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PowerConnect 5548 : SNTP setup using OpenManage Administrator
Hello all,
I have few PowerConnect 5548 (v 4.0.0.3) that I need to SNTP.
I dont have internal central sntp server so I would like to have the switches sync directly from internet sntp server.
I am logged onto OpenManage Web Interface.
Time Sync -> Global Settings [ Clock Source : SNTP ]
Time Sync -> SNTP Global Settings [ Receive Broadcast Servers Updates : Enable or Disable? ]
Time Sync -> SNTP Global Settings [ Receive Anycast Servers Updates : Enable or Disable? ]
Time Sync -> SNTP Global Settings [ Receive Unicast Servers Updates : Enable or Disable? ]
Time Sync -> SNTP Global Settings [ Poll Unicast Requests : Enable or Disable? ]
Time Sync -> SNTP Servers [ 3ea sntp server ip addresses listed (64.147.116.229, 69.25.96.13, 207.200.81.113) ]
Time Sync -> SNTP Interface Settings [ VLAN1 : Enabled ]
I'm not sure if I'm supposed to Enable or Disable settings in red.
Also could someone confirm if my setup is correct to sync from outside SNTP servers?
Also do I need to open up ports on firewall?
Any help would be greatly appreciated.
DELL-Willy M
802 Posts
2
April 17th, 2012 13:00
There is some good information on setting the switch System Time from an SNTP Server starting on page 115 of the User Guide.
User Guide:
support.dell.com/.../en_ug.pdf
SNTP Server Types
The switch can accept time information from the following server types:
• Unicast
Polling for Unicast information is used for polling a server whose IP
address is known. This is the preferred method for synchronizing device
time, as it is most secure.
Up to eight SNTP servers can be defined.
If this method is selected, SNTP information is accepted only from SNTP
servers defined in the SNTP Servers page.
Time levels T1 - T4 (see the "Algorithm for Selecting Designated SNTP
Server" on page 118 section) are used to determine from which server time
information is accepted.
If Unicast polling is not enabled or if no servers are defined on the device,
the device accepts time information from any SNTP server of the type that
is enabled, which responds.
• Anycast
Polling for Anycast information is used when the SNTP server’s IP address
is not defined or it cannot be reached. If this method is enabled, time
information can be received from any SNTP server on the network. The device time and date are synchronized when it proactively requests
synchronization information.
Anycast polling to get time information is preferable to Broadcast polling,
because it is more secure.
Time levels T3 and T4 are used to determine from which server time
information is accepted.
• Broadcast
Broadcast information is used if receiving Broadcast packets has been
enabled, and one of the following situations occurs:
– The SNTP server IP address has not been defined.
– Several time-information packets are received and the Broadcast time
is best according to the algorithm defined in "Algorithm for Selecting
Designated SNTP Server" on page 118.
Broadcast is the least secure method of receiving time, because it is both
unsecured and the time information was not specifically requested by the
device. Anycast is also unsecured, but time-information packets are only
accepted if they were requested.