Cisco Systems 3750E manual Linux Server Cluster

Chapter 1 Overview

Network Configuration Examples

Figure 1-6 Linux Server Cluster

	Catalyst 3750-E-only
Redundant SFP	StackWise Plus
	switch stack
module uplinks

		Linux cluster
Campus	EtherChannel	parallel-
		processing
	across uplinks
core		server farm
		32-Gbps ring

Catalyst 3750-E-only

StackWise Plus

switch stack

200858

Small to Medium-Sized Network Using Catalyst 3750-E and 3560-E Switches

Figure 1-7and Figure 1-8show a configuration for a network of up to 500 employees. This network uses

aCatalyst 3750-E-only Layer 3 switch stack or Catalyst 3560-E Layer 3 switches with high-speed connections to two routers. For network reliability and load-balancing, this network has HSRP enabled on the routers and on the switches. This ensures connectivity to the Internet, WAN, and mission-critical network resources in case one of the routers or switches fails. The switches are using routed uplinks for faster failover. They are also configured with equal-cost routing for load sharing and redundancy. (When the network uses Catalyst 3750-E switches, a Layer 2 switch stack can use cross-stack EtherChannel for load sharing.)

The switches are connected to workstations, and local servers, and IEEE 802.3af compliant and noncompliant powered devices (such as Cisco IP Phones). The server farm includes a call-processing server running Cisco CallManager software. Cisco CallManager controls call processing, routing, and Cisco IP Phone features and configuration. The switches are interconnected through Gigabit interfaces.

This network uses VLANs to logically segment the network into well-defined broadcast groups and for security management. Data and multimedia traffic are configured on the same VLAN. Voice traffic from the Cisco IP Phones are configured on separate VVIDs. If data, multimedia, and voice traffic are assigned to the same VLAN, only one VLAN can be configured per wiring closet.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

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