Dell PowerSwitch S4112F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 505
Source IP address, Authentication
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Source IP address Configure one interface IP address to include in all NTP packets. The source address of NTP packets is the interface IP address the system uses to reach the network by default. • Configure a source IP address for NTP packets in CONFIGURATION mode. ntp source interface - ethernet - Enter the keyword and node/slot/port information. - port-channel - Enter the keyword and number. - vlan - Enter the keyword and VLAN number (1 to 4093). - loopback - Enter the keyword and number (0 to 16383). - mgmt - Enter the keyword and node/slot/port information (default 1/1/1). Configure source IP address OS10(config)# ntp source ethernet 1/1/10 View source IP configuration OS10(config)# do show running-configuration | grep source ntp source ethernet1/1/1 Authentication NTP authentication and the corresponding trusted key provide a reliable exchange of NTP packets with trusted time sources. NTP authentication begins with the creation of the first NTP packet after key configuration. NTP authentication uses the message digest 5 (MD5) algorithm. The key is embedded in the synchronization packet that is sent to an NTP time source. 1 Enable NTP authentication in CONFIGURATION mode. ntp authenticate 2 Set an authentication key number and key in CONFIGURATION mode (1 to 4294967295). ntp authentication-key number md5 key • The number must match in the ntp trusted-key command. • The key is an encrypted string. 3 Define a trusted key in CONFIGURATION mode (1 to 4294967295). The number must match in the ntp trusted-key command. ntp trusted-key number 4 Configure an NTP server in CONFIGURATION mode. ntp server {hostname | ipv4-address | ipv6-address} [key keyid] [prefer] • hostname - Enter the keyword to see the IP address or host name of the remote device. • ipv4-address - Enter an IPv4 address in A.B.C.D format. • ipv6-address - Enter an IPv6 address in nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn format (elision of zeros is supported). • key keyid - Enter a text string as the key exchanged between the NTP server and the client. • prefer - Enter the keyword to set this NTP server as the preferred server. 5 Configure the NTP master and enter the stratum number that identifies the NTP server hierarchy in CONFIGURATION mode (2 to 10, default 8). ntp master Configure NTP OS10(config)# ntp authenticate OS10(config)# ntp trusted-key 345 System management 505