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-rw-r--r--docs/requirements/use_cases/l3vpn_any_to_any.rst9
-rw-r--r--docs/requirements/use_cases/l3vpn_ecmp.rst39
2 files changed, 40 insertions, 8 deletions
diff --git a/docs/requirements/use_cases/l3vpn_any_to_any.rst b/docs/requirements/use_cases/l3vpn_any_to_any.rst
index 4ad6a98..5fc5712 100644
--- a/docs/requirements/use_cases/l3vpn_any_to_any.rst
+++ b/docs/requirements/use_cases/l3vpn_any_to_any.rst
@@ -44,9 +44,9 @@ VRF Lets us do:
2. Segregation of Traffic
+
Derrived Requirements
~~~~~~~~~~~~~~~~~~~~~
- - TBD
Northbound API / Workflow
+++++++++++++++++++++++++
@@ -91,8 +91,8 @@ Dependencies on compute services
-Potential implementation
-~~~~~~~~~~~~~~~~~~~~~~~~
+Current implementation
+~~~~~~~~~~~~~~~~~~~~~~
Support for creating and managing L3VPNs is available in OpenStack Neutron by
means of the BGPVPN project [BGPVPN]_. In order to create the L3VPN network
@@ -129,8 +129,9 @@ is needed:
communicate with each other.
+
Gaps in the current solution
-~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TBD
diff --git a/docs/requirements/use_cases/l3vpn_ecmp.rst b/docs/requirements/use_cases/l3vpn_ecmp.rst
index c218179..c115a7a 100644
--- a/docs/requirements/use_cases/l3vpn_ecmp.rst
+++ b/docs/requirements/use_cases/l3vpn_ecmp.rst
@@ -32,26 +32,57 @@ can be load split from either WAN GW or another VM like G5.
Derrived Requirements
~~~~~~~~~~~~~~~~~~~~~
- - TBD
Northbound API / Workflow
+++++++++++++++++++++++++
- TBD
+
Data model objects
++++++++++++++++++
- TBD
+
Orchestration
+++++++++++++
- TBD
+
Dependencies on compute services
++++++++++++++++++++++++++++++++
- TBD
-Potential implementation
-++++++++++++++++++++++++
- - TBD
+Current implementation
+~~~~~~~~~~~~~~~~~~~~~~
+
+Support for creating and managing L3VPNs is in general available in OpenStack
+Neutron by means of the BGPVPN project [BGPVPN]_. However, the BGPVPN API does
+not yet support ECMP, but this feature is on the project roadmap. Hence, it is
+currently not possible to configure the networking use case as described above.
+
+
+
+Gaps in the current solution
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Given the use case description and the currently available implementation in
+OpenStack provided by BGPVPN project, we identify the following gaps:
+
+* [L3VPN-ECMP-GAP1] ECMP is current not yet supported by the BGPVPN API. The
+ Development of this feature is on the roadmap of the project, however.
+ TODO: add timeline and planned API
+
+* [L3VPN-ECMP-GAP2] It is not possible to assign the same IP to multiple Neutron
+ ports within the same Neutron subnet. This is due to the fundamental
+ requirement of avoiding IP collisions within the L2 domain which is a Neutron
+ network. A potential workaround is to create two subnets with the same IP ranges
+ and associate both with the same BGP VPN.
+
+
+
+Conclusion
+~~~~~~~~~~
+
+TBD