Bay Technical Associates RM356 Manual De Usuario

Reference Guide for the Model RM356 Modem Router

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Introduction

Regardless of your particular situation, do not create an arbitrary IP address; always follow the 
guidelines explained here. For more information about address assignment, refer to RFC 1597, 
Address Allocation for Private Internets, and RFC 1466, Guidelines for Management of IP 
Address Space.

If multiple stations on a LAN need to access the Internet simultaneously, they usually have to 
obtain a range of IP addresses from the ISP. This type of Internet account is much more costly than 
a single-address account typically used by a single user with a terminal adapter rather than a router. 
The  Model RM356 Modem Router employs a method called extended NAT. This method allows 
an entire department of networked PCs to share an Internet account using only a single IP address, 
which may be statically or dynamically assigned by your ISP.

The router accomplishes this address sharing by translating the internal LAN IP addresses to a 
single address that is globally unique on the Internet. The internal LAN IP addresses can be either 
private addresses or registered addresses. For more information about IP address translation, refer 
to RFC 1631, The IP Network Address Translator (NAT).

 illustrates a single IP address operation.

 

7786EA

192.168.0.2

192.168.0.3

192.168.0.4

192.168.0.5

192.168.0.1

172.21.15.105

Private IP addresses
assigned by user

Internet

IP addresses
assigned by ISP