Operation Manual

Startup
A31003-D3000-M100-02-76A9, 11-2013
26 OpenScape Desk Phone IP V3R3, Phone Administration, Administrator Documentation
Quick Start
2.3.4 DHCP Resilience
Prerequisites
• It is possible to sustain network connectivity in case of DHCP server failure. If
DHCP lease reuse is activated, the phone will keep its DHCP-based IP
address even if the lease expires. To prevent address conflicts, the phone will
send ARP requests in 5 second intervals. Additionally, it will send discovery
messages periodically to obtain a new DHCP lease.
Step by Step
› In the left column, select Network > IPv4 configuration to open the "System
Identity" dialog. Select the check box to enable DHCP lease reuse.
Related Topics
Related Topics
•
Quick Start
2.3.5 Date and Time / SNTP
An SNTP (Simple Network Time Protocol) server provides the current date and
time for network clients. The IP address of an SNTP server can be given by
DHCP.
In order to provide the correct time, it is required to give the time zone offset, i.e.
the shift in hours to be added to the UTC time provided by the SNTP server.
The following DHCP options are required:
• SNTP IP Address (option #42 "NTP Servers"): IP Address or hostname of the
SNTP server to be used by the phone.
• Time zone offset (option #2 "Time Offset"): Offset in seconds in relationship
to the UTC time provided by the SNTP server.
For manual configuration of date and time see
3.5.5 Date and Time.