LBI-38962
12
NETWORK PLANNING FOR RDI HOST CONFIGURATIONS
RDI hosts communicate directly to the EDG, through an HDI board, over 9600 baud asynchronous serial data
links using the RDI protocol.
Host A
HDI
Host B
RDI Host Network
Internal EDG Network
TSI
EDACS Network
EDG
Radio/RDI/RDT
Radio/RDI/RDT
Radio/RDI/RDT
CAP
An
internet with RDI hosts
RDI hosts use EDACS addresses, rather than IP addresses, as a means of specifying the source and destination
for all data messages. Although the EDG still requires IP network addresses to be assigned to each of the three
networks, these addresses do not have to be explicitly assigned by the user. In fact, the user need not know
anything about IP addressing in order to set up a system that uses only RDI hosts. The EDG will assign default
IP addresses to all networks
1
, hosts, and radios.
The user still has the job of assigning EDACS Host IDs to every individual RDI host in the system (as well as
assigning Unit IDs and Group IDs to the radios). Each RDI host must be assigned a single Host ID, and may be
assigned multiple Host IDs if desired.
A host may be connected to one or more ports on a single HDI, or multiple HDIs. Also, up to four separate hosts
may be connected to a single HDI.
1
The current version of the EDG still requires that a CAP external address be specified, even if not being connected to an
external IP network. This may be any valid IP address with a network ID that does not match that of any other network
directly connected to the EDG (i.e. RDI host network, internal EDG network, EDACS network).