配置NTP

红旗在飘扬

拓扑图：



R1配置：

1. Router>en
   
2. Router#conf t
   
3. Enter configuration commands, one per line.  End with CNTL/Z.
   
4. Router(config)#ho R1
   
5. 
   
6. R1(config)#do clock set 10:00:00 14 jun 2023
   
7. 
   
8. R1(config)#int g0/0
   
9. R1(config-if)#ip add 172.16.1.1 255.255.255.0
   
10. R1(config-if)#no sh
    
11. 
    
12. R1(config-if)#
    
13. %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up
    
14. 
    
15. %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
    
16. 
    
17. R1(config-if)#ex
    
18. 
    
19. R1(config)#ntp master
    
20. R1(config)#ntp authentication-key 1 md5 cisco 123
    
21. R1(config)#ntp trusted-key 1
    
22. R1(config)#ntp authenticate

复制代码

S1配置：

1. Switch>en
   
2. Switch#conf t
   
3. Enter configuration commands, one per line.  End with CNTL/Z.
   
4. Switch(config)#ho S1
   
5. S1(config)#int vlan 1
   
6. S1(config-if)#ip add 172.16.1.100 255.255.255.0
   
7. S1(config-if)#no sh
   
8. 
   
9. S1(config-if)#
   
10. %LINK-5-CHANGED: Interface Vlan1, changed state to up
    
11. 
    
12. %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
    
13. 
    
14. S1(config-if)#ex
    
15. 
    
16. S1(config)#end
    
17. 
    
18. S1#ping 172.16.1.1
    
19. 
    
20. Type escape sequence to abort.
    
21. Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
    
22. .!!!!
    
23. Success rate is 80 percent (4/5), round-trip min/avg/max = 0/0/0 ms
    
24. 
    
25. S1#en
    
26. S1#conf t
    
27. Enter configuration commands, one per line.  End with CNTL/Z.
    
28. S1(config)#ntp server 172.16.1.1 key 1
    
29. S1(config)#ntp authentication-key 1 md5 cisco123
    
30. S1(config)#ntp authenticate
    
31. S1(config)#ntp trusted-key 1
    

复制代码

S1验证：

1. S1#show clock
   
2. *0:53:36.585 UTC Mon Mar 1 1993
   
3. 
   
4. S1#show ntp status
   
5. Clock is synchronized, stratum 4, reference is 172.16.1.1
   
6. nominal freq is 250.0000 Hz, actual freq is 249.9990 Hz, precision is 2**24
   
7. reference time is E80B38FA.0000036D (10:39:54.877 UTC Wed Jun 14 2023)
   
8. clock offset is 0.00 msec, root delay is 0.00  msec
   
9. root dispersion is 10.35 msec, peer dispersion is 0.12 msec.
   
10. loopfilter state is 'CTRL' (Normal Controlled Loop), drift is - 0.000001193 s/s system poll interval is 4, last update was 1 sec ago.
    
11. 
    
12. S1#show clock
    
13. 10:39:49.935 UTC Wed Jun 14 2023

复制代码

20664212