Using IP Office Manager, retrieve the configuration from the system.
Select System
Select the LAN1 or LAN2 tab depending on which of the system's LAN interfaces you want to use to support H.323 extensions.
Select the LAN Settings tab
In Number of DHCP IP Addresses, set the value for the number of IP addresses the system can issue.
Under DHCP Mode select Server.
Click Advanced. The Advanced settings allow adjustment of the DHCP setting including adding multiple ranges of DHCP numbers that the IP Office system can support. Note that address ranges outside those of the system's own subnet may also require the creation of appropriate IP routes to ensure traffic routing between the subnets.
Note:
Changes to the DHCP pools do not require a reboot of the IP Office system. However, it causes a reboot of Avaya H323 and SIP telephones connected to the system. Non-Avaya IP phones are not rebooted but may need to be manually restarted in order to obtain a valid address from the new pools configuration.
Select Apply to Avaya IP Phone Only checkbox.
The IP Office acts as a DHCP server for Avaya phones only. This option cannot be used if also supporting 1100 Series and 1200 Series phones.
