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142 Configuring and managing IP interfaces and services
NN47250-500 (320657-F Version 02.01)
Displaying the time and date
To display the time and date, use the following command:
show timedate
WSS# show timedate
Sun Feb 29 2004, 23:58:02 PST
Configuring and managing NTP
The Network Time Protocol (NTP) allows a networking device to synchronize its system time and date with
the time and date on an NTP server. When used on multiple devices, NTP ensures that the time and date are
consistent among those devices.
The NTP implementation in WSS Software is based on RFC 1305, Network Time Protocol (Version 3) Specifi-
cation, Implementation and Analysis.
You can configure a WSS to consult up to three NTP servers. The switch compares the results from the servers
and selects the best response. (For information, see RFC 1305.)
After you enable the NTP client and configure NTP servers, WSS Software queries the NTP servers for an
update every 64 seconds and waits 15 seconds for a reply. If the switch does not receive a reply to an NTP
query within 15 seconds, the switch tries again up to 16 times. You can change the update interval but not the
timeout or number of retries.
WSS Software adjusts the NTP reply according to the following time parameters configured on the WSS:
• Offset from UTC (configured with the timezone command; see “Setting the time zone” (page 139))
• Daylight savings time (configured with the set summertime command; see “Configuring the
summertime period” (page 140))
The NTP client is disabled by default.
Adding an NTP server
To add an NTP server to the list of NTP servers, use the following command:
set ntp server ip-addr
To configure a WSS to use NTP server 192.168.1.5, type the following command:
WSS# set ntp server 192.168.1.5
Note. If NTP is configured on a system whose current time differs from the NTP server
time by more than 10 minutes, convergence of the WSS time may take many NTP update
intervals. Nortel recommends that you set the time manually to the NTP server time before
enabling NTP to avoid a significant delay in convergence.