Wayside Core Router; Basic Ip Scheme And Data Flow Path - Radwin Transportation FiberinMotion Deployment Manual

Wayside Core Router
3.6 Wayside Core Router
The wayside network requires a core router that will act as the gateway between the Train‐
To‐Ground system and the client's core network. All traffic between any train's on‐board
devices and the client's core network must pass through this router. The wayside core router
must have at least 2 interfaces (see diagram below in Section 3.7):
Interface 1: Connects to the client's core network. It will be on the same subnet as the
client's network and will be the gateway for all traffic from the client network
targeted at devices on board trains.
Interface 2: Used for the Train‐To‐Ground network. It will be on the same subnet as the on‐
board router interface 1 and will be the gateway for all traffic from the on‐
board routers on all the trains.
All traffic between any on‐board device and the trackside must pass through the on‐board
router.
3.7 Basic IP Scheme and Data Flow Path
An example of the basic IP scheme is shown here.
The traffic flows between the wayside core router and the on‐board router. All elements
between the routers (including switches and FiberinMotion radios) are pure L2 devices. They
have an IP address for management only, and are transparent to the data traffic.
Overall, at least 3 IP subnets are required:
• Subnet A for the client core network.
• Subnet B for the train to ground segment.
• Subnet C for the on‐board network.
If working with a VLAN, see Recommended VLAN Assignment on page 3‐7.
FinM Deployment Guide
Network Guidelines
Release 4.5.10 3‐5