300-615 DCIT Troubleshooting Cisco Data Center Infrastructure
Update：2026年5月12日
Questions and Answers: 167 Q&A
1.
The connection between a Cisco Nexus 5548UP switch and a Cisco MDS switch fails to initialize. What is the cause of the issue?
2.
A switch is being downgraded to an earlier release because of a problem with the current release. After the switch is downgraded, it can no longer forward traffic. Which action resolves the issue?
3.
A recent configuration change removes the HSRP adjacency between the SW-1 and SW-2 Cisco Nexus switches. The change causes the servers on this subnet to lose Internet access. Which action restores the connectivity of all servers on VLAN 13?
4.
The script fails to convert a JSON variable into a Python dictionary. Which action resolves the issue?
5.
When an engineer inserts 8-Gb FC SFP port 15 on a Cisco UCS Fabric Interconnect, the port fails. What is a possible cause of the issue?
6.
An engineer is troubleshooting a fabric discovery failure. Which two requirements must an engineer verify about switch connectivity to solve the problem? (Choose two.)
7.
Drag and drop the commands from the left onto the correct categories on the right.
8.
One of the vPC VTEPs fails to route VXLAN traffic to vPC connected hosts. When the issue was being diagnosed, it was discovered that the packets that were expected to be forwarded to the MAC address on the SWITCH-VTEP-1 are instead forwarded to the MAC address on SWITCH-VTEP-2 and then dropped. Which action resolves the issue?
9.
A network engineer notices a sudden interruption to the HSRP adjacency between the switches. The packet loss is reported on the servers for which the default gateway is set as the virtual IP of the HSRP. AII servers on the VL AN can exchange ping messages. Which configuration set must be applied on the HSRP peers to resolve the adjacency issue?
10.
The job fails to run. Which action resolves the issue?
11.
The vPC between switch1 and switch2 does not work. Which two actions resolve the problem? (Choose two.)
12.
A network engineer must connect a Cisco UCS Fabric Interconnect cluster to the Cisco ACI. VMware ESXi hypervisors have been installed on Cisco UCS blades and a VMware VMM domain has been configured. However, virtual machines fail to reach their default gateway in the Cisco ACI Fabric. The engineer investigates the issue and notices that the VMware Distributed Switch (VDS) teaming policy is set to "Route based on IP hash". Which action resolves the issue?
13.
The OTV overlay is deployed in multicast mode. After an unexpected reload of N7K-SITE1-OTV1, the network administrator observed that on N7K-SITE1-OTV2 the OTV site adjacency went into the partial state. Which action resolves the issue?
14.
A fabric interconnect fails to start and the console displays the loader prompt. Which two actions resolve the issue? (Choose two.)
15.
UCS- 1 fails to connect to the storage array. Which action resolves the issue?
16.
A network engineer configures an authentication domain through an LDAP provider on the Cisco UCS Manager for users from different companies to log into their respective organizations created in the UCS Manager. The engineer tests the configuration and notices that any user has login access to any organization in the UCS Manager. Which action should be taken to resolve the issue?
17.
An Engineer cannot log in to the Cisco IMC page of the Cisco UCS C220 server. Which action resolve the issue?
18.
To avoid service disruption, an engineer must move the_ server from LEAF_ 1 to LEAF_ _2. After running the test, the engineer noticed that L EAF_ 2 failed to forward network traffic into the VXL AN fabric. The BGP, interface NVE, and VNI were confirmed to be configured as expected. Which two actions must be taken on L EAF_ 2 to resolve the issue? (Choose two.)
19.
A functioning trunk port Ethernet1/48 exists between two identical Cisco Nexus 5000 Series Switches. The interfaces on the switches support the MACsec feature and are configured identically. To enable manual MACsec, an engineer adds the configuration shown in the exhibit to both sides of the trunk. The trunk port stops functioning. Which action should be taken to resolve the issue?
N5K-1#show running-config aaa all
!
version 7.0(2)N2(1)
logging level aaa 5
aaa authentication login default group radius
aaa authentication login console group radius
aaa authorization ssh-publickey default local
aaa authorization ssh-certificate default local
aaa accounting default localaaa user default-role
aaa authentication login default fallback error local
aaa authentication login console fallback error local
aaa authentication login error-enableno
aaa authentication login mschap enableno
aaa authentication login mscapv2 enableno
aaa authentication login chap enable
20.
An engineer monitors a Cisco UCS server logs and discovers a blade discovery issue. Which procedure resolves the issue?
21.
An engineer must configure Linux hosts that are deployed on Cisco UCS B-Series Servers to boot from SAN. The SAN boot policy is configured in Cisco UCS Manager, and the boot order is verified to be set as expected However, the Linux hosts fail to boot. Which action resolves the issue?
22.
A network administrator attempts to install an application in the Cisco NX-OS Guest shell and receives an error that there is not enough space on the disk. Which command must the administrator run to increase the disk space available in the Guest shell?
23.
An engineer discovers that if the vPC peer link goes down, half of the devices in VLAN 20 experience connectivity issues with the external networks Which action resolves the issue?
24.
The external routes fail to propagate to leaf switches in Cisco ACI fabric Which two actions resolve the issue? (Choose two.)
25.
An engineer must connect N2K-Fex-1 and N5K-Core-1 so that the traffic flow between the two devices uses load balancing. After inspecting the statistics of the interconnecting interfaces, the engineer concludes that only one link is used. Which action resolves the problem?
26.
A Fibre Channel interface on a Cisco Nexus 5000 Series Switch receives bit errors, and the switch disables the interface. A temporary workaround must be implemented before the root cause is identified. Which action does an engineer take to prevent this issue from reoccurring?
27.
The scheduler was configured to save the running-config automatically daily. However, the scheduler is returning the error presented. Which action resolves the issue?
