In the example shown in the following figure, SW#1 synchronizes its clock from the 0-3.us.pool.ntp.org timer server, and provides the synchronized clock information to SW#2 as a unicast message, and to SW#3 as a broadcast message.
SW#2 configures SW#1 as a time server using a normal unicast message. It also has a local clock (127.127.1.1) with a stratum level of 10. SW#3 is configured as broadcast client without specific server information. For security purposes, SW#2 and SW#3 use RSA Data Security, Inc. MD5 Message-Digest Algorithm authentication with a key index of 100.
create vlan internet create vlan toSW2 create vlan toSW3 config vlan internet add port 1 config vlan toSW2 add port 2 config vlan toSW3 add port 3 config vlan internet ipaddress 10.45.203.74/24 config vlan toSW2 ipaddress 100.1.1.1/24 config vlan toSW3 ipaddress 102.1.1.1/24 config iproute add default 10.45.203.1 vr vr-default enable ntp create ntp key 100 md5 EXTREME config ntp key 100 trusted enable ntp vlan internet enable ntp vlan toSW2 enable ntp vlan toSW3 enable ntp vlan toSW3 broadcast-server key 100 config ntp server add 0.us.pool.ntp.org config ntp server add 1.us.pool.ntp.org config ntp server add 2.us.pool.ntp.org config ntp server add 3.us.pool.ntp.org config ntp local-clock stratum 10
create vlan toSW1 config vlan toSW1 add port 1 config vlan toSW1 ipaddress 100.1.1.2/24 enable ntp enable ntp vlan toSW1 config ntp server add 100.1.1.1
create vlan toSW1 config vlan toSW1 add port 1 config vlan toSW1 ipaddress 102.1.1.2/24 enable ntp enable ntp broadcast-client create ntp key 100 md5 EXTREME config ntp key 100 trusted enable ntp vlan toSW1