VMware SOFTWARE REPOSITORY FOR WINDOWS 1.1 Uživatelský manuál stáhnout pdf (Strana 23)

Reference Architecture for Active System 1000 with VMware vSphere

Page 20

Traffic isolation using VLANs: LAN traffic is separated into four unique VLANs; one VLAN each for

management, vMotion, VM traffic, and out-of-band management. Network traffic is tagged with the

respective VLAN ID for each traffic type in the virtual switch. Routing between the management and

out-of-band management VLANs is required to be configured in the core or the Dell Networking S4810

switches. Additionally, the Dell Networking S4810 switch ports that connect to the blade servers are

configured in VLAN trunk mode to pass traffic with different VLANs on a given physical port. The table

2 below provides an overview of different traffic types segregated by VLANs in the Active System

1000v, and which network devices with which they are associated.

Table 2: VLAN Overview

Traffic Type

(VLAN segregation)

Description

Associated Network Device

Management

vSphere management traffic and Active

System 1000v management services

Broadcom NDC and

Broadcom Network Adapter

vMotion

VMware vMotion traffic

Broadcom NDC and

Broadcom Network Adapter

LAN traffic generated by compute cluster

VMs

Broadcom NDC

Out-of-Band

Management

Out-of-Band Management traffic

iDRAC, CMC, Brocade, and

Compellent Management

Ports

Load Balancing and Failover: This solution uses Route based on the originating virtual switch port ID

configuration at the vSwitch for load balancing the LAN traffic. With this option, any given virtual

network adapter will use only one physical adapter port at any given time. In other words, if a VM has

only one virtual NIC, it will use only one physical adapter port at any given time. The reason for

choosing this option is that it is easy to configure and provides good load balancing across VMs,

especially in the case of a large number of VMs.

Virtual Link Trunking (VLT) for S4810s: Inside each Active System 1000v, a Virtual Link Trunking

interconnect (VLTi) is configured between the two Dell Networking S4810 switches using the Virtual

Link Trunking (VLT) technology. VLT peer LAGs are configured between the Dell I/O modules and Dell

Networking S4810 switches, and also between the Dell Networking S55 switch and the Dell Networking

S4810 switches.

Virtual Link Trunking technology allows a server or bridge to uplink a single trunk into more than one

Dell Networking S4810 switch, and to remain unaware of the fact that the single trunk is connected to

two different switches. The switches, a VLT-pair, make themselves appear as a single switch for a

connecting bridge or server. Both links from the bridge network can actively forward and receive

traffic. VLT provides a replacement for Spanning Tree-based networks by providing both redundancy

and active-active full bandwidth utilization.

Major benefits of VLT technology are:

1. Dual control plane on the access side that lends resiliency.

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