Dell PowerEdge VRTX - Manual (Page 77)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSystemConfig.fm
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This is configured by the user in the SNTP Global Settings page.
On power up, when the switch sends a request and there is no reply, it issues
another request (three retries at most) after 20 seconds of waiting.
If no SNTP server is found, the process is invoked every “poll interval” (set in
the SNTP Global Settings page), and a management trap is triggered.
Authentication
You can require that SNTP servers be authenticated, although this is not
mandatory (see the SNTP Authentication pages).
MD5 (Message Digest 5) Authentication safeguards device synchronization
paths to SNTP servers. MD5 is an algorithm that produces a 128-bit hash
value. MD5 is a variation of MD4, and increases MD4 security.
MD5 both verifies the integrity of the communication and authenticates the
origin of the communication.
SNTP Global Settings
If SNTP was selected as the clock source in the Global Settings page, you
must define the mechanism of setting time from an SNTP server. This is
done in the SNTP pages, described below.
To define the types of server from which the device accepts SNTP
information and the polling interval:
1 Click System > Time Synchronization > SNTP Global Settings in the
tree view to display the SNTP Global Settings page.
2 Enter the fields:
– Poll Interval (60-86400) — Enter the interval (in seconds) at which
the SNTP servers are polled.
– Receive Broadcast Servers Updates — Enable/disable receiving time
information from Broadcast servers.
– Receive Anycast Servers Updates — Enable/disable receiving time
information from Anycast SNTP servers.
– Receive Unicast Servers Updates — Enable/disable receiving time
information from the SNTP servers defined on the switch.
– Poll Unicast Requests — Enable/disable sending SNTP Unicast server
time information requests to the SNTP server.