Creating Optional Subnet Tags
Subnet tagging is a way of labeling IP address ranges within ThousandEyes with user-friendly names in order to filter by subnets or tags in the Traffic Insights data view. This feature is useful for identifying network traffic flows associated with specific user groups, departments, or client/server types, providing an easier way to view and analyze your network activity.
For example, you can create a subnet tag called "Developers" for the network subnet that is used by your dev team. Through application recognition, your monitoring device might classify traffic conversations as "AWS" or "Github". When the dev team complains that their build jobs are running too slowly, you can use Traffic Insights views to quickly isolate their network and traffic using a descriptive subnet name that is associated with the big surge of AWS traffic coming in from the developers. You'll also be able to see how it flows through your network.
Configure Subnet Tags
Subnet tagging configuration in Traffic Insights requires prior configuration of your IP subnets on your network. Within Traffic Insights, you can choose whether those subnets are identified by client or by server.
In the case of client subnet tagging, the tag is assigned if the client's IP matches the IP range specified for the subnet tag, and in the case of server subnet tagging, the tag is assigned if the server's IP matches the subnet.
Client subnet tagging allows you to mark/tag your clients or the originating source.
Server subnet tagging enables you to mark the resources or targets used in your network.
Fields required for configuring a subnet tag are:
Subnet Name: Enter a descriptive name such as “Engineering” or “guest wi-fi”.
Subnets: Type in one or more IP addresses or address ranges, hitting Enter after each one. Both IPv4 and IPv6 addressing is supported. For example, 1.1.1.1/12 or 2620:0:860:2::/64.
Type: Choose either Client or Server as the subnet type.
Choose Tags: Use + Add Tags to configure new tags and associate them with this subnet. To choose one or more existing tags, click in the text box to see a pop-up searchable list with check boxes.
View Your Subnet Tags
You can find the Subnets Tags screen at Traffic Insights > Settings > Subnets Tags. Once you've configured tags and they are showing onscreen, you can edit or delete them via each row's ellipsis (...), or select multiple by their checkboxes and use the Delete button at the bottom. Manage existing tags or configure new tags for existing subnets via the Tags Management button in the top right.
Understanding the Subnet Tag Table
Subnet Name: A unique name provided for this subnet using + Create Subnets. Note that the name is not the same as the subnet tags, which are re-usable.
Subnet: The IP address range associated with this subnet for example 192.168.110.0/24.
Type: Subnet type is either Client or Server.
Tags: One or more tags assigned to this subnet.
Created By: The ThousandEyes user who created this subnet.
Created On: Date this subnet was created.
Modified By: ThousandEyes user who last modified this subnet.
Modified On: Date this subnet was last modified.
... (ellipsis): Click to Edit or Delete each row.
Manage Your Tags
The Tags Management button lists and tracks your subnet tags (labels). Each tag shows the number of subnets associated. Add new tags using the Create New button in the lower left. You can then associate new tags with current subnets by using the Edit ellipsis on the Subnet Tagging Screen to add or remove tags from that subnet.
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