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Cisco Bug: CSCum04469 - N7K not sync to ntp servers (w/prefer and w/o prefer)

Last Modified

Feb 14, 2018

Products (5)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.1(4a) 6.1(5.60) 7.0(1)ZD

Description (partial)

Symptom:
N7K does not sync to different stratum ntp servers.

N7KA-VDC7# sh ntp peer-status ; sh clock
Total peers : 2
* - selected for sync, + -  peer mode(active),
- - peer mode(passive), = - polled in client mode
    remote               local                 st   poll   reach delay   vrf
-------------------------------------------------------------------------------
=172.16.2.5             0.0.0.0                 3   64     377   0.00154 st-ex  <==== Not synced
=172.16.2.6             0.0.0.0                 2   64     377   0.00047 st-ex  <==== Not synced
04:45:21.631 JST Thu Dec 12 2013

Conditions:
- NTP server's  are not synced each other (probably having different times)
- N7K indicates one server with "prefer" option and the other server without "prefer"

Related Community Discussions

Nexus 7000 シリーズが NTP Server に同期しない
2019年1月24日 (初版) xxxx年x月x日 (アップデート) TAC SR Collection 主な問題 二つ以上の NTP Server が設定され、また、その Server 間で時刻が同期していない場合に、 Nexus 7000 シリーズが Server に同期しない事象が発生します。 原因 この問題は <key>CSCum04469</key> として報告されています。 解決策 不具合の暫定回避策: - prefer の設定を外す - NTP Server を一つに減らす - N7K で設定した NTP サーバー間で互いを peer として設定する 備考 本不具合は、Bug Search Tool でも確認できます。
Latest activity: Jan 25, 2019
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