adept technology GadgetGateway, Руководство пользователя

Страница: 16 / 124

2.1 Introduction
2-6
GadgetGateway Overview
Note: Echelon’s LNS based VNI interface (LonMaker
TM
) only works in Normal mode. In
order for a GadgetGateway to communicate directly over an IP channel to VNI interface
requires that the GadgetGateway be in Normal mode.
2.1.3 Uses for the GadgetGateway
The interfaces described here provide the management necessary for the ANSI/EIA 852 to
tunnel ANSI/EIA 709.1 packets successfully over IP. This ability provides wide area net-
work (WAN) support to ANSI/EIA 709.1 networks.
Furthermore, since the IP networks can support much higher traffic capacity, GadgetGate-
ways can also be used to aggregate ANSI/EIA 709.1 traffic in traffic volumes higher than
in normal ANSI/EIA 709.1 networks. The ability to aggregate larger ANSI/EIA 709.1
traffic volumes allows GadgetGateway and other 709.1 to IP gateways to be used as net-
work backbones for 709.1 networks.
Finally, 709.1 to IP gateways may be connected to specialized IP applications instead of to
other gateways. Connecting an IP application to a GadgetGateway provides these special-
ized applications with roaming capabilities which would be difficult if these applications
were required to be directly connected to the 709.1 network (e.g., GadgetAnalyzer, Lon-
Maker-3, etc.). An example of how several GadgetGateway routers can be interconnected
to support an IP backbone for several LON networks is show in Figure 2.5.
The GadgetGateway router uses one of two forms of IP addressing. Uni-cast and Multi-
cast. The multi-cast currently only works when in manual mode. The advantage of multi-
FIGURE 2.5 GadgetGateway routers for IP backbone of LON Network.