Cisco 2950 - Catalyst Switch Configuration Manual page 46

Network Configuration Examples
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Redundant Gigabit backbone—Using HSRP, you can create backup paths between
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Catalyst 3550-12T-L3 switches. To enhance network reliability and load balancing for different
VLANs and subnets, you can connect the Catalyst 2950 switches, again in a star configuration, to
two backbone switches. If one of the backbone switches fails, the second backbone switch preserves
connectivity between the switches and network resources.
Figure 1-1
Cost-Effective
Wiring Closet
High-Performance
Workgroup
Redundant Gigabit
Backbone
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
1-12
GigaStack GBIC module for creating a 1-Gbps stack configuration of up to nine supported
switches. The GigaStack GBIC supports one full-duplex link (in a point-to-point configuration)
or up to nine half-duplex links (in a stack configuration) to other Gigabit Ethernet devices.
Using the required Cisco proprietary signaling and cabling, the GigaStack GBIC-to-GigaStack
GBIC connection cannot exceed 3 feet (1 meter).
SFP modules: fiber and copper connections of up to 32,808 feet (10 kilometers) (supported only
on the Catalyst 2950 LRE switches)
Example Configurations
Catalyst 2950 switch
Catalyst 3550-12T or
Catalyst 3550-12G switch
Catalyst 2900 XL, Catalyst 2950, Catalyst 2955,
Catalyst 3500 XL, and Catalyst 3550 cluster
Catalyst 3550-12T or
Catalyst 3550-12G switch
1-Gbps HSRP
Si
Catalyst 2900 XL, Catalyst 2950, Catalyst 2955,
Catalyst 3500 XL, and Catalyst 3550 cluster
Catalyst 2900 XL,
Catalyst 2950,
Catalyst 3500 XL,
and Catalyst 3550
GigaStack cluster
Gigabit
Si
server
Catalyst 3550-12T or
Catalyst 3550-12G switch
Si
Chapter 1 Overview
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