5-14
Configuring IP Addressing, Time Synchronization, Interface Access, and System Information
Time Synchronization Protocol Options
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Time Synchronization Protocol Options
TimeP Time Synchronization
You can either manually assign the switch to use a TimeP server or use DHCP
to assign the TimeP server. In either case, the switch can get its time synchro-
nization updates from only one, designated Timep server. This option
enhances security by specifying which time server to use.
SNTP Time Synchronization
SNTP (Simple Network Time Protocol) provides two operating modes:
■
Broadcast Mode:
The switch acquires time updates by accepting the
time value from the first SNTP time broadcast detected. (In this case,
the SNTP server must be configured to broadcast time updates to the
network broadcast address. Refer to the documentation provided
with your SNTP server application.) Once the switch detects a partic-
ular server, it ignores time broadcasts from other SNTP servers unless
the configurable
Poll Interval
expires three consecutive times without
an update received from the first-detected server.
N o t e
To use Broadcast mode, the switch and the SNTP server must be in the same
subnet.
■
Unicast Mode:
The switch requests a time update from the config-
ured SNTP server. (You can configure one server using the menu
interface, or up to three servers using the CLI
sntp server
command.)
This option provides increased security over the Broadcast mode by
specifying which time server to use instead of using the first one
detected through a broadcast.