ovn-ic: Route advertisement.

Support automatical route advertisement and learning for OVN interconnection. Static routes and directly connected subnets can be automatically advertised to avoid manual configuration across AZs. This feature is disabled by default, and can be enabled at each AZ level by: ovn-nbctl set NB_Global . options:ic-route-ad=true \ options:ic-route-learn=true More options are available. See ovn-nb(5). Acked-by: Numan Siddique <[email protected]> Signed-off-by: Han Zhou <[email protected]>
HughNhan · Feb 14, 2020 · 57b347c · 57b347c
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diff --git a/Documentation/tutorials/ovn-interconnection.rst b/Documentation/tutorials/ovn-interconnection.rst
@@ -180,9 +180,36 @@ In ovn-east, add below route ::
 
     $ ovn-nbctl lr-route-add lr1 10.0.2.0/24 169.254.100.2
 
-In ovs-west, add below route ::
+In ovn-west, add below route ::
 
     $ ovn-nbctl lr-route-add lr2 10.0.1.0/24 169.254.100.1
 
 Now the traffic should be able to go through between the workloads through
 tunnels crossing gateway nodes of ovn-east and ovn-west.
+
+Route Advertisement
+-------------------
+
+Alternatively, you can avoid the above manual static route configuration by
+enabling route advertisement and learning on each OVN deployment ::
+
+    $ ovn-nbctl set NB_Global . options:ic-route-adv=true \
+                                options:ic-route-learn=true
+
+With this setting, the above routes will be automatically learned and
+configured in Northbound DB in each deployment.  For example, in ovn-east, you
+will see the route ::
+
+    $ ovn-nbctl lr-route-list lr1
+    IPv4 Routes
+                 10.0.2.0/24             169.254.100.2 dst-ip (learned)
+
+In ovn-west you will see ::
+
+    $ ovn-nbctl lr-route-list lr2
+    IPv4 Routes
+                 10.0.1.0/24             169.254.100.1 dst-ip (learned)
+
+Static routes configured in the routers can be advertised and learned as well.
+For more details of router advertisement and its configure options, please
+see <code>ovn-nb</code>(5).
diff --git a/TODO.rst b/TODO.rst
@@ -149,5 +149,3 @@ OVN To-do List
 * OVN Interconnection
 
   * Packaging for RHEL, Debian, etc.
-
-  * Route advertisement between edge routers.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -149,5 +149,3 @@ OVN To-do List
		* OVN Interconnection

		* Packaging for RHEL, Debian, etc.

		* Route advertisement between edge routers.