Spectracom NetClock 9400 Series, Руководство пользователя

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Fill in the fields:
Restriction Type —Choose either Allow or Deny.
If you select “Deny”, the configured portion of the network will not have
NTP access to NetClock, but the rest of the network will have access to
NetClock. If you select “allow”, the configured portion of the network will
have NTP access to NetClock, but the rest of the network will not have
access to NetClock. By default, NetClock allows all IPv4 and IPv6 con
nections.
IP Version —Choose IPv4 or IPv6
IP Address —Enter the appropriate hostname.
Subnet Mask —Enter the appropriate IP mask.
Require Authentication (checkbox)—Check this box if you want the addi
tional security of authorized access. NetClock to accept only authenticated
requests (MD5 or Autokey) from this user or network segment.
Allow NTP Queries (checkbox)—Check this box if you want to allow
external NTP queries into NetClock services.
5.
Click the Submit button.
2.15.11 Enabling/Disabling NTP Broadcasting
The NTP Broadcast mode is intended for one or a few servers and many clients. NetClock
allows the NTP service to be configured to broadcast the NTP time only to the network’s broad
cast address at scheduled intervals.
NTP Broadcasting is used to limit the NTP service to only certain clients on the network. NTP
Broadcasting also reduces the amount of network traffic, but is therefore less accurate since
there is no compensation for cable delays, or other delays between NTP Server and Client.
Note that NTP Broadcasting is rarely used and typically limited to special applications.
To enable NTP Broadcasting:
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NetClock User Reference Guide Rev. 16
2.15 Configuring NTP