Radwin Ltd. 5XACMOD3C ユーザーズマニュアル
FinM Deployment Guide
Release 4.5.10
3‐3
On‐board Network
Network Guidelines
Figure 3‐1: Typical wayside network arrangement
3.4 On‐board Network
•
Ideally, a Transportation Mobile radio Unit (TMU) is deployed at each end of the train. It
is connected, via a PoE, to the train's internal network (Train network is responsibility of
system integrator). L2 connectivity is required between both TMUs
system integrator). L2 connectivity is required between both TMUs
•
TMUs and train router should be on the same IP subnet
•
Train equipment (APs, CCTV cameras, PIS devices etc.) should be on a different subnet
from that of the TMU
•
All of the train's traffic is sent via an on‐board router (provided by the system integra‐
torI) to the active TMU providing the highest throughput (which TMU is considered
“active” is automatically determined by the system).
“active” is automatically determined by the system).
•
The on‐board train network should support VLANs
•
Network switches should appropriately handle the system's relearning frames. These
frames are VLAN tagged (802.1Q) and switch should forward the relearning traffic and
update the FIB (Forwarding Information Base)
update the FIB (Forwarding Information Base)
•
IEEE802.3az should be disabled on all switches
•
Spanning tree between train and trackside is not supported and must be disabled on
switch ports connected to the RADWIN radios.