Cisco 642-980 ExamDCUFT Troubleshooting Cisco Data Center Unified Fabric

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Q1. On the secondary vPC switch, under which circumstance does the vPC autorecovery feature not bring up the vPC member ports? 

A. Peer link fails, and subsequently, the peer-keepalive link fails. 

B. Peer link is up, and the peer-keepalive link fails. 

C. Both vPC peers are reloaded, and the primary does not come back up. 

D. Peer link fails, and subsequently, the primary switch fails. 


Q2. Which tools can assist in the troubleshooting of FC-0 issues? (Choose three.) 

A. FC analyzer 


C. Device Manager 

D. show interface fc1/1 optical-power-budget 


F. a portable protocol analyzer 

Answer: ACF 

Q3. Which statement is true regarding the admin VDC? 

A. All licensed features and feature sets must be enabled from the admin VDC. 

B. Fabric extenders connectedto the admin VDC must be statically pinned. 

C. Only the mgmt 0 interface is allocated to the admin VDC. 

D. All interfaces other than mgmt 0 are allocated to the default VDC. 

E. The admin context can only be created on Supervisor 2/2E. 

F. The admin VDC is a new feature in Cisco NX-OS version 6.0. 


Q4. Cisco UCS users residing behind N5K2 are complaining about poor performance with a single LAN application in the data center. Which statement best explains what is wrong with N5K2? 

A. Traffic balancing is based on the destination IP address. 

B. Port channel members do not have equal bandwidths. 

C. The trunk between the Nexus 5000 switches is filtering all VLANs. 

D. E2/1 on N7010-C2 is not configured as a trunk for application traffic from N5K2. 



Traffic balancing is based on the destination IP address

Use the “show port-channel load-balance” command to verify.

Q5. Which two commands will show all the OTV edge devices and their MAC addresses in all sites in the overlay? (Choose two.) 

A. show otv adjacency overlay 

B. show otv site 

C. show otv vlan 

D. show otv adjacency 

E. show mac address-table 

Answer: AD 

Q6. It has been determined that unknown unicast, multicast, and broadcasttraffic is not correctly being switched through either Nexus 7010 switch. Whichstatement best describes the cause of this issue? 

A. No VLANs are allowed across the vPC peer link. 

B. The MST STP is not enabled on either switch. 

C. The default VLAN is inactive. 

D. VTP is not configured to handle this type of traffic. 



The MST STP is not enabled on either switch From both switches the “show spanning-tree mst” command show that the switch is not in MST mode.

Q7. You receive an error attempting to enable the vPC feature on a Cisco Nexus 7018 Switch. Which Cisco Fabric Services distribution must be operational before the feature can be enabled? 







Q8. Which command would you use to find the AED of an extended VLAN in a dual-homed site of an OTV network? 

A. show otv aed on the AED 

B. show otv site on any edge devices in the site 

C. show otv vlan on the AED 

D. show otv aed on any edge devices in the site 

E. show otv vlan on any edge devices in the site 


Q9. Which CLI command can tell which switch is on the other side of port channel 2 that is trunking VSAN 5? 

A. show topology vsan 5 

B. show interface port-channel 2 trunk vsan 5 

C. show interface port-channel 2 vsan 5 peer-info 

D. show fcs vsan 5 

E. show fspf database vsan 5 interface port-channel 2 


Q10. A customer reports that it cannot establish a vPC peer link between two Cisco Nexus 5548UP Switches. The interfaces on both switches are configured and cabled correctly. The interface status is up/down on switch 1 and up/up on switch 2. Which three steps are taken to isolate the root cause? (Choose three.) 

A. ask the customer if the link was ever functional 

B. determine whether the fiber-optic cable type (single mode or multimode) matches the X2 modules 

C. swap the fiber-optic cable with one known to be good 

D. swap the transceivers between the two interfaces 

E. swap the ends of the fiber-optic cable 

Answer: CDE 

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