Riverbed Optimization System (RiOS) must be configured to synchronize internal information system clocks with the primary and secondary time sources located in different geographic regions using redundant authoritative 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.

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Verify that RiOS is configured to synchronize internal information system clocks with the primary and secondary time sources located in different geographic regions. Navigate to the device CLI Type: enable Type: show ntp all Verify that at least two NTP Servers are configured -- or -- Navigate to the device Management Console Navigate to Configure >> System Settings >> Date and Time Verify that at least two servers are configured in the section "Requested Servers" If no NTP Servers are visible after the command 'show ntp all' or on "Requested Servers", this is a finding.

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Configure RiOS to synchronize internal information system clocks with the primary and secondary time sources located in different geographic regions. Navigate to the device CLI Type: enable Type: conf t Type: ntp server Type: ntp server enable Configure 2 NTP Servers Type: ntp enable Type: write memory -- or -- Navigate to the device Management Console Navigate to Configure >> System Settings >> Date and Time Click "Add a New NTP Server" Set the value of "Hostname or IP Address" to the required NTP Server Set the value of "Enabled/Disabled" to "Enabled" Click "Add" Configure 2 NTP Servers Click "Use NTP Time Synchronization" Click "Apply" Navigate to the top of the web page and click "Save" to save these settings permanently

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SV-77427r1_rule Riverbed Optimization System (RiOS) must be configured to synchronize internal information system clocks with the primary and secondary time sources located in different geographic regions using redundant authoritative time sources.

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