Exam 350-801 topic 1 question 333 discussion

Actual exam question from Cisco's 350-801

Question #: 333
Topic #: 1

Refer to the exhibit. An engineer is troubleshooting an NTP synchronization issue that returns a message of ‘unsynchronized’ when the utils ntp status command is run on the Cisco UCM subscriber node. The connectivity between the subscriber and the NTP server was verified as working, and the NTP server is running. Which action resolves the issue?

A. Add an additional NTP server on the Cisco UCM subscriber node.
B. Add an additional NTP server to the Cisco UCM publisher node.
C. Ensure that the Cisco UCM subscriber node is running.
D. Ensure that the Cisco UCM publisher node is up and running.

Show Suggested Answer

Suggested Answer: D 🗳️

by auswar3ft at Jan. 24, 2023, 1:43 p.m.

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G0y0

4 months, 2 weeks ago

Selected Answer: D

If the subscriber has network connectivity and is reaching the NTP, and the NTP is working and running, then the last thing that is needed to review is the publisher. At least Publisher and subscriber must be reachable each other, whether they use prefix /30 or /29, so in these conditions, if subscriber reach the NTP, the publisher must do it too. So it is needed to check what happen with publisher.

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G0y0

4 months, 2 weeks ago

To clarify, subscriber get his clock from the publisher, this is by design. It is FALSE that an additional NTP server can be added to the subscriber.

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b3532e4

10 months, 3 weeks ago

Definitely D

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MaxG

2 years, 1 month ago

Selected Answer: D

Definitely D. CUCM publisher needs an NTP source that is not a member of the CUCM cluster; therefore the CUCM publisher synchronizes its time with the NTP server. In this exchange, the CUCM publisher is an NTP client. The CUCM subscribers synchronize their time with the CUCM publisher. In this exchange, the CUCM publisher is an NTP server where the CUCM subscribers are NTP clients. https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/215537-network-time-protocol-ntp-on-cucm.html .INIT. means that initialization has not yet succeeded. Probable causes of NTP issues in CUCM: - External NTP server is not reachable. - NTP stratum is higher than the acceptable limit. - Publisher is down, so the Subscriber NTP is unsynchronized. https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/118718-technote-cucm-00.html

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Panda_man

2 years, 5 months ago

Selected Answer: D

D is correct

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auswar3ft

2 years, 5 months ago

Selected Answer: D

I think the issue is with the PUB. adding an additional NTP server wouldn't affect the current setup since the node must be added to both and it is reachable by the SUB.

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auswar3ft

2 years, 5 months ago

correction I think it is A. the subscriber can receive NTP info from the NTP server directly. instead of depending on the PUB.

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G0y0

4 months, 2 weeks ago

As far as I know, it is not possible. If you share the reference that support what you are claiming, it would be very grateful.

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