User Manual

Glossary
187
11.7 Appendix E: Description of Mobile Gateway System Ethernet
Connectivity
11.7.1 IP Address Assignment Methodology
The Mobile Gateway System uses DHCP as a method of distributing an IP address for
each of the individual components in the system. The Gateway Server acts as the DHCP
Server. The Gateway Router, Mobile-MMR, PDA Clients, and the TeraHop Console
Computer all act as DHCP Clients. No configuration is required to set IP address for any
of the Mobile Gateway System Components. Configuration of Access Point SSID,
however, is necessary for wirelessly connected components.
Each Gateway Server is assigned an Area ID by TeraHop Networks. This Area ID is
unique to each Gateway Server and may not be changed. The Area ID provides the basis
for all IP addresses and SSID in the Mobile Gateways System. IP address follow the
following format: 10.A1.A2.x where A1 is the upper byte of the Area ID, A2 is the lower
byte of the Area ID, and x is the unique integer assigned by the DHCP server to each
component. For Example, if the Gateway Servers Area ID is 5 the IP Address of the
system would be 10.0.5.x. If the Gateway Servers Area ID is 1234 the IP Addresses of
the system would be 10.4.210.x.