28.
The HSRP configuration in the exhibit fails to function. Which action resolves this issue?
29.
A network engineer is implementing the Cisco ACI Fabric and notices that the Leaf-1 switch is registered, has an assigned name, but is displayed as inactive in the APIC. After further investigation, it became clear that the leaf switch was recently moved from another Cisco ACI environment. Which action resolves the problem?
30.
An OSPF adjacency between Router-A and Router-B cannot reach the FULL state. Which action resolves the issue?
31.
After an unexpected reload of the Cisco Nexus 9000 Series Switch, the network administrator noticed that one of the Software Maintenance Upgrades (SMU) images is inactive. The engineer must ensure that the package remains active after the switch is reloaded in the future. Which action accomplishes this goal?
32.
HSRP adjacency fails to form between Nexus7K-1 and Nexus7K-2. Which action should be taken to solve the problem?
33.
An engineer troubleshoots the HSRP configuration and notes that the remote end uses HSRP version 1. The engineer sets the local HSRP to version 1, but the problem continues. Which action resolves the issue?
34.
The EEM script is applied in the default VDC to collect the outputs during high CPU utilization on the Cisco Nexus 7000 Series Switch for all VDCs. Which configuration set must be added to the script to fix the issue?
35.
An FSM failed during an uparade with the auto-install feature enabled. The engineer must remove the service pack from the subordinate fabric interconnect (FI) to recover the Fls. Which set of commands resolves the issue?
36.
A network engineer is troubleshooting a Cisco Nexus 5000 Series Switch. The interface between the server and the switch is nonoperational and is expected to operate at 10 Gbps. The drain rate of the interface is 3 Mbps. Which action resolves the issue?
37.
The scheduler job fails to run. Which action resolves the issue?
38.
An engineer must upgrade all components in a Cisco UCS domain to the same package version, but the upgrade process fails to complete. Which set of Auto Install actions resolves the problem?
39.
An engineer is performing a health check on ACI. Which statement about interface Ethernet 1/11 is true?
40.
An engineer attempts to register Cisco UCS Manager to Cisco UCS Central, but the registration fails. The engineer can ping Cisco UCS Central from UCS Manager. Which two actions must the engineer attempt to resolve the problem? (Choose two.)
41.
A Cisco UCSB-Series Blade Server is configured to boot a VMwareESXi host from an EMC VNX storage array by using a Fibre Channel SAN. The boot order is confirmed to be configured as expected but the server fails to boot from the SAN. Which action reserves the problem?
42.
After the configuration is performed, guestshell continues to use 2%CPU. Which action resolves the issue?
switch#guestshell resize cpu 4
Note:System CPU share wil1 be resized on Guest shell enable
43.
An IOM fails during a firmware upgrade and is unresponsive. Which action recovers the module?
44.
A request to activate the port security database is rejected. Which action do you perform to investigate the cause of the issue?
45.
A network engineer configures OSPF protocol between two Cisco Nexus 7000 Series Switches. The OSPF neighbors fail to synchronize OSPF databases. Which action resolves the issue?
46.
An engineer is troubleshooting the connectivity between Server-1 and Server-2. Which action resolves the connectivity issue?
47.
A blade that is connected to FI-B fails to boot from a SAN LUN. The boot policy is configured to boot by using vHBA1 as the SAN Primary. Which set of actions resolves the issue?
48.
Your client reports that many flaps and server cluster disconnects occur in their data center. While troubleshooting the issue, you discover a network attack hitting their Cisco Nexus 7000 Series Switches and determine that the source IP addresses are spoofed. Which first-line security solution resolves this issue?
49.
A network engineer finds an error that says, "BIOS failed power-on self-test." When the engineer checks the console, they discover that the Cisco UCS Blade firmware upgrade process stopped at the "Configuring and testing memory" stage. Which set of actions resolves the issue?
50.
A network engineer traces the packet flow from the Veth991 of a blade server toward the core switch. The switch reports performance issues. What is the role of the interface Eth1/7?
51.
A network engineer finds one of the fabric interconnects offline when connecting L1 and L2 ports on both fabric interconnects. Which action resolves the issue?
52.
An engineer is implementing a storage VDC, but fails. Which two prerequisites must be in place before a storage VDC is implemented? (Choose two.)
53.
An engineer upgrades Cisco UCS firmware from release 3. 1(2) to release 3. 1(3) using Autolnstall. Both fabric interconnects go ofline during the software upgrade installation and issue multiple F SM retries in the DeployPollActivate stage. Which set of actions resolves the issue?
54.
Drag and drop the actions from the left onto the faults that they resolve on the right. Not all options are used.
55.
An upgrade operation fails with an error displayed. Which action resolve the issue?
56.
A Postman call to a Cisco APIC fails. The access credentials were confirmed to be configured as expected. Which action resolves the issue?
57.
A Cisco Nexus 9000 Series Switch crashes and fails to boot. An engineer must recover the switch and investigate the issue. The switch uses 172.20.50.213/24 IP address for management and its default gateway is 172.20.50.254. Drag and drop the steps for recovering the Cisco Nexus 9000 Series Switch from the left onto the right. Not all steps are used
58.
An engineer troubleshoots an OSPF neighborship problem between Router R2 and Router R10. Which action resolves the problem?
59.
A network administrator must delete a feature group from a Cisco Nexus 5000 Series Switch. Which action resolves the issue?
60.
The FCoE traffic fails to traverse the vfc2 interface. The VSAN 102 is configured for vfc2. Which action resolves the issue?
61.
Sw1 and Sw2 are two Cisco Nexus 9000 Series Switches that run Cisco NX-OS. They are VTEPs in the same vPC domain. Which statement describes what happens in this scenario?
