity Pool and work alongside other pool types such as MAC, UUID, WWN, and IQN pools in the UCS stateless management model.
Question 233. What does an Intersight MAC Pool assign
- Fibre Channel node names
- Server UUID values
- Network interface MAC addresses
- RAID identifiers
Correct Answer: 3. Network interface MAC addresses
Explanation:
An Intersight MAC Pool supplies unique Ethernet MAC addresses to network interfaces defined through supported server policies and profiles. Centralized allocation ensures that interfaces receive unique Layer 2 identities without requiring administrators to manually choose and track every address. The MAC identity can remain associated with the logical server profile instead of the physical adapter hardware, supporting stateless server replacement and profile mobility. Cisco classifies MAC Pools as Identity Pools along with IP, UUID, WWNN, WWPN, and IQN pools. This consistent allocation model helps prevent identity conflicts across large UCS environments.
Question 234. What does an Intersight UUID Pool provide
- Unique server identifiers
- VLAN numbers
- VSAN domain IDs
- Fabric routes
Correct Answer: 1. Unique server identifiers
Explanation:
An Intersight UUID Pool provides unique Universally Unique Identifier values to servers associated with server profiles. This allows the logical server identity to be centrally managed rather than relying only on the identifier originally tied to the physical hardware. When a profile is moved to compatible replacement hardware, its assigned logical identity can move with it. Cisco Intersight UUID Pools contain a configurable prefix and one or more ranges of suffix values. Pool allocation prevents duplicate UUID assignment among server profiles using the same managed identifier space.
Question 235. Which Intersight pool supplies identities to individual Fibre Channel vHBA ports
- WWNN Pool
- WWPN Pool
- UUID Pool
- IP Pool
Correct Answer: 2. WWPN Pool
Explanation:
A World Wide Port Name Pool contains Fibre Channel port identities used by vHBAs. Each vHBA requires a unique WWPN so the SAN fabric can recognize and zone the Fibre Channel port correctly. Cisco Intersight can allocate these values automatically through server profiles and SAN connectivity policies. WWPN Pools are distinct from WWNN Pools. A WWPN identifies an individual Fibre Channel port, while a WWNN identifies the Fibre Channel node associated with the server. Centrally managed WWPN allocation reduces manual configuration and supports portable logical server identities.
Question 236. What does an Intersight WWNN Pool identify
- One Ethernet interface
- One VXLAN tunnel
- One RAID group
- The Fibre Channel node
Correct Answer: 4. The Fibre Channel node
Explanation:
A World Wide Node Name Pool provides unique Fibre Channel node identities to servers. Cisco distinguishes the WWNN from individual WWPN values assigned to vHBA ports. A server can have one logical node identity while its separate Fibre Channel interfaces receive their own WWPNs. Intersight allocates these identities from centrally managed pools when they are referenced by server profiles and SAN connectivity policies. This supports stateless computing because the Fibre Channel identity can follow the logical profile rather than being permanently tied to a specific physical server adapter.
Question 237. What does an Intersight IQN Pool provide
- iSCSI initiator identifiers
- Ethernet VLAN numbers
- Fibre Channel domain IDs
- Server power priorities
Correct Answer: 1. iSCSI initiator identifiers
Explanation:
An IQN Pool contains iSCSI Qualified Names that can be assigned as initiator identifiers to iSCSI enabled vNICs. The IQN is the logical identity used by an iSCSI initiator when connecting to storage targets across an IP network. Cisco Intersight allows the pool to contain one or more blocks sharing an IQN prefix while using configurable suffixes and numerical ranges. Central allocation helps prevent duplicate iSCSI initiator identities and makes the identity portable with the server profile, supporting repeatable storage connectivity across compatible UCS hardware.
Question 238. What is the maximum size of one UUID block in the referenced Intersight pool configuration
- 100
- 500
- 1000
- 10000
Correct Answer: 3. 1000
Explanation:
Cisco Intersight documentation lists a UUID block size range from one through one thousand identifiers. A UUID Pool can contain multiple blocks, allowing administrators to create a larger logical pool while maintaining structured ranges. Each server profile using the pool receives a unique UUID allocation so duplicate server identities are avoided. Capacity planning for UUID Pools should account for the number of servers and profiles expected over the life of the deployment. Intersight also displays usage information so administrators can monitor which identifiers are available, reserved, or already assigned.
Question 239. What does an Intersight Firmware Policy define
- ACI contract filters
- Fibre Channel domain IDs
- VXLAN VNIs
- Target server firmware bundle versions
Correct Answer: 4. Target server firmware bundle versions
Explanation:
An Intersight Firmware Policy specifies the server firmware bundle version that should be applied to supported server models. The policy is attached to a server profile, allowing administrators to standardize firmware through the same profile driven management model used for other UCS settings. Cisco also supports excluding selected hardware components from firmware updates where the policy and platform permit it. Central firmware policies simplify lifecycle management because desired firmware versions can be associated with logical server configurations instead of requiring manual upgrades on every server independently.
Question 240. What is required after deploying a server profile with a new Firmware Policy
- Delete the server profile
- Reboot the server
- Remove the Fabric Interconnect
- Recreate the UUID Pool
Correct Answer: 2. Reboot the server
Explanation:
When a new Firmware Policy is attached to a server profile and the profile is deployed, Cisco Intersight downloads and prepares the firmware update. The server profile then shows that a reboot is pending. Rebooting the server triggers the activation workflow so the prepared firmware can be applied and monitored. After a successful firmware upgrade, the server profile returns to a normal operational state. Because the reboot is disruptive to running workloads, firmware policy deployment should be coordinated with application maintenance requirements and the availability design of the compute environment.