31. NTP Client DescriptionMN700004 Rev 01 345Command Syntaxdevice-name(config)#time-server ntp showExampleThe following example displays the three existing NTP servers.device-name(config)#time-server ntp showCurrent NTP server(s):186.102.20.11182.21.2.31128.11.24.6MD5 AuthenticationNTP supports MD5 authentication. When using MD5 for the first time, you must assign it akey, consisting of a key ID and a plain text key. Only one key can be defined.The key ID is a number in the range <1-65535>. The plain text key is a string of 1 to 20 non-blank characters (some special characters, such as question marks, are not allowed). The keyauthentication is case-sensitive (it distinguishes between capital and small letters). Once thekey has been defined, NTP will use it to authenticate incoming data for all defined servers,until the key is deleted.Servers that don't use authentication or servers that use an incorrect NTP key for an associatedNTP client will be ignored.Description of Commandstime-server ntp key addThe time-server ntp key add command, in Global Configuration mode, defines the MD5authentication key.Time synchronization can be authenticated to ensure that the local switch obtains its timeservices only from known sources. This authentication key must be coordinated with theadministrator of the NTP server and must be matched by the servers used by the switch tosynchronize its time to the NTP server.By default, network time synchronization is unauthenticated.Command Syntaxdevice-name(config)#time-server ntp key add KEYArgument DescriptionKEY-ID A number in the range <1-65535>.
