Standard Ip Configuration - 3Com 3C10111C - NBX 100 - Modular Exp Base Installation Manual

Standard IP The NBX system must be configured differently in each of the following
Configuration situations:
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Using DHCP
A DHCP server can assign IP addresses to telephones from a predefined
group of addresses. (The NCP must have a static IP address.) It assigns
these addresses for a fixed amount of time that depends on how the
DHCP server is configured. At the end of the time period, if the device is
still active and needs the IP address to continue operating, the DHCP
server renews the same IP address for another time period. If the device is
no longer active at the end of the time period, the DHCP server returns
the IP address to the list of available addresses that can be allocated to
requesting devices.
If your DHCP server can serve multiple subnetworks (by using a BOOTP
Relay agent, also known as an IP helper address), you can provide IP
settings (IP address, subnet mask, and default gateway address) for all of
your system devices. However, each NBX device in the system requires the
IP address of the NCP. If the device and the NCP are located on the same
subnetwork, the device receives this information through status messages
passed at the Ethernet layer. If the device and the NCP are located on
different subnets, you can configure the DHCP server to pass the IP
address of the NCP to the device. See
Devices"
All telephones and devices are on the same subnetwork as the Call
Processor.
If you use Standard IP with a DHCP server, verify that the server has
enough IP addresses to handle the number of telephones and devices
in the NBX system.
If you are not using a DHCP server, use the NBX NetSet utility to
configure an IP address for each 3Com telephone and device.
Some telephones are on separate subnetworks.
If you use a DHCP server, verify that the server has enough IP
addresses to handle the number of telephones and devices on the
separate subnetwork. If you connect a new telephone to the
subnetwork, you must provide a means for the telephone to get the IP
address of the NCP. You can configure DHCP option 184 on your
DHCP server for this purpose. Alternatively you can use the
telephone's Local User Interface (LUI) utility to program the NCP
address in into each telephone.
on page 154.
IP Telephony Overview
"Providing the NCP IP Address to
153