Step 5 - Again check the system time in the Cisco Router "OmniSecuR1" using "show clock detail" as shown below. After the configuration, OmniSecuR1 will start synchronizing its time from NTP server pools "" and "".Ĭlick the following links to find FQDNs / IP Addresses of public NTP pools, Stratum-1 NTP Servers and Stratum-2 NTP Servers. Step 4 - Instruct the Cisco Router OmniSecuR1 to use "" and "" as NTP Servers. You can see that NTP is not configured and output shows " No time source". Step 3 - Check the current system time in the Cisco Router "OmniSecuR1" using "show clock detail" as shown below. OmniSecuR1(config)#ip name-server 8.8.8.8 But, the NTP time synchronization will fail if the IP address of the NTP Server / Server Pool is changed. You can configure the IP Address of the NTP Server / Server Pool also. Configure Gateway of last resort according to your network topology.Įnabling name resolution and configuring the Cisco Router / Switch with an IP address of a DNS Server is important, because we need to resolve the FQDN of NTP Server / Server Pool to an IP address. Use 192.168.1.1 as Gateway of last resort. Step 2 - Enable name resolution in Cisco Router "OmniSecuR1" and configure the Cisco Router "OmniSecuR1" to use 8.8.8.8 (Google public DNS Server) as the DNS Server. OmniSecuR3(config)#clock timezone OmniTZ 5 30 OmniSecuR2(config)#clock timezone OmniTZ 5 30 OmniSecuR1(config)#clock timezone OmniTZ 5 30 You should change it according to your time zone. "+5 30" is the time zone which currently I am residing. Use the following commands to configure proper time zone in your Cisco Router or Switch. Step 1 - Before configuring NTP, make sure that all Cisco Routers, and Switches are configured with same timezone.
Configure ip address cisco switch how to#
How to configure Cisco Router/Switch to Synchronize time from an internet NTP Time Server If one NTP server is failed, other server is available to provide time.Ĭlick the following links to find FQDNs / IP Addresses of public NTP pools, Stratum-1 NTP Servers and Stratum-2 NTP Servers. Using a pool as NTP Server is the better option, becuase pool is a cluster of NTP Time Servers. Here OmniSecuR1 is configured to synchronize its time with public NTP server pools and. We have three routers OmniSecuR1, OmniSecuR2 and OmniSecuR3. Other two Cisco Routers "OmniSecuR2" and "OmniSecuR3" is configured with "OmniSecuR1" as the NTP Time Server and synchronize it's time from "OmniSecuR1". Below lab topology, the Cisco Router "OmniSecuR1" is connected to internet directly and synchronize its time from public NTP time servers. In a network, if all the devices are not connected to internet directly, we can configure a Router (which is connected to internet) to synchronize its time from Public NTP Time Servers and remaining devices to syncronize from the first Router.
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