2018 Jan Cisco Official New Released 642-997
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Implementing Cisco Data Center Unified Fabric

Question No: 51 – (Topic 5)

What mode is required on a Cisco Nexus 7000 32-port 10-GB module port group to allow equal access to the 10-GB port controller?

  1. dedicated

  2. assigned

  3. shared

  4. community

Answer: C Explanation:

You can share 10 Gb of bandwidth among a group of ports (four ports) on a 32-port 10- Gigabit Ethernet module. To share the bandwidth, you must bring the dedicated port administratively down, specify the ports that are to share the bandwidth, change the rate mode to shared, and then bring the ports administratively up.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx- os/interfaces/configuration/guide/if_cli/if_basic.html#70242

Question No: 52 – (Topic 5)

What is an Overlay Transport Virtualization extended VLAN?

  1. the VLAN used to locate other AEDs

  2. the VLAN used to access the overlay network by the join interface

  3. the user VLAN that exists in multiple sites

  4. the VLAN that must contain the overlay interface

Answer: C Explanation: Functions of OTV

->Maintains a list of overlays

->Maintains a list of configured overlay parameters such as name, multicast address, encapsulation type, authentication, and OTV feature sets

->Maintains the state of the overlay interface

->Maintains the status of OTV VLAN membership from Ethernet infrastructure and the state of the authoritative edge device (AED) from IS-IS

->Maintains a database of overlay adjacencies as reported by IS-IS

->Maintains IP tunnel information and manages the encapsulation for data sent on the overlay network

->Manages delivery groups (DGs) for each overlay by snooping multicast traffic and monitoring traffic streams for active DGs

->Configures, starts, and stops the OTV IS-IS instance

->Interfaces with IP multicast to join provider multicast groups for each overlay

Question No: 53 – (Topic 5)

Which policy-map action performs congestion avoidance?

  1. priority

  2. bandwidth

  3. queue-limit

  4. random-detect

Answer: D Explanation:

Congestion avoidance techniques monitor network traffic loads in an effort to anticipate and avoid congestion at common network bottlenecks. Congestion avoidance is achieved through packet dropping. Among the more commonly used congestion avoidance mechanisms is Random Early Detection (RED), which is optimum for high-speed transit networks. Cisco IOS QoS includes an implementation of RED that, when configured, controls when the router drops packets. If you do not configure Weighted Random Early Detection (WRED), the router uses the cruder default packet drop mechanism called tail


Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/qos/configuration/guide/fqos_c/qcfconav.ht ml

Topic 6, Implementing Network Virtualization in Cisco Data Center Environment

Question No: 54 – (Topic 6)

Which feature enables NIV?

  1. EHV

  2. vPC

  3. Cisco FabricPath

  4. Cisco OTV

  5. VN-Tag

Answer: A Explanation:

EHV is the feature that enables NIV.

Question No: 55 – (Topic 6)

Which three selections represent implementations of Cisco VN-Link technology? (Choose three.)

  1. Cisco Nexus 1000V

  2. Cisco Nexus 2000 FEX

  3. Cisco VM-FEX

  4. VMware PTS

  5. vMotion

Answer: A,C,D


The VM is powered on and resides on the ESX Host 1 with all the information stored on the shared storage.

The VM was connected to the PODy (where y is the number of your POD) PTS VDS by associating it to port group VLAN61 that was created on the Cisco Nexus 5548 device. The VM has been connected to the vPC system automatically using a VN-Link in the hardware in PTS mode or in VM-FEX mode.

The VEM bits are used in PTS mode to connect the VM VNIC to the VMNIC interface.

In this case, the VMNIC interface is not a real VMNIC but a dynamic VNIC that is presented as an interface to the ESX OS. The dynamic VNIC is enabled when the Cisco UCS VIC creates and configures the VNIC parameters inherited from port group VLAN61.

Reference: http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513


Question No: 56 – (Topic 6)

When connecting Cisco Nexus 5000 Series Switches to the VMware vCenter Server, which item must be configured before installing the extension keys?

