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---
name: Linux Control Plane (integration)
maintainer: Neale Ranns <neale@grahpiant.com>
description: |-
These plugins provide an integration with the Linux network stack.
The "linux_cp" plugin provides the capability to 'mirror' VPP interfaces
in the Linux kernel. This means that for any interface in VPP the user
can create a corresponding TAP or TUN device in the Linux kernel
and have VPP plumb them together.
The plumbing mechanics is different in each direction.
In the RX direction, all packets received on a given VPP interface
that are punted (i.e. are not dropped or forwarded) are transmitted
on its mirror interface (this includes for example ARP, ND etc,
so the recommendation is to disable ARP, ND, ping plugin).
In the TX direction, packets received by VPP an the mirror Tap/Tun
are cross-connected to the VPP interfaces. For IP packets, IP output
features are applied.
If MPLS is enabled on a VPP interface, state is synced to Linux and
in TX direction a special feature is enabled to pass MPLS packets through
untouched.
The "linux_nl" plugin listens to netlink messages and synchronizes the IP
configuration of the paired interfaces.
state: experimental
properties: [API, CLI, MULTITHREAD]
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