FRR (Free Range Routing) is an open-source IP routing protocol suite for Linux and Unix platforms. It enables dynamic routing in networks by supporting multiple widely used protocols, making it suitable for service providers, data centers, and enterprise environments.

Features of FRR:

• Implements major routing protocols like BGP, OSPFv2/OSPFv3, IS-IS, RIP/RIPng, and PIM.
• Includes a modular architecture with separate daemons for each protocol.
• Provides advanced routing features such as route filtering, VRF support, and MPLS (with LDP).
• Integrates with the Linux kernel routing table for seamless operation.
• Supports policy-based routing and prefix lists for granular control.
• Offers a command-line interface via vtysh for unified configuration and management.

To check the installed version of FRR, run these commands in your environment:

$ sudo su
$ sudo apt update
$ sudo vtysh 

Disclaimer: FRR is open-source software licensed under the GNU General Public License (GPL). It is developed and maintained by the community and widely adopted in cloud, ISP, and enterprise networks. Users should refer to the official documentation for configuration and usage. Use at your own risk; the developers are not responsible for any network disruptions or misconfigurations caused by improper usage.