AASTRA SIP-DECT (Release 3.0)- OM System Manual - Installation, Administration and Maintenance EN - Manual (Page 165)

SIP–DECT OM System Manual Release 3.0 9 Configuration und Administration Aspects
Aastra depl-1624/1.0 Page: 165 (241)
9.5.3.1.3 Retries
If the DHCP client does not get an appropriate DHCP offer, a new DHCP request is send
after 1 second. After 3 DHCP requests are sent the DHCP client will sleep for 60 seconds.
During this time the booter will accept a local configuration with the OM Configurator.
This cycle will repeat every 3 minutes until either all the required DHCP options are provided
or the system is manually configured using the OM Configurator tool.
9.5.3.2 TFTP Client
The TFTP client will download the application image from the TFTP server. Both TFTP
server and the name of the application image are supplied via the DHCP client. The
application image is checksum protected.
Downloading the application image via TFTP is mandatory for older RFPs only. Current
RFPs will load the application image from the internal flash, and (if configured) also
download the application image via TFTP for update.
9.5.3.3 Booter Update
With older RFPs each application SW comes with the latest released booter SW. The
application SW will update the booter automatically. With current RFPs, the booter will only
be updated if you update the SW.
If you downgrade the RFP’s application SW to an older release, the booter will not
downgrade automatically. Also, if you want to use the OM Configurator tool (see 9.7), the OM
Configurator tools version need to match the booter software version.
9.5.4 Application Startup
After successfully starting the application software, the RFP checks the local network
settings in its internal flash. If no settings are available or if they are disabled, it starts a
DHCP client to determine the IP address of the OMM and other application startup settings.
9.5.4.1 DHCP Client
The DHCP client is capable of receiving broadcast and unicast DHCP replies. Therefore the
flags field is
0x0000 . The DHCP request contains the well-known magic cookie
(0x63825363) and the end option (0xFF) .
Parameters
The following parameters will be supported within this step:
Option / Field Meaning Mandatory
yiaddr IP address of the IP-RFP yes
siaddr Parameter named “Boot Server Host Name” with value
as the IP address of the TFTP server no (current
RFPs)
yes (older
RFPs)