How to configure NTPv4 on the WLC
In this post I will show how to configure NTPv4 on the Wireless LAN Controllers. As I mentioned in the last post “NTPv4 causes the WLC to fail to synchronize time“, “NTPv4 protocol is not supported in Cisco 2504 and 5508 Wireless Controllers”. So you need a WLC such as 3504/5520/8540 to do the following.
1. Configuring the switch
I have introduced the NTP Server configuration of the switch in “How to configure NTP Server with Cisco switch” before, In this post I have added some authentication configurations.
WS-C3650#sh run | sec ntp ntp authentication-key 1 md5 01100F175804 7 ntp authenticate ntp trusted-key 1 ntp source GigabitEthernet2/0/2 ntp master WS-C3650#
2. Configuring the WLC
(WLC) >config time ntp version 4 Server and key configs will be lost. Are you sure you want to change version? (y/n) y (WLC) >config time ntp server 1 10.106.32.22 (WLC) >config time ntp key-auth ? add Choose add to Enter a NTP authentication key. delete Choose del to delete the NTP authentication key. (WLC) >config time ntp key-auth add 1 md5 ascii ? <key> Enter MD5 key, Maximum of 16 characters. (WLC) >config time ntp key-auth add 1 md5 ascii cisco (WLC) > (WLC) >config time ntp auth enable Incorrect Usage! USE config time ntp auth enable <server-index> <key-index> (WLC) >config time ntp auth enable 1 1 Authentication Enabled (WLC) >
3. Verification
(WLC) >show time Time............................................. Sat Oct 19 08:24:24 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 ----------------------------------------------------------- 1 1 10.106.32.22 MD5 10 6 NTPQ status list of NTP associations assoc ind assid status conf reach auth condition last_event cnt src_addr =============================================================================== 1 12982 f63a yes yes ok sys.peer sys_peer 3 10.106.32.22 --More-- or (q)uit (WLC) > (WLC) >
4. References
NTP on Wireless LAN Controllers Configuration Example
Guidelines and Restrictions on NTP
NTP version evolution
Recent Comments