The Subnet Matching feature helps CDN Mesh Delivery for Enterprises customers better handle p2p traffic inside their corporate network and limit inter-site data transfers. It rely on pre-defined Sites on the Dashboard.

Sites are groups of users forming a mesh network that only allows video data transfer within itself. With well-defined sites, no video data will be transferred from one site to another ensuring that each sites outbound upload bandwidth is not used, and that download bandwidth is only used to get content from the CDN for a small fraction of users.

Enabling Subnet Matching

Properties are a way to fine-tune various parameters across all your CDN Mesh Delivery integrations and can be accessed under the “Properties” section in the dashboard. See our documentation for more information on them.

The Subnet Matching Mode option is accessible to CDN Mesh Delivery for Enterprises customers.

The drop down allows you to pick on of the 3 available Modes (see detailed explanation of each mode below).

• Map
• Mask (Since DNA 2.16)
• Map + Mask (Since DNA 2.16)

Map Mode

The (Network) Map Mode allows to fully define your sites and guarantees that p2p exchanges only happen within a site. You can also configure sites that are not to do p2p (VPN users for instance). A site can be composed of a single subnet or multiple subnets and can be added in the Subnets section.

Sites are composed of three values:

Whenever a viewer connect to the stream, we will gather it's public and private IP (if available) and check to see if it belongs to a sites.
Note
You can define sites relying only on public IP by entering "0.0.0.0/0" in the subnets column since DNA 2.17.
This will be considered as a wildcard on private IP by our system and all viewers (even those without access to their private IP) will be considered belonging to this subnet if their public IP is matching regardless of private IP.

Creating Sites

The streamroot dashboard allows you to add your sites through a CSV upload or by manually entering them through the Streamroot user interface.

Upload your CSV

The CSV upload function allows you to conveniently upload all your sites to Streamroot. The CSV must be in the following format:

name,dnaEnabled,publicIPs,subnets

For example,

name,dnaEnabled,publicIPs,subnets
Tokyo,true,"203.0.113.1,198.51.100.1",192.0.2.0/29
Rio,false,198.51.100.0/30,"192.0.2.1/29,203.0.113.2/32"
Paris,true,124.50.51.0/30,0.0.0.0/0

To upload your CSV:

1. Navigate to the Subnets page.

2. Click the 'Upload CSV' button on the top right corner of the page.

3. Select your file to upload.

4. Choose your method of upload.

- Add to site list will add the sites in the CSV to the existing list of sites already in Streamroot.

- Replace site list will completely remove any existing sites in Streamroot and replace it with the sites in the CSV.

5. Click Submit.

Manually through the dashboard user interface

If you do not have a CSV to upload, you can add your sites directly through the Streamroot user interface

1. Navigate to the Subnets page.

2. Click the 'Create' button on the top right corner of the page.

3. Enter the Name of your site, toggle ON or OFF P2P, enter the public IPs, and the subnet IPs within the site.

4. Click 'Save' on the top right corner of the page.

Editing Sites

Saved sites in Streamroot can be edited to reflect any changes you might have in your configurations. You can change the name of your site as well as add or remove any public IPs or subnet IPs.

To do this, click the edit icon for the site you would like to edit.

Export to CSV

If you need a complete list of all your sites and their respective public and subnet IPs, you can export them to a CSV with a click of a button. Once you click the 'Export to CSV' button, a CSV file will download to your browser.

Deleting Sites

Sites that are no longer in use to your company can be deleted. Deleting sites will permanently remove the sites from Streamroot and cannot be retrieved again. To ensure you don't lose your data, we recommend exporting your sites to CSV before deleting any sites.

Mask Mode

The Mask Mode allows to define sites with minimal configuration efforts. 
The only thing you need to provide is your Subnet Prefix Length (an integer between 1 and 32).
Each device applies a mask to its private IP (by selecting the Subnet Prefix Length first bits of its private IP). The resulting number will be the site ID to which this device belongs.

Example: if my private IP is 192.168.165.010 and my Subnet Prefix Length is 16, I belong to site "192.168".

If you have various subnet size in your network:
- providing us with the smallest size will guarantee that p2p traffic will stay inside subnets but it will break potentially bigger subnets into smaller ones, limiting overall p2p traffic.
- providing us with the biggest size will maximise p2p performance at the expense of allowing smaller subnets to be grouped into bigger subnets.

Map + Mask Mode

The Map + Mask Mode allows to fully define the sites you know in detail (Map) and define sites you don’t know in details with minimal configuration efforts (Mask). Fully defined sites can be composed of a single subnet or multiple subnets and can be added in the Subnets section.

Unknown Devices

No matter the mode you picked, the Unknown Devices options lets you decide if viewers for which we were unable to assign a site should do P2P between themselves or not.

In Map mode, this corresponds to devices:
- with pair (Public IP, Private IP) not belonging to any subnet listed in the Map.
- unable to access their private IP.

In Mask mode and Map + Mask mode, this corresponds to devices who were unable to access their private IP.