Microsemi SyncServer S350 - Addingmulticastassociations

Using NTP
Creating a broadcastclient association
To configure an NTP client as a broadcast client, consult the manufacturer's documentation.
To configure a generic NTP broadcast client with MD5 authentication, the user would upload
the ntp.keys file to the /etc directory and add the following lines to the ntp.conf file (example
values italicized):
broadcastclient
enable auth
keys /etc/ntp.keys
trustedkey 1
The key number identified by trustedkey must match the key number on the SyncServer or
broadcast server.
To configure a SyncServer as a broadcast client:
1.
Configure authentication. For example, use NTP - MD5 to upload the keys file.
2.
Add or edit an association on the NTP - Conf page.
3.
For Role, select Broadcast Client.
4.
For MD5, select the appropriate method and Key if needed.
5.
Click the SAVE button.
6.
Click the RESTART button. When the NTP daemon finishes restarting, it listens for broad-
cast messages.
Also see:
n Working with Generic NTP Devices (on page 160)
n Using MD5 Keys on a SyncServer (on page 161)
n Using NTP Authentication (on page 160)
AddingMulticastAssociations
NTP multicasting is similar to broadcasting, but uses a routable multicast address so that the
NTP messages can reach multiple subnets. Use the IANA-designated address for NTP mul-
ticasting, 224.0.1.1, or carefully select another non-conflicting address. Also take steps to
protect multicast messages from affecting neighboring networks.
Also see Adding Broadcast Associations (on page 156) and NTP - Config (on page
43).
Configuring the multicast server
To configure a SyncServer as a multicast server:
1. Configure authentication as described in Using NTP Authentication (on page 160).
For example, use NTP - MD5 to generate and download keys to your workstation.
2.
Add or edit an association on the NTP - Conf page.
3.
For Role, select Broadcast.
4.
For Address, enter 224.0.1.1 (or another carefully selected non-conflicting address)
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