934 CHAPTER 55: NTP C ONFIGURATION COMMANDSBy default, there is no authentication key.Only MD5 authentication is supported for the NTP authentication key settings.Example# Set MD5 authentication key 10 as 3com. system-viewSystem View: return to User View with Ctrl+Z.[SW8800] ntp-service authentication-keyid 10 authentication-mode md5 3comntp-servicebroadcast-clientSyntaxntp-service broadcast-clientundo ntp-service broadcast-clientViewVLAN interface viewParameterNoneDescriptionUse the ntp-service broadcast-client command to configure NTP broadcastclient mode.Use the undo ntp-service broadcast-client command to disable the NTPbroadcast client mode.By default, the NTP broadcast client mode is disabled.Designate an interface on the local Ethernet Switch to receive NTP broadcastmessages and operate in broadcast client mode. The local Ethernet Switch listensto the broadcast from the server. When it receives the first broadcast packet, itstarts a brief Client/Server mode to switch messages with a remote server forestimating the network delay. Thereafter, the local Ethernet Switch entersBroadcast Client mode and continues listening to the broadcast and synchronizesthe local clock according to the arrived broadcast message.Example# Configure to receive NTP broadcast packets through Vlan-Interface1. system-viewSystem View: return to User View with Ctrl+Z.[SW8800] interface vlan-interface1[3Com-Vlan-interface1] ntp-service broadcast-clientntp-servicebroadcast-serverSyntaxntp-service broadcast-server [ authentication-keyid keyid version number ]undo ntp-service broadcast-server
