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Webcast-Catalyst9k
New Member

NTP server configuration

Hello!

Can anyone help me to configure one Cisco 3662 (IOS 12.1) to act as ntp server for my network?

At this moment i just have configured the cisco to get syncronization in one external NTP server and it works good.

Now I want to configure my router to be the ntp server for the other machines from my network, but apparently this not works.

My configuration is the following:

ntp access-group serve 3

ntp server xxx.xxx.xxx.xxx (the IP address for the external ntp server)

The access-list 3 contains the my ip subnets.

Thanks,

Nuno.

3 REPLIES
Bronze

Re: NTP server configuration

New Member

Re: NTP server configuration

Hi,

I configured NTP in my network.

I have a 3 levels architecture.

First level ( i.e IP address 10.10.10.10)

External router which gets clock through a public time reference :

ntp server 130.149.17.21

ntp server 138.96.64.10

ntp server 129.132.2.21 prefer

Second level (ie IP address 20.20.20.20)

Internal router which gets clock from the external router and gives clock to all other internal routers

ntp server 10.10.10.10 (address of the external router)

Third level

Internal routers and switches which get clock from the 'master' internal routeur (second level).

ntp server 20.20.20.20 (address of the internal 'master' router)

As you can see, there is no particular config on the internal 'master' router...

Use the following commands for troubleshooting :

- sho ntp status

- sho ntp association

New Member

Re: NTP server configuration

helo, i can´t get syncronizacion in one external NTP server.

Please get me a router configuration

Thanks.

Carlos

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