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# Configuring NTP Broadcast Mode on a C Series Controller (SRC CLI)

Use the following configuration statements to configure NTP on a C Series Controller 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#
   `
2. (Optional) Specify the version of NTP to be used for outgoing packets.
   `
   [edit system ntp broadcast address ]
   user@host# set version version
   `
3. (Optional) Specify the time-to-live value to transmit.
   `
   [edit system ntp server address ]
   user@host# set ttl ttl
   `

#### Related Topics

- Configuring NTP Broadcast Mode on a C Series Controller (C-Web Interface)
- Specifying Which NTP Server a C Series Controller Contacts on Startup
- Verifying NTP Configuration on a C Series Controller
- NTP Support on C Series Controllers

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