Issue the undebug all or the no debug ntp all command to turn off debugging.

CCNA Security All contents are Copyright © 1992 –2012 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 23 of 57 NTP packets debugging is on Dec 17 20.12:18.554: NTP message sent to 10.1.1.2, from interface Serial000 10.1.1.1. Dec 17 20.12:18.574: NTP message received from 10.1.1.2 on interface Serial000 10.1.1.1. Dec 17 20:12:18.574: NTP CoreDEBUG: ntp_receive: message received Dec 17 20:12:18.574: NTP CoreDEBUG: ntp_receive: peer is 0x645A3120, next action is 1. Dec 17 20:12:18.574: NTP CoreDEBUG: receive: packet given to process_packet Dec 17 20:12:18.578: NTP CoreINFO: system event event_peerstrat_chg 0x04 status sync_alarm, sync_ntp, 5 events, event_clock_reset 0xC655 Dec 17 20:12:18.578: NTP CoreINFO: synchronized to 10.1.1.2, stratum 3 Dec 17 20:12:18.578: NTP CoreINFO: system event event_sync_chg 0x03 status leap_none, sync_ntp, 6 events, event_peerstrat_chg 0x664 Dec 17 20:12:18.578: NTP CoreNOTICE: Clock is synchronized. Dec 17 20:12:18.578: NTP CoreINFO: system event event_peerstrat_chg 0x04 status leap_none, sync_ntp, 7 events, event_sync_chg 0x673 Dec 17 20:12:23.554: NTP: Calendar updated.

d. Issue the undebug all or the no debug ntp all command to turn off debugging.

R1 undebug all e. Verify the time on R1 after it has made an association with R2. R1 show clock 20:12:24.859 UTC Wed Dec 17 2008 Step 3: Optional Configure R1 and R3 as NTP clients using CCP. You can also use CCP to configure the router to support NTP. If you configured R1 as an NTP client using Cisco IOS commands in Step 2, you can skip this step. However, read through it to become familiar with the process. If you configured R1 and R3 as NTP clients using Cisco IOS commands in Step 2, you can still perform this step but you need to issue the following commands first on each router. R1config no ntp server 10.1.1.2 R1config no ntp update-calendar a. From the CLI, enable the http server on R1. R1config ip http server R1config username admin privilege 15 secret cisco12345 R1config ip http authentication local b. Start CCP on PC-A. In the Mange Devices window, add the R1 IP address 192.168.1.1 in the first IP address field. Enter admin in the Username field, and cisco12345 in the Password field. Click the OK button. CCNA Security All contents are Copyright © 1992 –2012 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 24 of 57 ` c. At the CCP Dashboard, click the Discover button to discover and connect to R1. If discovery fails, use the Discovery Details button to determine what the problem is. Resolve it. CCNA Security All contents are Copyright © 1992 –2012 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 25 of 57 d. To configure an NTP server, click the Configure button and choose Router Time NTP and SNTP. Click Add. e. In the NTP Server IP Address field, enter the IP address of the R2 master NTP router 10.1.1.2 and click OK. CCNA Security All contents are Copyright © 1992 –2012 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 26 of 57 f. In the Deliver Configuration to Router window, make sure that the Save running config to router’s startup config check box is checked and click Deliver.

g. Click OK in the Commands Delivery Status window.