Operation Manual – NTPH3C S5500-EI Series Ethernet Switches Chapter 1 NTP Configuration1-91.3.1 Configuring NTP Server/Client ModeFor switches working in the server/client mode, you only need to make configurationson the clients, and not on the servers.Follow these steps to configure an NTP client:To do… Use the command… RemarksEnter system view system-view —Specify an NTPserver for theswitchntp-service unicast-server { ip-address |server-name } [ authentication-keyid keyid| priority | source-interface interface-typeinterface-number | version number ] *RequiredNo NTP serveris specified bydefault.Note:z In the ntp-service unicast-server command, ip-address must be a host address,rather than a broadcast address, a multicast address or the IP address of the localclock.z When the interface sending the NTP packet is specified by the source-interfaceargument, the source IP address of the NTP packet will be configured as theprimary IP address of the specified interface.z A switch can act as a server to synchronize the clock of other switches only after itsclock has been synchronized. If the clock of a server has a stratum level higher thanor equal to that of a client’s clock, the client will not synchronize its clock to theserver’s.z You can configure multiple servers by repeating the ntp-service unicast-servercommand. The clients will choose the optimal reference source.1.3.2 Configuring the NTP Symmetric ModeFor switches working in the symmetric mode, you need to specify a symmetric-passiveon a symmetric-active peer.
