ARST-ND-000600 - The Arista network device must be configured to synchronize internal system clocks using redundant authenticated time sources.


The loss of connectivity to a particular authoritative time source will result in the loss of time synchronization (free-run mode) and increasingly inaccurate time stamps on audit events and other functions.

Multiple time sources provide redundancy by including a secondary source. Time synchronization is usually a hierarchy; clients synchronize time to a local source while that source synchronizes its time to a more accurate source. The network device must utilize an authoritative time server and/or be configured to use redundant authoritative time sources. This requirement is related to the comparison done in CCI-001891.

DOD-approved solutions consist of a combination of a primary and secondary time source using a combination or multiple instances of the following: a time server designated for the appropriate DOD network (NIPRNet/SIPRNet); United States Naval Observatory (USNO) time servers; and/or the Global Positioning System (GPS). The secondary time source must be located in a different geographic region than the primary time source.

Satisfies: SRG-APP-000373-NDM-000298, SRG-APP-000374-NDM-000299, SRG-APP-000375-NDM-000300, SRG-APP-000395-NDM-000347


Configure the Arista network device for at least two trusted time sources and to use cryptographic authentication with the following command example:

switch(config)#ntp authentication-key 12 sha1 0 <key>
switch(config)#ntp trusted-key 12
switch(config)#ntp authenticate servers
switch(config)#ntp local-interface Management1
switch(config)#ntp server prefer key 12
switch(config)#ntp server key 12

Configure the local time zone for the device.

switch(config)#clock timezone <timezone>

See Also

Item Details


References: 800-53|AU-8(2), 800-53|AU-8b., 800-53|IA-3(1), CAT|II, CCI|CCI-001889, CCI|CCI-001890, CCI|CCI-001893, CCI|CCI-001967, Rule-ID|SV-255958r882216_rule, STIG-ID|ARST-ND-000600, Vuln-ID|V-255958

Plugin: Arista

Control ID: d786ae0442d695c99034440d01923fe6afc7d3358ba5ac1e956621ac46d3c0f5