diff --git a/doc/source/devref/multisite_vim_usage_guide.rst b/doc/source/devref/multisite_vim_usage_guide.rst
index c51294f2f..9812a6396 100644
--- a/doc/source/devref/multisite_vim_usage_guide.rst
+++ b/doc/source/devref/multisite_vim_usage_guide.rst
@@ -68,10 +68,9 @@ remote OpenStack site.
 Default VIM configuration
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The default vim needs to be registered and added to tacker.conf under
-'nfvo_vim' section.  This is required when the optional argument -vim-id
-is not provided during vnf-create. Refer to steps described in
-`manual installation`_ to add it into tacker.conf.
+The default vim needs to be registered. This is required when the optional
+argument -vim-id is not provided during vnf-create. Refer to steps described in
+`manual installation`_ to register default vim.
 
 .. _manual installation: http://docs.openstack.org/developer/tacker/install/manual_installation.html#registering-default-vim
 
@@ -98,8 +97,9 @@ Deploying a new VNF on registered VIM
  +----------------+--------------------------------------+
 
 The --vim-id/--vim-name argument is optional during vnf-create. If
---vim-id/--vim-name is not specified, the 'default_vim' key in tacker.conf will
-be used to deploy VNF on the default site.
+--vim-id/--vim-name is not specified, the default vim will
+be used to deploy VNF on the default site. We can create default vim
+by specifying --is-default option with vim-register command.
 
 User can optionally provide --vim-region-name during vnf-create to deploy the
 VNF in a specify region  within that VIM.
diff --git a/doc/source/install/manual_installation.rst b/doc/source/install/manual_installation.rst
index 1934e29af..0dff7085e 100644
--- a/doc/source/install/manual_installation.rst
+++ b/doc/source/install/manual_installation.rst
@@ -305,34 +305,32 @@ required because the console will be locked by a running process.
 
 Registering default VIM
 =======================
-1). Register the VIM that will be used as a default VIM for VNF deployments.
+Register the VIM that will be used as a default VIM for VNF deployments.
 This will be required when the optional argument --vim-id is not provided by
 the user during vnf-create.
 
 .. code-block:: console
 
-    tacker vim-register --config-file config.yaml --name <Default VIM name>
-    --description <Default VIM description>
+    tacker vim-register --is-default --config-file config.yaml \
+        --name <Default VIM name> --description <Default VIM description>
 ..
 
 config.yaml will contain VIM specific parameters as below:
 
 .. code-block:: ini
 
-    auth_url: http://<keystone ip>:5000
+    auth_url: http://<keystone_public_endpoint_url>:5000
     username: <username>
     password: <password>
     project_name: <project_name>
 
-.. note::
-   Here username must point to the user having 'admin' and 'advsvc' role on the
-   project that will be used for deploying VNFs.
-
-2). Add the VIM name registered in step 1 in /etc/tacker/tacker.conf under
-[nfvo_vim] section:
+Add following parameters to config.yaml if VIM is using keystone v3:
 
 .. code-block:: ini
 
-   default_vim = <Default VIM Name>
+    project_domain_name: <domain>
+    user_domain_name: <domain>
 
-3). Restart tacker server
+.. note::
+   Here username must point to the user having 'admin' and 'advsvc' role on the
+   project that will be used for deploying VNFs.