Ip Configuration - AT&T SB67030 System Administrator Manual

AT&T SB67010 Gateway, SB67030 Deskset System Administrator's Guide

IP Configuration

The system defaults to automatically setting the IP address. An Internet Protocol (IP) address is an individual numeric identification
assigned to devices on a computer network. Valid IP addresses enable devices on the network to synchronize with each other
and enable communication.
IP addresses can be assigned in two ways:
Automatically by a DHCP server on the network. This IP address is a dynamic assignment; the address is on lease from
the DHCP server. The lease is renewed as long as the Gateway remains connected and there is no change to the network.
However, if the device is disconnected, or if there is a network or AC power interruption, the lease may not be renewed
(i.e. the IP address expires) and a new IP address may be assigned.
Manually by a System Administrator. This is a static IP address and does not change. If you use a static IP address, you
tie up that address. It cannot be used by other devices.
Using a DHCP-assigned address is highly recommended. If a Deskset cannot find a DHCP server on the network, then it assigns
itself an IP address. This is called a self-assigned link-local address and begins with the number 169 (169.xxx.xxx).
Each Deskset can temporarily assign itself a 169 IP address if the DHCP server is slow to respond to an IP request. However, the
Deskset reverts to the proper IP address if the DHCP server resolves the request.
In the case of a large installation, the DHCP server may take several minutes to respond. This delay may be especially long during
initial installation. If a Deskset continues to use a 169 IP address, then it cannot communicate with other devices on the network.
In this case, there is a problem with IP address assignment that must be resolved by the Network Administrator. It may be
necessary to upgrade your DHCP server equipment to one that can accommodate the required number of SB67010 Gateways,
SB67030 Desksets and PCs connected to your network.
Getting Started 47