Network Time Protocol (NTP)
The affection of the time account is the arrangement clock. The arrangement alarm starts at the alpha of every arrangement startup befitting of the accepted date and time. The arrangement alarm keeps clue of time internally based on UTC, additionally accepted as Greenwich Mean (GMT). Bounded time area and aurora accumulation time charge be configured to reflect the actual time about to the bounded time zone.
Note
On the high-end routers such as the 7500 and 12000 Series, the arrangement keeps time on an centralized clock, appropriately time is not
lost during a reboot.
NTP is advised to accord the time on the accessory clock. An NTP arrangement usually gets its time from an accurate time
source, such as a radio alarm or an diminutive alarm absorbed to a time server.
NTP is capital for syslog messages, and for troubleshooting and alternation activities. NTP uses UDP anchorage 123 as both the
source and destination and can be anchored application an affidavit apparatus that uses the MD5 algorithm. The ntp command
from the all-around agreement approach can be acclimated for all NTP-related configurations in the Cisco IOS.