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-rw-r--r--network/config/bond-with-vlans/README.md12
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diff --git a/network/config/bond-with-vlans/README.md b/network/config/bond-with-vlans/README.md
index 1679df3c..98879b4f 100644
--- a/network/config/bond-with-vlans/README.md
+++ b/network/config/bond-with-vlans/README.md
@@ -1,6 +1,12 @@
This directory contains Heat templates to help configure
Vlans on a bonded pair of NICs for each Overcloud role.
+There are two versions of the controller role template, one with
+an external network interface, and another without. If the
+external network interface is not configured the ctlplane address
+ranges will be used for external (public) network traffic.
+
+
Configuration
-------------
@@ -13,3 +19,9 @@ something like this:
OS::TripleO::Controller::Net::SoftwareConfig: network/config/bond-with-vlans/controller.yaml
OS::TripleO::ObjectStorage::Net::SoftwareConfig: network/config/bond-with-vlans/swift-storage.yaml
OS::TripleO::CephStorage::Net::SoftwareConfig: network/config/bond-with-vlans/ceph-storage.yaml
+
+Configuration with no External Network
+--------------------------------------
+Same as above except set the following value for the controller role:
+
+ OS::TripleO::Controller::Net::SoftwareConfig: network/config/bond-with-vlans/controller-no-external.yaml