Operation Manual – NTPH3C S7500 Series Ethernet Switches Chapter 1 NTP Configuration1-5Table 1-1 describes how the above mentioned NTP modes are implemented on anS7500 series switch.Table 1-1 NTP implementation modes on an S7500 series switchNTP implementationmode Configuration on S7500 switchesClient/Server modeConfigure the S7500 switch to operate in the NTP servermode. In this case, the remote server operates as thelocal time server, and the S7500 switch operates as theclient.Peer modeConfigure the S7500 switch to operate in NTP peer mode.In this case, the remote server operates as the peer of theS7500 switch, and the S7500 switch operates as theactive peer.Broadcast modez Configure the S7500 switch to operate in NTPbroadcast server mode. In this case, the S7500 switchbroadcasts NTP packets through the VLAN interfaceconfigured on the switch.z Configure the S7500 switch to operate in NTPbroadcast client mode. In this case, the S7500 switchreceives broadcast NTP packets through the VLANinterface configured on the switch.Multicast modez Configure the S7500 switch to operate in NTPmulticast server mode. In this case, the S7500 switchsends multicast NTP packets through the VLANinterface configured on the switch.z Configure the S7500 switch to operate in NTPmulticast client mode. In this case, the S7500 switchreceives multicast NTP packets through the VLANinterface configured on the switch.1.2 NTP Implementation Mode ConfigurationA switch can operate in the following NTP modes:z NTP client modez NTP server modez NTP peer modez NTP broadcast server modez NTP broadcast client modez NTP multicast server modez NTP multicast client mode1.2.1 PrerequisitesWhen an S7500 switch operates in NTP server mode or NTP peer mode, you need toperform configuration on the client or the active peer only. When an S7500 switch
