Step Description Command Keys
3 Set authentication key (optional). esr(config-ntp)# key <ID> <ID> – key identifier, set in the range of
[1..255].
4 Set the maximum time interval between
sending messages to the NTP server
(optional).
esr(config-ntp)# maxpoll
<INTERVAL>
<INTERVAL> – maximum value of poll
interval. The command parameter is
used as an indicator of the power of
two when calculating the interval
durability in seconds; it is calculated by
raising two to power that is specified by
the command parameter, takes the
value of [10..17].
Default value:
10 (2
10
= 1024 seconds or 17 minutes 4
seconds).
5 Set the minimum time interval between
sending messages to the NTP server
(optional).
esr(config-ntp)# minpoll
<INTERVAL>
<INTERVAL> – minimum value of poll
interval in seconds; it is calculated by
raising two to power that is specified by
the command parameter, takes the
value of [4..6].
Default value:
6 (2
6
= 64 seconds or 1 minutes 4
seconds)
6 Mark this NTP server as preferred
(optional).
esr(config-ntp)# prefer
7 Define a list of trusted IP addresses
with which ntp packets can be
exchanged (optional).
esr(config)# ntp access-
addresses <NAME>
<NAME> – IP addresses profile name,
set by the string of up to 31 characters.
8 Specify the key ID from the key binding
profile (optional).
esr(config)# ntp
authentication trusted-key
<ID>
<ID> – key ID from the key binding
profile.
9 Specify the key binding profile name
(optional).
esr(config)# ntp
authentication key-chain
<WORD>
<WORD> – key binding profile name.
10 Activate key-based authentication for
NTP (optional).
esr(config)# ntp
authentication enable
11 Enable the mode of receiving broadcast
messages from NTP servers for the
global configuration and all existing
VRFs (optional).
esr(config)# ntp
broadcast-client enable
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