Understanding the VMware Infrastructure and the vGW Series

The Juniper Networks vGW Series runs as integrated software on VMware vSphere servers.

This topic includes the following sections:

Understanding vSphere and the vGW Series

VMware vSphere is a cloud operating system that can manage large pools of virtualized computing infrastructure, including software and hardware. The vGW Series components integrate with the VMware vSphere infrastructure. Because the vGW Series is purpose-built to support virtualization, it synchronizes automatically with the VMware vCenter. It uses VMware’s VMsafe interfaces to provide breakthrough levels of security and performance.

Note: Beginning with vGW Series 5.0r2, vGW Series provides support for vSphere 5.0, which requires ESXi hosts (and does not support ESX hosts).

Understanding VMware ESX and ESXi Hosts and the vGW Series

VMware ESX and ESXi hosts provide the foundation for building and managing a virtualized IT environment. These hypervisor-based hosts contain abstract processors, memory, storage and networking resources that are shared among multiple virtual machines that run unmodified operating systems and applications.

The vGW Series manages and secures the VMs that run on ESX and ESXi hosts.

Understanding vMotion and vGW Series

VMware provides a feature called vMotion that allows for transition of active, or live, VMs from one physical server to another. VMs can be moved from one server to another to perform maintenance operations on the host. Also, they can be moved automatically when vMotion is triggered through VMware’s Dynamic Resource Scheduler (DRS), which is used to evenly distribute system resource usage across physical servers.

Because VMs can be migrated between servers, their security levels can be compromised and lowered to those of the new system. A VM could be migrated to an unsecured zone or one with a lower trust level.

Unlike traditional firewalls, the vGW Series firewall supports live migration by maintaining open connections and security throughout the event. The vGW Series ensures that appropriate security for a VM remains intact throughout migration.

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