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Configuring NTP to Operate in Broadcast Mode

Use the following configuration statements to configure NTP on a C-series platform to operate in broadcast mode:

system ntp broadcast address {
    ttl ttl; 
    version version; 
}

To configure NTP to operate in broadcast mode:

  1. From configuration mode, access the configuration statement that configures NTP broadcast and specify the broadcast address on one of the local networks or a multicast address assigned to NTP. You can specify an IP address or a hostname.

We recommend that you use the multicast address 224.0.1.1 because the Internet Assigned Numbers Authority (IANA) assigns this address for NTP; however, you can use a different address for local deployments.

[edit system ntp]
user@host# edit broadcast address

For example, to specify the broadcast address of 244.0.1.1:

[edit system ntp]
user@host# edit broadcast 224.0.1.1

[edit system ntp broadcast 224.0.1.1]
user@host#

  1. (Optional) Specify the version of NTP to be used for outgoing packets.
  2. [edit system ntp broadcast address]
    
    user@host# set version version
    
    
    
  3. (Optional) Specify the time-to-live value to transmit.
  4. [edit system ntp server address]
    
    user@host# set ttl ttl
    
    
    

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