Cisco IE-3000-8TC Software Configuration Manual page 55

Chapter 1 Overview
Figure 1-3
Human
Machine
Interface
Controllers
Cell Network—Redundant-Star Topology
In a redundant-star topology, every Layer 2 access switch has dual connections to a Layer 3 distribution
switch. Devices are connected to the Layer2 switches. See
•
•
•
OL-13018-03
Cell Network–Ring Topology
Catalyst 3750
Stackwise
Switch
Stack
(HMI)
IE
3000
Controllers, Drives,
Cell Zone and Remote I/O
Any Layer 2 switch is always only two hops to another Layer 2 switch.
In the Layer 2 network, each switch has dual connections to the Layer 3 devices.
The Layer 2 network is maintained even if multiple connections are lost.
Network Configuration Examples
Figure 1-4.
Cisco IE 3000 Switch Software Configuration Guide
1-19