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Updated:December 13, 2018
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Configure a Unicast SNTP Server on ESW2-550X Switch
The Simple Network Time Protocol (SNTP) is a protocol used to synchronize the clocks of devices on a data network. The primary use of SNTP is to provide accuracy of events occurring on the device such as syslogs.
The objective of this document is to show you how to add an SNTP server to ESW2-550X switches.
• ESW2-550X-48DC-R • ESW2-550X-48-R
Unicast SNTP Server Configuration
Step 1. Log in to the switch configuration utility and choose Administration > Time Settings > SNTP Unicast. The SNTP Unicast page opens:
The Unicast SNTP Server Table displays the following information.
• SNTP Server — Displays the IP address of the SNTP server. The maximum of 8 NTP servers can be defined and the preferred server is chosen according to its stratum level.
• Poll Interval — Displays whether polling is enabled or disabled.
• Authentication Key ID — Indicates the key identification used to communicate between the SNTP sever and the switch.
• Stratum Level — Displays the distance from the reference clock that is expressed as a numerical value.
• Status — Displays the status of the SNTP server status.
– Up — Denotes that the SNTP server is currently operating normally.
– Down — Denotes that the SNTP server is currently not available.
– Unknown — Denotes that the switch is currently searching for the SNTP server.
– In Process — Denotes when the SNTP server has not fully trusted its own time server.
• Last Response — Displays the date and time of the last time a response was received from the corresponding SNTP server.
• Offset — Displays the estimated offset of the server clock relative to the local clock in milliseconds.
• Delay — Displays the estimated round-trip delay in milliseconds between the server clock and the relative local clock over the network path.
Add Unicast SNTP Server
Step 1. Check the Enable check box in the SNTP Client Unicast field to enable the addition of unicast SNTP server on the switch.
Step 2. Click Apply to save the changes.
Step 3. Click Add to add the unicast SNTP server. A new window appears:
Step 3. Click one of the following radio buttons in the Server Definition field that specifies the method by which the server is identified.
• By IP address — Indicates that the SNTP server is identified by its IP address.
• By name — Indicates that the SNTP server is identified by name from the SNTP server list. If you choose this option, skip to Step 8.
Step 4. Click the desired IP version radio button.
• Version 6 — Denotes the IPv6 address type.
• Version 4 — Denotes the IPv4 address type.
Step 5. (Optional) If the Version 6 IP address type is chosen, click the desired IPv6 address type.
• Link Local — The IPv6 address uniquely identifies hosts on a single network link.
• Global — The IPv6 address is a global unicast that is visible and reachable from other networks.
Step 6. (Optional) If the Link Local IPv6 address type is chosen, choose the link local interface from the Link Local Interface drop-down list.
Step 7. If the Server Definition is chosen as By IP address, enter the IP address of the SNTP server in the SNTP Server IP Address field.
Step 8. If the Server Definition is chosen as By name, choose the name of the SNTP server from the SNTP Server drop-down list. If other is chosen, enter name of SNTP server in the adjacent text-entry field.
Step 9. Check the Enable check box of Poll Interval to enable the switch to obtain system time information from the SNTP server. The NTP servers that are registered for polling are polled, and the clock is selected from the server with the lowest stratum level.