Prefix Lists

Miralem Cebic Updated by Miralem Cebic

Introduction to Prefix Lists

The Prefix Lists feature in the DE-CIX Cloud ROUTER API enables users to define and manage sets of IP prefixes for fine-grained control over routing policies. By creating prefix lists, users can match specific IP address ranges and apply these lists to routing policies for advanced traffic filtering and management.

Key Benefits

Enhanced Routing Control:

Prefix lists allow users to specify precisely which IP prefixes are permitted or denied in a routing policy, enabling greater control over the flow of network traffic.

Simplified Policy Management:

Instead of managing individual prefixes manually, users can group multiple prefixes into a single list, reducing complexity and improving readability.

Customizable Rules:

Define flexible matching criteria with attributes like min_length and max_length for each prefix, ensuring granular control over route matching.

Improved Security:

By limiting the routes that can be announced or received, prefix lists help mitigate routing issues and prevent unauthorized traffic from entering the network.

What to Expect

With the Prefix Lists, users can:

  • Create prefix lists by defining a name, associating accounts, and specifying a match_list of prefixes.
  • Customize matching behavior using min_length and max_length attributes for each prefix.
  • Apply prefix lists to inbound or outbound BGP policies for tailored route control.

Use Cases

  • Allowing only private IP ranges for internal network traffic.
  • Restricting route advertisements to specific IP ranges.
  • Defining dynamic lists for multiple BGP peers while minimizing configuration effort.
  • By leveraging prefix lists, users can simplify routing policy management and strengthen their network control.

Example Usage

Here’s an example of a prefix list creation request (see Create Prefix List):

How did we do?

Prefix Lists & Policies in Cloud ROUTER

Policies

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