Avaya Communication Manager IP DECT, Installation, Administration And Maintenance Manual

Page: 27 / 128

Avaya IP DECT system start up
Issue 1 August 2006 27
●
TFTP server mandatory
●
Public Option 224: "OpenMobility” mandatory
●
Public Option 225: VLAN ID optional
Note:
Note:
If local configuration via OM Configurator is set, these information will be read
from internal flash memory instead.
DHCP REQUEST
Vendor class identifier (code 60)
The DHCP client sends the vendor class identifier " OpenMobility ”.
Parameter request list (code 55)
The DHCP client in the booter requests the following options in the parameter request list:
●
Subnet mask option (code 1)
●
Router option (code 3)
●
Public option 224 (code 224)
●
Public option 225 (code 225)
●
Public option 226 (code 226)
DHCP OFFER
Mandatory options
The DHCP client selects the DHCP server according to the following rules:
●
One of the public options ( code 224 up to code 254 ) has a value equal to the string
" OpenMobility ”. It is recommended to use public option 224 for this, because the DHCP
client in the application checks for this option.
OR
●
the file field in the DHCP message has a sub string equal to "ip_rfp.cnt”
If none of the two rules above match the DHCP offer is ignored.
Information retrieved from the DHCP OFFER:
●
the IP address to use is taken from the yiaddr field in the DHCP message
●
the IP netmask is taken from the subnet mask option (code 1)
●
the default gateway is taken from the router option (code 3)