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Cisco Nexus 1000V Deployment Guide

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Deployment Guide

Cisco Nexus 1000V Series Switches Deployment Guide

2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.

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Deployment Guide

ContentsOverview....................................................................................................................................................................... 4 Audience....................................................................................................................................................................... 4 Introduction.................................................................................................................................................................. 4

Cisco Nexus 1000V Series Components .................................................................................... 4 Network Policy ........................................................................................................................... 5Cisco Nexus 1000V Series Theory of Operation ....................................................................................................... 5

VMware Networking Overview.................................................................................................. 5 System Overview ........................................................................................................................ 7 Virtual Chassis ........................................................................................................................ 7 Network Policy Management ................................................................................................. 7 Policy Mobility ................................................................................................................... 8 Installation............................................................................................................................... 8 Virtual Supervisor Module ......................................................................................................... 8 Cisco NX-OS Software........................................................................................................... 9 VSM Networking.................................................................................................................... 9 Control Interface ............................................................................................................... 10 Management Interface....................................................................................................... 10 Packet Interface................................................................................................................. 11 Communication Between VSM and VMware vCenter......................................................... 11 Cisco Nexus 1000V Series VMware vCenter Server Extension ...................................... 11 Opaque Data...................................................................................................................... 12 Virtual Ethernet Module ........................................................................................................... 12 Switch Port Interfaces ........................................................................................................... 13 Switch Forwarding................................................................................................................ 13 MAC Address Learning .................................................................................................... 14 Loop Prevention................................................................................................................ 14 VEM-VSM Communication................................................................................................. 14 Domain ID ........................................................................................................................ 15 Packet Interface Communication ...................................................................................... 15 Port Profiles .............................................................................................................................. 15 Live Policy Changes ............................................................................................................. 16 Uplink Profiles ...................................................................................................................... 16 System VLANs ................................................................................................................. 16Cisco Nexus 1000V Series Network Design............................................................................................................ 17

Network Design Considerations ............................................................................................... 17 Design Goals......................................................................................................................... 17 Traffic Classification ............................................................................................................ 17 VLAN Consistency............................................................................................................... 18 Traffic Separation ............................................................................................................. 18 Upstream Switch Connectivity ............................................................................................. 18 Individual Uplinks ............................................................................................................ 18 PortChannels ..................................................................................................................... 19 Virtual Port Channel Host Mode ...................................................................................... 19 Load Balancing ................................................................................................................. 19 Source-Based Hashing ...................................................................................................... 20 Flow-Based Hashing......................................................................................................... 20 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 2 of 25

Deployment Guide

Control Interface Prioritization ......................................................................................... 20 Spanning Tree Protocol..................................................................................................... 20 VSM Design.......................................................................................................................... 20 Virtual Machine Design .................................................................................................... 21 Adjacency ......................................................................................................................... 21 Latency.............................................................................................................................. 21 Traditional Cisco Network........................................................................................................ 21 Two-NIC Design Examples .................................................................................................. 21 Four-NIC Design Examples.................................................................................................. 22 Single-PortChannel Alternative ........................................................................................ 23 Six-NIC Design Examples.................................................................................................... 24For More Information................................................................................................................................................. 25

2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.

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Deployment Guide

OverviewThis document provides design and configuration guidance for deploying the Cisco Nexus 1000V Series Switches with VMware vSphere 4.0. For detailed configuration documentation, please refer to the respective Cisco and VMware product configuration guides. Links to the product configuration guides can be found in the For More Information section of this document.

AudienceThis document is intended for network architects, network engineers, virtualization administrators, and server administrators interested in understanding and deploying VMware vSphere 4.0 hosts in a Cisco data center environment.

IntroductionCisco Nexus 1000V Series Switches are virtual machine access switches that are an intelligent software switch implementation for VMware vSphere environments running the Cisco NX-OS Software operating system. Operating inside the VMware ESX hypervisor, the Cisco Nexus 1000V Series supports Cisco VN-Link server virtualization technology to provide:

Policy-based virtual machine connectivity Mobile virtual machine security and network policy Nondisruptive operational model for your server virtualization, and networking teams

When server virtualization is deployed in the data center, virtual servers typically are not managed the same way as physical servers. Server virtualization is treated as a special deployment, leading to longer deployment time, with a greater degree of coordination among server, network, storage, and security administrators. With the Cisco Nexus 1000V Series, you can have a consistent networking feature set and provisioning process all the way from the virtual machine access layer to the core of the