CLI Reference Guide-R07

Chapter 1 | Initial Switch Configuration
Setting the System Clock
– 66 –
#option 66, 67
option space dynamicProvision code width 1 length 1 hash size 2;
option dynamicProvision.tftp-server-name code 66 = text;
option dynamicProvision.bootfile-name code 67 = text;
subnet 192.168.255.0 netmask 255.255.255.0 {
range 192.168.255.160 192.168.255.200;
option routers 192.168.255.101;
option tftp-server-name "192.168.255.100"; #Default Option 66
option bootfile-name "bootfile"; #Default Option 67
}
class "Option66,67_1" { #DHCP Option 60 Vendor class
two
match if option vendor-class-identifier = "ecs2100-28t.cfg";
option tftp-server-name "192.168.255.101";
option bootfile-name "test";
}
Note: Use “ecs2100-28t.cfg” for the vendor-class-identifier in the dhcpd.conf file.
Setting the System Clock
Simple Network Time Protocol (SNTP) or Network Time Protocol (NTP) can be used
to set the switch’s internal clock based on periodic updates from a time server.
Maintaining an accurate time on the switch enables the system log to record
meaningful dates and times for event entries. You can also manually set the clock. If
the clock is not set manually or via SNTP or NTP, the switch will only record the time
from the factory default set at the last bootup.
Caution: It is strongly advised to use SNTP or NTP to maintain an accurate record
of switch events. Manually setting the system clock can result in an inaccurate time-
stamp on system events.
When the SNTP client is enabled, the switch periodically sends a request for a time
update to a configured time server. You can configure up to three time server IP
addresses. The switch will attempt to poll each server in the configured sequence.
The switch also supports the following time settings:
◆ Time Zone – You can specify the offset from Coordinated Universal Time (UTC),
also known as Greenwich Mean Time (GMT).
◆ Summer Time/Daylight Saving Time (DST) – In some regions, the time shifts by
one hour in the fall and spring. The switch supports manual entry for one-time
or recurring clock shifts.