NTP Configuration


Hello !

In this post I’d like to show you that NTP configuration between 2 cisco routers (top post) and then between 1 cisco router and cisco ASA(bottom post)

NTP ConfigurationR1

R1# show clock detail
*00:01:19.099 UTC Fri Mar 1 2002 No time source

R1# configure terminal
R1(config)#ntp server nist.netservicesgroup.com
Translating “nist.netservicesgroup.com”…domain server (192.168.1.12) [OK]

R1# show clock detail 03:15:52.593 UTC Sun Jan 2 2013 Time source is NTP

R1# show ntp associations
address ref clock st when poll reach delay offset disp
*~64.113.32.5.ACTS. 1 45 64 17 36.2 -2.90 1901.2
* master (synced), # master (unsynced), + selected, – candidate, ~ configured

R2

R2# show clock detail *02:16:24.771 UTC Fri Mar 1 2002 No time source

R2(config)#  ntp server 192.168.1.1

R2# show clock detail
04:17:06.271 UTC Sun Nov 23 2008 Time source is NTP

R2# show ntp associations
address ref clock st when poll reach delay offset disp
*~192.168.1.1 64.113.32.5 17 64 377 35.9 2.41 7.8
* master (synced), # master (unsynced), + selected, – candidate  ~ configured

AUTHENTICATION

R1(config)# ntp authenticate
R1(config)# ntp authentication-key 1 md5 cisco
R1(config)# ntp trusted-key 1

R2(config)# ntp authenticate
R2(config)# ntp authentication-key 1 md5 cisco
R2(config)# ntp trusted-key 1
R2(config)# ntp server 192.168.1.1 key 1

 

 

 

 

 

Ntp_asa

ASA1

interface GigabitEthernet2
nameif DMZ
security-level 50
ip address 192.1.24.100 255.255.255.0

ntp server 192.1.24.4 source DMZ1
ntp authenticate
ntp authentication-key 1 md5 cisco
ntp trusted-key 1

ASA1# sh ntp associations
address         ref clock     st  when  poll reach  delay  offset    disp
*~192.1.24.4       127.127.7.1       2    72   128  377    22.0  -81.47   123.2
* master (synced), # master (unsynced), + selected, – candidate, ~ configured

R4

interface FastEthernet0/0
ip address 192.1.24.4 255.255.255.0
duplex auto
speed auto

clock set 10:30:00 22 Feb 2012
ntp master 2
ntp authentication-key 1 md5 cisco
ntp trusted-key 1

 

Enjoy !

Tom

 

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About ccie4all
Hello, and welcome to the first post of my CCIE blog This blog has got one simple goal and that is to improve our skills in Cisco Networking field so we can become best engineers on a job market. Wordpress Blog https://ccie4all.wordpress.com/ information about the changes made to Gns3 BGP , MPLS and R&S CCIE labs. In order to access and download all provided materials and receive important updates from Gns3 BGP , MPLS and R&S CCIE labs under GNS3 tab in the main header please go ahead and subscribe to https://ccie4all.wordpress.com/ ! All other posts have not been affected and can be accessed at any given time. Enjoy ! Tom

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