Exinda EXNV-10063, Руководство администратора

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Exinda Network Orchestrator 2 Getting started | 17
2.2 Deployment options
An Exinda Appliance fits almost anywhere in your network environment. As a general rule, anywhere network packets
move from one device to another, whether via physical cables or virtualization, you can plug in an Exinda Appliance.
In this section of the guide, you'll walk-through the most common Exinda Appliance deployments.
Many of the example topologies you'll see are used by Exinda customers from various industries around the globe. The
list is by no means exhaustive, but you'll undoubtedly find something similar enough to your network environment for
you to build on.
2.2.1 Key terms
Throughout the deployment options section, you'll see common networking terms you may already be familiar with.
Depending on your background and experience, you may have seen the terms used slightly differently than the way
they're used in this guide.
To make the deployment examples clear and concise, the terms and definitions are included here.
Term Definition
In-path In-path describes a type of topology and refers to deploying an Exinda Appliance between network devices that
send and receive data packets to each other, like a switch and a router. When an Exinda Appliance is in-path, it
automatically inspects all packets traveling along its path.
Out-of-path An Exinda Appliance connected to only one network device is considered out-of-path. By default, that implies net-
work packets don't naturally travel through the Exinda Appliance to get to their destinations. For example, con-
necting an Exinda Appliance to a switch or hub on the LAN. In this case, the Exinda Appliance behaves like any other
network client and requires specific protocols or modes to enable packet monitoring and inspection.
Inline In network terminology, an inline device receives packets and forwards them to their intended destination. Routers,
firewalls and switches are examples of inline devices. The inline designation also alerts you the device is critical to
network function. If the device goes down, network traffic is affected. In an in-path topology, an Exinda Appliance is
deployed Exinda Appliancesinline in the network.
Clustering Grouping Exinda Appliances together in systems to perform the same functions in each system or to mirror each
other. Example scenarios include failover, load balancing and multipath networks.
Application
Acceleration Application Acceleration is an intelligent network enhancer based on a set of proprietary algorithms embedded in
an Exinda Appliance. It reduces latency, increases network throughput, frees network capacity and a whole lot more.
To get the benefits of Application Acceleration, you need at least two Exinda Appliances.
2.2.2 Basic characteristics and behaviors of Exinda Appliances
All Exinda Appliance hardware models share some basic characteristics and behaviors. This list provides helpful
information to keep in mind while planning and implementing a deployment.
Every Exinda Appliance has at least one pair of hardware bypass ports marked LAN and WAN.
Exinda Appliance LAN and WAN ports failover to pass-through mode in the event of system failure or power loss.
It's best practice to deploy the Exinda Appliance powered off. This ensures the hardware bypass is working.
NOTE
There may be a short interruption to network connectivity while the Exinda appliance switches out of bypass mode
during boot-up. Although switching in and out of bypass takes less than a millisecond, this may force neighboring
equipment to renegotiate their layer 2 topology, which could take several seconds