NAD Configuring the Aggregate Switches, Configuring the Cisco Catalyst Blade Switch 3020s

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Configuring the Aggregate Switches

Design Guide

RSPAN requires a VLAN to carry the mirrored traffic to the remote destination switch. In the recommended topology, the secondary aggregation switch is the RSPAN destination, where an analysis device, such as the integrated Cisco Network Analysis Module (NAM), resides. The RSPAN VLAN uses the uplink between the blade switch and the secondary aggregation switch. This uplink is blocking under normal conditions for regular VLANs. As a result, bandwidth usage is a concern only when the uplink is forwarding and sharing the path with production traffic.

Configuring the Aggregate Switches

Complete the following steps on the aggregate switches:

Step 1. VLAN configuration

Step 2. RPVST+ configuration

Step 3. Primary and secondary root configuration

Step 4. Configuration of port channels between aggregate switches

Step 5. Configuration of port channels between aggregate switches and Cisco Catalyst Blade Switch 3020s

Step 6. Trunking of port channels between aggregate switches

Step 7. Configuration of default gateway for each VLAN

Note: The “Configuration Details” section describes each of these steps.

Configuring the Cisco Catalyst Blade Switch 3020s

Complete the following steps on the Cisco Catalyst Blade Switch 3020s:

Step 1. VLAN configuration

Step 2. RPVST+ configuration

Step 3. Configuration of port channels between the Cisco Catalyst Blade Switch 3020 and aggregate switches

Step 4. Trunking of port channels between the Cisco Catalyst Blade Switch 3020 and aggregate switches

Step 5. Configuration of server ports on the Cisco Catalyst Blade Switch 3020

Additional Aggregation-Switch Configuration

The following recommendations help integrate the Cisco Catalyst Blade Switch 3020s into the data center:

Step 1. Enable Root Guard on the aggregate-switch links connected to the switches in the blade enclosure.

The spanning-tree topology is calculated, and one of the primary parameters involved in this equation is the location of the root switch. Determining the position of the root switch in the network allows the network administrator to create an optimized forwarding path for traffic. The Root Guard feature is designed to control the location of the root switch.

The aggregation switches should employ the spanning-tree guard root command on the port-channel interfaces connected to the blade switches.

© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.

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Contents Integrating the Cisco Catalyst Blade Switch 3020 for the HP c-ClassBladeSystem into the Cisco Data Center Network ArchitectureContents Introduction HP c-ClassBladeSystem Enclosure OverviewDesign Guide Design Guide Page 5 of Cisco Catalyst Blade Switch 3020 for HPSpanning Tree Cisco Catalyst Blade Switch 3020 FeaturesDesign Guide Traffic Monitoring Design Guide Figure 5. RSPAN Example Link Aggregation ProtocolsData Center Network Components Data Center Network ArchitectureAggregation Layer Access LayerDesign Goals High AvailabilityHigh Availability Design GuideHigh Availability for the Blade Servers Physical Port Count ScalabilityDesign Guide Slot CountOut-of-BandManagement ManagementIn-BandManagement Serial Console PortDesign Guide Network Management Recommendations Design and Implementation DetailsRecommended Topology Primary root switch failure and recovery Configuring the Aggregate Switches Configuring the Cisco Catalyst Blade Switch 3020sAdditional Aggregation-SwitchConfiguration Alternative Topology Configuration Details Configuring the Aggregate SwitchesConfiguring the Cisco Catalyst Blade Switch 3020s VLAN Configuration Port-ChannelConfigurationRPVST+ Configuration Inter-SwitchLink ConfigurationTrunking Configuration Server-PortConfiguration Server Default Gateway Configuration Page 28 of RSPAN Configuration
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