Cisco Nexus 5600 Series - Configuration Examples for NTP

Configuration Examples for NTP
Configuration Examples for NTP
This example shows how to configure an NTP server and peer, enable NTP authentication, enable NTP
logging, and then save the startup configuration so that it is saved across reboots and restarts:
switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
switch(config)# ntp server 192.0.2.105 key 42
switch(config)# ntp peer 192.0.2.105
switch(config)# show ntp peers
--------------------------------------------------
Peer IP Address Serv/Peer
--------------------------------------------------
192.0.2.100 Peer (configured)
192.0.2.105 Server (configured)
switch(config)# ntp authentication-key 42 md5 aNiceKey
switch(config)# show ntp authentication-keys
-----------------------------
Auth key MD5 String
-----------------------------
42 aNicekey
switch(config)# ntp trusted-key 42
switch(config)# show ntp trusted-keys
Trusted Keys:
42
switch(config)# ntp authenticate
switch(config)# show ntp authentication-status
Authentication enabled.
switch(config)# ntp logging
switch(config)# show ntp logging
NTP logging enabled.
switch(config)# copy running-config startup-config
[########################################] 100%
switch(config)#
This example shows an NTP access group configuration with the following restrictions:
• Peer restrictions are applied to IP addresses that pass the criteria of the access list named “peer-acl.”
• Serve restrictions are applied to IP addresses that pass the criteria of the access list named “serve-acl.”
•
Serve-only restrictions are applied to IP addresses that pass the criteria of the access list named
“serve-only-acl.”
•
Query-only restrictions are applied to IP addresses that pass the criteria of the access list named
“query-only-acl.”
switch# configure terminal
switch(config)# ntp peer 10.1.1.1
switch(config)# ntp peer 10.2.2.2
switch(config)# ntp peer 10.3.3.3
switch(config)# ntp peer 10.4.4.4
switch(config)# ntp peer 10.5.5.5
switch(config)# ntp peer 10.6.6.6
switch(config)# ntp peer 10.7.7.7
switch(config)# ntp peer 10.8.8.8
switch(config)# ntp access-group peer peer-acl
switch(config)# ntp access-group serve serve-acl
switch(config)# ntp access-group serve-only serve-only-acl
switch(config)# ntp access-group query-only query-only-acl
switch(config)# ip access-list peer-acl
switch(config-acl)# 10 permit ip host 10.1.1.1 any
switch(config-acl)# 20 permit ip host 10.8.8.8 any
Cisco Nexus 5600 Series NX-OS System Management Configuration Guide, Release 7.x
232 OL-31641-01
Configuring NTP
Configuration Examples for NTP