VMware VMWARE CLOUD DIRECTOR 1.0 - TECHNICAL NOTE Guide de l'utilisateur télécharger pdf (Page 22)

TECHNICAL WHITE PAPER / 22

VMware vCloud Director Evaluator’s Guide

Cloud administrators can create External Networks that have quality of service (QoS), rich networking policies,

control and security, and integrate them easily into the cloud infrastructure.

5.3.2 Create Network Pools

Network pools are collections of isolated Layer 2 networks. Network pools provide the building blocks necessary

to create Organization and vApp networks. They are the key enabler for self-provisioning of networks in the cloud.

Organization networks are used for connectivity of vApps within an Organization. vApp networks are used for

connectivity of virtual machines within a vApp.

Networks from a Network Pool are created on the ﬂy by VMware vCloud Director each time the user creates an

Organization or vApp network. The pool size reduces by one. When a network is destroyed, the pool size

increases by one.

Network pools can be backed by:

 VLANs

 VMwarevCloudDirectorNetworkIsolationtechnology(VCDNI)

 Portgroups

To create a VLAN-backed Network Pool, you require a vDS and a range of VLAN IDs available to all hosts being

managed by VMware vCloud Director and on that vDS. Each time that a user creates a network in VMware

vCloud Director, a new portgroup is created on the vDS and a VLAN tag is attached to the portgroup. VMware

vCloud Director manages the VLAN tags as a pool and the tags are sequentially assigned and returned back to

the pool when the networks are deleted.

To create VCDNI Network Pools, all you need is a vDS attached to the ESXi/ESX hosts in the cloud. VMware

vCloud Director uses a MAC-in-MAC encapsulation technique to create an isolated Layer 2 network without

using a VLAN. Each time a user creates a VCDNI network, a new portgroup is created on the vDS and the

portgroup is removed when the network is deleted.

To create portgroup-backed Network Pools, you need to have a preconﬁgured set of portgroups either on a vDS

or on a standard vSwitch. These portgroups must be isolated, either with VLANs or with separate physical

uplinks. VMware vCloud Director manages the portgroups as a pool and creates a new network on a portgroup

when a user creates a network. It returns the portgroup back to the pool when the network is deleted.

NETWORK POOL BUILDING BLOCKS

VLAN backed

+ range of VLAN tags

VCDNI backed

+ one VLAN for transport

Portgroup backed

or portgroups

Figure 5-3-2-1.

During this evaluation, we will create VCDNI-backed Network Pools.

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VMware VMWARE CLOUD DIRECTOR 1.0 - TECHNICAL NOTE Guide de l'utilisateur Page 22