Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 1004
Con a source IP address for NTP packets, Con NTP authentication, Command Syntax
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www.dell.com | support.dell.com Configure a source IP address for NTP packets By default, the source address of NTP packets is the IP address of the interface used to reach the network. You can configure one interface's IP address to be included in all NTP packets. To configure an IP address as the source address of NTP packets, use the following command in the CONFIGURATION mode: Command Syntax ntp source interface Command Mode Purpose CONFIGURATION Enter the following keywords and slot/port or number information: • For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet followed by the slot/port information. • For a loopback interface, enter the keyword loopback followed by a number between 0 and 16383. • For a port channel interface, enter the keyword lag followed by a number from 1 to 255 for TeraScale and ExaScale. • For a SONET interface, enter the keyword sonet followed by the slot/port information. • For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet followed by the slot/port information. • For a VLAN interface, enter the keyword vlan followed by a number from 1 to 4094. E-Series ExaScale platforms support 4094 VLANs with FTOS version 8.2.1.0 and later. Earlier ExaScale supports 2094 VLANS. To view the configuration, use the show running-config ntp command in the EXEC privilege mode. Configure NTP authentication NTP authentication and the corresponding trusted key provide a reliable means of exchanging NTP packets with trusted time sources. NTP authentication begins when the first NTP packet is created following the configuration of keys. NTP authentication in FTOS uses the MD5 algorithm and the key is embedded in the synchronization packet that is sent to an NTP time source. Note: NTP authentication is supported for the client only. FTOS Behavior: FTOS versions 8.2.1.0 and later use an encryption algorithm to store the authentication key that is different from previous FTOS versions; beginning in version 8.2.1.0, FTOS uses DES encryption to store the key in the startup-config when you enter the command ntp authentication-key. Therefore, if your system boots with a startup-configuration from an FTOS versions prior to 8.2.1.0 in which you have configured ntp authentication-key, the system cannot correctly decrypt the key, and cannot authenticate NTP packets. In this case you must re-enter this command and save the running-config to the startup-config. 1004 | System Time and Date
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