Time Configuration
To keep accurate timekeeping, its recommended that NTP (Network Time Protocol) be configured. In this example, we’ll walk through configuring NTP using the NTP Pool Project servers as our timekeeping source.
Start by specifying which interface NTP should use as its source IP address when communicating with the NTP time servers. This would be the interface you configured under the Management Interface article.
This will configure FastEthernet 0 has as your source interface.
ntp source FastEthernet 0
This will configure VLAN 100 has as your source interface.
ntp source Vlan100
Next, specify the time servers you’d like to use as your timekeeping source.
ntp server 3.pool.ntp.org minpoll 10
ntp server 1.pool.ntp.org minpoll 10
ntp server 2.pool.ntp.org minpoll 10
ntp server 0.pool.ntp.org minpoll 10
Lastly, specify your timezone.
clock timezone PST -8