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Layer 2 Configuration

Add layer 2 configuration capabilities

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Details

Add layer 2 functionality into FRR. Specifically, add the ability to configure layer 2 type data in dataplanes. For example, configuring VRFs or interfaces in FRR, should create them in the dataplanes as well. This project will be scoped for the Linux dataplane.

For example, configuring interface and VRF information in FRR should create interfaces and VRFs in the kernel. In current FRR, we must configure those separately using another tool (iproute2 in Linux) and then reference them by name in FRR configurations.

This will require you to extend the appropriate lib/* APIs, dataplane code (zebra/rt_netlink.c), dataplane handler code (zebra/zebra_dplane.c), and add appropriate vty commands (*_vty.c) for the layer 2 configurations.

Quick Start

• Familiarize yourself with the dataplane handling in zebra/zebra_dplane.c
• Review how netlink kernel layer 2 messaging works. Our code is in zebra/if_netlink.c
• Learn how we parse the FRR cli
• Understand how interfaces and VRFs are created in the Linux kernel with iproute2

Mentors

Stephen Worley (@sworleys)
Quentin Young (@qlyoung)

Helpful Links

FRR dev guide
FRR user guide