KB2002.102
FAQ: How to configure Cisco routers to use a Domain Time II server as a time source."

This article applies to Domain Time.

Last updated: 8/6/2003

Question:

    How do I configure Cisco routers to use a Domain Time II server as a time source?

Answer:

    Domain Time II can act either as a time source for all Cisco routers (recommended), or to use the router as its time source if required.

    Cisco routers use differing time protocols and configuration commands depending on version of router and IOS. Certain Cisco routers (such as 1003, 1004, 1005, 1600, 1720, 1750) can only use SNTP as their time protocol and can only act as time clients. Other Cisco routers use NTP, with additional options to act as a time server, with options NTP authentication, peering, and other configuration paramenters.

Details:

    For Cisco 1003, 1004, 1005, 1600, 1720, 1750 routers, the command to configure them as a time client is:
      sntp server [ip address]
    where [ip address] is the IP address of the Domain Time Server you wish to use a time source for this router.

    Other Cisco routers use the command to configure these routers as a time client is:

      ntp server [ip address]
    where [ip address] is the IP address of the Domain Time Server you wish to use a time source. The use of the Cisco NTP peering or broadcast options are not recommended.

    See the Cisco documentation for more information on configuring routers to use external time sources.

    To use Cisco routers as a time source for Domain Time II, first configure your router as an NTP time server according to the manufacturer's instructions, then enter the IP address (or DNS name) of the Cisco router as an entry on the Time Source page of the the Domain Time II control panel applet and specify the SNTP/NTP protocol.

Domain Time II Software distributed by Symmetricom, Inc.
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