Welcome to Bruno Bonfils's (aka asyd homepage).
Network Time ProtocolMulticastMy cisco (router or switch) send the current date via NTP multicast message, I use the following configuration : ! ntp peer 192.168.34.3 ntp source Vlan34 ntp authentication-key 1 mdr MY-SECRET-KEY ! interface vlan34 ntp multicast key 1 ! /etc/ntp.conf restrict default noquery notrust nomodify restrict 127.0.0.1 keys /etc/ntp.keys trustedkey 1 multicastclient 224.0.1.1 driftfile /var/lib/ntp/ntp.drift /etc/ntp.keys 1 M MY-SECRET-KEYS Check if the ntpd accept the multicast messages :
# sudo ntpq -n
ntpq> pe
remote refid st t when poll reach delay offset jitter
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*192.168.1.252 192.168.34.3 3 - 1 64 377 1.143 -4.698 0.173
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