Cisco Systems 3560-X, 3750-X manual Data Stack Bandwidth and Partitioning Examples

Chapter 2 Switch Installation

Data Stack Cabling Configurations

Figure 2-3shows a recommended configuration when the switches are mounted side-by-side. Use the 1-meter and the 3-meter StackWise cables to connect the switches. This configuration provides redundant connections.

Figure 2-3 Data Stacking up to Eight Switches in a Side-by-Side Mounting

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Data Stack Bandwidth and Partitioning Examples

This section provides examples of data stack bandwidth and possible data stack partitioning.

Figure 2-4shows a data stack of Catalyst 3750-X switches that provides full bandwidth and redundant StackWise cable connections.

Figure 2-4 Example of a Data Stack with Full Bandwidth Connections

STACK 1 STACK 2

1

2

STACK 1

STACK 1

STACK 2

STACK 2

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Figure 2-5shows an example of a stack of Catalyst 3750-X switches with incomplete StackWise cabling connections. This stack provides only half bandwidth and does not have redundant connections.

Figure 2-5

STACK 1	STACK 2
1 STACK 1	STACK 2
STACK 1	STACK 2

2

Example of a Data Stack with Half Bandwidth Connections

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Figure 2-6and Figure 2-7show data stacks of Catalyst 3750-X switches with failover conditions. In Figure 2-6, the StackWise cable is bad in link 2. Therefore, this stack provides only half bandwidth and does not have redundant connections. In Figure 2-7, link 2 is bad. Therefore, this stack partitions into two stacks, and the top and bottom switches become stack masters.

Figure 2-6 Example of a Data Stack with a Failover Condition

1

2

STACK 1

STACK 1

STACK 1

STACK 2
STACK 2
STACK 2	3

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Catalyst 3750-X and 3560-X Switch Hardware Installation Guide

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