vrf: add initial documentation

2 files changed, 67 insertions, 0 deletions

diff --git a/docs/index.rst b/docs/index.rst
index 8f2c0bbd..5a4c44ac 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -38,6 +38,7 @@ VyOS User Guide
    services/index
    firewall
    routing/index
+   vrf
    nat
    nptv6
    qos
diff --git a/docs/vrf.rst b/docs/vrf.rst
new file mode 100644
index 00000000..2191fdf6
--- /dev/null
+++ b/docs/vrf.rst
@@ -0,0 +1,66 @@
+.. _vrf:
+
+###
+VRF
+###
+
+:abbr:`VRF (Virtual Routing and Forwarding)` devices combined with ip rules
+provides the ability to create virtual routing and forwarding domains (aka
+VRFs, VRF-lite to be specific) in the Linux network stack. One use case is the
+multi-tenancy problem where each tenant has their own unique routing tables and
+in the very least need different default gateways.
+
+Configuration
+=============
+
+A VRF device is created with an associated route table. Network interfaces are
+then enslaved to a VRF device.
+
+.. cfgcmd:: set vrf name <name>
+
+   Create new VRF instance with `<name>`. The name is used when placing individual
+   interfaces into the VRF.
+
+.. cfgcmd:: set vrf name <name> table <id>
+
+   Configure use routing table `<id>` used by VRF `<name>`.
+
+   .. note:: A routing table ID can not be modified once it is assigned. It can
+      only be changed by deleting and re-adding the VRF instance.
+
+
+.. cfgcmd:: set vrf bind-to-all
+
+   By default the scope of the port bindings for unbound sockets is limited to
+   the default VRF. That is, it will not be matched by packets arriving on
+   interfaces enslaved to a VRF and processes may bind to the same port if
+   they bind to a VRF.
+
+   TCP & UDP services running in the default VRF context (ie., not bound to any
+   VRF device) can work across all VRF domains by enabling this option.
+
+Operation
+=========
+
+.. opcmd:: show vrf
+
+   List VRFs that have been created
+
+   .. code-block:: none
+
+     vyos@vyos:~$ show vrf
+
+     interface         state    mac                flags
+     ---------         -----    ---                -----
+     bar               up       ee:c7:5b:fc:ae:f9  noarp,master,up,lower_up
+     foo               up       ee:bb:a4:ac:cd:20  noarp,master,up,lower_up
+
+.. opcmd:: show vrf <name>
+
+   .. code-block:: none
+
+     vyos@vyos:~$ show vrf name bar
+     interface         state    mac                flags
+     ---------         -----    ---                -----
+     bar               up       ee:c7:5b:fc:ae:f9  noarp,master,up,lower_up
+