Refer to the exhibit. NTP is configured across the network infrastructure and Cisco DNA Center. An NTP issue was reported on the Cisco DNA Center at 17:15. Which action resolves the issue?
A.
Reset the NTP server to resolve any synchronization issues for all devices
B.
Check and resolve reachability between Cisco DNA Center and the NTP server
C.
Check and resolve reachability between the WLC and the NTP server
D.
Check and configure NTP on the WLC and synchronize with Cisco DNA Center
With NTP already configured and only one device exhibiting the issue, I would first check that device and make sure that it can reach the NTP server and sync time.
Cant be D
"NTP is configured across the network infrastructure "
Step 1 in the output is to check reachability, so that is what I will do.
This leaves B or C.
Seeing as this is one WLC being affected, I will check the reachability between WLC and NTP.
It seems to be a bug in DNA Center:
https://community.cisco.com/t5/cisco-digital-network-architecture-dna/dna-assurance-dna-center-and-network-device-time-has-drifted/td-p/4067331
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr46035
"Workaround: Remove the timezone configuration from the network device. "
If it is about the mentioned bug then none of the answers fit. :(
C
Not B, if DNA center cant reach NTP. It wont just be 1 WLC that has an issue.
Not D, You don't synchronize with the DNA Center to fix time issues. You sync it with the NTP server. It
If NTP is already enabled across the infrastructure and only the WLC is reporting issues then its probably just an issue with the NTP server syncing with the WLC
I did not see a sufficient explanation here, but I myself can not give it.
Without thinking too much, I would exclude the answer options regarding reachability on the network. The problem is only in the time lag and only with the WLC. Therefore D.
...the JOKERR link is not working.
The question state that NTP is already configured on the network infrastructure. Next you would want to verify reachability to the NTP server from DNAC and the WLC. Therefore either A or C could be correct, but I would say A is the answer.
Same for me, C seems to be the best option
A,B,D dosen't looks corect
A. Reset the NTP server to resolve any synchronization issues for all devices -- We have an issue only with 1 WLC
B. Check and resolve reachability between Cisco DNA Center and the NTP server We have an issue only with 1 WLC
D. Check and configure NTP on the WLC and synchronize with Cisco DNA Center --- NTP is ""configured"" across the ""network infrastructure"" and Cisco DNA Center.
D is correct.
Excessive time lag between Cisco DNA Center and device: The time difference between Cisco DNA Center and the device IP Address has drifted too far apart. CiscoDNA Center cannot process the device data accurately if the time difference is more than 3 minutes.
Reference: https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center-assurance/1-2- 10/b_cisco_dna_assurance_1_2_10_ug/b_cisco_dna_assurance_1_2_10_ug_chapter_01101.html
Well the question stated that NTP is already configured across the network infrastructure as well as DNAC so I think that eliminates D.
upvoted 2 times
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