66A maximum of 128 keys can be set for the device by repeatedly executing the command.Examples# Set an MD5 authentication key, with the key ID of 10 and key value of BetterKey, in simple text. system-view[Sysname] sntp authentication enable[Sysname] sntp authentication-keyid 10 authentication-mode md5 simple BetterKeyRelated commands• sntp authentication enable• sntp reliable authentication-keyidsntp ipv6 unicast-serverUse the sntp ipv6 unicast-server command to specify an IPv6 NTP server for the device.Use the undo sntp ipv6 unicast-server command to remove the IPv6 NTP server specified for the device.Syntaxsntp ipv6 unicast-server { ipv6-address | server-name } [ vpn-instance vpn-instance-name ][ authentication-keyid keyid | source interface-type interface-number ] *undo sntp ipv6 unicast-server { ipv6-address | server-name } [ vpn-instance vpn-instance-name ]DefaultNo IPv6 NTP server is specified for the device.ViewsSystem viewPredefined user rolesnetwork-adminParametersipv6-address: IPv6 address of the NTP server.server-name: Host name of the NTP server, a case-insensitive string of 1 to 255 characters.vpn-instance vpn-instance-name: Specifies the MPLS L3VPN to which the NTP server belongs, wherevpn-instance-name is a case-sensitive string of 1 to 31 characters. If the NTP server is on the publicnetwork, do not specify this option.authentication-keyid keyid: Specifies the key ID to be used for sending NTP messages to the NTP server,where keyid is in the range of 1 to 4294967295. If this option is not specified, the local device and NTPserver do not authenticate each other.source interface-type interface-number: Specifies the source interface for IPv6 NTP messages. If thespecified IPv6 NTP server address is not a link local address, the source IPv6 address for IPv6 NTPmessages sent by the local device to the NTP server is the IPv6 address of the specified source interface.If the specified IPv6 NTP server address is a link local address, the IPv6 NTP messages are sent from thespecified source interface, and the source address of the messages is the link local address of theinterface. interface-type interface-number represents the interface type and number. If you do not specifyan interface, the device automatically selects the source IPv6 address of IPv6 NTP messages. For moreinformation, see RFC 3484.
