（1） 交换机配置<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

 

// 配置CISCO 设备当前日期及时区

SW#

SW#conf t

SW(config)#clock timezone GMT +8

SW(config-if)#end

SW#clock set 11:05:00 8 apr 2009

 

// 配置接口IP，以实现与NTP服务器通信

SW#

SW#conf t

SW(config)#int f0/0

SW(config-if)#ip add 192.168.0.69 255.255.255.0

SW(config-if)#no shutdown

SW(config-if)#end

SW#

 

 

 

// 配置NTP Client，并指定NTP服务器

SW#

SW#conf t

SW(config)#service timestamps log datetime localtime

SW(config)#service timestamps debug datetime localtime

SW(config)#ntp server 192.168.0.168

SW(config)#ntp update-calendar // 如果有硬件时钟，同步设备硬件时钟

SW(config)#end

SW#

 

// 查询同步结果， 已经实现了同步

SW#show ntp status

Clock is synchronized, stratum 3, reference is 192.168.0.168

nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18

reference time is CD86975A.71DD2468 (11:24:10.444 GMT Wed Apr 8 2009)

clock offset is -0.1861 msec, root delay is 87.49 msec

root dispersion is 44.14 msec, peer dispersion is 6.87 msec

SW#

SW#show ntp associations

 

      address         ref clock     st  when  poll reach  delay  offset    disp

*~192.168.0.168    210.72.145.44     2    43    64  377    12.1   -9.25    11.0

 * master (synced), # master (unsynced), + selected, - candidate, ~ configured

 

SW#show clock       

11:26:20.286 GMT Wed Apr 8 2009

SW#show clock detail

11:26:25.186 GMT Wed Apr 8 2009

Time source is NTP

SW#

 

(2) 路由器配置

 

// 配置CISCO 设备当前日期及时区

Router#

Router#conf t

Router(config)#clock timezone GMT +8

Router(config)#en

Router#clock set 11:28:00 8 apr 2009

 

// 配置接口IP，以实现与NTP服务器通信

Router#

Router#conf t

Router(config)#int f0/0

Router(config-if)#ip add 192.168.0.70 255.255.255.0

Router(config-if)#no shutdown

 

// 配置NTP Client，并指定NTP服务器

Router#

Router#conf t

Router(config)#ntp server 192.168.0.168

Router(config)#ntp update-calendar // 如果有硬件时钟，同步设备硬件时钟

Router(config)#end

Router#

 

// 查询同步结果， 已经实现了同步

Router#show ntp status

Clock is synchronized, stratum 14, reference is 192.168.0.168

nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18

reference time is CD869958.18F04EA3 (11:32:40.097 GMT Wed Apr 8 2009)

clock offset is 0.0124 msec, root delay is 8.30 msec

root dispersion is 15886.52 msec, peer dispersion is 15875.02 msec

 

Router#show ntp associations

      address         ref clock     st  when  poll reach  delay  offset    disp

*~192.168.0.168    127.127.1.0      13     0    64  177     4.2    0.63   126.0

 * master (synced), # master (unsynced), + selected, - candidate, ~ configured

 

Router#show clock

11:32:50.593 GMT Wed Apr 8 2009

 

Router#show clock detail

11:32:58.405 GMT Wed Apr 8 2009

Time source is NTP