Allied Telesis AT-S63 - Manual (Page 30)

Chapter 1: Overview
30 Section I: Basic Operations
Stack Topology
The switches of a stack are cabled with the AT-StackXG Stacking Module
and its two full-duplex, 12-Gbps stacking ports. There are two supported
topologies. The first topology is the duplex-chain topology, where a port on
one stacking module is connected to a port on the stacking module in the
next switch, which is connected to the next switch, and so on. The
connections must crossover to different numbered ports on the modules.
Port 1 on the stacking module in one switch must be connected to Port 2
on the stacking module in the next switch. An example of this topology of a
stack of four switches is illustrated in Figure 2.
Figure 2. Duplex-chain Topology
The second topology, the duplex-ring topology, is identical to the daisy-
chain, except that the stacking module in the switch at the top of the stack
is connected to the stacking module in the switch at the bottom of the
stack to form a physical loop. An example of this topology is shown in
Figure 3.
RPS INPUT
AT-StackXG
STACK PORT 1 STACK PORT 2
RPS INPUT
AT-StackXG
STACK PORT 1 STACK PORT 2
RPS INPUT
AT-StackXG
STACK PORT 1 STACK PORT 2
RPS INPUT
AT-StackXG
STACK PORT 1 STACK PORT 2
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