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Cisco IE 3000 Switch Software Configuration Guide
OL-13018-03
Chapter 1 Overview
Network Configuration Examples
Figure 1-2 Cell Network–Trunk-Drop Topology
Cell Network—Ring Topology
A ring topology is similar to a trunk-drop topology except that the last switch in the chain is connected
to the Layer 3 switch that forms a network ring. If a connection is lost in a ring, each switch maintains
connectivity to the other switches. See
Figure 1-3.
• The network can only recover from the loss of a single connection.
• It is more difficult to implement because it requires additional protocol implementation and Rapid
Spanning Tree Protocol (RSTP).
• Although better than the trunk-drop, the top of the ring (connections to the Layer 3 switches) can
become a bottleneck and is susceptible to oversubscription, which can degrade network
performance.
204319
Human
Machine
Interface
(HMI)
IE
3000
Controllers
Cell Zone
Catalyst 3750
Stackwise
Switch
Stack
Controllers, Drives,
and Remote I/Os
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