Requesting to Include the keyword 'pool' in the ntp.conf file.
At present, the vyos router can configure NTP with the following lines
set system ntp listen-address '192.168.1.1' set system ntp server 0.us.pool.ntp.org set system ntp server 1.us.pool.ntp.org set system ntp server 2.us.pool.ntp.org set system ntp server 3.us.pool.ntp.org
Each NTP server must be listed individually.
an option is to configure using a line like
set system ntp pool 0.us.pool.ntp.org
the NTP client will resolve all IP from that hostname and used then as NTP sources.
This would be in addition to using the server keyword.
In a sense one could mixed both like:
set system ntp pool us.pool.ntp.org set system ntp server 3.us.pool.ntp.org prefer