Ntp Over Anycast - Safran SecureSync 2400 User Manual

2.15 Configure NTP
5. To utilize
6. Click Submit, or press Enter.
To disable
mit.
2.15.12

NTP over Anycast

NTP (Network Time Protocol) is a packet network based synchronization pro-
tocol for synchronizing a client clock to a network master clock (see also
figure NTP" on
Anycast
group of potential receivers via a single Anycast address, thus avoiding the need
to configure every client individually.
NTP over
concepts, allowing SecureSync to:
I. Associate one of its network ports to an Anycast IP address, and
II. Remove itself as an available time source if its reference is lost or degraded,
To learn more about NTP over Anycast, see also the respective
Please note that SecureSync utilizes the OSPF (Open Shortest Path First) and
BGP (Border Gateway Protocol).
O S P F
If an active SecureSync NTP server has removed itself as an available time source from
the Anycast-capable network, the OSPF router will send a request for replacement to
the next nearest NTP server, serving under the same NTP over Anycast address.
As soon as the first SecureSync server obtains a valid reference again, it will make itself
available to the OSPF router, which will then use it as a time source again, based on the
principle of shortest path available.
136
SecureSync will also send unsolicited NTP time packets to the local broad-
cast address at the Broadcast Interval specified by you.
MD5 Authentication, select a
NTP Symmetric Keys" on
NTP broadcasting, simply uncheck the Broadcast box and click Sub-
page 113.)
is a network routing protocol in which messages are routed to one of a
Anycast, as implemented in SecureSync, is a combination of the two
and vice versa.
P r o t o c o l
Symmetric Key
page 130.)
E X A M P L E :
CHAPTER
2
(see "Configuring
Safran Tech
•
SecureSync 2400 User Manual Rev. 5.2
"Con-
Note.