JIRA: IPVSIX-29

Change-Id: Ie42e3adeb05d09fb4741ba5ea806c8b8f22a23ba
Signed-off-by: Bin Hu <bh526r@att.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/docs/setupservicevm/index.rst b/docs/setupservicevm/index.rst
index 1983adc..d116c5f 100644
--- a/docs/setupservicevm/index.rst
+++ b/docs/setupservicevm/index.rst
@@ -7,14 +7,19 @@ Setting Up a Service VM as an IPv6 vRouter
 :Authors: Bin Hu (AT&T), Sridhar Gaddam (RedHat)
 
 :Abstract: This document provides the users with installation guidelines to create a Service VM as
-           an IPv6 vRouter in OPNFV environment, i.e. integrated OpenStack with Open Daylight environment.
-           The complete set of instructions walk you through every step of preparing the infrastructure,
-           setting up Open Daylight and OpenStack, creating service VM and IPv6 subnet, and testing and
-           validating the setup.
+           an IPv6 vRouter in OPNFV environment, i.e. integrated OpenStack with Open Daylight
+           environment. There are three scenarios. Scenario 1 is pre-OPNFV environment, i.e. a native
+           OpenStack environment without Open Daylight Controller. Scenario 2 is an OPNFV environment
+           where OpenStack is integrated with Open Daylight Official Lithium Release which not only
+           does not support IPv6 L3 Routing but also has a bug in net-virt provider implementation
+           that throws Java exception. Scenario 3 is similar to Scenario 2. However, Open Daylight
+           Lithium is patched with a fix of Java exception. The complete set of instructions walk
+           you through every step of preparing the infrastructure, setting up Open Daylight and
+           OpenStack, creating service VM and IPv6 subnet, and testing and validating the setup.
 
 .. toctree::
    :numbered:
    :maxdepth: 4
 
    5-ipv6-configguide-scenario-1-native-os.rst
-   scenario-3.rst
+   scenario-2.rst