This feature is a small one, but one that has been requested by a deceptively high amount of our users! A lot of screens in Kentik portal let the user scroll through a list of "Objects", and these list views are usually filterable by a variety of attributes that depend on the nature of the object: Interfaces, Devices, Sites, Synthetic Tests, Synthetic Agents... Users have asked us to make it quicker for them to select these objects using combination of labels. Read on !

About a year ago, we released an updated version of our new Role Based Access Control system that leveraged Labels in order to make management of permissions on labels a much more efficient task, where users were now able to apply permissions on collections of Objects (aka Dashboards, Saved Views, Synthetic Monitoring Agents, Synthetic Monitoring Tests, Devices, Credentials ...).
This made Labels in Kentik more valuable, useful, and central to the entire product.

One of the requests that kept coming back to us from our users was the ability for the user in these list-type screens to be able to better filter on either Intersection or Union of labels.
A simple way to look at it, a very common need that surfaced when we released the unified Traffic and NMS Device screens was, for instance: 

Show me all my Routers that both have CDN Caches connected to them AND are used to connect transit providers

A common way for our users to add this metadata to devices would be to leverage the flexibility of Labels – and our new UI allows them to narrow down the list of devices from the Device Management Screen using a logical AND expression in the filter as shown below.

Notice how the top-right of the Label input filter now contains an AND/OR selector ? 
This is how you do it: AND will Intersect all labels in the field, while OR will display the union of objects with the labels in the field.

Going back to our example, this is what it would look like in the Device Management screen:

Another pretty common ask was, for example:

Show me all the Synthetic Tests configured to be used in Production AND built to monitor Kentik Portal

...and in this case, users would also use a set of labels to describe which tests are used by the Production Team, and which tests are focused around monitoring Kentik Portal. Notice how we drink our own champagne in the screenshot below 😉

The Library module in Kentik Portal got a special treatment: remember how Kentik offers a lot of Preset Dashboards and Saved views ? (by the way, always peruse our library, a lot of the presets here have been built for our own needs, chances are every time you want to create a Dashboard or a Saved View, one of our Network Nerds over at Kentik has already produced something similar for you to use or steal inspiration from)

In this special case, the Library Label Filtering capability allows users to expand and contract two categories of labels: Kentik Presets and Your Own Company Labels, as displayed in the example below.

Hope you find this feature useful!