Chapter 1      Overview
Network Configuration Examples
1-18
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Large Campus Configuration
Figure 1-4 shows a configuration for a network of more than 1000 users. Because 
it can aggregate up to 130 Gigabit connections, a Catalyst 6500 multilayer switch 
is used as the backbone switch.
You can use the workgroup configurations shown in previous examples to create 
workgroups with Gigabit uplinks to the Catalyst 6500 switch. For example, you 
can use switch clusters that have a mix of Catalyst 2900 XL and 
Catalyst 3500 XL switches.
The Catalyst 6500 switch provides the workgroups with Gigabit access to core 
resources:
• Cisco 7000 series router for access to the WAN and the Internet.
• Server farm that includes a call-processing server running Cisco CallManager 
software. Cisco CallManager controls call processing, routing, and IP phone 
features and configuration.
• Cisco Access gateway (such as Cisco Access Digital Trunk Gateway or Cisco 
Access Analog Trunk Gateway) that connects the IP network to the PSTN or 
to users in an IP telephony network.