DOCUMENT:Q178538  21-MAR-1999  [exchange]
TITLE   :Configuring DRAS with Reserved IP Address for Private Networks
PRODUCT :Microsoft Exchange
PROD/VER:WINDOWS:4.0,5.0,5.5
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
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SUMMARY
=======

Per RFC 1597: Section 3: Private Address Space, The Internet Assigned Numbers
Authority (IANA) has reserved the following three blocks of the IP address space
for private networks: 10.0.0.0 - 10.255.255.255 , 172.16.0.0 - 172.31.255.255,
and 192.168.0.0 - 192.168.255.254.

These network IDs and the associated IP addresses may be used freely in any
internal network scheme and will not affect interoperability with the Internet
as a whole. In particular, the class C range is the preferred range to use when
configuring the async connectors of Microsoft Exchange Server.

MORE INFORMATION
================

Each async interface on a Windows NT Server computer requires two (2) ip
address; one for the server and one for the client of the particular session.
The network ID of the async interface should be such that the async interface is
on a different subnet than the network interface of the server; as such the unit
is multihomed. Using a subnet mask of 255 in the third octet of the class C
address allows 255 networks with 254 hosts on each network; this facilitates
ease of planning and configuration.

For example, connect 3 Exchange sites through the Dynamic Remote Access Service
(RAS) connector. Each Exchange Server computer has a single modem.

1. In the RAS configuration, select a static pool of addresses.

2. Configure the pools on each server as follows.

      Server_1 192.168.1.1 and 198.168.1.2;
      Server_2 192.168.2.1 and 192.168.2.2
      Server_3 192.168.3.1 and 192.168.3.2.

Thus the RAS server session on each server will get the .1 address and the client
session will be assigned the .2 address.

Additional query words: IP XFOR XCON TCP NT STACK ADDRESS TSHOOT

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Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2
Version           : WINDOWS:4.0,5.0,5.5
Hardware          : ALPHA x86
Issue type        : kbinfo

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