In this section, we'll discuss licensing for the orchestrator and EdgeConnect appliances. Using the automated tools built into orchestrator, administrators can easily manage even the largest EdgeConnect. Orchestrator manages its features and those of the EdgeConnect appliances it manages, it's this control that gives EdgeConnect flexibility in deployment, management, maintenance, troubleshooting, and visibility. In this example, we add a new EdgeConnect to the network. Previously configured templates including deployment profiles, template groups, and business intent overlays are created and stored on the orchestrator, they are pushed to the EdgeConnect when the operator approves it. Also, underlay an overlay tunnels are automatically established between peers with the correct link speeds, addressing, and policies. Now that we've talked about some of these technologies and you have some contexts, let's briefly revisit how they fit into Aruba's licensing scheme. EdgeConnect appliances are now licensed according to the total throughput of the WAN interface on each appliance. Each of the tiers includes; bios, Zero Touch Provisioning, path conditioning, dynamic path control, high availability, and more. If you have one of the old license, things will continue normally until their expiration date, at which time they will be converted to the applicable tiers. A boost license sold in 100 megabit blocks is required to obtain TCP acceleration and network memory. TCP acceleration mitigates the effects of distance and latency while network memory reduces the amount of bandwidth required using deduplication and compression, boost can be allocated to individual machines as needed, so essentially, boost is a WAN optimization technology. Now let's look at boost, which is again, an optional set of WAN optimization features. You can optionally enable TCP acceleration and network memory with boost, boost enabled latency mitigation and data reduction is based on Aruba's groundbreaking WAN optimization technology, TCP acceleration helps you overcome the effects of latency and network memory helps you reduce the amount of bandwidth needed for your network. One of the most common network problems is high latency, latency is the delay in the network. Symptoms that are seen include an inability for the WAN routers to fully utilize available WAN bandwidth, applications operating slowly, users complaining of slowness, slow file shares even when bandwidth is available. The longer the delays in the network, the slower traffic moves regardless of actual link speed because among other things, devices need to receive acknowledgments for outstanding packets before they can transmit more data. The longer devices wait for acknowledgments, the longer it takes to do things like transfer a file. Beyond a certain point, buying more bandwidth won't help you. You won't be able to fill the pipe because of latency in the network. One of the culprits here is the speed of light, 186,000 miles per second, the universe keeps us from transmitting data over a distance faster than light can traverse the same distance, this means the farther apart two end points are, the longer the inherent latency is. Additionally, hop-by-hop propagation delays introduced by intermediary equipment, processing overhead in the transmission path, and to network latency. Finally, loss and congestion can give the appearance of latency since they slow things down because of lost packets and the resulting required retransmissions. TCP acceleration can't change the speed of light or eliminate processing delays, but it can help to reduce the effects of latency in your network. Running out of bandwidth on your WAN links can cause problems like dropped packets, along with the response time and connectivity problems that go with them. Users might complain of application slowness, your storage replication targets might not be met because you can't push data to your backup sites fast enough, sites and applications that used to work fine might begin to falter as growth in your network begins to saturate existing WAN links, EdgeConnect can help free up bandwidth with its network memory technology. In this section, we will explain the use and configuration settings of business intent overlays related to SD WAN traffic to internal subnets. Overlay configuration is summarized with a row for each business intent overlay, bio configuration is summarized with a row for each business intent overlay. You can see the four preconfigured business intent overlays; real-time, critical apps, bulk apps, and default overlay. You can configure up to seven bios in orchestrator, if regional routing is enabled, each bio can have a regional variant. Although many companies backhaul traffic destined for the Internet to a datacenter when connections are to trusted applications like Office 365 or Salesforce, users can get better performance without increase to risk if the applications are sent directly to the Internet from each office, this can also reduce required bandwidth and cost. EdgeConnect can instantly identify the traffic you would want to send direct to net with sophisticated built-in first packet recognition for tens of thousands of applications and millions of web domains. With Internet breakout, it's important to identify the destination as soon as possible, preferably on the first packet. The database on each appliance is updated daily, so new websites, applications, and addresses are automatically added with no action by the user. Many of these are pre-grouped into general categories that allow you to easily classify large amounts of your traffic by adding a group to an ACL. Additionally, if there are proprietary applications not covered by this database, you can define your own by identifying the addresses and port numbers, and adding them to the list with an easily recognized user-defined name. Another of the techniques used to automatically identify traffic destinations that might not already be in the database is DNS lookup snooping. If an EdgeConnect is in the lookup path, it can snoop the responses and dynamically identify any unknown addresses associated with a domain and add them to its database for immediate use. Since many applications in the cloud spin up additional servers on demand around the globe, new addresses can appear for a given application at anytime, this allows us to correctly classify traffic, connecting them to dynamic addresses. In this section, we'll discuss how Zero Touch Provisioning and Zero Touch Configuration simplify configuration of new EdgeConnect appliances, speed deployment, and reduce the chance of errors in your network. ZTP or Zero Touch Provisioning refers to a way an EdgeConnect can automatically register with the cloud portal and the orchestrator. ZTC, or Zero Touch Configuration refers to automatically configuring newly registered appliances, this is done with configuration files stored on orchestrator in advance of a new EdgeConnect registration. These pre-configuration files can be used with physical or virtual appliances and these files use the YAML markup language, which makes them easy to read and edit.
