Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 1668)

NTP Introduction and Configuration
Software Reference for x310 Series Switches
61.4 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
Troubleshooting
Problem The switch is not assigning the time to devices on the LAN.
Solutions ■ Check that the NTP peer’s IP address is entered correctly.
■ Check that the NTP peer can reach the switch, by pinging the switch from the NTP
peer.
Problem The switch’s clock does not synchronize with the NTP peer.
Solution ■ The switch’s clock can synchronize with the NTP peer only when its initial time is
similar to the NTP peer’s time (after setting the UTC offset). Manually set the switch’s
time so that it is approximately correct, and enable NTP again.
■ Check that the UTC offset is correct.
Problem The switch’s time is incorrect, even though it assigns the correct time to devices on the
LAN.
Solution The UTC offset is probably incorrect, or needs to be adjusted for the beginning or end of
summer time.