  1. configure vPC

  2. configure DirectPath I/O support in vCenter

  3. configure PTS on the VSM

  4. configure dynamic vNICs

Answer: A

Question No: 57 – (Topic 6)

Which two Cisco Nexus platforms support Adapter FEX? (Choose two.)

  1. Cisco Nexus 7000 Series Switches

  2. Cisco Nexus 5000 Series Switches

  3. Cisco Nexus 5500 Series Switches

  4. Cisco Nexus 4000 Series Switches

  5. Cisco Nexus 2000 Series Fabric Extenders

Answer: C,E Explanation:

At the access layer, the Adapter-FEX requires a FEX-enabled adapter on a server that connects to a parent device that supports virtualization of interfaces. The Adapter-FEX is supported on the following platforms:

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The Cisco Unified Computing System (UCS) platform supports Adapter-FEX between UCS servers and the UCS Fabric Interconnect.


The Adapter-FEX is supported on the Cisco Nexus 5500 Series platform and on the Cisco Nexus 2200 Fabric Extender that is connected to a Cisco Nexus 5500 Series parent device. This implementation works on a variety of FEX-capable adapters, including the Cisco UCS P81E virtual interface card (VIC) adapter for the UCS C-Series platform and third party adapters such as the Broadcom BCM57712 Convergence Network Interface Card, that implement the virtual network tag (VNTag) technology.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/operations/adapt er_fex/513_n1_1/ops_adapter_fex/ops_using_adapter_fex.html

Question No: 58 – (Topic 6)

Which command sequence correctly enables Adapter FEX on Nexus 5000 Series Switches?

  1. switch(config)# install feature-set virtualization switch(config)# feature-set virtualization

  2. switch(config)# install feature-set adapter-fex switch(config)# feature-set adapter-fex

  3. switch(config)# install feature-set adapter-fex switch(config)# feature-set virtualization

  4. switch(config)# install feature-set virtualization switch(config)# feature-set adapter-fex

Answer: A Explanation:

install feature-set virtualization : installs the cisco virtual machine feature set on the switch. feature-set virtualization : enables the cisco virtual machine feature on the switch.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/adapter- fex/513_n1_1/b_Configuring_Cisco_Nexus_5000_Series_Adapter- FEX_rel_5_1_3_N1/b_Configuring_Cisco_Nexus_5000_Series_Adapter- FEX_rel_5_1_3_N1_chapter_010.pdf

Question No: 59 – (Topic 6)

Which three Cisco UCS C-Series CNAs support Adapter FEX? (Choose three.)

  1. Qlogic QLE8152

  2. Broadcom BCM57712

  3. Cisco UCS P81E

  4. Cisco UCS VIC 1220

  5. Emulex OCe10102-FX-C

  6. Intel X520

Answer: B,C,D

Reference: http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c- series_integration/ucsm2-1/b_UCSM2-1_C-Integration/b_UCSM2-1_C- Integration_chapter_011.html#reference_D644111FC68046F0BEA49756A0834664

Question No: 60 – (Topic 6)

Which two items are required components of VN-Link in software? (Choose two.)

  1. VDC

  2. VEM

  3. vPC

  4. VSM

  5. VRRP

Answer: B,D Explanation:

The Cisco Nexus 1000V Series consists of two main types of components that can virtually emulate a 66-slot modular Ethernet switch with redundant supervisor functions:

  • Virtual Ethernet module (VEM)-data plane: This lightweight software component runs inside the hypervisor. It enables advanced networking and security features, performs switching between directly attached virtual machines, provides uplink capabilities to the rest of the network, and effectively replaces the vSwitch. Each hypervisor is embedded with one VEM.

  • Virtual supervisor module (VSM)-control plane: This standalone, external, physical or virtual appliance is responsible for the configuration, management, monitoring, and diagnostics of the overall Cisco Nexus 1000V Series system (that is, the combination of the VSM itself and all the VEMs it controls) as well as the integration with VMware vCenter. A single VSM can manage up to 64 VEMs. VSMs can be deployed in an active-standby model, helping ensure high availability.

  • Reference: http://www.cisco.com/c/en/us/solutions/collateral/switches/nexus-1000v-switch- vmware-vsphere/white_paper_c11-525307.html

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