NTPv4 causes the WLC to fail to synchronize time
The following error message may appear on the Cisco 2504 and 5508 Wireless Controllers. And the WLC can’t synchronize with the NTP Server.
(5508-1) >*sntpMainTask: Oct 19 11:16:34.431: None of NTP V4 servers are enabled. Not running server self check
(5508-1) >
(5508-1) >show time /usr/bin/ntpq: error while loading shared libraries: libmd5.so.0: cannot open shared object file: No such file or directory
Time............................................. Sat Oct 19 11:16:41 2019
Timezone delta................................... 0:0
Timezone location................................
NTP Servers
NTP Version.................................. 4
Index NTP Key NTP Server NTP Key Polling Intervals
Index Type Max Min
-----------------------------------------------------------
NTPQ status list of NTP associationsIn fact, this is because the 2504 and 5508 do not support NTPv4.
NTPv4 protocol is not supported in Cisco 2504 and 5508 Wireless Controllers.
https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/network_time_protocol_setup.html#guidelines-restrictions-ntp
After changing NTP Version to 3, NTP can be successfully synchronized.
(5508-1) >config time ntp version 3
Server and key configs will be lost. Are you sure you want to change version? (y/n) y
(5508-1) >
(5508-1) >config time ntp server 1 10.106.60.214
(5508-1) >
(5508-1) >show time
Time............................................. Sat Oct 19 11:17:50 2019
Timezone delta................................... 0:0
Timezone location................................
NTP Servers
NTP Version.................................. 3
NTP Polling Interval......................... 600
Index NTP Key Index NTP Server Status NTP Msg Auth Status
------- ---------------------------------------------------------------------
1 0 10.106.60.214 In Sync AUTH DISABLED
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