diff --git a/etc/kayobe/inventory/group_vars/switches/interfaces b/etc/kayobe/inventory/group_vars/switches/interfaces
new file mode 100644
index 0000000..e7e8ce3
--- /dev/null
+++ b/etc/kayobe/inventory/group_vars/switches/interfaces
@@ -0,0 +1,20 @@
+---
+# Switch configuration.
+
+###############################################################################
+# Interface configuration.
+
+# Interface configuration. Dict mapping switch interface names to configuration
+# dicts. Each dict contains a description item and the name of a network which
+# is used to lookup a variable containing interface config for ports on that
+# network (switch_interface_config_<network>). Each dict can also have a 
+# 'config' item which should contain a list of additional per-interface
+# configuration.
+# Generally this should be configured on a per-switch basis via a host_vars
+# file.
+switch_interface_config: {}
+
+# Example of an interface configuration variable for a network, referenced by
+# the 'network' item of an interface in 'switch_interface_config'.
+#switch_interface_config_example_net:
+#  - switchport access vlan 42
diff --git a/etc/kayobe/inventory/groups b/etc/kayobe/inventory/groups
index 15f9ea9..0212af5 100644
--- a/etc/kayobe/inventory/groups
+++ b/etc/kayobe/inventory/groups
@@ -11,3 +11,20 @@
 # Hosts in this group will have Docker installed.
 seed
 controllers
+
+###############################################################################
+# Networking groups.
+
+[mgmt-switches]
+# Empty group to provide declaration of mgmt-switches group.
+
+[ctl-switches]
+# Empty group to provide declaration of ctl-switches group.
+
+[hs-switches]
+# Empty group to provide declaration of hs-switches group.
+
+[switches:children]
+mgmt-switches
+ctl-switches
+hs-switches
diff --git a/etc/kayobe/inventory/hosts.example b/etc/kayobe/inventory/hosts.example
index 16b7dbf..b3dc7a3 100644
--- a/etc/kayobe/inventory/hosts.example
+++ b/etc/kayobe/inventory/hosts.example
@@ -17,3 +17,12 @@ localhost ansible_connection=local
 [controllers]
 # Add controller nodes here if required. These hosts will provide the
 # OpenStack overcloud.
+
+[mgmt-switches]
+# Add management network switches here if required.
+
+[ctl-switches]
+# Add control and provisioning switches here if required.
+
+[hs-switches]
+# Add high speed switches here if required.