12.1.4 Symmetric connection

(1) Connection type

The Switch connects symmetrically in active/passive mode to IP addressed unit specified by the configuration command ntp peer. It is not synchronized with the time of symmetric requestreceived from an unset IP.

Even if the host NTP server is disconnected, the system's time is synchronized by going through the symmetrically connected NTP server.

(2) Authentication

The following tables show the authentication keys that are assigned to NTP messages sent and received by the Switch to and from symmetric-connected devices.

Table 12-5: Authentication keys used when the Switch operates as a NTP client-

Connection mode of this equipment	Transmission from the Switch	Reception by the Switch
Symmetric connection	Authentication key specified in key parameter of the configuration command ntp peer *	Any authentication key (authentication key set in the Switch configuration)