Nortel CS 1000 Manual page 25

Fixed IP network addresses
You must provision fixed IP addresses for the following servers:
•
The TFTP server stores the configuration file and the firmware that are
available to the DAPs. After a DAP starts up, the DHCP server sends
the DAP the IP address of the TFTP server. The DAP then downloads
the configuration files from the TFTP server. The TFTP server often
runs on the DAP controller or manager PC.
•
The DHCP server (optional) sends the address of the DNS server to
the DAP. The DAP does not support Domain Name Resolution.
•
The DAP controller or manager requires a fixed IP address. The DAPs
retrieve this fixed IP address from the configuration file that the DAP
loads from the TFTP server.
•
The IP address of the PABX is reachable either through a router or
directly.
The PABX is sometimes referred to as Gatekeeper or SIP proxy,
depending on the type of PABX that is used.
To facilitate network management, Nortel recommends that fixed IP
addresses are also assigned by the DHCP server. Ensure that the DHCP
server has the hardware MAC addresses of all servers to issue the proper
(fixed) IP addresses to each individual server.
The DAP IP address can be stored in flash memory. If the IP address is
stored, the DHCP server is needed only for the first startup. Then an IP
address is assigned to the DAP.
Dynamic IP network addresses
Network stations, which are not servers (PC workstations and DAPs), can
use dynamic IP addresses assigned by DHCP. For dynamic IP addresses,
you need not specify the MAC addresses of all the network stations in the
DHCP server.
Ensure that you configure the DHCP server to assign IP addresses from
a specific range to unknown MAC addresses. However, unknown LAN
stations have valid IP addresses, which can be a minor network security
issue. To solve this, use the Vendor Class Identification (VCI) in the DHCP
server. The DHCP server issues IP addresses only to devices that have
the DAP VCI. Ensure that the DHCP server can make a distinction in VCIs.
The DAP VCI is D(ECT)AP 49.
ATTENTION
For SIPN configurations, ensure that a static IP address is issued to the DAP
selected as the DAP Redirect Server. For more information, see
Gateway Endpoint for DAP redirect server" (page
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 02.02 30 March 2010
Copyright © 2008-2010 Nortel Networks. All Rights Reserved.
Deployment requirements 25
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