1-6NTP implementation mode Configuration on S5600 series switchesMulticast modez Configure the local S5600 Ethernet switch to work in NTPmulticast server mode. In this mode, the local switchsends multicast NTP messages through the VLANinterface configured on the switch.z Configure the local S5600 Ethernet switch to work in NTPmulticast client mode. In this mode, the local switchreceives multicast NTP messages through the VLANinterface configured on the switch.z When an H3C S5600 Ethernet switch works in server mode or symmetric passive mode, you neednot to perform related configurations on this switch but do that on the client or the symmetric-activepeer.z The NTP server mode, NTP broadcast mode, or NTP multicast mode takes effect only after thelocal clock of the H3C S5600 Ethernet switch has been synchronized.z When symmetric peer mode is configured on two Ethernet switches, to synchronize the clock of thetwo switches, make sure at least one switch’s clock has been synchronized.NTP Configuration Task ListComplete the following tasks to configure NTP:Task RemarksConfiguring NTP Implementation Modes RequiredConfiguring Access Control Right OptionalConfiguring NTP Authentication OptionalConfiguring Optional NTP Parameters OptionalDisplaying NTP Configuration OptionalConfiguring NTP Implementation ModesAn S5600 Ethernet switch can work in one of the following NTP modes:z Configuring NTP Server/Client Modez Configuring the NTP Symmetric Peer Modez Configuring NTP Broadcast Modez Configuring NTP Multicast ModeTo protect unused sockets against attacks by malicious users and improve security, H3C S5600 seriesEthernet switches provide the following functions:
